Vehicle Sideslip Control System for Dynamic Torque Management

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Solution Overview

Problem

Existing vehicle stability control systems prevent drivers from performing controlled sideslip maneuvers during cornering, as they intervene to prevent skidding, thereby limiting the driving experience and safety benefits for experienced drivers who wish to induce controlled skids.

Innovation Solution

A vehicle sideslip control system that maintains a prescribed non-zero target sideslip angle, allowing drivers to perform controlled sideslip maneuvers while ensuring the system monitors and intervenes only when necessary to prevent excessive skidding, thereby enabling a closed-loop control of traction and assisting drivers in maintaining the intended path.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If ESC system intervenes to prevent skidding during cornering, then vehicle stability is improved, but controlled sideslip maneuvers cannot be performed

Engineering Contradiction:

Improvevehicle stabilityVSAvoidcontrolled sideslip maneuver capability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The ESC system dynamically adjusts its intervention threshold based on driving conditions and driver intent. By making the control threshold variable rather than fixed, the system can adapt between stable cornering (high threshold) and controlled sideslip maneuvers (low threshold), resolving the contradiction between stability and maneuver versatility

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the control parameter (sideslip angle threshold) from a fixed value to a variable parameter that can be adjusted based on vehicle state and driver input. This allows the ESC to transition between preventing skids and allowing controlled sideslip, simultaneously achieving stability and maneuver capability

Inventive Principle:

Principle #35Parameter changes

2Reliability

If ESC system provides continuous control input to eliminate sideslip, then vehicle safety is improved, but driver learning opportunity is reduced

Engineering Contradiction:

Improvevehicle safetyVSAvoiddriver learning opportunity

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The ESC system applies partial control input rather than continuous maximum intervention. By providing only sufficient control to maintain safety margins while allowing some sideslip, the system both ensures vehicle safety and provides drivers with learning opportunities through controlled exposure to sideslip conditions

Inventive Principle:

Principle #16Partial or excessive action

3Adaptability or versatility

If ESC system is disabled to allow controlled sideslip, then driving experience is improved, but safety protection is lost

Engineering Contradiction:

Improvecontrolled sideslip maneuver capabilityVSAvoidsafety protection

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The ESC system continuously monitors vehicle state parameters (sideslip angle, yaw rate, acceleration) and provides feedback control. This closed-loop feedback allows the system to distinguish between controlled sideslip maneuvers (within safe parameters) and dangerous skidding (exceeding thresholds), maintaining safety protection while enabling maneuver capability

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP2726348B1Vehicle motion control apparatus and method

Publication Date: 2018.03.28 JAGUAR LAND ROVER LTD

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AI summary

Embodiments of the present invention provide a vehicle sideslip control system for maintaining a non-zero value of sideslip whilst cornering. The system comprises a vehicle sideslip controller operable automatically to control the vehicle to apply a positive or negative torque to one or more wheels of the vehicle in such a manner as to maintain the non-zero value of sideslip.