Speed-Based Clutch Modulation for Torque Control
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Solution Overview
Problem
Existing machine control systems with impeller clutches experience sluggish torque modulation at low engine speeds due to sub-optimal force application, leading to reduced operational consistency and increased complexity, particularly in systems with multiple pressure curves and manual activation.
Innovation Solution
A machine control system that includes a sensor to generate a signal indicative of the power source's speed and a controller to vary the actuation force of the clutch based on this signal, allowing for adaptive modulation of the impeller clutch engagement, thereby improving responsiveness and reducing operator burden.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the force applied to the clutch is set for high idle speed, then the clutch remains engaged and transmits substantially all torque at high idle speed, but the force must be greatly reduced before any clutch slippage occurs at lower engine speeds, resulting in sluggish torque modulation
Solution Approach 1:
The patent applies dynamics by making the clutch actuation force variable rather than fixed. The system dynamically adjusts the clutch actuation force based on real-time engine speed feedback, transitioning from a static force application to a dynamic, adaptive control mechanism that responds to changing operating conditions
Solution Approach 2:
The patent implements feedback control by using a sensor to detect engine speed and feeding this information back to the controller. The controller then adjusts the clutch actuation force based on the detected engine speed, creating a closed-loop control system that automatically adapts to varying engine speeds without operator intervention
2Reliability
If multiple impeller clutch pressure curves are stored in memory for different engine speeds, then operational consistency across varying engine speeds is improved, but the cost and complexity of the system increases
Solution Approach 1:
The patent applies parameter changes by continuously varying the clutch actuation force parameter based on engine speed. Rather than storing multiple discrete pressure curves, the system changes the actuation force parameter in real-time according to the detected engine speed, providing continuous adaptation with simpler implementation
Solution Approach 2:
The patent implements self-service by enabling the control system to automatically adjust clutch actuation based on detected engine speed without requiring operator selection or external input. The system serves itself by using its own sensor data to automatically control the clutch, eliminating the need for manual curve selection or complex operator interfaces
3Ease of operation
If the clutch actuation force is manually adjusted for different engine speeds, then torque modulation responsiveness is improved, but the operator burden increases and delays occur in machine operation
Solution Approach 1:
The patent implements self-service by enabling the control system to automatically adjust clutch actuation based on detected engine speed without requiring operator selection or external input. The system serves itself by using its own sensor data to automatically control the clutch, eliminating the need for manual curve selection or complex operator interfaces
Solution Approach 2:
The patent replaces the manual mechanical adjustment system with an automated electronic control system. The sensor and controller substitute for manual operator actions, using electronic signals to adjust the clutch actuation force, thereby eliminating mechanical delays and operator response time
Data Source
AI summary
A machine control system for use with a machine having a power source and a transmission is disclosed. The machine control system may have a clutch configured to connect an output of the power source with an input of the transmission. The machine control system may also have a sensor configured to generate a signal indicative of a speed of the power source, and a controller in communication with the clutch and the sensor. The controller may be configured to vary an actuating force of the clutch based on the signal.