Vehicle Engine Automatic Shutdown Control System
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Solution Overview
Problem
Existing automatic shutdown systems for industrial vehicle engines are not suitable for all industrial vehicles, leading to excessive fuel consumption, reduced maintenance intervals, security risks, and air pollution, as they often rely on inappropriate parameters and lack reliability in determining operator absence and engine readiness for restart.
Innovation Solution
An engine control system utilizing multiple sensors (operator presence, handbrake position, engine coolant temperature, battery charge, and logic controller) to implement a predefined shutdown and restart protocol, ensuring secure and efficient engine management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If existing automatic shutdown systems are implemented, then engine shutdown may occur, but they lead to excessive fuel consumption, reduced maintenance intervals, and security risks due to inappropriate parameters
Solution Approach 1:
The system changes the parameters used for shutdown determination from simple time-based or single-sensor parameters to a multi-parameter protocol including operator presence detection, handbrake position, engine temperature, and battery charge level. This ensures shutdown only occurs when all parameters indicate appropriate conditions, preventing premature shutdown while the engine needs to remain warm for DPF regeneration.
Solution Approach 2:
The shutdown determination is segmented into multiple independent sensor inputs (operator presence sensor, handbrake position sensor, temperature sensor, battery sensor) rather than relying on a single parameter. Each sensor independently monitors its specific parameter, and the logic controller integrates these segmented inputs to make the final shutdown decision, improving overall system reliability.
2Loss of time
If existing shutdown systems are used, then automatic shutdown may occur, but they reduce time between services due to unnecessary engine running
Solution Approach 1:
The system performs preliminary checks of all required parameters (operator presence, handbrake position, engine temperature, battery charge) before initiating shutdown. This preliminary action ensures that shutdown only occurs when all conditions are favorable, preventing premature shutdown that would necessitate earlier engine restart and service intervention.
3Reliability
If existing shutdown systems are implemented, then engine may shut down automatically, but they create security risks as operators may not consistently turn off engines
Solution Approach 1:
The system provides self-service security by automatically monitoring operator presence and engine conditions without requiring operator action. The operator presence sensor detects when the operator leaves the seat and automatically initiates the shutdown protocol, eliminating reliance on operator memory or consistency while maintaining a relatively simple interface.
4Object-affected harmful factors
If existing shutdown systems are used, then shutdown may occur, but they lead to air pollution due to engine running when vehicle is not in use
Solution Approach 1:
The system uses feedback from multiple sensors continuously monitoring engine conditions, operator presence, handbrake position, and battery charge. This feedback loop ensures shutdown only occurs when all parameters confirm appropriate conditions, preventing premature shutdown that would require engine restart and subsequent service intervention, thereby reducing air pollution while maintaining reliable operation.
Data Source
Figure 1
AI summary
An engine control system for automatic shutdown of an industrial vehicle engine, the control system comprising a sensor configured to determine the absence of an operator from a vehicle-operating seat; a handbrake position sensor configured to determine whether a handbrake is in an applied position; a temperature sensor for measuring the temperature of engine coolant; a battery sensor for measuring the condition of a battery; and a logic controller configured to gather data from the sensors and to shut down the engine according to a predefined shutdown protocol related to inputs from each of the sensors.