Clutch Judder Prevention via Accelerator Position Memory
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Solution Overview
Problem
Existing automatic clutch control systems for large vehicles often result in clutch judder during start-up, causing driver discomfort, fatigue, and potential damage to goods due to abnormal vibrations, and require excessive driver attention to prevent.
Innovation Solution
A vehicle start-up control mechanism featuring a clutch judder detection device, accelerator opening measurement, and a control unit that stores and compares accelerator positions to adjust the accelerator opening during subsequent starts, preventing clutch judder by modifying the accelerator opening to avoid judder-inducing conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If automatic clutch control is used during start-up, then driver operation is simplified, but clutch judder occurs causing driver discomfort and fatigue
Solution Approach 1:
The control unit stores accelerator opening information from previous start-ups where clutch judder occurred. Before the next start-up, it compares the current accelerator opening with stored values and preemptively adjusts the accelerator opening signal to avoid conditions that would cause clutch judder, preventing the problem before it occurs.
Solution Approach 2:
The system uses feedback from past clutch judder occurrences by storing accelerator opening data in memory. The control unit continuously monitors and compares current accelerator opening with historical data, using this feedback information to automatically adjust and optimize accelerator opening during subsequent start-ups, eliminating clutch judder while maintaining automatic operation benefits.
2Object-affected harmful factors
If clutch control is adjusted to prevent judder, then driver comfort improves, but driver becomes overly cautious and nervous during start-up
Solution Approach 1:
The control system performs self-adjustment by automatically comparing current accelerator opening with stored historical data and autonomously optimizing the accelerator opening signal. This eliminates the need for the driver to manually adjust or pay excessive attention to clutch operation, allowing the driver to operate naturally without becoming nervous or overly cautious while still preventing clutch judder.
3Object-affected harmful factors
If accelerator opening is changed to prevent clutch judder, then clutch connection becomes smooth, but system complexity increases
Solution Approach 1:
The control unit leverages existing components (accelerator opening sensor, clutch position sensor, memory storage) to perform multiple functions: normal clutch control, judder detection, historical data storage, comparison analysis, and automatic optimization. By making these existing components multi-functional, the system prevents clutch judder through accelerator opening adjustment without adding significant structural complexity.
Data Source
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AI summary
An object is to provide a vehicle start-up control mechanism capable of preventing the occurrence of clutch judder with no need of paying excessive attention thereto for a driver. For this purpose, the present invention is provided with a clutch judder detection device (1) for detecting the occurrence of clutch judder, a clutch state detection device (3) for detecting a partially engaged clutch state, and a control unit (10), wherein the control unit (10) has a function for storing an accelerator opening(position) in the partially engaged clutch state in a case where the clutch judder has occurred during start-up and a function for comparing an accelerator opening during next start-up with an accelerator opening in a case where the clutch judder has occurred during previous start-up.