Transmission hydraulic control system having an accumulator bypass valve assembly
US8887498B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 11, 2010 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | Aug 20, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/85986
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A system for providing pressurized hydraulic fluid includes a pump. A bypass valve assembly includes an inlet port in communication with the pump and an outlet port in communication with an accumulator. The pump and the accumulator are both in communication with a hydraulic control system that controls, lubricates, and cools a transmission of a motor vehicle. The bypass valve assembly has a valve moveable between at least a two positions. The bypass valve assembly is operable to bypass the accumulator when the vehicle is first started such that the pump charges the hydraulic control system before charging the accumulator. The accumulator provides pressurized hydraulic fluid to the hydraulic control system after vehicle start.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.