Clutch Condition Detection via Engine Torque Pulses
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Solution Overview
Problem
Existing methods for detecting clutch condition, such as evaluating engine torque and wheel speeds, become unreliable during extreme driving situations like ABS braking due to high dynamic wheel conditions, leading to ambiguous information.
Innovation Solution
Applying a temporary engine torque pulse and evaluating the engine's response against predefined characteristic curves, while also measuring and correlating wheel speed to determine if the clutch is engaged or disengaged, using a control unit with a stored algorithm to differentiate between conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If engine torque and wheel speeds are evaluated under normal conditions, then clutch condition detection is sufficient, but detection reliability deteriorates during ABS braking due to high dynamic wheel conditions
Solution Approach 1:
The system applies a preliminary torque pulse to the engine before evaluating clutch condition, creating a known disturbance that elicits a measurable response. This preliminary action allows the system to proactively generate detectable signals even in extreme driving situations where passive observation fails.
Solution Approach 2:
The system evaluates the engine's speed response feedback after applying a torque pulse to determine clutch condition. By monitoring how the engine speed changes in response to the applied torque, the system可以获得 reliable clutch status information even during ABS braking when wheel-based methods fail.
2Measurement precision
If wheel slip is high and engine speed is low, then drive torque pulse should be triggered to maintain detection accuracy
Solution Approach 1:
The system dynamically changes the type of torque pulse applied (drive or drag) based on real-time parameters such as wheel slip and engine speed. When wheel slip exceeds a threshold and engine speed is low, the system switches to applying a drive torque pulse, optimizing the detection method for current operating conditions.
Solution Approach 2:
The detection system dynamically adapts its operation mode based on current driving conditions. The control unit continuously monitors wheel slip and engine speed parameters, and automatically adjusts the torque pulse application strategy to maintain optimal detection precision under varying conditions.
Data Source
AI summary
A method for detecting the clutch condition in engine-powered vehicles. To ensure a reliable detection of the clutch condition even in extreme driving situations, the engine torque of at least one vehicle engine is increased or reduced automatically by pulses and the response of the engine to the torque pulse is evaluated.