Vehicle Engine Control Override via Speed-Adaptive Delay
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Solution Overview
Problem
Existing engine control systems face hazardous situations due to malfunctions in electronic and mechanical linkages controlling vehicle accelerators, brakes, and steering, necessitating a solution to override engine controls safely and effectively.
Innovation Solution
A controller system that determines if the brake control is actuated, calculates a delay time based on vehicle speed, and overrides engine controls if the delay time has passed, thereby preventing unintended acceleration or deceleration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If engine control is overridden immediately when brake is actuated, then driver safety is improved, but false overrides during normal braking may occur causing loss of vehicle control
Solution Approach 1:
The system performs preliminary detection of brake actuation and calculates a delay time based on vehicle speed before executing the override. This preliminary action allows the system to prepare for potential hazards while avoiding premature responses that could cause false overrides during normal braking operations.
Solution Approach 2:
The delay time is dynamically adjusted based on vehicle speed - higher speeds result in shorter delay times, while lower speeds allow longer delays. This dynamic adaptation enables the system to respond appropriately to different driving conditions, improving safety at high speeds while preventing false overrides at low speeds during normal braking.
2Device complexity
If a fixed delay time is used for override, then system complexity is reduced, but safety may be compromised at different vehicle speeds
Solution Approach 1:
The system changes the delay time parameter based on vehicle speed. Rather than using a fixed delay, the delay time is adjusted as a variable parameter that responds to changing operating conditions. This allows the simple override logic to adapt to different speeds, maintaining safety across various driving conditions without requiring complex control algorithms.
3Object-affected harmful factors
If override is delayed to avoid false activation, then false overrides are prevented, but response time to actual hazards is increased
Solution Approach 1:
The delay time parameter is dynamically changed based on vehicle speed, creating an inverse relationship between speed and delay duration. At high speeds where hazards are more critical, the delay is shorter for faster response. At low speeds where normal braking is more common, the delay is longer to prevent false overrides. This parameter adaptation resolves the contradiction between preventing false activations and maintaining rapid hazard response.
Data Source
AI summary
A system comprising a controller configured to determine if a brake control of a vehicle is actuated; determine a delay time in response to a speed of the vehicle; determine if the delay time has passed from when the brake control was actuated; and if the delay time has passed, override an engine control of the vehicle.