ABS Override Module for Airborne Vehicle Control
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Solution Overview
Problem
Off-road vehicle drivers lose significant control while airborne due to the limitations of existing ABS systems, which are exacerbated by the need for intensive training and the loss of control through braking, particularly in vehicles equipped with ABS systems.
Innovation Solution
A vehicle electronic control system comprising a vehicle bus, an ABS module, a shock position sensor, and an ABS override module, where the ABS override module sends a stop-ABS signal to prevent the ABS module from communicating with the brake actuator based on shock compression signals from the shock position sensor, allowing for improved control during airborne maneuvers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ABS system is activated during airborne maneuvers, then wheel slip control is improved, but vehicle control precision deteriorates due to unwanted brake intervention
Solution Approach 1:
The system applies preliminary anti-action by detecting airborne conditions through shock position sensors before the driver attempts braking, and preemptively disabling the ABS system to prevent unwanted brake intervention. This anticipatory measure eliminates the contradiction by ensuring ABS remains inactive during airborne maneuvers, preserving both wheel slip control reliability when needed and vehicle control precision when airborne.
Solution Approach 2:
The control system introduces an intermediary mechanism that mediates between the ABS module and brake actuator during airborne conditions. The shock position sensors act as intermediaries detecting airborne state, which then triggers the control system to send disable signals to the ABS module, preventing direct ABS-brake actuator communication during jumps while maintaining normal ABS function during ground contact.
2Ease of operation
If driver uses brake manipulation to adjust vehicle orientation in air, then some control is regained, but intensive training is required and control is lost through ABS braking
Solution Approach 1:
The system implements self-service by automatically detecting airborne conditions and disabling ABS without driver intervention. The shock position sensors and control system work autonomously to manage ABS activation status, eliminating the need for drivers to learn complex brake manipulation techniques for airborne control while preventing unwanted ABS intervention.
Solution Approach 2:
The system applies dynamics by making ABS activation status changeable based on real-time shock position data. The ABS system transitions between active and inactive states dynamically according to whether the vehicle is airborne or grounded, allowing optimal control characteristics for each phase without requiring driver skill changes.
3Reliability
If ABS module communicates with brake actuator during airborne phase, then braking control is maintained, but suspension strain increases and landing control deteriorates
Solution Approach 1:
The system applies preliminary anti-action by detecting airborne conditions before landing and preemptively disabling ABS communication with the brake actuator. This prevents brake forces from being applied during the critical landing phase, protecting suspension components from excessive strain while maintaining braking control reliability during ground contact phases.
Data Source
AI summary
One of the most popular and exhilarating stunts in off-road vehicle driving is catching air off a jump. Unfortunately, once the vehicle is in the air, the driver loses significant control of the vehicle. An electronic vehicle control system is described herein that addresses this problem. The system may include an ABS module, a shock position sensor, and an ABS override module. The ABS override module may be coupled to the shock position sensor and the ABS module. The ABS override module may receive a shock-extended signal from the shock position sensor indicating one or more of the shocks are fully extended. The ABS override module may send a stop-ABS signal that may prevent the ABS module from operating. The ABS override module may additionally be connected to a yaw rate sensor, the brakes, and the throttle, and may automatically control the pitch, roll and yaw of the vehicle.