Torque distribution method, controller and vehicle under engine failure torque limit
By distributing the target drive torque of the motor and engine in hybrid vehicles according to the fault torque limiting level and preset torque limiting, the problem of reduced power performance caused by engine torque limiting is solved, and the overall vehicle economy is improved.
CN120096544BActive Publication Date: 2026-07-10WEICHAI POWER CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WEICHAI POWER CO LTD
- Filing Date
- 2025-02-26
- Publication Date
- 2026-07-10
AI Technical Summary
Technical Problem
During vehicle operation, engine torque limiting reduces the overall vehicle power performance, making it difficult to reach a service station quickly, and prolonged operation further exacerbates the malfunction.
Method used
By using an electric motor to compensate for drive torque in hybrid vehicles, the target drive torque of the engine and the electric motor is determined based on the fault torque limit level and the preset limit torque, so that their sum is equal to the required drive torque, thus achieving power compensation.
Benefits of technology
In the event of engine failure and torque limitation, the electric motor's drive torque is fully utilized to reduce engine operating time and ensure the overall fuel economy of the hybrid vehicle.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN120096544B_ABST
Abstract
The application provides a torque distribution method under engine failure, a controller and a vehicle, and solves the problem that the power performance of the vehicle is reduced, and the engine works for a long time in failure, and the failure is further deteriorated in the prior art. The torque distribution method under engine failure provided by the application detects relevant parameters at all times during the operation of the hybrid vehicle, determines whether the failure torque limit occurs and determines the torque limit level of the failure torque limit according to the judgment condition of the preset failure torque limit, determines the power source and the target torque of each power source according to the preset limit torque corresponding to the torque limit level and the demand driving torque of the hybrid vehicle, so that the sum of the target torques of at least one power source is equal to the demand driving torque of the hybrid vehicle. When the engine fails in the torque limit, the motor can be fully utilized to compensate for the corresponding driving torque, which not only fully utilizes the motor, but also reduces the working time of the engine, thereby ensuring the vehicle economy of the hybrid vehicle.
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