Shock Absorber Valve Temperature Feedback for Suspension Reliability

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Solution Overview

Problem

Existing vehicle suspension systems lack effective methods to ensure stable and timely shock absorption performance while protecting components from high temperature damage.

Innovation Solution

A vehicle suspension control system that incorporates an electromagnetic valve with a temperature sensing circuit, allowing the controller to monitor and adjust operations based on temperature thresholds, preventing damage by stopping the electromagnetic valve when excessive heat is detected.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the electromagnetic valve operates continuously to maintain shock absorption performance, then the shock absorption function is improved, but the electromagnetic valve may overheat and cause damage or oil leakage

Engineering Contradiction:
Improveshock absorption performanceVSAvoidelectromagnetic valve temperature
Core Design Contradiction:
ReliabilityVSTemperature

Solution Approach 1:

The temperature sensing circuit proactively monitors the electromagnetic valve temperature before overheating damage occurs. By detecting temperature changes in advance and triggering protective actions, the system prevents the harmful effect of overheating while maintaining reliable shock absorption performance during normal operation

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The temperature sensing circuit provides real-time feedback on the electromagnetic valve temperature to the control system. This feedback mechanism enables the controller to adjust the electromagnetic valve operation dynamically, stopping or reducing operation when temperature thresholds are approached, thus preventing overheating damage while maintaining optimal shock absorption when conditions permit

Inventive Principle:
Principle #23Feedback

2Reliability

If the temperature monitoring is added to prevent electromagnetic valve damage, then the reliability is improved, but the system complexity increases

Engineering Contradiction:
Improveelectromagnetic valve protectionVSAvoidcontrol system structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The temperature sensing circuit is integrated with the existing electromagnetic valve control circuit, sharing common components such as the controller and power supply. This merging approach adds temperature monitoring functionality while minimizing the increase in overall system complexity and component count

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The control system is designed with multi-functionality, where the existing controller not only manages the electromagnetic valve operation for shock absorption but also processes temperature data from the sensing circuit. This universal approach allows one component to perform multiple functions, reducing the need for additional dedicated hardware and simplifying the overall system structure

Inventive Principle:
Principle #6Universality (Multi-functionality)

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

Ensures timely and accurate temperature monitoring of the electromagnetic valve, preventing damage and oil leakage, thus maintaining shock absorber performance and enhancing vehicle suspension control.

Implementation Method 1

the electromagnetic valve includes an electrical signal transmission assembly and an oil passage opening control assembly, and the electrical signal transmission assembly of the electromagnetic valve adjusts the oil passage opening control assembly of the electromagnetic valve based on the control signal

Methodology Applied
Scientific EffectElectromagnetic actuation: Electromagnet

Implementation Method 2

the controller is configured as: when detecting temperature of the electrical signal transmission assembly of the electromagnetic valve exceeding a first temperature threshold

Methodology Applied
Scientific EffectElectrical resistance temperature sensing: Electrical Resistance

Data Source

PatentEP4644141A1Vehicle suspension control system
Publication Date: 2025.11.05 SHANGHAI BAOLONG AUTOMOTIVE CORP
  • EP4644141A1 patent drawingFigure 1
  • EP4644141A1 patent drawingFigure 2A~2B
  • EP4644141A1 patent drawingFigure 3

AI summary

The present invention provides a vehicle suspension control system, comprising: a controller, which provides a control signal; a shock absorber, comprising a hydraulic module and an electromagnetic valve, some or all oil supply passages of the hydraulic module passing through the electromagnetic valve; the electromagnetic valve comprises an electrical signal transmission assembly and an oil passage opening control assembly, the electrical signal transmission assembly of the electromagnetic valve adjusting the oil passage opening control assembly of the electromagnetic valve on the basis of the control signal, so as to control oil supply of the hydraulic module; an electromagnetic valve control and temperature sensing circuit, controlling operation of the electromagnetic valve, performing temperature sensing on the electrical signal transmission assembly of the electromagnetic valve, and transmitting a temperature sensing parameter to the controller; the controller is configured to send a corresponding control signal to terminate operation of the electromagnetic valve when it is detected that the temperature of the electrical signal transmission assembly of the electromagnetic valve exceeds a threshold. The present invention can perform timely and accurate monitoring of the temperature of an electromagnetic valve while performing a shock control operation on the electromagnetic valve of the shock absorber.