Vehicle Deceleration Coordination During Turnability Control Faults
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Solution Overview
Problem
Existing vehicle control apparatuses fail to effectively suppress disturbances in vehicle behavior when abnormalities occur in the control over the brake device or the power plant device during turnability improvement control.
Innovation Solution
A vehicle control apparatus that includes an information acquisition part, a determination part, a deceleration force computation part, and a coordinated control part. When an abnormality is detected, the apparatus adjusts the distribution ratio between brake and power plant deceleration forces and degenerates their sum according to a prescribed time rate of change to maintain smooth vehicle control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If turnability improvement control is executed by providing deceleration force to the vehicle, then turning performance is improved, but vehicle behavior becomes unstable when abnormality occurs in brake or power plant control
Solution Approach 1:
The control apparatus continuously monitors the actual deceleration force generated by the brake device and power plant device, compares it with the target deceleration force, and adjusts the distribution ratio in real-time based on feedback from abnormality detection, ensuring stable vehicle behavior even when abnormalities occur
Solution Approach 2:
The system pre-establishes a mechanism to detect abnormalities in brake or power plant control before they cause severe vehicle behavior disturbances, and prepares to adjust the deceleration force distribution ratio to compensate for potential failures, thus cushioning the impact of abnormalities on vehicle stability
2Speed
If deceleration force is distributed between brake device and power plant device, then turnability is improved, but control complexity increases when abnormality response is added
Solution Approach 1:
The distribution ratio between brake deceleration force and power plant deceleration force is made dynamic rather than fixed, allowing the system to automatically adjust the ratio based on real-time abnormality detection and vehicle state, optimizing turnability while maintaining stability without requiring overly complex manual intervention systems
Data Source
AI summary
A vehicle control apparatus that provides control over a brake device or a power plant device of a host vehicle includes: an information acquisition part configured to acquire information on state of the brake device and the power plant device and information on front wheel steering angle; a determination part configured to determine whether or not an abnormality has occurred in a turnability improvement control; a deceleration force computation part configured to compute a required deceleration force; and a coordinated control part configured to perform a coordinated control in which a distribution ratio between a brake deceleration force of the brake device and a power plant deceleration force of the power plant device is adjusted. When an abnormality has occurred in the turnability improvement control, a sum of the brake deceleration force and the power plant deceleration force is degenerated according to a prescribed time rate of change.