Main pump to auxiliary pump hand-off strategy for maintaining hydraulic pressure in hybrid transmission
US8738206B2 · kind B2 · utility
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1References
20Claims
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Key dates
| Filing date | Jan 6, 2012 |
| Grant date | May 27, 2014 |
| Priority date | — |
| Expiry date | Jul 1, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/62
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method and system of providing hydraulic pressure during a transition from gas-powered engine operation to electric motor operation in a hybrid electric vehicle. During the transition, main pressure arising from operation of a gas-powered engine with a main pump is matched with auxiliary pressure arising from operation of a battery-powered electric motor with an auxiliary pump. After matching the main and auxiliary pressures, the auxiliary pressure is boosted to an operational pressure in response to a triggering event.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.