Suspension Arm Acceleration Sensor Mounting for Utility Vehicles
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Solution Overview
Problem
Utility vehicles traveling on uneven terrains experience discomfort due to varying road shocks and irregular vibrations, leading to delayed detection and inaccurate control responses.
Innovation Solution
The integration of an acceleration sensor mounted on the suspension device's arm, which connects the wheel to the vehicle body frame, allowing for earlier shock detection and reduced time lag in recording and responding to road shocks, thereby improving responsiveness and accuracy of control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the acceleration sensor is mounted on the vehicle body frame, then the detection structure is simple, but the detection delay increases and control accuracy deteriorates
Solution Approach 1:
The patent introduces an intermediary mounting structure that couples the acceleration sensor to the wheel assembly through the suspension system. The sensor is mounted on the vehicle body frame but connected via a coupling mechanism that transmits wheel shock signals, serving as a mediator between the wheel and the fixed mounting position.
Solution Approach 2:
The coupling structure is designed to pre-position the acceleration sensor in optimal detection alignment with the wheel shock transmission path. By preliminarily configuring the sensor's detection orientation and position through the coupling mechanism, the system achieves accurate shock detection without requiring real-time adjustment.
2Measurement precision
If the acceleration sensor is mounted closer to the wheel, then shock detection accuracy improves, but the sensor becomes more exposed to foreign matter
Solution Approach 1:
The patent divides the sensor mounting function into two separate components: the acceleration sensor remains mounted on the protected vehicle body frame, while the coupling structure transmits shock signals from the wheel. This segmentation allows the sensor to stay in a protected environment while still detecting wheel shocks accurately through the coupling mechanism.
Solution Approach 2:
The coupling structure serves as an intermediary that transmits shock signals from the wheel to the acceleration sensor without requiring the sensor to be physically exposed to the wheel environment. This mediator protects the sensor from foreign matter while maintaining detection accuracy.
3Reliability
If the shock absorber absorbs shock before detection, then ride comfort is maintained, but detection accuracy and responsiveness deteriorate
Solution Approach 1:
The coupling structure is designed to transmit shock signals to the acceleration sensor before the shock absorber fully absorbs the shock energy. By preliminarily detecting the shock through the coupling mechanism during its initial transmission phase, the system achieves accurate and responsive shock detection.
Solution Approach 2:
The coupling structure maintains continuous transmission of shock signals from the wheel to the acceleration sensor throughout the shock absorption process. This continuous signal transmission ensures that the shock is detected at the optimal moment before being absorbed, maintaining both detection accuracy and control responsiveness.
Data Source
AI summary
A utility vehicle includes a wheel, a vehicle body frame supported by the wheel, a suspension device connecting the wheel to the vehicle body frame, and an acceleration sensor mounted on the suspension device. The suspension device includes: a below-shock absorber member including an arm swingably connecting the wheel to the vehicle body frame; and a shock absorber connecting the below-shock absorber member to the vehicle body frame. The acceleration sensor is mounted on the arm.