Throttle Valve Driving Amount Controller Response Delay
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Solution Overview
Problem
Existing throttle valve control systems in motorcycles and four-wheel vehicles experience response delays and erroneous deviations due to hysteresis characteristics and speed variations, which are not adequately addressed by existing devices.
Innovation Solution
A driving amount controller that adjusts motor output by varying the output characteristic of control signals based on speed variations, using a positive quadratic function to enhance response performance and prevent overshoot, by increasing motor output during rapid acceleration and slowing down motor output during rapid deceleration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the throttle valve is energized by the motor and return spring to regulate opening, then the valve opening can be controlled, but response delay and erroneous deviation occur in the control of throttle valve opening
Solution Approach 1:
The control device calculates speed variation of the target opening ahead of time and uses this information to adjust the motor output in advance. When speed variation is detected, the control device proactively increases motor output during acceleration or suppresses decrease during deceleration, preventing response delays before they occur.
Solution Approach 2:
The control device continuously monitors the speed variation of the target opening and uses this feedback to dynamically adjust the motor output. By calculating the rate of change of the target opening, the system creates a closed-loop control that responds to actual system behavior, eliminating response delays and erroneous deviations.
2Speed
If the motor output is increased rapidly during acceleration, then response performance improves, but overshoot and erroneous deviation may occur
Solution Approach 1:
The control device dynamically adjusts the motor output based on the real-time speed variation of the target opening. Rather than using a fixed control strategy, the system adapts its output characteristics to the current operating conditions, increasing output during acceleration and suppressing decrease during deceleration, thereby maintaining both responsiveness and stability.
Solution Approach 2:
The control device changes the output parameters of the motor based on the calculated speed variation of the target opening. By modifying the motor output characteristic according to the rate of change of the target opening, the system optimizes both response speed and stability, preventing overshoot while maintaining rapid response capability.
Data Source
AI summary
A driving amount controller for reducing a response delay or erroneous deviation in control of a driving amount of a controlled system. The driving amount controller includes an ECU that increases an add-in amount to a duty ratio DUT of a control signal according to an increase in the speed variation ΔDTHR of a target opening DTRH of the throttle valve 16 when the speed variation ΔDTHR is positive. In addition, the ECU increases the add-in amount to the duty ratio DUT of the control signal according to a decrease in the speed variation ΔDTHR when the speed variation ΔDTHR is negative. A throttle valve on a vehicle is an example of the controlled system.