Vehicle Acceleration Suppression Control for Shift-Range Misoperation
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Solution Overview
Problem
Conventional rapid acceleration suppression systems fail to prevent smooth traffic flow and ensure safety when a driver mistakenly presses the accelerator instead of the brake, leading to potential blocking of traffic flow and safety hazards.
Innovation Solution
A rapid acceleration suppression device and method that includes a shift position acquisition part, accelerator position acquisition part, accelerator operation determination part, and acceleration suppression control part to suppress vehicle acceleration when the gearshift is in a non-drive range and the accelerator pedal is suddenly depressed, allowing the vehicle to start at a low speed and limited acceleration, and adjust speed based on obstacle detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If acceleration suppression control is applied when shifting from non-drive range to drive range, then sudden start is prevented, but the driver may be stranded in intersection or blocked traffic flow
Solution Approach 1:
The control system dynamically adjusts acceleration suppression based on vehicle speed and shift timing. When shift occurs at low speed, acceleration is suppressed; when shift occurs at higher speed or after vehicle is already moving, normal acceleration is permitted. This dynamic approach prevents sudden starts while avoiding blocking traffic flow in intersections.
Solution Approach 2:
The system changes the acceleration suppression parameter based on vehicle operating conditions. Specifically, it monitors vehicle speed and determines whether to apply acceleration suppression control. When vehicle speed exceeds a threshold or shift occurs after vehicle is already moving, the suppression parameter is adjusted to allow normal acceleration, thus preventing the driver from being stranded.
2Reliability
If accelerator position signal is lowered to suppress rapid acceleration, then sudden start is prevented, but driver intent is not accurately reflected
Solution Approach 1:
The system performs preliminary detection of shift position and vehicle speed before applying acceleration suppression. By checking whether the vehicle is already moving or the shift occurs at higher speed, the system applies acceleration suppression only when appropriate, thus maintaining accurate reflection of driver intent while preventing sudden starts.
3Reliability
If acceleration suppression is applied when accelerator is suddenly depressed, then safety is improved, but vehicle responsiveness is reduced
Solution Approach 1:
The control system dynamically adjusts acceleration suppression based on gearshift position and vehicle speed. When gearshift is in non-drive range or vehicle speed is low, acceleration suppression is applied to prevent sudden starts. When vehicle speed exceeds threshold or shift occurs after vehicle is already moving, normal acceleration response is permitted, thus maintaining vehicle responsiveness while improving safety.
Data Source
AI summary
A rapid acceleration suppression device of a vehicle includes: a shift position acquisition part configured to acquire an operation position of a gearshift; an accelerator position acquisition part configured to acquire a depression amount of an accelerator pedal; an accelerator operation determination part configured to determine an operating state of the accelerator pedal; and an acceleration suppression control part configured to provide control over a vehicle drive part, (i) such that acceleration of the vehicle is suppressed, when the position of the gearshift is in a non-drive range and also when the accelerator operation determination part determines that a sudden depression of the accelerator pedal, and (ii) such that the vehicle travels at a low speed, and then, at an accelerated speed within a prescribed upper limit, when the position of the gearshift is changed from the non-drive to drive range, while the accelerator pedal is kept on being depressed.