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US 9,809,212 B2Granted
Methods and system for launching a vehicle
AssigneeFord Global Technologies, LLC
InventorsChen Zhang, Rajit Johri, Ming Lang Kuang, Jeffrey Allen Doering, Xiaoyong Wang, Walter Joseph Ortmann, Felix Nedorezov, Alexander O'Connor Gibson
Life of this patent
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Abstract
Systems and methods for operating a hybrid vehicle driveline that includes an engine and a motor are presented. In one example, the systems and methods include one or more control modes where engine and/or motor speed or torque is adjusted responsive to different control parameters during a vehicle launch from zero speed or a creep speed.
Claims20
A driveline operating method, comprising:
- accelerating a torque converter impeller to a desired speed in response to release of a brake pedal;
- and
- maintaining a torque converter impeller speed at the desired speed in the presence of an increase in driver demand torque until a torque converter turbine speed is within a threshold speed of the torque converter impeller speed.
A driveline operating method, comprising:
- accelerating a torque converter impeller to a desired speed in response to a brake pedal release;
- maintaining a torque converter impeller speed at the desired speed until an increase in driver demand torque;
- entering a torque converter impeller torque control mode during a torque converter lockup clutch delay period;
- and
- entering a torque converter impeller speed control mode in response to the torque converter lockup clutch delay period elapsing.
2 more elements
A driveline, comprising:
- an engine;
- a motor;
- a transmission including a torque converter and a torque converter lockup clutch, the transmission coupled to the motor;
- and
- a controller including executable instructions stored in non-transitory memory for adjusting the torque converter lockup clutch in response to a virtual torque converter impeller speed that is different from an actual torque converter impeller speed.
2 more elements
Dependencies are inferred from the claim text.