Idling Stop Control Device with Start Improvement Feedback
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Solution Overview
Problem
Engines stopped by idling stop control face difficulties in restarting when the start improvement device, such as glow plugs, does not function normally, leading to issues with engine restartability.
Innovation Solution
A device that controls idling stop by prohibiting idling stop when the start improvement device does not function normally, or by increasing the threshold temperature for idling stop based on the abnormal condition of the start improvement device, ensuring the engine can be restarted even if the start improvement device is malfunctioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the threshold value of engine temperature for idling stop is set lower when a start improvement device is provided, then fuel consumption is reduced and idling stop can be carried out at lower temperatures, but if the start improvement device does not function normally, the engine cannot be restarted easily
Solution Approach 1:
The control device monitors the operational status of the start improvement device and uses this feedback to dynamically adjust the idling stop control strategy. When the start improvement device is detected to be abnormal, the control device prohibits idling stop or raises the temperature threshold, ensuring engine restartability while maintaining fuel efficiency when the device functions normally
Solution Approach 2:
The idling stop control strategy is made dynamic by adjusting the temperature threshold based on the real-time status of the start improvement device. The threshold is lowered when the device is normal to enable fuel-saving idling stop, and raised or prohibited when the device is abnormal to ensure restartability, creating a flexible adaptive control system
2Loss of energy
If idling stop is carried out when engine temperature is lower than usual predetermined temperature, then fuel consumption is reduced, but engine restartability is compromised when the start improvement device is not functioning
Solution Approach 1:
The control device continuously monitors the start improvement device status and uses this feedback to adjust idling stop execution. When abnormality is detected, the system provides feedback to prohibit or restrict idling stop, ensuring that engine restart operation remains easy even at lower temperatures, while still allowing fuel-saving idling stop when the device is functional
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents the issue of engines not restarting easily by ensuring idling stop is not carried out when the start improvement device is not functioning, and allows for successful restarts even if the device is malfunctioning, thus reducing fuel consumption and improving engine reliability.
Implementation Method 1
the temperature within each cylinder is increased by using a glow plug
Data Source
AI summary
In a device for controlling idling stop of an engine in which the idling stop is carried out when a temperature of the engine that is about to be stopped by the idling stop is higher than a threshold value, when the start improvement device does not function normally, the idling stop is prohibited regardless of engine temperature. Thus, the problem in which the engine cannot be restarted satisfactorily does not occur.