Low-energy and high pressure, hydraulic, pneumatic engine

The present invention relates to a low-energy and high pressure, hydraulic, pneumatic engine which operates without using gasoline or diesel, thus avoiding discharge of harmful substance or gas and pollution, and the hydraulic oil recycles and reuses repeatedly, thus obtaining environmental protection.

And the high pressure gas forces the hydraulic oil so as to circulate the hydraulic oil, and the communication of the high pressure and the low pressure matches with the circulation space of the fluid operation to produce the torque, hence four strokes cycle of intake, compression, combustion and exhaust are not required.

A conventional engine structure contains fuel oils (such as gasoline and diesel) used as power source of the conventional engine structure in four strokes cycle of intake, compression, combustion and exhaust so as to drive engine. However, the environmental awareness enhances and the source of the fuel oil will be consumed one day. Thus, searching new energy as power or designing new design is an importance issue.

Another conventional engine contains multiple valve sets so as to provide gas to a cylinder, to press, to burst, and to discharge the gas. Accordingly, the conventional engine is complicated.

The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.

The primary objective of the present invention is to provide a low-energy and high pressure, hydraulic, pneumatic engine which operates without using gasoline or diesel so as to produce high-pressure gas to act with hydraulic oil, hence four strokes cycle of intake, compression, combustion and exhaust are not required, and power output is finished.

Secondary objective of the present invention is to provide a low-energy and high pressure, hydraulic, pneumatic engine which does not use gasoline or diesel as fuel oil so as to drive the engine and does not discharge any polluted substances, thus obtaining environmental protection.

Further objective of the present invention is to provide a low-energy and high pressure, hydraulic, pneumatic engine which produces liquids between the low-energy and high pressure gas and the hydraulic oil to achieve circulation space of fluid operation, to cause power of circulation of low-energy and high pressure and low pressure and pressure of the low-energy and high pressure, and to turn on of accelerators of recycle cylinders, thus occurring no resistance of force difference so as to produce torque.

Another objective of the present invention is to provide a low-energy and high pressure, hydraulic, pneumatic engine which produces liquids between the low-energy and high pressure gas and the hydraulic oil so as to achieve circulation space of fluid operation and to cause of recycle space of no resistance and circulation space of liquid, thus outputting power source.

FIG. 1 is a perspective view showing the assembly of a low-energy and high pressure, hydraulic, pneumatic engine in accordance with a preferred embodiment of the present invention.

FIG. 2 is another perspective view showing the assembly of the low-energy and high pressure, hydraulic, pneumatic engine in accordance with the preferred embodiment of the present invention.

FIG. 3 is a front plan view showing the assembly of the low-energy and high pressure, hydraulic, pneumatic engine in accordance with the preferred embodiment of the present invention.

FIG. 4 is a cross sectional view showing the assembly of the low-energy and high pressure, hydraulic, pneumatic engine in accordance with the preferred embodiment of the present invention.

FIG. 5A is a perspective view showing the exploded components of a part of the low-energy and high pressure, hydraulic, pneumatic engine in accordance with the preferred embodiment of the present invention.

FIG. 5B is a side plan and cross sectional view showing the assembly of a part of the low-energy and high pressure, hydraulic, pneumatic engine in accordance with the preferred embodiment of the present invention.

FIG. 5C is another side plan and cross sectional view showing the assembly of a part of the low-energy and high pressure, hydraulic, pneumatic engine in accordance with the preferred embodiment of the present invention.

FIG. 5D is also another side plan and cross sectional view showing the assembly of a part of the low-energy and high pressure, hydraulic, pneumatic engine in accordance with the preferred embodiment of the present invention.

FIG. 5E is still another side plan and cross sectional view showing the assembly of a part of the low-energy and high pressure, hydraulic, pneumatic engine in accordance with the preferred embodiment of the present invention.

FIG. 6 is a perspective view showing the exploded components of a part of the low-energy and high pressure, hydraulic, pneumatic engine in accordance with the preferred embodiment of the present invention.

FIG. 7 is another perspective view showing the exploded components of a part of the low-energy and high pressure, hydraulic, pneumatic engine in accordance with the preferred embodiment of the present invention.

FIG. 8 is also another perspective view showing the exploded components of a part of the low-energy and high pressure, hydraulic, pneumatic engine in accordance with the preferred embodiment of the present invention.

FIG. 9 is still another perspective view showing the exploded components of a part of the low-energy and high pressure, hydraulic, pneumatic engine in accordance with the preferred embodiment of the present invention.

FIG. 10 is another perspective view showing the exploded components of a part of the low-energy and high pressure, hydraulic, pneumatic engine in accordance with the preferred embodiment of the present invention.

FIG. 11 is also another perspective view showing the exploded components of a part of the low-energy and high pressure, hydraulic, pneumatic engine in accordance with the preferred embodiment of the present invention.

FIG. 12 is still another perspective view showing the exploded components of a part of the low-energy and high pressure, hydraulic, pneumatic engine in accordance with the preferred embodiment of the present invention.

FIG. 13 is another perspective view showing the exploded components of a part of the low-energy and high pressure, hydraulic, pneumatic engine in accordance with the preferred embodiment of the present invention.

FIG. 14 is also another perspective view showing the exploded components of a part of the low-energy and high pressure, hydraulic, pneumatic engine in accordance with the preferred embodiment of the present invention.

FIG. 15 is a cross sectional view showing the assembly of a part of the low-energy and high pressure, hydraulic, pneumatic engine in accordance with the preferred embodiment of the present invention.

The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, a preferred embodiment in accordance with the present invention.

With reference to FIGS. 1-4 , a low-energy and high pressure, hydraulic, pneumatic engine in accordance with a preferred embodiment of the present invention comprises: a casing device a 1 , two main-cylinder devices a 2 , a holder device a 3 , two main-crankshaft devices a 4 , two recycle-valve devices a 5 , two swing-arm devices a 6 , two movable-valve devices a 7 , two recycle-cylinder devices a 8 , two recycle-crankshaft devices a 9 , and two umbrella-shaped gear devices a 10 .

Referring to FIGS. 1-4 and 5A , the casing device a 1 includes a switch base 74 , a switch fitting sleeve 73 , a connection tube 72 , a switch disc 71 , a pressure switch disc 18 , a circular partition 17 , a pressure rotating disc 16 , a pressure rotating base 70 , a switch cap 14 , a case 26 , a pressure disc 27 , two movement posts 2 , a pressure groove cap 75 , a pressure gauge 76 , and multiple connecting screws 37 , 49 . Referring to FIG. 5B , the switch disc 71 has a first groove 7101 defined inside a rim of a side thereof so as to accommodate multiple steel balls 32 , and the switch disc 71 has three first orifices 7103 defined on a central position thereof and screwing with three O rings 7102 respectively. As shown in FIG. 5C , the pressure switch disc 18 includes a second groove 1801 defined inside rims of two sides thereof respectively so as to accommodate the multiple steel balls 32 , and the second groove 1801 stacks with the first groove 7101 of the switch disc 71 ; the circular partition 17 has two third grooves 1704 defined inside rims of two sides thereof respectively so as to house the multiple steel balls 32 , and the third groove 1704 stacks with the second groove 1801 of the pressure switch disc 18 . As shown in FIG. 5D , the pressure rotating disc 16 has two fourth grooves 1601 defined inside rims of two sides thereof individually so as to house the multiple steel balls 32 , and the two fourth grooves 1601 stack with the third grooves 1704 of the circular partition 17 individually. As illustrated in FIG. 5E , the pressure rotating base 70 has a fifth groove 7001 defined inside a rim of a side thereof so as to house the multiple steel balls 32 , and the fifth groove 7001 stacks with the two fourth grooves 1601 of the pressure rotating disc 16 , wherein the pressure rotating disc 16 has a first trough 1602 defined on a central aperture thereof.

With reference to FIGS. 1-4 and 6 , each of the two main-cylinder devices a 2 includes a main-cylinder 19 , a first piston 77 , a piston ring 106 , and a first bushing 78 .

Referring to FIGS. 1-4 and 7 , the holder device a 3 includes a first coupling shaft 21 , a first bearing 82 , a first fitting tube 90 , a second bearing 91 , a third bearing 89 , a second fitting tube 88 , a fourth bearing 83 , a third fitting tube 87 , a second coupling shaft 80 , a fifth bearing 86 , a rotational base 85 , a sixth bearing 79 , a driving arm 84 , a third coupling shaft 20 , a first positioning pin 33 , a second positioning pin 39 , and a first fixing seat 81 .

Referring to FIGS. 1-4 and 8 , each of the two main-crankshaft devices a 4 includes two symmetrical shells 96 , two seventh bearings 92 , a main-cylinder crankshaft 24 , a fourth coupling shaft 25 , a first connection rod 94 , a first piston pin 95 , two oil seals 34 , two stop rings 35 retained on the two oil seals 34 respectively, a cylinder cam 29 , an eighth bearing 93 , and two bevel gears 5 .

As shown in FIGS. 1-4 and 9 , each of the two recycle-valve devices a 5 includes a valve 48 , a valve positioning sleeve 43 , a C-shaped retainer 44 , a valve base 45 , a first spring 42 , a valve shell 105 , a spring upper cap 41 , and two crescent retainers 40 .

As illustrated in FIGS. 1-4 and 10 , each of the two swing-arm devices a 6 has a ninth bearing 11 , two tenth bearings 98 , two eleventh bearings 99 , an adjustable screw 100 , a straight bearing 31 , and each recycle-valve swing-arm 23 .

With reference to FIGS. 1-4 and 11 , each of the two movable-valve devices a 7 includes a second fixing seat 101 , two movable valves 12 , two second springs 103 , a valve pin 102 , and a cylinder connecting base 104 .

Referring to FIGS. 1-4 and 12 , each of the two recycle-cylinder devices a 8 includes a first recycle-cylinder base 63 , a C-shaped retainer 64 , a second bushing 59 , two first linear bearings 69 , a protective sleeve 67 , two thrust bearings 68 , an accelerator 61 , two O-shaped oil rings 65 , an oil tank 97 , a second piston 53 , two second linear bearings 66 , a third positioning pin 62 , and a third spring 60 .

As shown in FIGS. 1-4 and 13 , each of the two recycle-crankshaft devices a 9 includes an air vent 28 , a first shell 51 , two twelfth bearings 52 , a first central shaft 6 , an auxiliary crankshaft 55 , a second connection rod 58 , a second shell 54 , an oil seal cap 38 , a second piston pin 56 , and a second recycle-cylinder base 57 .

As illustrated in FIGS. 1-4 and 14 , each of the two umbrella-shaped gear devices a 10 includes two bevel gears 5 , two thirteenth bearings 98 , a drive cam 9 , and a second central shaft 10 .

With reference to FIGS. 3 and 4 , before assembling the low-energy and high pressure, hydraulic, pneumatic engine, the casing device a 1 and multiple first and second connecting screws 37 , 49 are connected together, as shown in FIG. 5A . The main-cylinder device a 2 is connected as shown in FIG. 6 . The holder device a 3 is connected together as illustrated in FIG. 7 . The two main-crankshaft devices a 4 and a plurality of first screws (not shown) are screwed with multiple threaded apertures 36 individually, as illustrated in FIG. 8 . The two recycle-valve devices a 5 and multiple second screws are joined together, as shown in FIG. 9 . The two swing-arm devices a 6 are connected together, as shown in FIG. 10 . The two movable-valve devices a 7 are connected together, as shown in FIG. 11 . The two recycle-cylinder devices a 8 are coupled together, as illustrated in FIG. 12 . The two recycle-crankshaft devices a 9 and multiple screws (not shown) are coupled together, as illustrated in FIG. 13 . The two umbrella-shaped gear devices a 10 are joined together, as shown in FIG. 14 .

Referring further to FIGS. 1-4 and 5A , two main-cylinder devices a 2 are accommodated below the switch base 74 of the casing device a 1 and are connected to two fifth orifices 7402 beside two sides of the switch base 74 , and two first connection rods 94 of the two main-crankshaft devices a 4 (as shown in FIG. 8 ) are connected with two first pistons 77 of the two main-cylinder devices a 2 (as shown in FIG. 6 ) by way of two first piston pins 95 and multiple screws (not shown) respectively, hence the two main-crankshaft devices a 4 are fixed below the two main-cylinder devices a 2 individually, two fourth coupling shafts 25 are mounted on central positions of the two main-cylinder crankshafts 24 respectively, and two bevel gears 5 are secured on two ends of the two fourth coupling shafts 25 respectively, wherein one of the two bevel gears 5 (as shown in FIG. 4 ) is fixed on one of the two fourth coupling shafts 25 located on one surface of a left side of the main-cylinder crankshaft 24 . The holder device a 3 is defined on a middle portion between the two main-cylinder devices 19 and is connected on the switch base 74 of the casing device a 1 , as shown in FIGS. 3 and 5A , thereafter the rotational base 85 is screwed in a first central hole 7401 of the switch base 74 (as shown in FIGS. 7 and 15 ), wherein three connection parts are coupled together in a central position of the rotational base 85 , one of the three connection parts is: after the second bearing 91 and the first bearing 82 are housed in two second orifices of two ends of the first fitting tube 90 , the first coupling shaft 21 is fitted in the first fitting tube 90 ; another of the three connection part is: after the third bearing 89 and the fourth bearing 83 are accommodated in two third orifices of two ends of the second fitting tube 88 , the second coupling shaft 80 is fitted in the second fitting tube 88 ; the of the three connection parts is: after the sixth bearing 79 and the fifth bearing 86 are retained in two fourth orifices of two ends of the third fitting tube 87 , the third coupling shaft 20 is fitted in the third fitting tube 87 . Thereafter, the first connection part is fitted in the second connection part, and the second connection part and the first connection part are fitted in the third connection part, thus assembling central position of the rotational base 85 , as shown in FIG. 15 . With reference to FIG. 3 , the driving arm 84 and the bevel gear 5 extends over the rotational base 85 (as illustrated in FIG. 3 ), wherein a second troughs 8401 of the driving arm 84 are mounted beside a first side of the third coupling shaft 20 by using the first positioning pin 33 (as shown in FIGS. 5A, 7 and 15 ), and the third coupling shaft 20 includes a third trough 2001 defined on a second side thereof and retained with the second positioning pin 39 , the second side of the third coupling shaft 20 is retained on a fourth trough 1802 of a second central hole 1803 of the pressure switch disc 18 by way of the second positioning pin 39 (as illustrated in FIG. 5C ), hence the driving arm 84 rotates to drive the pressure switch disc 18 to rotate through the third coupling shaft 20 , and the multiple steel balls 32 around the pressure switch disc 18 (as shown in FIG. 5C ) roll to drive the driving arm 84 so that the driving arm 84 rotate the pressure switch disc 18 easily, thus starting the pressure switch disc 18 switch based on using requirements (i.e., the second central hole 1803 of the pressure switch disc 18 , the two fifth orifices 7402 of the switch base 74 , the first orifice 7103 of the switch disc 71 , and a seventh orifice 1703 of the circular partition 17 are at a central axis), or is on an off state (i.e., the second central hole 1803 of the pressure switch disc 18 , the two fifth orifices 7402 of the switch base 74 , the first orifice 7103 of the switch disc 71 , and the seventh orifice 1703 of the circular partition 17 are is on a crossing position of 90 degrees). The bevel gear 5 is connected with the bevel gear 5 on one side of a right-side main-cylinder crankshaft 24 , as shown in FIG. 3 . Referring to FIGS. 5A and 15 , the switch disc 71 , the pressure switch disc 18 , the circular partition 17 , the pressure rotating disc 16 , the pressure rotating base 70 , and the switch cap 14 are stacked together and are accommodated in the switch base 74 by way of multiple first connecting screws 37 (as shown in FIG. 15 ). After the switch fitting sleeve 73 is fixed in the first orifice 7103 of the switch disc 71 , multiple fifth screws (not shown) screw the switch disc 71 on a bottom of the switch base 74 . A protrusion 1702 of the circular partition 17 is screwed on a platform 7403 of the switch base 74 by using the multiple first connecting screws 37 (as shown in FIG. 15 ). The pressure switch disc 18 rotates between the switch disc 71 and the circular partition 17 (because the multiple steel balls 32 and multiple peripheral grooves are arranged between the switch disc 71 and the pressure switch disc 18 , and the switch disc 71 stacks with the pressure switch disc 18 ). The pressure rotating disc 16 rotates 360 degrees between the circular partition 17 and the pressure rotating base 70 . When the holder device a 3 is connected on the switch base 74 of the casing device a 1 , a first end of the first coupling shaft 21 of the rotational base 85 is connected with the bevel gear 5 (as shown in FIG. 3 ), a second end of the first coupling shaft 21 is connected with the pressure rotating disc 16 by using the connection tube 72 via the switch disc 71 , the pressure switch disc 18 , and the circular partition 17 and abuts against a slot 7002 on a center of the pressure rotating base 70 , hence the first coupling shaft 21 drives the pressure rotating disc 16 to rotate 360 degrees. The two main-cylinder 19 and the rotational base 85 are screwed on the switch base 74 of the casing device a 1 , wherein the casing device a 1 includes other parts (as shown in FIG. 5A ) so that when a first end of the casing device a 1 is screwed on the switch base 74 by way of the second connecting screws 49 , a second end of the casing device a 1 accommodates the pressure disc 27 and the two movement posts 2 and is screwed with the pressure groove cap 75 , wherein each of the two movement posts 2 has an air hole 30 formed outside the pressure groove cap 75 , and the pressure gauge 76 is fixed on one side of the pressure groove cap 75 (as illustrated in FIG. 4 ). Furthermore, a hydraulic tank 13 is defined in the casing device a 1 below the pressure disc 27 , and a pressure tank 3 is defined in the casing device a 1 above pressure disc 27 . The two swing-arm devices a 6 are arranged on sides of a lower end of the two main-cylinder devices a 2 (as shown in FIGS. 3 and 10 ), wherein a ninth bearing 11 of the two swing-arm devices a 6 is mounted on the second central shaft 10 , and the bearing 11 of the two swing-arm devices a 6 is fixed on the fourth coupling shaft 25 . Each of the two main-cylinder devices a 2 has a sixth orifice 1901 defined on one side thereof and connects with each of the two recycle-valve devices a 5 (as illustrated in FIGS. 3, 6, and 9 ), and an outlet end of each recycle-valve device a 5 is coupled with each movable-valve device a 7 (as shown in FIG. 11 ). The adjustable screw 100 is located on a right side of each recycle-valve device a 5 and has each swing-arm 23 , and the each swing-arm 23 corresponds to each recycle-valve device a 5 to rotate, wherein each swing-arm 23 intermittently presses and releases the adjustable screw 100 by way of the cylinder cam 29 on each fourth coupling shaft 25 . Each movable-valve device a 7 is coupled with each recycle-cylinder device a 8 (as shown in FIG. 12 ), and an outlet end of each recycle-cylinder devices a 8 is joined with the six body 57 and each recycle-crankshaft device a 9 (as illustrated in FIG. 13 ), wherein the six body 57 is applied to fix the second central shaft 10 . Each recycle-crankshaft device a 9 has the air vent 28 defined a first end thereof and its right-angle end opposite to the first end connects with a first end of the first central shaft 6 , and a second end of the first central shaft 6 is connected with another bevel gear 5 which joins with the umbrella-shaped gear device a 10 (as shown in FIG. 14 ). Each umbrella-shaped gear device a 10 includes the drive cam 9 arranged on a top thereof and rotating relative to an operation arm 8 of each recycle-cylinder device a 8 . Each umbrella-shaped gear device a 10 includes another bevel gear 5 arranged on a bottom thereof and connecting with the bevel gear 5 on the two fourth coupling shafts 25 .

With reference to FIGS. 1-4 , in operation, two operation structures (i.e., a right-side operation structure and a left-side operation structure) opposite to each other form in the low-energy and high pressure, hydraulic, pneumatic engine. The right-side operation structure includes the right-side main-crankshaft devices a 4 , one of the two main-cylinder devices a 2 , one of the two fourth coupling shafts 25 , one of the two recycle-crankshaft devices a 9 , one of two first central shafts 6 of the two recycle-crankshaft devices a 9 , one of the two recycle-cylinder devices a 8 , one of the two operation arms 8 , one of the two movable-valve devices a 7 , one of the two recycle-valve devices a 5 , one of the two swing-arm devices a 6 , one of two cams 9 of the two umbrella-shaped gear devices a 10 , one of the two umbrella-shaped gear devices a 10 , and the bevel gear 5 . The left-side operation structure includes the left-side main-crankshaft devices a 4 , the main-cylinder device a 2 , the fourth coupling shaft 25 , the recycle-crankshaft device a 9 , the first central shaft 6 , the recycle-cylinder device a 8 , the operation arm 8 , the movable-valve device a 7 , the recycle-valve device a 5 , the swing-arm 23 , the drive cam 9 , the umbrella-shaped gear device a 10 , and the bevel gear 5 , wherein the right-side operation structure is opposite to the left-side operation structure.

In operation (as shown in FIGS. 1-4 ) of the right-side operation structure of the low-energy and high pressure, hydraulic, pneumatic engine, the driving arm 84 rotates so as to drive the third coupling shaft 20 , and the third coupling shaft 20 actuates the pressure switch disc 18 to revolve so that the second central hole 1803 of the pressure switch disc 18 communicates with one fifth orifice 7402 of the switch base 74 , the first orifice 7103 of the switch disc 71 , and the seventh orifice 1703 of the circular partition 17 at the same central axis position. In the meantime, high-pressure air inputs into the pressure tank 3 of the case 26 from a pressure aperture 1 so as to push the pressure disc 27 to move downwardly, and the pressure disc 27 forces hydraulic oil in the hydraulic tank 13 to flow downwardly and to push the pressure rotating disc 16 to rotate 360 degrees via first openings of the switch cap 14 and two second through apertures 7003 of the pressure rotating base 70 (as show in FIGS. 5A and 15 ) so that an eighth orifice 1603 connects with the seventh orifice 1703 of the circular partition 17 (as shown in FIG. 5A ), and the hydraulic oil flows into a right-side main-cylinder 19 in FIG. 4 . When the first piston 77 in the right-side main-cylinder 19 is located at a highest position (i.e., the piston ring 106 is located below a peripheral side of the sixth orifice 1901 ) and is about to move downwardly, the pressure rotating disc 16 turns on synchronously so that the hydraulic oil is pushed by the pressure disc 27 to flow into the right-side main-cylinder device a 2 of the right-side operation structure via the circular partition 17 , the pressure switch disc 18 , the switch disc 71 , and the switch base 74 , hence the first piston 77 in the right-side main-cylinder 19 is driven to move downwardly and to actuate the right-side main-cylinder device a 2 to actuate the right-side main-crankshaft device a 4 simultaneously, also the right-side main-crankshaft device a 4 actuates the fourth coupling shafts 25 to drive the bevel gear 5 . Thereafter, the bevel gear 5 drives the first coupling shaft 21 to revolve synchronously and to actuate the pressure rotating disc 16 to rotate 360 degrees.

When the first piston 77 in the right-side main-cylinder device 19 is about to move downwardly, the pressure rotating disc 16 turns on synchronously so that the second piston 53 in the right-side recycle-cylinder device a 8 is about to move downwardly from the highest position and is full of the hydraulic oil, and the operation arm 8 of the right-side recycle-cylinder device a 8 is driven by the drive cam 9 to turn on, hence the of two accelerators 61 in the right-side recycle-cylinder device a 8 turns on (i.e., a first elongate hole 6101 on the accelerate 61 , a first elongated hole 6701 of the protective sleeve 67 , and a second elongated hole 5901 of the second bushing 59 are at the same position, as shown in FIG. 12 ).

Thereby, when the pressure rotating disc 16 is about to turn on so that the hydraulic oil flows into the right-side main-cylinder device a 2 of FIG. 4 , the left-side operation structure opposite to the right-side operation structure operates, for example, the pressure rotating disc 16 on the left-side main-cylinder 19 operates reversely (i.e., the pressure rotating disc 16 turns off), the hydraulic oil does not flow into the left-side main-cylinder device a 2 , the first piston 77 in the left-side main-cylinder device a 2 is located at a lowest position, and the second piston 53 in the right-side recycle-cylinder device a 8 is located at the lowest position. In the meantime, the first piston 77 in the left-side main-cylinder device a 2 is full of the hydraulic oil, and the accelerator 61 in the recycle-cylinder device a 8 turns off after turning on.

Referring to FIGS. 4 and 6 , when the first piston 77 in the right-side main-cylinder device a 2 descends to the lowest position (the piston ring 106 is located below a ninth orifice 1902 ) from the highest position (i.e., the piston ring 106 is located below the peripheral side of the sixth orifice 1901 ), and the pressure disc 27 moves to the lowest position, hence the pressure rotating disc 16 turns off after turning on, and the hydraulic oil in the hydraulic tank 13 flows into the right-side main-cylinder device a 2 until the pressure rotating disc 16 turns off. Meantime, the hydraulic oil in the hydraulic tank 13 is isolated completely and does not flow into the right-side main-cylinder device a 2 , and air in the right-side main-cylinder device a 2 discharges out of the air vent 28 because the first piston 77 moves downwardly), hence the first piston 77 moves upward and downward smoothly.

When the first piston 77 in the right-side main-cylinder 19 descends to the lowest position (i.e., the piston ring 106 is located above the ninth orifice 1902 ) from the highest position (i.e., the piston ring 106 is located below the sixth orifice 1901 ), the pressure rotating disc 16 turns off. In the meantime, the second piston 53 of the right-side recycle-cylinder device a 8 moves to the lowest position from the highest position. During the second piston 53 moves to the lowest position, the accelerator 61 in the right-side recycle-cylinder device a 8 turns on because the drive cam 9 drives the operation arm 8 , hence the hydraulic oil in the right-side recycle-cylinder device a 8 flows into the hydraulic tank 13 via the accelerator 61 and a tenth orifice 2601 . Accordingly, when the second piston 53 of the right-side recycle-cylinder device a 8 descends to the lowest position from the highest position, the accelerator 61 in the right-side recycle-cylinder device a 8 turns off since the drive cam 9 drives the operation arm 8 , hence the right-side recycle-cylinder device a 8 separates from the hydraulic tank 13 , i.e., no resistance occurs in the right-side recycle-cylinder device a 8 , and the hydraulic oil in the hydraulic tank 13 is stopped flowing back to the right-side recycle-cylinder device a 8 , such that the hydraulic oil flows into the right-side recycle-cylinder device a 8 smoothly in a next stroke.

When the first piston 77 in the right-side main-cylinder device 19 descends to the lowest position (i.e., the piston ring 106 is located above the ninth orifice 1902 ) from the highest position (i.e., the piston ring 106 is located below the sixth orifice 1901 ), the pressure rotating disc 16 turns off. In the meantime, the second piston 53 of the recycle-cylinder device a 8 and the accelerator 61 descend to the lowest position simultaneously from the highest position, and the first piston 77 of the left-side recycle-cylinder device 7 and the accelerator 61 turn off. Thereafter, the first piston 77 of the left-side main-cylinder device 19 moves to the highest position from the lowest position, meanwhile, the pressure rotating disc 16 turns off so that a second opening 15 is closed. However, the swing-arm 23 operates by using the fourth coupling shaft 25 , during the first piston 77 of the lift-side recycle-cylinder 19 lifts upward so that the swing-arm 23 forces the recycle-valve device a 5 to turn on. In the meantime, the hydraulic oil in the left-side main-cylinder 19 enters into the left-side recycle-valve device a 5 during the first piston 77 moves upward so that the left-side swing-arm 23 forces the left-side recycle-valve device a 5 via the cylinder cam 29 of the fourth coupling shaft 25 , thus turning on the left-side recycle-valve device a 5 . In the meantime, the hydraulic oil in the left-side main-cylinder 19 enters into the left-side recycle-valve device a 5 during the first piston 77 moves upward so that the hydraulic oil in the left-side main-cylinder 19 produces a pressure to force the left-side movable-valve device a 7 of the left-side recycle-valve device a 5 to open, hence the hydraulic oil flows into the left-side recycle-cylinder device a 8 . Meantime, the second piston 53 of the left-side recycle-cylinder device a 8 lifts upwardly to the highest position from the lowest position. The airs discharge out of the air vent 28 of a lid 50 so that the second piston 53 moves upward and downward reciprocately. When the second piston 53 lifts upwardly, the airs discharge out of the air vent 28 of a lid 50 so that the second piston 53 moves upward and downward reciprocately. In the meantime, the accelerator 61 of the left-side recycle-cylinder device a 8 turns off to as to isolate the pressure so that zero-resistance exists in the left-side recycle-cylinder device a 8 , and the second piston 53 of the left-side recycle-cylinder device a 8 operates and the accelerator 61 turns off after the right-side main-cylinder 19 actuates the left-side main-cylinder crankshaft 24 and the fourth coupling shaft 25 of the right-side main-crankshaft devices a 4 to rotate. The bevel gear 5 actuates the left-side second central shaft 10 to drive the left-side cylinder cam 9 so that the left-side operation arm 8 is driven by the left-side cylinder cam 9 to turn off the accelerator 61 of left-side recycle-cylinder device a 8 , and the left-side second central shaft 10 drives the left-side first central shaft 6 via the bevel gear 5 simultaneously, hence the left-side recycle-crankshaft device a 9 drives the second piston 53 of the left-side recycle-cylinder device a 8 to move upwardly, and the hydraulic oil in nest stroke flows into the recycle-cylinder device a 8 smoothly.

As the first piston 77 of the right-side main-cylinder 19 lifts upward from the lowest position, the pressure disc 27 press downwardly, and the pressure rotating disc 16 turns off.

When the first piston 77 of the right-side main-cylinder device a 2 moves upwardly, the pressure rotating disc 16 turns off, the second piston 53 of the right-side recycle-cylinder device a 8 lifts upward synchronously, and the accelerator 61 of the right-side recycle-cylinder device a 8 turns on.

When the first piston 77 of the right-side main-cylinder device a 2 moves upwardly, the pressure rotating disc 16 turns off, hence the left-side operation structure opposite to the right-side operation structure starts operation. For example, the first piston 77 of the left-side main-cylinder device a 2 moves downwardly from the highest position (i.e., the piston ring 106 is located below the sixth orifice 1901 ), and the pressure rotating disc 16 turns on.

When the first piston 77 of the right-side main-cylinder device a 2 lifts upward to the highest position, the pressure rotating disc 16 turns off so as to close the right-side second opening 15 and to drive the right-side swing-arm 23 . When the first piston 77 of the right-side main-cylinder device a 2 lifts upwardly (i.e., the piston ring 106 is located above the ninth orifice 1902 ), the right-side swing-arm 23 is driven by the cylinder cam 29 to force the right-side recycle-valve device a 5 so that the right-side recycle-valve device a 5 opens, meanwhile, the hydraulic oil in the right-side main-cylinder device a 2 flows into the right-side recycle-valve device a 5 , when the first piston 77 lifts upwardly, hence the hydraulic oil in the recycle-valve device a 5 produces the pressure, and the pressure forces the movable-valve device a 7 of the recycle-valve device a 5 to open so that the hydraulic oil flows into the right-side recycle-cylinder device a 8 .

When the first piston 77 of the right-side main-cylinder device a 2 lifts upward to the highest position (i.e., the piston ring 106 is located below the sixth orifice 1901 ) again from the lowest position (i.e., the piston ring 106 is located above the ninth orifice 1902 ), the pressure rotating disc 16 turns off. In the meantime, the second piston 53 of the right-side recycle-cylinder device a 8 moves upwardly from the highest position, and the accelerator 61 of the right-side recycle-cylinder device a 8 turns off, wherein the second piston 53 of the right-side recycle-cylinder device a 8 operates and the accelerator 61 closes after the right-side main-cylinder device a 2 drives the right-side main-crankshaft devices a 4 , and actuates the fourth coupling shaft 25 of the right-side main-crankshaft devices a 4 to revolve, and the bevel gear 5 drives the right-side umbrella-shaped gear device a 10 to rotate, and the right-side umbrella-shaped gear device a 10 drives the drive cam 9 so that the right-side operation arm 8 is driven by the drive cam 9 , so that the accelerator 61 in the right-side recycle-cylinder device a 8 turns off, the right-side second central shaft 10 drives the first central shaft 6 by using the bevel gear 5 so that the right-side recycle-crankshaft device a 9 actuates the second piston 53 of the right-side recycle-cylinder device a 8 to move upward synchronously.

When the first piston 77 of the right-side main-cylinder device a 2 lifts upward to the highest position, the pressure rotating disc 16 turns off so that the right-side second opening 15 closes. Thereafter, the first piston 77 of the left-side main-cylinder device a 2 descends to the lowest position (i.e., the piston ring 106 is located above the ninth orifice 1902 ) from the highest position (i.e., the piston ring 106 is located below the sixth orifice 1901 ), and the pressure rotating disc 16 opens so that the left-side second opening 15 turns on. Meanwhile, the hydraulic oil in the hydraulic tank 13 flows into the left-side main-cylinder device a 2 again, hence the left-side operation structure finishes operation in the first stroke.

After the first piston 77 of the right-side main-cylinder device a 2 lifts to the highest position (i.e., the piston ring 106 is located below the sixth orifice 1901 ), the pressure rotating disc 16 is about to turn on, and the right-side swing-arm 23 turns off automatically and simultaneously, the movable-valve device a 7 closes automatically and simultaneously so as to stop the right-side main-cylinder device a 2 communicating with the recycle-cylinder device a 8 . Due to the first piston 77 of the right-side main-cylinder device a 2 moves to the highest position (i.e., the piston ring 106 is located below the sixth orifice 1901 ), the hydraulic oil flowing through the right-side recycle-valve device a 5 and the right-side movable-valve device a 7 is inputted into the recycle-cylinder device a 8 by the second piston 53 of the right-side recycle-cylinder device a 8 quickly, hence the right-side operation structure finishes operation in the first stroke.

When the first piston 77 of the right-side main-cylinder device a 2 operates in a second stroke, i.e., the first piston 77 of the right-side main-cylinder device a 2 descends, so that the pressure rotating disc 16 opens to flow the hydraulic oil in the hydraulic tank 13 into the right-side main-cylinder device a 2 , the second piston 53 of the right-side recycle-cylinder device a 8 descends synchronously, wherein the accelerator 61 in the recycle-cylinder device a 8 turns on automatically so that the hydraulic oil in the recycle-cylinder device a 8 in the first stoke flows back to the hydraulic tank 13 via the tenth orifice 2601 .

After the low-energy and high pressure, hydraulic, pneumatic engine operates in turn, four bevel gears 5 on four corners of FIG. 3 , connect with the shafts respectively, thus transmitting power and torque of the low-energy and high pressure, hydraulic, pneumatic engine to required operating parts.

Thereby, the low-energy and high pressure, hydraulic, pneumatic engine produces communication of low pressure and low-energy and high pressure, and circulation space of fluid operation, wherein the communication of low pressure and high pressure means behind the symmetrical shell of the first piston and the second shell of the second piston, and include the air vents communicating with a conduit configured to discharge the air, the hydraulic oil is in front of the first and second pistons, so the high pressure is in front of the pistons, and the conduit communicating with the air vents of the cylinders, so the low pressure forms behind the first and second pistons. Wherein the circulation space of the fluid operation represents that when the second piston retracts to the lowest position from the high position, the accelerator is closed so as to isolate the pressure. In the meantime, the recycle-cylinder is in no-pressure state, wherein during the second piston retracts to the lowest position from the high position, the circulation space of the fluid operation produces.

Accordingly, the low-energy and high pressure, hydraulic, pneumatic engine has following advantages:

1. The low-energy and high pressure, hydraulic, pneumatic engine operates without using gasoline or diesel, thus avoiding discharge of harmful substance or gas and pollution.

2. The low-energy and high pressure gas forces the hydraulic oil without using gasoline or diesel so as to start the low-energy and high pressure, hydraulic, pneumatic engine, and the hydraulic oil recycles and reuses repeatedly, thus obtaining environmental protection.

3. The low-energy and high pressure gas forces the hydraulic oil so as to circulate the hydraulic oil, and the communication of the low-energy and high pressure and the low pressure matches with the circulation space of the fluid operation to produce the torque, hence four strokes of intake, compression, combustion and exhaust the air are not required, i.e., burning the fuel oil by using the crankshafts and turning on/off the valves.

4. The low-energy and high pressure, hydraulic, pneumatic engine rotates 360 degrees, the two main-cylinder devices revolves 180 degrees so that the low-energy and high pressure, hydraulic, pneumatic engine operates and switches pressure time, the two main-cylinder devices are in no-pressure state, wherein in the non-switching, the low-energy and high pressure, hydraulic, pneumatic engine rotates in the low-energy and high pressure.

5. The low-energy and high pressure, hydraulic, pneumatic engine starts/stops operation by turning on the driving arms.

While various embodiments in accordance with the present invention have been shown and described, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.