Damper Control Device Current Reduction for Solenoid Valves
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Solution Overview
Problem
Conventional damper control devices experience increased power consumption and heat generation due to continuous high currents supplied to solenoid valves during both extension and contraction strokes, limiting their ability to generate thrust effectively.
Innovation Solution
A damper control device that performs extension-side and compression-side reduction corrections by adjusting the currents supplied to the solenoid valves based on the extension/contraction speed, reducing unnecessary current supply during strokes where the solenoid valves do not affect damping force changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous high current is supplied to solenoid valves during both extension and contraction strokes, then pressure control is maintained, but power consumption increases and heat generation occurs
Solution Approach 1:
The patent applies dynamics by making the current supply to solenoid valves conditional on the damper's operational state. The control device dynamically adjusts current supply based on whether the damper is in extension or contraction stroke, transitioning from static continuous supply to dynamic state-dependent supply. This resolves the contradiction by maintaining pressure control reliability only when necessary (during extension) while reducing power consumption during contraction when the solenoid valve does not affect damping force.
Solution Approach 2:
The patent changes the parameter of current supply from constant high value to variable value based on operational state. During extension stroke, high current is supplied to maintain pressure control, but during contraction stroke, current is reduced or stopped since the solenoid valve does not influence damping force. This parameter change resolves the technical contradiction by optimizing the balance between pressure control reliability and power consumption.
2Reliability
If large current is continuously supplied to solenoid valves, then pressure control is maintained, but heat generation increases and thrust capability is reduced
Solution Approach 1:
The patent implements periodic action by supplying large current to solenoid valves only during specific periods (extension stroke) when it is needed for pressure control, rather than continuously. During contraction stroke, the current is reduced or stopped. This periodic current supply pattern maintains pressure control reliability when required while significantly reducing heat generation and improving thrust capability by eliminating unnecessary continuous current supply.
3Reliability
If current is supplied to solenoid valves during contraction stroke, then pressure feedback loop operates, but power consumption increases without affecting damping force
Solution Approach 1:
The patent extracts the unnecessary pressure feedback control function during contraction stroke. Since the solenoid valve does not affect damping force during contraction, the patent removes (takes out) the active pressure control operation during this phase, allowing the pressure feedback loop to operate only during extension stroke where it is effective. This resolves the contradiction by eliminating wasted power consumption while maintaining effective damping force control efficiency.
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 reduces power consumption, decreases heat generation, and enhances the thrust of solenoid valves, improving the overall efficiency and riding comfort of the vehicle by optimizing current usage based on the damper's operational state.
Implementation Method 1
an extension-side solenoid valve that adjusts the pressure within an extension-side chamber, and a compression-side solenoid valve that adjusts the pressure within a compression-side chamber
Implementation Method 2
a method in which the pressures of the extension-side chamber and the compression-side chamber are detected, and these pressures are fed back to regulate currents supplied to the extension-side solenoid valve and the compression-side solenoid valve
Data Source
AI summary
A damper control device feeds back a pressure within an extension-side chamber to control an extension-side solenoid valve that adjusts the pressure within the extension-side chamber, and feeds back a pressure within a compression-side chamber to control a compression-side solenoid valve that adjusts the pressure within the compression-side chamber. The damper control device performs a compression-side reduction correction which reduces a compression-side current supplied to the compression-side solenoid valve during extension of a damper, and performs an extension-side reduction correction which reduces an extension-side current supplied to the extension-side solenoid valve during contraction of the damper.