Shift shock reducing apparatus for power train
US7695405B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 8, 2007 |
| Grant date | Apr 13, 2010 |
| Priority date | — |
| Expiry date | Aug 2, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W10/11
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A shift shock reducing apparatus for a power train having an engine and an automatic transmission having a frictional element that is to be engaged at upshift, comprising a control section that executes, during upshift, a torque down of the engine that starts before the start of an inertia phase in which a gear ratio of the transmission is changing from a before-shift gear ratio to an after-shift gear ratio, and a control section that makes larger a rising gradient of working oil pressure that is supplied to the frictional element to be engaged at upshift when the torque down that starts before the start of the inertia phase is executed than that when the torque down is not executed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.