Hydraulic control apparatus of transmission
US7819768B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 10, 2007 |
| Grant date | Oct 26, 2010 |
| Priority date | — |
| Expiry date | Aug 27, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/62
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A hydraulic control apparatus for a transmission includes a line pressure regulating device that enables control in which an oil pressure from an oil pump is regulated so as to attain a line pressure, and that enables control in which the line pressure is switched stepwise between a low pressure state in a lower pressure range and a high pressure state in a higher pressure range; a plurality of hydraulic servos that engage and disengage friction engaging elements using engagement pressures that are based on the line pressure; and a high pressure state detecting device that detects that the line pressure regulating device is outputting the line pressure in the high pressure state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.