A heat-generating portion cooling structure of vehicle drive apparatus that sufficiently supplies cooling oil to heat-generating portions to enhance efficiency of the vehicle drive apparatus when the heat-generating portions generate maximum heat includes drawing means for drawing oil in a case into a catch tank, and an oil circulation passage for circulating the oil through the catch tank while supplying the oil to first and second heat-generating portions. The oil circulation passage includes a first passage for the oil to flow to the first heat-generating portion when the oil surface in the catch tank is at a first height and a second passage for the oil to flow to the second heat-generating portion when the oil surface is at a second height lower than the first height, and more amount of oil flows to the second heat-generating portion than to the first heat-generating portion when the oil surface is low.

Claims

12 · 2 independent · depth 4

12 granted claims

›1.independentA heat-generating portion cooling structure comprising:ndrawing means for drawing oil stored in a case into a catch tank provided in the case; andan o…+10

›2.↳ 1A heat-generating portion cooling structure as set forth in claim 1, in which the first passage has a first opening opened on an inner wall surface of…d2+1

›4.↳ 1A heat-generating portion cooling structure as set forth in claim 1, in which the oil circulation passage further comprises a plurality of oil introdu…d2+1

›6.↳ 1A heat-generating portion cooling structure as set forth in claim 1, in which the oil circulation passage further comprises a plurality of oil introdu…d2+1

›8.↳ 1A heat-generating portion cooling structure as set forth in claim 1, in which the drawing means is operated to increase the drawing amount of oil to t…d2+2

›11.↳ 1A heat-generating portion cooling structure as set forth in claim 1, in which each of the heat-generating portions is constituted by an electric motor…d2

›12.independentA heat-generating portion cooling structure comprising:ndrawing means for drawing oil stored in a case into a catch tank provided in the case; andan o…

Classifications

4 codes

IPC · International Patent Classification

Section H — Electricity

H02K9/00

USPC · US Patent Classification

310/57310/54310/113

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Pendency

2.5 y

916 days filing → grant

Office actions

non-final + final

Responses

1 RCE

Examiner

Dang Le

art unit 2834 · TC 2800

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1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20120091836 A1	19 Apr 2012

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