Vehicle Level-Difference Detection for Override Suppression and Support
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Solution Overview
Problem
Existing vehicles lack effective mechanisms to accurately detect level differences and perform appropriate control to prevent erroneous starts or support intended overrides of such differences, particularly when wheels encounter obstacles like car stop members.
Innovation Solution
A vehicle system equipped with a level difference detector and a running controller that performs parallel level-difference override suppression and support control, using load sensors and a control unit to calculate level difference height and distance, and adjust torque and braking to prevent erroneous starts and support intended overrides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the vehicle uses basic wheel stop detection based on power increase threshold, then the detection simplicity is maintained, but the accuracy of detecting level differences and distinguishing erroneous starts from intended overrides deteriorates
Solution Approach 1:
The detection system is segmented into multiple independent sensors: load sensors for vertical force detection, rotation sensors for wheel speed measurement, and acceleration sensors for motion state detection. Each sensor handles a specific aspect of level difference detection, improving overall accuracy while maintaining modular simplicity
Solution Approach 2:
The control unit performs multiple functions using the same sensor inputs: it detects level differences, determines wheel override status, distinguishes between erroneous starts and intended overrides, and controls both drive source torque and brake pressure. This multi-functionality reduces the need for additional specialized components
2Reliability
If the vehicle implements only override suppression control to prevent erroneous starts, then safety against unintended movement is improved, but the ability to support intended overrides deteriorates
Solution Approach 1:
The control unit continuously monitors multiple parameters including vertical load changes, wheel rotation speeds, and acceleration sensor data to determine the driver's intent. Based on this feedback, the system dynamically adjusts between suppression mode (when override is unintended) and support mode (when override is intended), resolving the contradiction between safety and operational flexibility
Solution Approach 2:
The control system dynamically switches between two operational modes: override suppression control for safety and override support control for usability. The transition between modes is based on real-time analysis of sensor data, allowing the system to adapt its behavior to the current driving situation rather than being fixed in one mode
3Object-affected harmful factors
If the vehicle applies strong braking force to prevent override, then collision prevention is improved, but the risk of overrun and loss of control deteriorates
Solution Approach 1:
The control unit applies preliminary countermeasures by detecting potential override situations early through load sensor and rotation sensor data. Before a collision can occur, the system begins applying controlled brake pressure and reducing drive source torque, preventing the harmful effect while maintaining control stability through gradual intervention rather than abrupt braking
Data Source
AI summary
A vehicle includes a level difference detector and a running controller. The level difference detector is configured to detect a level difference. The running controller is configured to perform in parallel level-difference override suppression control to suppress erroneous start for override of the level difference and level-difference override support control to support override of the level difference.