Valve Actuator Current Profile for Noise Reduction
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Solution Overview
Problem
High-pressure valves in accumulator-type injection systems of internal combustion engines experience noise and wear due to intense stresses, particularly during continuous loading, and existing solutions fail to effectively mitigate these issues while ensuring reliable operation.
Innovation Solution
A method and device for controlling a valve using a spring and actuator with a predefined current profile, featuring sections with continuously falling and rising current profiles, which allows for slow valve closure or opening, reducing noise and wear, and ensuring reliable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the valve is actuated quickly to ensure fast operation, then productivity is improved, but noise and wear increase due to intense stresses
Solution Approach 1:
The patent applies dynamics by varying the current profile over time during valve actuation. The current is increased gradually in a controlled manner rather than applied instantly, allowing the valve to open or close at optimized speeds that balance productivity with reduced noise and wear. The dynamic current adjustment enables the system to adapt the actuation speed to operational requirements.
Solution Approach 2:
The patent changes the electrical parameter (current) applied to the actuator over time. By implementing a time-varying current profile that increases gradually rather than applying full current immediately, the system achieves controlled valve movement that reduces mechanical stresses, noise, and wear while maintaining fast operation. The current parameter is dynamically adjusted during the actuation process.
2Reliability
If the valve is actuated with high force to ensure reliable operation under continuous loading, then reliability is improved, but noise increases due to intense stresses
Solution Approach 1:
The patent uses dynamic current control to apply force progressively rather than instantly. The current profile is designed to increase over time, allowing the actuator to build up force gradually to move the valve against spring force and pressure differential. This dynamic approach ensures reliable valve operation under continuous loading while avoiding sudden high-force impacts that generate noise.
Solution Approach 2:
The patent applies preliminary action by pre-charging the actuator with increasing current before full valve actuation. The current profile prepares the actuator by gradually building electrical energy and mechanical force, ensuring the valve can be actuated reliably against high spring forces and pressure differentials without sudden shocks that would generate noise.
3Speed
If the valve is actuated with high current to ensure fast response, then speed is improved, but wear increases due to intense stresses
Solution Approach 1:
The patent changes the current parameter over time to achieve fast valve response without excessive wear. Instead of applying maximum current instantly, the current profile increases gradually, allowing the actuator to accelerate the valve pin and sealing element controlledly. This parameter change strategy achieves fast response times while reducing mechanical stresses and wear on valve components.
Solution Approach 2:
The patent applies dynamics by implementing a time-varying current profile that optimizes the actuation process. The current increases progressively during the actuation cycle, enabling fast valve response while controlling the acceleration and impact forces on valve components. This dynamic control reduces wear on the pin, sealing element, and valve seat compared to sudden high-current actuation.
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 minimizes noise and wear on the valve while maintaining fast and reliable operation, enabling quiet and efficient valve control in high-pressure environments.
Implementation Method 1
an actuator (42) with an actuator force (F2), which counteracts the spring force (F1)
Data Source
AI summary
A method is provided for controlling a valve having a spring, a pin, and an actuator for actuating the pin. A current having a specified current profile is applied to the actuator, starting from an initial current value at which the pin is in an initial position in which the pin allows the valve to move between open and closed positions. The current profile includes a section or several consecutive sections, wherein each section defines an initial current value and a final current value, a first time interval having a continuously falling current, and a subsequent second time interval having a continuously rising current. For each section, the final current value is less than the initial current value. After the specified current profile has been passed through, the pin is in a final position in which the pin prevents the valve from moving between open and closed positions.