Energy storage system for a hybrid vehicle
US7913791B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2009 |
| Grant date | Mar 29, 2011 |
| 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
An energy storage system for a hybrid vehicle, with an internal combustion engine having an output shaft, includes a reservoir containing working fluid, a reversible pump/motor in fluid communication with the reservoir, and an accumulator containing working fluid and gas. The accumulator is in selective fluid communication with the reversible pump/motor to deliver pressurized working fluid to the reversible pump/motor when operating as a motor, and to receive pressurized working fluid discharged by the reversible pump/motor when operating as a pump. The energy storage system also includes an electric motor having a rotor selectively coupled to the output shaft to transfer torque to the output shaft. The reversible pump/motor is coupled to the rotor to transfer torque to the rotor when operating as a motor, and to receive torque from the rotor when operating as a pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.