Vehicle Height Control via Dynamic Valve Passage Switching
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Solution Overview
Problem
Existing vehicle height control systems face challenges in efficiently managing communication between a high-pressure source and multiple vehicle height control actuators, particularly in adjusting the flow rate to suit varying numbers of wheels and target vehicle heights, leading to suboptimal vehicle height adjustment times and stability during changes.
Innovation Solution
A vehicle height control system that includes a common passage and electromagnetic valve device with multiple communication states, allowing the high-pressure source to communicate with the common passage via different passages based on start conditions, target vehicle heights, and the number of wheels to be controlled, optimizing fluid flow and actuator communication for efficient height adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the high-pressure source communicates with the common passage via a single fixed passage, then the system structure is simple, but the vehicle height adjustment time increases and stability deteriorates when the number of wheels to be controlled varies
Solution Approach 1:
The system dynamically switches between different communication states (first communication state with both passages open, second communication state with only one passage open) based on the number of wheels to be controlled. This dynamic adjustment of the electromagnetic valve device allows optimization of fluid flow rate according to actual control needs, improving vehicle height adjustment speed without requiring a completely different system structure for each scenario.
Solution Approach 2:
The system changes the flow rate parameter by switching between different communication states of the electromagnetic valve device. When more wheels need control, the first communication state provides higher flow rate through both passages. When fewer wheels need control, the second communication state reduces flow rate through one passage only. This parameter change approach optimizes adjustment speed matching the control requirements.
2Productivity
If fluid flow rate is increased to reduce adjustment time, then vehicle height adjustment speed improves, but shock increases and stability deteriorates
Solution Approach 1:
The system dynamically adjusts the communication state of the electromagnetic valve device based on the number of wheels to be controlled. This dynamic adjustment ensures that the flow rate is optimized for the specific control scenario - higher flow when more wheels are controlled (reducing adjustment time), and lower flow when fewer wheels are controlled (reducing shock and improving stability).
Solution Approach 2:
The system changes the fluid flow rate parameter by switching between communication states. The first communication state provides higher flow rate for faster adjustment when multiple wheels need control. The second communication state provides lower flow rate to reduce shock and improve stability when fewer wheels need control. This parameter adaptation resolves the contradiction between speed and stability.
3Adaptability or versatility
If the electromagnetic valve device operates in a fixed communication state, then the device complexity is low, but the adaptability to different control scenarios deteriorates
Solution Approach 1:
The electromagnetic valve device is designed with dynamic switching capability between first and second communication states based on the number of wheels to be controlled. This dynamic design provides adaptability to different control scenarios (single wheel, multiple wheels, all four wheels) without requiring completely different hardware configurations for each scenario.
Solution Approach 2:
The electromagnetic valve device serves multiple functions by operating in different communication states. The same physical device structure can provide high flow rate operation (first communication state) or low flow rate operation (second communication state) depending on control requirements. This multi-functionality achieves high adaptability without proportionally increasing device complexity.
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 system enables communication between the high-pressure source and vehicle height control actuators in a state suitable for the specific control requirements, reducing the time needed for vehicle height adjustments and enhancing stability by optimizing fluid flow rates according to the number of wheels and target heights, thus improving the overall efficiency and ergonomics of vehicle height control.
Implementation Method 1
The electromagnetic valve device includes (a) a high-pressure source, (b) a plurality of passages including a first passage and a second passage that connect the high-pressure source to the common passage in parallel with each other, and (c) at least one electromagnetic valve provided in each of the first passage and the second passage
Data Source
AI summary
A vehicle height control system includes a fluid feeder and a vehicle height control unit. The vehicle height control unit includes a communication control unit. In a first communication state, a high-pressure source and a common passage are made to communicate with each other via the first passage and the second passage. In a second communication state, the first passage is shut off and the high-pressure source and the common passage are made to communicate with each other via the second passage. The communication control unit selects one from among the plurality of communication states based on at least one of a content of a start condition, a target vehicle height of a height increasing control and a number of wheels to be controlled in the height increasing control, when the start condition of the height increasing control is satisfied.