Oil pressure supply device for vehicle drive system
US6253137A · kind A · utility
28Cited by
10References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 24, 1998 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Dec 24, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S903/945
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An engine and a motor are connected to the drive wheels of a vehicle via an automatic transmission. The drive wheels are driven using one of or both of the motor and the engine depending on the running state. The automatic transmission varies the drive ratio by the discharge pressure of the oil pressure pump. The oil pressure pump is driven by a second motor. When the automatic transmission is varying the drive ratio, the discharge of the oil pressure pump is increased by increasing the rotational speed of the second motor and thus the required oil for varying the drive ratio is maintained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.