Apparatus and control method for a magnetic powder clutch
First Claim
1. A control method for a magnetic powder clutch system including a magnetic powder clutch having an input shaft connected to an engine and an output shaft, comprising the steps of:
- determining an energizing strength of the magnetic powder clutch based on a target transmitting torque;
correcting the energizing strength with a correction factor determined based on a specific powder clutch;
energizing the magnetic powder clutch with the corrected energizing strength;
determining an actual transmitting torque of the magnetic powder clutch when a change in a detected transmitting torque is smaller than a preset value;
calculating a difference between the target transmitting torque and the actual transmitting torque; and
updating the correction factor according to the calculated difference.
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Abstract
Disclosed is a control method and controller for a magnetic powder clutch system including a magnetic powder clutch having an input shaft connected to an engine and an output shaft. In the method, the magnetic powder clutch is energized by an energizing strength which is determined based on a target transmitting torque. The energizing strength is compensated with a predetermined correction factor to realize high accuracy control. Moreover, the correction factor is always updated in response to an error between the target transmitting torque and the detected actual transmitting torque.
33 Citations
5 Claims
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1. A control method for a magnetic powder clutch system including a magnetic powder clutch having an input shaft connected to an engine and an output shaft, comprising the steps of:
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determining an energizing strength of the magnetic powder clutch based on a target transmitting torque; correcting the energizing strength with a correction factor determined based on a specific powder clutch; energizing the magnetic powder clutch with the corrected energizing strength; determining an actual transmitting torque of the magnetic powder clutch when a change in a detected transmitting torque is smaller than a preset value; calculating a difference between the target transmitting torque and the actual transmitting torque; and updating the correction factor according to the calculated difference. - View Dependent Claims (2, 3)
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4. A controller for a magnetic powder clutch having an input shaft connected to an engine and an output shaft, comprising:
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an engine revolution speed detection means; an output shaft revolution speed detection means; an engine torque detection means; means for generating a target transmitting torque signal of the magnetic powder clutch based on a currently required engine output; means responsive to the target transmitting torque signal for determining an energizing strength of the magnetic powder clutch according to a correction factor; means for generating a minimal slip signal when a difference between the sensed engine revolution speed and the detected output shaft revolution speed is between 0 and a preset value; means responsive to the minimal slip signal for generating an actual transmitting torque signal from a sensed engine torque signal when a change in the engine revolution speed is smaller than a preset value; means for calculating a difference between the target transmitting torque signal and the actual transmitting torque signal; and means for updating the correction factor according to the calculated difference. - View Dependent Claims (5)
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Specification