Motor-First ESP Interference Torque Control in Hybrid Vehicles
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Solution Overview
Problem
Current vehicles rely solely on an engine to respond to interference torque from the Electronic Stability Program (ESP), resulting in inaccurate and slow torque responses, which compromises vehicle stability.
Innovation Solution
A method and system for controlling interference torque in vehicles, utilizing a combination of an electric motor and an engine, where the motor responds to ESP interference in priority, and both the motor and engine cooperate to ensure accurate and rapid torque responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the engine responds to interference torque from ESP, then the vehicle can maintain stability, but the response time is slow and torque accuracy is poor
Solution Approach 1:
The patent segments the torque response function between two power sources: the motor handles rapid torque adjustments for ESP interference, while the engine maintains steady-state operation. This division allows the motor to provide fast response without compromising engine stability, directly resolving the contradiction between response speed and reliability.
Solution Approach 2:
The motor acts as an intermediary between the ESP control system and the engine. When ESP requires torque intervention, the motor provides the torque modulation without directly affecting engine operation, enabling fast response while preserving engine stability and accuracy.
2Speed
If the motor responds to arbitrated torque, then torque response speed and accuracy improve, but the engine may deviate from optimal operation point
Solution Approach 1:
The control system segments torque responsibilities: the motor absorbs all torque changes required by ESP arbitration, while the engine operates independently at its optimal point. This segmentation ensures the motor provides rapid response without disturbing engine operation stability.
Solution Approach 2:
The patent replaces the traditional mechanical coupling where engine torque directly responds to ESP demands with an electrical substitution: the motor provides the torque modulation electronically, decoupling ESP control from engine operation and allowing independent optimization of both.
3Measurement precision
If both motor and engine cooperate to respond to arbitrated torque, then torque accuracy improves, but system complexity increases
Solution Approach 1:
The patent segments the torque response into two distinct control paths: motor torque control for rapid ESP response and engine torque control for steady-state operation. This segmentation simplifies the control logic compared to coordinating both power sources simultaneously, while achieving high torque accuracy through the motor's precise control capabilities.
Solution Approach 2:
The motor is given excessive capability to handle the full range of ESP torque requirements alone, eliminating the need for complex coordination with the engine during ESP activation. This partial action by the motor achieves high torque accuracy without requiring both power sources to cooperate, thereby reducing system complexity.
Data Source
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AI summary
The present disclosure relates to the field of vehicle control technology, and provides a method and a device for controlling an interference torque for a vehicle, a controller, an equipment, a program, a medium. The method provided in the present disclosure is applied to a new energy vehicle including an electric motor and an engine, and includes steps of: arbitrating between a pedal torque of a driver and an interference torque required by ESP; performing an initial allocation on the electric motor and/or the engine in response to the pedal torque when the vehicle is in a hybrid drive mode, to meet an engine torque request while ensuring that the engine is operated at an optimal operation point; and determining, based on the initial allocation, whether the motor is capable of fully responding to the arbitrated torque, if so, controlling the motor to respond to the arbitrated torque in priority, otherwise controlling the engine and the motor to cooperatively respond to the arbitrated torque. The present disclosure, by enabling the motor to respond to ESP interference in priority, achieves the objective of enabling the vehicle to respond rapidly to the interference torque from the ESP.