Invention Grant
- Patent Title: Parallel hybrid vehicle launch torque control
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Application No.: US15669686Application Date: 2017-08-04
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Publication No.: US10549747B2Publication Date: 2020-02-04
- Inventor: Thomas S. Hawley
- Applicant: Toyota Motor Engineering & Manufacturing North America, Inc.
- Applicant Address: US TX Plano
- Assignee: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.
- Current Assignee: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.
- Current Assignee Address: US TX Plano
- Agency: Sheppard, Mullin, Richter & Hampton LLP
- Agent Hector A. Agdeppa; Daniel N. Yannuzzi
- Main IPC: B60W20/40
- IPC: B60W20/40 ; B60W10/06 ; B60W10/08 ; B60W30/192 ; B60L53/24

Abstract:
System and methods are provided for improving launch performance of a hybrid vehicle. During a stall condition prior to launch, the engine of the hybrid vehicle can produce engine torque beyond a standard stall torque limit. Negative motor torque that offsets the increase in engine torque in accordance with the standard stall torque limit is produced by the motor. This results in loading the automatic transmission of the hybrid vehicle with additional torque that would otherwise not be possible. During a launch condition following the stall condition, the motor torque is dropped to 0 Nm, and the brakes are released, allowing the hybrid vehicle to accelerate. The full torque generated by the engine is provided to the automatic transmission and used to drive one or more wheels of the hybrid vehicle.
Public/Granted literature
- US20190039599A1 PARALLEL HYBRID VEHICLE LAUNCH TORQUE CONTROL Public/Granted day:2019-02-07
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