Vehicle Start Control Using Door, Seatbelt, and Brake Feedback
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Solution Overview
Problem
Existing vehicle control systems fail to reliably prevent the start of a vehicle when an erroneous accelerator pedal operation occurs while the parking brake is engaged.
Innovation Solution
A vehicle control device that includes sensors to detect the state of the parking brake, seatbelt, and door, and a determination unit to identify erroneous accelerator pedal operations, coupled with controls to engage hydraulic brakes and suppress vehicle driving force when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the parking brake is automatically released when the accelerator pedal is operated, then the vehicle can be started according to the driver's intention, but the vehicle may start erroneously when the driver accidentally operates the accelerator pedal while the parking brake is engaged
Solution Approach 1:
The control unit continuously monitors door opening/closing status, seatbelt fastening status, and brake pedal operation status to determine whether accelerator pedal operation is intentional or erroneous. This feedback mechanism enables the system to distinguish between legitimate start requests and accidental accelerator operations, resolving the contradiction between ease of operation and reliability.
Solution Approach 2:
The system performs preliminary checks of door status, seatbelt status, and brake pedal status before allowing vehicle start. By verifying these conditions in advance, the system prevents erroneous vehicle startup while maintaining smooth operation for legitimate start requests.
2Reliability
If multiple parameters (door status, seatbelt status, brake pedal status) are monitored to determine erroneous operation, then the reliability of erroneous start suppression is improved, but the device complexity increases
Solution Approach 1:
The control unit leverages existing sensors for door status, seatbelt status, and brake pedal status that are already present in modern vehicles. By making these existing components serve the additional function of erroneous accelerator operation detection, the system achieves high reliability without adding significant complexity.
Solution Approach 2:
The system uses the vehicle's existing sensor network and control architecture to perform erroneous operation detection. The control unit integrates information from already-available sources (door sensors, seatbelt sensors, brake pedal sensors) rather than requiring entirely new detection systems, thereby maintaining simplicity while improving reliability.
Data Source
AI summary
In the vehicle control device, when the accelerator pedal is operated while the electric parking brake of the vehicle is operating, the determination unit determines, based on the open/closed state of the vehicle door, the wearing state of the seat belt, and the operating state of the brake pedal, It is determined whether the operation of the accelerator pedal is an erroneous operation. The control unit executes at least one of control for actuating the hydraulic brake of the vehicle and control for suppressing the driving force of the vehicle when it is determined that the operation of the accelerator pedal is an erroneous operation.