Vehicle Turning Control Torque Adjustment
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Solution Overview
Problem
Existing vehicle turning control techniques struggle to precisely prevent TACK-IN (rapid turning) due to variations in accelerator pedal angle and speed, leading to instability and difficulty in anticipating vehicle motion.
Innovation Solution
A turning control apparatus that adjusts driving torque between the left and right wheels based on vehicle turning state, acceleration/deceleration values, and velocity, using a driving torque controller, sensors, and an Electronic Control Unit (ECU) to set and adjust a basic-driving-torque-difference value, thereby improving turning ability and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If driving torque is adjusted between left and right wheels to prevent TACK-IN, then vehicle stability is improved, but turning ability deteriorates
Solution Approach 1:
The patent applies dynamics by making the driving torque difference value adjustable based on vehicle conditions. The basic-driving-torque-difference value is modified according to acceleration/deceleration state and vehicle velocity, allowing the system to adapt between stability and turning ability requirements dynamically. This resolves the contradiction by enabling the torque adjustment to be strong when stability is needed and weak when turning ability is needed.
2Stability of the object's composition
If driving torque adjustment is applied to avoid TACK-IN during deceleration, then vehicle stability is improved, but driver control difficulty increases
Solution Approach 1:
The patent uses feedback by continuously monitoring acceleration/deceleration state and vehicle velocity to determine the appropriate basic-driving-torque-difference value. The ECU adjusts the torque difference based on real-time vehicle state feedback, ensuring that stability control is applied appropriately without过度 interfering with driver intent. This resolves the contradiction by making the control system responsive to actual vehicle conditions rather than applying fixed torque adjustment.
3Stability of the object's composition
If selective TACK-IN prevention control is applied, then vehicle stability is improved in some conditions, but operatability deteriorates due to on-off control
Solution Approach 1:
The patent implements continuous control by adjusting the basic-driving-torque-difference value smoothly based on acceleration/deceleration state and velocity, rather than applying on-off control. The torque adjustment varies continuously with vehicle conditions, providing stable and predictable vehicle behavior that improves operatability while maintaining stability. This resolves the contradiction by eliminating the abrupt on-off control behavior that caused operatability issues.
Data Source
AI summary
A turning control apparatus for a vehicle with improved turning ability and that avoids degradation of acceleration ability is provided.The turning control apparatus comprises: a driving torque controller (31) for adjusting driving torque between a left and right wheels (14L and 14R); a unit(41) for setting a basic-driving-torque-difference value indicating a difference of the driving torque between the left and right wheels (14L and 14R); a unit (42) for obtaining an acceleration/deceleration value indicating a degree of acceleration/deceleration of the vehicle; and a unit (43) for adjusting the basic-driving-torque-difference value, as a target driving torque difference, according to the acceleration/deceleration value and the velocity of the vehicle sensed.The driving torque controller (31) adjusts the driving torque between the left and right wheels (14L and 14R) according to the target driving torque obtained by the basic-driving-torque-difference value adjusting unit (43).