Vehicle Remote Control Engine Stop via Fuel Cut
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Solution Overview
Problem
Existing remote control starter systems fail to forcibly stop an engine when it is impossible to cut off the power supply, leading to continuous engine operation.
Innovation Solution
The remote control device incorporates a body control module (BCM) and engine control module (ECM) connected via CAN communication, which allows for a fuel cut request to be sent to the ECM when the engine does not stop despite an ignition OFF request, ensuring the engine is stopped by cutting off fuel supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ignition circuit is cut off to stop the engine, then the engine can be forcibly stopped under normal conditions, but the engine cannot be stopped if the power supply fails
Solution Approach 1:
The system changes the control parameter from ignition circuit interruption to fuel supply interruption. When the ignition circuit fails to stop the engine, the control device switches to cutting off fuel supply, which reliably stops the engine even when power supply failure prevents ignition circuit control from working.
2Ease of operation
If a remote control starter system is implemented, then the engine can be remotely started for convenience, but the system fails to stop the engine when power supply is unavailable
Solution Approach 1:
The control device monitors the state of the ignition circuit and prepares a backup stopping method (fuel supply cutoff) in advance. When ignition circuit control fails, the pre-prepared fuel cutoff mechanism activates to ensure the engine can still be stopped, providing a cushion against control failure.
3Device complexity
If only ignition circuit control is used to stop the engine, then the control system is simple, but the system cannot handle power supply failures
Solution Approach 1:
The control device is designed to perform multiple stopping functions: it can interrupt the ignition circuit under normal conditions and switch to cutting off fuel supply when ignition control fails. This multi-functional approach ensures reliable engine stopping across different failure scenarios without significantly increasing system complexity.
Data Source
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AI summary
A remote control device for vehicle is capable of remotely controlling the start and stop of an engine mounted in a vehicle. The remote control device for vehicle includes a remote controller for transmitting a start request and a stop request of the engine, and an engine control unit for stopping the engine by stopping fuel supply to the engine in the case of satisfying, in a state where the engine is started upon receiving the start request, at least one of a condition that a predetermined forced OFF time has elapsed and a condition that the stop request has been received.