Torque converter slip control based on motor torque during transient events
US8715136B1 · kind B1 · utility
23Cited by
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15Claims
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Assignee
Inventors
Key dates
| Filing date | Mar 14, 2013 |
| Grant date | May 6, 2014 |
| Priority date | — |
| Expiry date | Mar 14, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/62
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A hybrid vehicle with an engine, an electric drive motor and battery, an automatic transmission with a torque converter having a bypass clutch, and a powertrain controller dynamically adjust the torque converter slip to balance fuel economy and drivability during a transient torque request by using motor torque to satisfy the transient torque and applying feed forward control of the fluid pressure in the bypass clutch based on the motor torque and feedback control of the slip to maintain torque converter torque ratio substantially constant during the transient event.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.