High-Pressure Pump Control Device Noise Reduction
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Solution Overview
Problem
Existing control devices for high-pressure pumps in fuel supply systems for internal combustion engines face challenges in accurately reducing operating noise, particularly during idle operation or fuel cut control, due to erroneous detection of the control valve's operating condition, leading to inadequate electric power control and increased noise levels.
Innovation Solution
A control device for a high-pressure pump that includes a control amount change part, an operation detection part, a learning part, and a determination part, which adjusts the energization control of the control valve to prevent erroneous detection by prohibiting learning when the operating time is shorter than the detection time, thereby improving the accuracy of noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the energization control amount of the control valve is reduced to decrease operating time of the high-pressure pump, then the operating noise is reduced, but the detection precision of the operating condition deteriorates
Solution Approach 1:
The system performs preliminary detection of the operating condition before executing the learning control. By detecting whether the control valve has operated based on drive current changes before reducing the energization control amount, the system ensures accurate detection is completed prior to noise reduction actions, preventing erroneous detection that would occur if detection attempted during shortened operating time
Solution Approach 2:
The system uses feedback from drive current monitoring to determine operating condition. By continuously monitoring changes in drive current of the control valve and using this feedback to determine whether the valve has operated, the system maintains accurate detection capability even when operating time is reduced, allowing proper adjustment of energization control amount without erroneous detection
2Object-generated harmful factors
If the operating time of the control valve is shortened to reduce noise, then the harmful factors are reduced, but the reliability of operation detection deteriorates
Solution Approach 1:
The system performs preliminary detection of the operating condition before executing the learning control. By detecting whether the control valve has operated based on drive current changes before reducing the energization control amount, the system ensures accurate detection is completed prior to noise reduction actions, preventing erroneous detection that would occur if detection attempted during shortened operating time
Solution Approach 2:
The system uses feedback from drive current monitoring to determine operating condition. By continuously monitoring changes in drive current of the control valve and using this feedback to determine whether the valve has operated, the system maintains accurate detection capability even when operating time is reduced, allowing proper adjustment of energization control amount without erroneous detection
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
The solution effectively reduces operating noise of the high-pressure pump by enhancing the learning accuracy of the energization control amount, ensuring accurate detection and control of the control valve's operation, even under conditions where the operating time is reduced.
Implementation Method 1
the valving element moves to a valve-closed position by the electromagnetic force of the coil during energization of the coil
Data Source
AI summary
A control device includes a control amount change part that changes an energization control amount of a control valve, an operation detection part that detects an operating condition of the control valve when the energization control amount is changed, a learning part that learns the energization control amount based on the operating condition of the control valve to reduce an operating noise of a high-pressure pump, and a determination part that determines whether or not an operating time of the control valve for the energization control amount is shorter than a time that allows for the detection of the operating condition of the control valve. The learning part prohibits the learning when the operating time of the control valve for the energization control amount is determined to be shorter than the time that allows for the detection of the operating condition of the control valve.