Electric Pump Solenoid Control for Vibration Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric pump systems struggle to suppress vibration and noise while maintaining the required supply of working fluid to driving targets, particularly in unbalanced variable displacement vane pumps.
Innovation Solution
An electric pump system that includes a control device to adjust the operation of a solenoid valve and electric motor based on vibration detection, using sensors to determine resonance conditions and adjust the discharge flow rate and pressure to prevent vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the pump discharge capacity is controlled by operating the switching valve to move the cam ring, then the required working fluid can be supplied to the driving target object, but vibration and noise are generated in the electric pump system
Solution Approach 1:
The invention dynamically adjusts the pump discharge capacity by controlling the solenoid valve opening degree in real-time based on vibration detection, rather than using fixed mechanical positioning of the cam ring. This dynamic control allows the system to adapt to varying vibration conditions and maintain optimal operation while suppressing vibration and noise.
Solution Approach 2:
The invention changes the control parameter from mechanical cam ring position to solenoid valve opening degree, which can be precisely controlled and adjusted. By varying the opening degree of the solenoid valve, the discharge flow rate can be continuously adjusted while avoiding vibration-generating operating conditions, thus resolving the contradiction between flow rate control and vibration suppression.
2Quantity of substance
If the pump discharge capacity is controlled by operating the switching valve to move the cam ring, then the required working fluid can be supplied to the driving target object, but noise is generated in the electric pump system
Solution Approach 1:
The system dynamically adjusts the solenoid valve opening degree based on real-time vibration detection, allowing continuous optimization of the discharge flow rate while avoiding noise-generating operating conditions. This dynamic approach enables the system to maintain required fluid supply while suppressing noise.
Solution Approach 2:
The invention implements a feedback control mechanism where vibration sensors detect vibration levels, and the control device adjusts the solenoid valve opening degree accordingly. This closed-loop feedback system ensures that the discharge flow rate is maintained while vibration and noise are suppressed by avoiding resonant and high-vibration operating conditions.
3Quantity of substance
If the solenoid valve opening degree is adjusted to control discharge flow rate, then the required working fluid can be supplied, but vibration occurs at specific opening degrees
Solution Approach 1:
The system dynamically adjusts the solenoid valve opening degree based on real-time vibration detection, allowing continuous optimization of the discharge flow rate while avoiding vibration-generating operating conditions. This dynamic approach enables the system to maintain required fluid supply while suppressing vibration.
Solution Approach 2:
The invention implements a feedback control mechanism where vibration sensors detect vibration levels at different opening degrees, and the control device adjusts the opening degree to avoid resonant conditions. This closed-loop feedback ensures that the discharge flow rate is maintained while vibration is suppressed by selecting optimal opening degrees.
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
Effectively suppresses vibration and noise in the electric pump system and its driving targets by adjusting the operation of the solenoid valve and electric motor, ensuring stable fluid supply.
Implementation Method 1
a pump configured such that a discharge flow rate is controlled in accordance with an opening degree of a solenoid valve, operation of the solenoid valve being controlled by energization
Implementation Method 2
the determination condition being set based on vibration generated in the electric pump system or the driving target object
Data Source
AI summary
An electric pump system includes: a pump configured such that a discharge flow rate is controlled in accordance with an opening degree of a solenoid valve, the operation of the solenoid valve being controlled by energization; an electric motor configured to drive the pump; and a control device configured to control the operations of the solenoid valve of the pump and the electric motor based on the command signal indicating the required discharge flow rate or the required discharge pressure of the pump. The control device is configured to adjust the operations of the solenoid valve and the electric motor when the determination condition, which is for determination of whether a predetermined vibration is generated in the electric pump system or the CVT, is satisfied.