Hydraulic pressure supply control apparatus for automobile
US8568274B2 · kind B2 · utility
2Cited by
2References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2009 |
| Grant date | Oct 29, 2013 |
| Priority date | — |
| Expiry date | Jul 21, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2312/14
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In one embodiment, a hydraulic pressure control circuit (4) of an automatic transmission includes a mechanical oil pump (MOP) and an electrical oil pump (EOP). The discharge side of the electrical oil pump (EOP) is caused to be in communication with the direct upstream side of a hydraulic pressure servo of a first clutch (C1) via a shunt hydraulic pressure supply passage (430). At the time of idle reduction, a linear solenoid (411) on the upstream side of the first clutch (C1) is caused to enter a forced closure state, thus preventing oil from the electrical oil pump (EOP) from flowing to a manual shift valve (410) side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.