MANUAL TRANSMISSION CLUTCH CONTROL USING MEASURED TORQUE
First Claim
1. A method for controlling a manual transmission gearshift, comprising:
- (a) using a controller to determine a desired clutch torque transmitted through a transmission input clutch for a desired gear after a shift lever is moved to a desired gear position and while a clutch pedal is being released;
(b) measuring torque in a vehicle drive assembly;
(c) using the measured torque to determine actual torque transmitted through the clutch as the clutch slips;
(d) reducing clutch torque error using the controller to adjust a clutch actuator such that a difference between the desired clutch torque and the actual clutch torque is reduced.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for controlling a manual transmission includes using a controller to determine a desired torque transmitted through an input clutch and a desired clutch slip for the desired gear after a shift lever is moved to a desired gear position and while a clutch pedal is being released for engaging the clutch; measuring torque in the vehicle drive assembly; using measured torque to determine actual clutch torque transmitted through the clutch; and reducing torque error using the controller to adjust a clutch actuator such that a difference between the desired torque and the actual torque is reduced. Slip error may also be reduced by adjusting the clutch actuator to reduce the difference between the desired slip and measured slip.
10 Citations
20 Claims
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1. A method for controlling a manual transmission gearshift, comprising:
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(a) using a controller to determine a desired clutch torque transmitted through a transmission input clutch for a desired gear after a shift lever is moved to a desired gear position and while a clutch pedal is being released; (b) measuring torque in a vehicle drive assembly; (c) using the measured torque to determine actual torque transmitted through the clutch as the clutch slips; (d) reducing clutch torque error using the controller to adjust a clutch actuator such that a difference between the desired clutch torque and the actual clutch torque is reduced. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for controlling a manual transmission gearshift, comprising:
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(a) using a controller to determine a desired clutch torque transmitted through a transmission input clutch for a desired gear, after a shift lever is in a desired gear position for a gearshift, a clutch pedal is depressed and thereafter released, and an accelerator pedal is released and thereafter depressed; (b) measuring torque in at least one location in a vehicle drive assembly; (c) using the measured torque to determine actual torque transmitted through the clutch; (d) reducing clutch torque error using the controller to adjust a clutch actuator such that a difference between the desired clutch torque and the actual clutch torque is reduced. - View Dependent Claims (10, 11, 12)
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13. A method for controlling a manual transmission gearshift, comprising:
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(a) using a controller to unlock a shift lever after a switch state indicates a gearshift is desired and an accelerator pedal is released; (b) after the shift lever is moved to a new gear position, using the controller to determine a desired clutch torque transmitted through a transmission input clutch for the new gear position; (c) measuring torque in at least one location in a vehicle drive assembly; (d) using the measured torque to determine actual torque transmitted through the clutch; (e) reducing torque error using the controller to adjust a clutch actuator such that a difference between the desired clutch torque and the actual clutch torque is reduced. - View Dependent Claims (14, 15, 16, 17)
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18. A method for controlling a manual transmission, comprising:
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(a) using a controller to determine a desired slip across a transmission input clutch, after a clutch pedal is depressed and an accelerator pedal is released, a shift lever is in a desired position, and the clutch pedal and accelerator pedal are modulated; (b) measuring slip across the clutch; (c) reducing slip error using the controller to adjust a clutch actuator such that a difference between the desired slip and the measured slip is reduced. - View Dependent Claims (19, 20)
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Specification