Patent ID: 8653704
Filing Date: 2014-02-18
Classification: B60K,H02K

Abstract:
1. A vehicle drive system comprising: a dynamo electric machine; and a case that accommodates the dynamo electric machine, wherein the case is disposed on at least one axial side with respect to the dynamo electric machine, and includes a wall portion overlapping the dynamo electric machine which has a section that overlaps with the dynamo electric machine as viewed from the axial direction, wherein the wall portion overlapping the dynamo electric machine includes a supply flow passage through which lubricating-cooling fluid flows, and which is formed with a first supply portion that is a portion supplying lubricating-cooling fluid to a rotor support bearing that supports a rotor of the dynamo electric machine, the first supply portion includes a throttle portion whose flow passage cross-sectional area is small compared to an upstream-side flow passage cross-sectional area in the flow direction of lubricating-cooling fluid, the supply flow passage includes a second supply portion that is a portion supplying lubricating-cooling fluid to the dynamo electric machine and higher than the first supply portion, the supply flow passage includes an open flow passage portion that has an opening portion, and a closed flow passage portion whose periphery is closed, wherein the closed flow passage portion communicates with the open flow passage portion on the upstream side of the flow direction of lubricating-cooling fluid, and communicates with the first supply portion on the downstream side of the flow direction of lubricating-cooling fluid, and a lowermost portion of the opening portion is the second supply portion.