Idling Stop Control Device Threshold Adjustment for Actuator Stability
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Solution Overview
Problem
Idling stop control systems frequently restart the engine during the activation of electric actuators like the electric active stabilizer, leading to a decrease in battery power and discomfort for the vehicle driver due to changes in the vehicle's motion state, as the electric actuators consume significant power.
Innovation Solution
An idling stop control device with an electronic control unit that adjusts the engine stop permission threshold to a higher value when an electric actuator activates, ensuring the battery power remains above the restart threshold, thereby preventing unnecessary engine restarts and stabilizing the vehicle's motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the engine is automatically restarted when battery power decreases below the reference amount, then the engine can be assuredly restarted, but the electric actuator's operation is interrupted causing vehicle motion state changes and driver discomfort
Solution Approach 1:
The control device detects activation of the electric actuator before the engine restart is executed, and in advance prohibits the engine restart during this period. This preliminary anti-action prevents the harmful effect of interrupting the electric actuator's operation, which would cause vehicle motion state changes and driver discomfort, while still maintaining the ability to restart the engine when the actuator is not active.
2Reliability
If the engine operates continuously to supply power to electric actuators, then the electric actuators can operate without power interruption, but fuel consumption increases and exhaust gas emissions increase
Solution Approach 1:
The system dynamically adjusts engine operation status based on real-time detection of electric actuator activation state. When the electric actuator is activated, the engine is prohibited from restarting to ensure stable power supply. When the actuator is not activated, the engine can be restarted to save fuel. This dynamic control optimizes the balance between actuator operation stability and fuel consumption.
3Loss of energy
If the engine is restarted frequently during electric actuator activation, then the battery power can be maintained above the reference amount, but the vehicle's motion state changes undesirably and the driver experiences discomfort
Solution Approach 1:
The control device performs preliminary detection of the electric actuator's activation state before allowing engine restart. By detecting whether the actuator is activated in advance, the system can prohibit engine restart during actuator operation, preventing the harmful effect of power supply interruption that would cause vehicle motion state changes and driver discomfort.
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
This solution reduces the frequency of engine restarts during electric actuator activation, minimizing discomfort for the driver and conserving fuel and reducing exhaust gas emissions by maintaining stable vehicle control and optimizing battery power usage.
Implementation Method 1
an electric power generator that generates an electric power by a rotation of the engine
Implementation Method 2
a starter that starts an operation of the engine with an electric power supplied from the battery
Data Source
AI summary
An electronic control device automatically stops an engine operation when a remaining electric power amount index value is equal to or larger than an engine stop permission threshold. The device automatically restarts the engine operation when the remaining electric power amount index value is smaller than an engine restart threshold after the engine operation is automatically stopped. The device changes the engine stop permission threshold from a first threshold, which has been set until a start of an activation of an electric actuator, to a second threshold, which is larger than the first threshold, when the automatic engine stop is not carried out and the activation of the actuator is detected.