Variable Pull-In Time Fuel Pressure Control
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Solution Overview
Problem
Fuel delivery systems for gasoline direct injected engines face challenges in minimizing electrical energy consumption and acoustic noise generation due to production variations, where predetermined characteristics may lead to inefficient energy use and noise production, and altering these characteristics risks unstable pressure control.
Innovation Solution
A system and method that vary the pull-in time interval of the electrical signal applied to the inlet control valve based on fuel pressure to reduce electrical energy consumption and acoustic noise, using a controller to adjust the signal and ensure proper valve operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If predetermined characteristics of electrical signal are used to actuate the inlet control valve, then the valve can be operated reliably, but electrical energy consumption and acoustic noise generation increase due to production variations
Solution Approach 1:
The patent applies dynamics by making the electrical signal characteristics variable rather than fixed. The controller dynamically adjusts the pull-in time interval and other signal parameters based on real-time feedback from pressure sensors and other system conditions. This allows the system to optimize energy consumption and noise levels for each specific valve while maintaining reliable operation, resolving the contradiction between reliability and energy efficiency.
Solution Approach 2:
The patent implements feedback by using pressure sensors to monitor the actual fuel pressure and other system parameters, then feeding this information back to the controller. The controller uses this feedback to adjust the electrical signal characteristics (pull-in time interval, duration, amplitude) to match the actual valve conditions and system state. This closed-loop approach ensures reliable valve operation while minimizing energy consumption and noise for each specific operating condition.
2Reliability
If predetermined characteristics of electrical signal are used to actuate the inlet control valve, then the valve can be operated reliably, but acoustic noise generation increases due to production variations
Solution Approach 1:
The patent applies dynamics by making the electrical signal characteristics variable rather than fixed. The controller dynamically adjusts the pull-in time interval and other signal parameters based on real-time feedback from pressure sensors and other system conditions. This allows the system to optimize energy consumption and noise levels for each specific valve while maintaining reliable operation, resolving the contradiction between reliability and energy efficiency.
Solution Approach 2:
The patent implements feedback by using pressure sensors to monitor the actual fuel pressure and other system parameters, then feeding this information back to the controller. The controller uses this feedback to adjust the electrical signal characteristics (pull-in time interval, duration, amplitude) to match the actual valve conditions and system state. This closed-loop approach ensures reliable valve operation while minimizing energy consumption and noise for each specific operating condition.
3Use of energy by moving object
If the pull-in time interval is reduced to minimize electrical energy consumption, then energy efficiency improves, but the valve may not close properly leading to unstable pressure control
Solution Approach 1:
The patent applies dynamics by making the electrical signal characteristics variable rather than fixed. The controller dynamically adjusts the pull-in time interval and other signal parameters based on real-time feedback from pressure sensors and other system conditions. This allows the system to optimize energy consumption and noise levels for each specific valve while maintaining reliable operation, resolving the contradiction between reliability and energy efficiency.
Solution Approach 2:
The patent implements feedback by using pressure sensors to monitor the actual fuel pressure and other system parameters, then feeding this information back to the controller. The controller uses this feedback to adjust the electrical signal characteristics (pull-in time interval, duration, amplitude) to match the actual valve conditions and system state. This closed-loop approach ensures reliable valve operation while minimizing energy consumption and noise for each specific operating condition.
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 approach effectively reduces electrical energy consumption and acoustic noise while maintaining stable fuel pressure control, improving the efficiency and performance of the fuel delivery system.
Implementation Method 1
a solenoid actuated inlet control valve metering fuel to a high pressure piston type pump
Data Source
AI summary
A system and method for controlling fuel pressure in a fuel delivery system. The system includes a fuel pump and an inlet control valve. The inlet control valve is operated to a closed state by an electrical signal applied to the inlet control valve. The electrical signal includes a pull-in portion of the electrical signal that is applied to the inlet control valve having a pull-in time interval that is varied based on the fuel pressure. By varying the pull-in time interval to control fuel pressure, electrical energy consumed and acoustic noise generated by the fuel delivery system are reduced.