Pressure-regulating valve having an electrical control unit

This application claims the benefit and priority of German Patent Application No. DE 10 2013 005 478 filed on Mar. 28, 2013. The entire disclosure of the above application is incorporated herein by reference.

The present disclosure relates to a pressure-regulating valve having an electrical control unit.

This section provides background information related to the present disclosure which is not necessarily prior art.

Electrical control units for hydraulic valves that are to be fastened and connected to the valve by means of a plug connector are known for example from the protective right DE 10 2009 029 764 A1, in addition the protective right DE 10 2011 122 363 A1 discloses an electrical control unit in a plug device.

This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all of its features.

The present disclosure renders it possible to use a pluggable, electrical control unit for the purpose of supplying two electromagnets and consequently to render it possible to reduce the costs of the entire device. Alternatively, the same electrical control unit renders possible the forwarding of electrical signals and the supply of energy to additional electrical devices and consequently reduce the outlay for the cabling.

By virtue of the fact that the electrical control unit is equipped with three plug connectors and with suitable hardware and software, the electrical control unit can control two pressure-regulating valves, one valve to which said electrical control unit is connected mechanically and by way of a plug connector without a cable, and an additional valve to which said electrical control unit is connected by way of a cable.

These two pressure-regulating valves are generally used jointly to control a direction-control valve or a variable displacement pump. For this purpose, a higher-priority controller or a signal generator provides a common digital signal by way of a data bus to the electrical control unit.

An improvement of the described arrangement resides in the fact that without changing its circuitry the electrical control unit can also be used in a different configuration merely by means of different programming, in particular with the forwarding of control signals and with the supply of electrical energy to a different electrical device. Said electrical device can also comprise one or several sensors that send feedback signals regarding the status of the controlled system back to the higher-priority controller. It is consequently possible also to construct closed control loops and monitored control units.

The described arrangement comprising a pressure-regulating valve and an electrical control unit can also be used in electro-hydraulic feedforward controllers of direction-control valves, variable hydraulic pumps and variable hydraulic motors, and in vehicular work machines.

Further areas of applicability will become apparent from the description provided herein. The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.

The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.

FIG. 1 illustrates the pressure-regulating valve having an electrical control unit;

FIG. 2 illustrates an arrangement of two pressure-regulating valves and one electrical control unit; and

FIG. 3 illustrates a system having a pressure-regulating valve, an electrical control unit and an additional electrical device.

Corresponding reference numerals indicate corresponding parts throughout the several views of the drawings.

Example embodiments will now be described more fully with reference to the accompanying drawings.

A pressure-regulating valve 1 , is illustrated in FIG. 1 , connected to an electrical control unit 2 by means of a first plug connector 3 , wherein the electrical control unit 2 controls the pressure-regulating valve 1 using a regulated current signal.

The electrical control unit 2 comprises two additional plug connectors 4 and 5 , the electrical control unit 2 is supplied with electrical energy 20 by way of a second plug connector 4 and a signal-carrying connection is produced, preferably by means of a data bus 21 , to a higher-priority controller 6 or to a set-point generator 7 , as shown in FIG. 2 and FIG. 3 , respectively.

A third plug connector 5 connects the electrical control unit 2 to one or several bus-compatible electrical devices 8 or to an additional pressure-regulating valve 9 without a dedicated electrical control unit, as shown in FIG. 2 and FIG. 3 , respectively. Wherein the bus-compatible electrical device 8 may be a pressure regulating valve 9 .

The electrical control unit 2 is equipped and programmed so that it can as necessary control a second pressure-regulating valve 9 (see FIG. 2 ) using a regulated current signal.

It is preferred that the pressure-regulating valves 1 and 9 that are connected to the electrical control unit 2 jointly control in a feedforward manner a direction-control valve 10 , as illustrated in FIG. 2 .

Alternatively, the electrical control unit 2 is equipped and programmed so that the third plug connector 5 forwards both the signals, which are received by way of the first plug connector 3 , and also the electrical energy for additional devices.

The signal-carrying connection 21 to the higher-priority controller 6 is advantageously embodied as a CAN bus 21 by way of the second plug connector 4 and the forwarding is also performed by way of the third plug connector 5 as a CAN bus 21 .

Alternatively, a set-point generator 7 is connected by way of the second plug connector 4 and a CAN bus 21 and the forwarding is also performed by way of the third plug connector 5 as a CAN bus 21 , wherein electrical energy 20 is also supplied by way of the second plug connector 4 to the electrical control unit 2 , to the set-point generator 7 and as necessary to additional CAN bus-compatible connecting devices.

In a further development of the disclosure, as illustrated in FIG. 3 , a CAN bus-compatible electrical device 8 is connected by way of the third plug connector 5 , which device is for example an additional electrical control unit for an additional pressure-regulating valve, or a CAN bus-compatible electrical device that comprises a sensor 11 that monitors the pressure-regulating valve 1 or monitors the direction-control valve 10 that is controlled in a feedforward manner by the pressure-regulating valve 1 .

In a different further development of the disclosure, a CAN bus-compatible electrical device 8 is connected by way of the third plug connector 5 , which device comprises an electrical monitoring device 12 that, by means of one sensor or several sensors 11 , monitors a machine 13 that is influenced by the direction-control valve 10 that is controlled in a feedforward manner.

The second plug connector 4 and the third plug connector 5 comprise in each case six contacts: four of each six contacts being used for the CAN bus 21 , and in the case of the second plug connector 4 , two for the supply of electrical energy 20 , and in the case of the third plug connector 5 , two either for the supply of electrical energy to additional devices or for the transmission of current signals to an electromagnetic actuator for a second pressure-regulating valve 9 .

The electrical control unit 2 is embodied with two printed circuit boards 14 and 15 , of which one comprises a micro-controller 22 and another comprises the electronic switches 23 for higher electrical currents.

The plug contacts 19 of the plug connectors 3 , 4 and 5 are connected by means of soldering to the printed circuit board 15 that also comprises the electronic switches 23 .

The electrical control unit 2 is received in a housing 16 that comprises on the side the pressure-regulating valve 1 , and is fastened together with said pressure-regulating valve 1 by means of fastening screws 17 to a device 18 .

1 . Pressure-regulating valve

2 . Electrical control unit

3 . First plug connector

4 . Second plug connector

5 . Third plug connector

6 . Higher-priority controller

7 . Set-point generator

8 . Electrical device

9 . Second pressure-regulating valve

10 . Direction-control valve

11 . Sensor

12 . Monitoring device

13 . Machine

14 . First printed circuit board

15 . Second printed circuit board

16 . Housing

17 . Fastening screw

18 . Device

19 . Plug contact

20 . Electrical energy supply

21 . CAN bus

22 . Micro-controller

23 . Electronic switch

The foregoing description of the embodiments has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same may also be varied in many ways. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.