Methods and systems for assisted direct start control
AssigneeFord Global Technologies, LLC
InventorsFelix Nedorezov, Hong Jiang, Davor David Hrovat, Alex O'Connor Gibson
Life of this patent
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Abstract
Methods and systems are provided for reducing audible clunks and objectionable drive feel in vehicles including start/stop systems. In one example, a vehicle engine is shutdown during vehicle coasting. The vehicle engine is then restarted, while the vehicle is moving with a torque converter clutch disengaged. A transmission clutch pressure is then adjusted during the restart based on a torque converter output speed relative to a torque converter input speed.
Claims9
A method of operating a vehicle engine having a torque converter and an automatic transmission, each with a clutch, comprising:
- during a vehicle moving condition,
- spinning down the engine to rest;
- and
- during a starter-assisted restart from the rest, and while the torque converter clutch is disengaged, adjusting a degree of transmission clutch engagement based on torque converter output speed relative to torque converter input speed.
Dependencies are inferred from the claim text.