Electromagnetic Valve Actuation for Noise Reduction
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Solution Overview
Problem
High-pressure valves in common rail injection systems face challenges in efficient pressure regulation, leading to noise and mechanical wear due to high acceleration values during fast opening and closing, which is not effectively managed by existing magnetically controlled pressure reduction valves.
Innovation Solution
A method for operating a pressure reduction valve using an electromagnetic drive with a defined electrical signal, where the current intensity profile over time is sensed, and the movement profile of the closure element is determined to optimize signal intensity and duration, allowing for low-noise and reduced mechanical wear operation by selecting the appropriate signal intensity that achieves the desired reaction time with minimal kinetic energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the valve is activated with high acceleration values to achieve fast opening and closing, then the reaction time is improved, but noise and mechanical wear increase
Solution Approach 1:
The patent applies periodic action by using a multi-phase current signal with different amplitude levels during the actuation cycle. The current signal transitions through multiple stages (initial high amplitude for rapid response, followed by reduced amplitude phases), creating a time-varying electromagnetic force that achieves fast valve response while controlling acceleration peaks that cause noise and wear
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting the current amplitude and signal characteristics during valve actuation. The control system modifies electrical parameters (current intensity, pulse duration, signal frequency) to optimize the balance between rapid valve response and minimized mechanical stress, thereby reducing noise and wear while maintaining fast reaction time
2Measurement precision
If the valve is opened and closed digitally between fully opened and fully closed positions, then the control precision is improved, but the mechanical stress and wear increase
Solution Approach 1:
The patent applies partial action by using intermediate current amplitudes during different phases of valve actuation rather than maintaining maximum amplitude throughout. The initial phase uses higher current for rapid positioning, followed by reduced current levels that maintain control precision while significantly reducing the mechanical stress and kinetic energy impacting the valve components
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 enables the valve to operate with reduced noise and wear by identifying the optimal signal intensity that balances reaction time and kinetic energy, ensuring efficient and reliable valve actuation while minimizing unwanted noise and mechanical stress.
Implementation Method 1
the valve (10) has a valve opening (12) and a closure element (13) which can be driven, against the force of a return spring element (16), by means of an electromagnetic drive (14, 15) with an energizable coil (15) and a magnetically drivable armature (14)
Data Source
AI summary
The present disclosure relates to the field of electromechanics. The teachings may be applied to high-pressure valves, including methods for operating a valve and with devices which are used for activating the valves. Some embodiments include methods for operating a pressure reduction valve for an accumulator injection system, wherein the valve is driven, against a return spring, with an energizable coil and armature, between a closed position and an open position. The method may include: supplying the coil with a defined electrical signal to move the armature, sensing the current intensity profile over time, and determining a movement profile for the defined current signal, including an opening or closing time, based at least in part on the current intensity profile over time.