Clutch Control Apparatus Temperature Sensor Correction
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Solution Overview
Problem
Existing clutch control systems face accuracy issues due to temperature fluctuations caused by friction, leading to inaccurate timing in clutch connection and disconnection operations.
Innovation Solution
A clutch control apparatus that includes a temperature sensor to measure the temperature of the driven mechanism, allowing for correction of the control target value and precise control of clutch capacity, thereby reducing temperature effects and enhancing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If heat generation amount is estimated based on friction between plates, then control can be performed without additional sensors, but measurement precision deteriorates due to estimation errors
Solution Approach 1:
The patent introduces a temperature sensor as an intermediary device that directly measures the temperature of the driven mechanism. This mediator provides accurate temperature data without requiring complex estimation calculations, resolving the contradiction between measurement precision and device complexity by using a simple, direct measurement approach
Solution Approach 2:
The patent replaces the mechanical/thermal estimation method (calculating heat generation from friction) with a direct sensing method (temperature sensor measurement). This substitution eliminates estimation errors while maintaining simple device architecture, achieving both high precision and low complexity
2Manufacturing precision
If estimation value of heat generation amount is used for control, then device complexity is reduced, but control accuracy deteriorates due to difference between estimation and actual temperature
Solution Approach 1:
The patent implements feedback control by continuously measuring the actual temperature of the driven mechanism and using this information to correct the control target value. The feedback loop ensures that control decisions are based on real temperature data rather than estimates, achieving high control accuracy while keeping the system simple
Solution Approach 2:
The patent substitutes the estimation-based control approach with a measurement-based control approach. By replacing friction-based heat generation estimation with direct temperature sensing, the system achieves superior control accuracy without adding significant complexity to the temperature measurement system
3Measurement precision
If temperature sensor is arranged close to driven mechanism, then measurement precision is improved, but device complexity increases due to additional components
Solution Approach 1:
The patent merges the temperature sensor with existing components of the clutch control apparatus, specifically integrating it into the driven mechanism assembly. This merging approach allows direct temperature measurement while avoiding the need for separate, additional sensor mounting structures, thus improving measurement precision without significantly increasing device complexity
Solution Approach 2:
The temperature sensor serves multiple functions: it measures driven mechanism temperature for control correction, monitors thermal conditions for safety, and provides data for maintenance scheduling. This multi-functionality justifies the addition of the sensor by delivering multiple benefits from a single component, resolving the contradiction between measurement precision and 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
The system achieves highly accurate control of clutch engagement and disengagement by directly measuring and adjusting for temperature changes, improving the timing and efficiency of clutch operations.
Implementation Method 1
a temperature sensor that measures a temperature of the driven mechanism
Data Source
AI summary
This clutch control apparatus includes: a clutch device that connects and disconnects a power transmission between an engine and a drive wheel; a clutch actuator that drives the clutch device and changes a clutch capacity; a driven mechanism that is arranged between the clutch actuator and the clutch device, is operated by a drive of the clutch actuator, and operates the clutch device; a control part that calculates a control target value of the clutch capacity; and a temperature sensor that measures a temperature of the driven mechanism, wherein the control part corrects the control target value based on the temperature measured by the temperature sensor.