Hydraulic Pressure Control Device with Dynamic Response Delay Correction
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Solution Overview
Problem
Existing hydraulic pressure control devices for vehicles often face issues with insufficient fluid inflow or outflow due to hardware variations, leading to response delays, and increasing control constants can compromise stability.
Innovation Solution
A hydraulic pressure control device that includes a judging portion to detect response delay times and an inflow or outflow amount correcting portion to increase fluid flow accordingly, ensuring sufficient fluid flow while maintaining control stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the control constant is increased to increase the fluid inflow or outflow amount, then the response speed is improved, but the control stability deteriorates
Solution Approach 1:
The control constant is made dynamically adjustable rather than fixed. The judging portion monitors the actual response delay time in real-time, and the inflow or outflow amount correcting portion adjusts the control constant accordingly. This dynamic adjustment allows the system to optimize response speed while maintaining control stability under varying operating conditions and hardware variations.
Solution Approach 2:
The control constant parameter is changed based on the judged response delay time. When the response delay time exceeds the allowable delay time, the control constant is increased to accelerate the response. This parameter change strategy enables the system to adapt to hardware variations and ensure sufficient fluid flow while preventing excessive control constant values that would compromise stability.
2Productivity
If the control constant is set to the maximum value to ensure sufficient fluid flow, then the response speed is improved, but the control stability deteriorates
Solution Approach 1:
The control constant is adjusted based on the judged response delay time rather than being set to a fixed maximum value. This parameter change approach ensures that the control constant is increased only when necessary to achieve sufficient fluid flow, thereby maintaining control stability while improving productivity.
Solution Approach 2:
The judging portion provides feedback on the actual response delay time to the inflow or outflow amount correcting portion. This feedback mechanism allows the system to determine whether the current control constant is sufficient or needs adjustment, enabling precise control of fluid flow while maintaining stability.
3Stability of the object's composition
If the control constant is decreased to maintain control stability, then the control stability is improved, but the response speed deteriorates
Solution Approach 1:
The control constant is dynamically adjusted based on the judged response delay time. When the response delay time is within the allowable range, a smaller control constant is used to maintain control stability. When the response delay time exceeds the allowable range, the control constant is increased to improve response speed. This dynamic adjustment resolves the contradiction between stability and speed.
Data Source
AI summary
The hydraulic pressure control device controls a valve part for adjusting the inflow/outflow of a fluid into and out of a hydraulic pressure chamber formed in a braking device to control the actual hydraulic pressure of the fluid in the hydraulic pressure chamber, to a target hydraulic pressure of the actual hydraulic pressure and includes a determination unit which determines whether a response delay time of the actual hydraulic pressure is equal to or greater than a prescribed permitted delay time and an inflow/outflow quantity correction unit which executes increase correction processing in which the valve part is controlled to increase the inflow/outflow quantity of the fluid in the hydraulic pressure chamber when the determination unit has determined that the response delay time is equal to or greater than the permitted delay time.