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US 10,029,670 B2Granted
System and method to prevent driveline float in lash region
AssigneeFord Global Technologies, LLC
InventorsRajit Johri, Ming Lang Kuang, Francis Thomas Connolly, Bernard D. Nefcy, Yanan Zhao, Fazal Urrahman Syed
Life of this patent
Estimating the term…
Abstract
A vehicle includes an engine and an electric machine coupled to a gearbox through a torque converter. The vehicle includes a controller programmed to command an engine torque and an electric machine torque to achieve a predetermined positive torque at the input of the torque converter when a driver demand torque at the torque converter input decreases to fall within a range between the predetermined positive torque and a predetermined negative torque.
Claims6
A powertrain control system comprising:
- an engine and an electric machine coupled to a gearbox through a torque converter;
- and
- a controller programmed to, in response to a driver demand torque at the torque converter being between an impeller stall torque of the torque converter and a predetermined negative torque and a torque at the torque converter being greater than the impeller stall torque, command the engine and the electric machine to cause the torque to be the impeller stall torque.
Dependencies are inferred from the claim text.