Vehicle Torque Steer Compensation via EPS Auxiliary Power
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Solution Overview
Problem
Conventional vehicles experience torque steer due to differences in drive shaft lengths, leading to uneven torque application and vehicle leaning, which is exacerbated during sudden starts or accelerations, and existing solutions that reduce drive torque compromise acceleration performance.
Innovation Solution
A vehicle running control apparatus and method that includes a drive control unit, a pulling compensation control unit, and an EPS control unit to calculate and apply compensation torque based on speed differences between driving and driven wheels, generating steering auxiliary power to counteract torque steer and enhance stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If drive torque is reduced to prevent torque steer, then vehicle stability is improved, but acceleration performance is degraded
Solution Approach 1:
The patent introduces an EPS control unit as an intermediary system that generates steering auxiliary power based on pulling compensation torque. This mediator allows the drive control to maintain high torque for acceleration while the EPS system simultaneously compensates for torque steer effects, resolving the contradiction between acceleration performance and vehicle stability without directly reducing drive torque
Solution Approach 2:
The patent dynamically adjusts the steering auxiliary power parameter based on pulling compensation torque calculations that consider speed differences between driving and driven wheels. By changing the steering assistance parameter in real-time according to vehicle operating conditions, the system maintains vehicle stability during sudden starts or accelerations without compromising acceleration performance
2Productivity
If drive torque is applied to left and right drive shafts, then acceleration performance is improved, but torque steer occurs causing vehicle to lean
Solution Approach 1:
The patent applies preliminary anti-action by calculating pulling compensation torque based on speed differences between wheels before the torque steer becomes severe. The EPS control unit generates steering auxiliary power in advance to counteract the pulling force, preventing the vehicle from leaning while maintaining high drive torque for acceleration performance
Data Source
AI summary
The present disclosure relates to a vehicle running control apparatus and a vehicle running control method. The invention calculates a compensation torque for preventing the pulling of the vehicle by reflecting the speed difference between the driving wheel and the driven wheel of the vehicle, thereby enabling the vehicle to run more stably as compared to the prior art.