Method and arrangement for controlling actual torque in a land vehicle driveline
First Claim
1. A method for controlling actual torque in a driveline of a land-based motor vehicle, the motor vehicle including a drivetrain having a powerplant interconnected with at least one ground engaging drive wheel via a driveline, the driveline including at least a variable ratio transmission, the method comprising the steps of:
- taking a direct, non-predictive measure of actual torque induced in the driveline of the motor vehicle and ascertaining a magnitude thereof;
ascertaining a magnitude of a torque demand being requested to be instituted in the driveline;
comparing the ascertained magnitude of the direct, non-predictive measure of actual torque taken with a driveline-configuration dependent maximum torque threshold and thereby ascertaining an over-threshold torque condition in the driveline based thereupon; and
applying at least one over-threshold torque compensating effect chosen from the group comprising (a) reconfiguring the variable ratio transmission and (b) reducing powerplant-induced driveline torque.
1 Assignment
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Accused Products
Abstract
Method and arrangement for controlling actual torque in a driveline of a land-based motor vehicle. Taking a direct, non-predictive measure of actual torque induced in the driveline of the motor vehicle and ascertaining a magnitude thereof. Ascertaining a magnitude of a torque demand being requested to be instituted in the driveline. Comparing the ascertained magnitude of the direct, non-predictive measure of actual torque taken is compared with a driveline-configuration dependent maximum torque threshold; in this way, an over-threshold torque condition is ascertained in the driveline based thereupon if such a condition exists. In multi-geared transmissions, the variability can be accounted for through the engagement of different ratio gears. In the event that such an over-threshold torque condition is detected, at least one of several possible over-threshold torque compensating effects will be applied to reduce or diminish the excessive portion of the torque. The remedial measure may be chosen from several possibilities including reconfiguring the variable ratio transmission and/or reducing powerplant-induced driveline torque.
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Citations
33 Claims
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1. A method for controlling actual torque in a driveline of a land-based motor vehicle, the motor vehicle including a drivetrain having a powerplant interconnected with at least one ground engaging drive wheel via a driveline, the driveline including at least a variable ratio transmission, the method comprising the steps of:
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taking a direct, non-predictive measure of actual torque induced in the driveline of the motor vehicle and ascertaining a magnitude thereof; ascertaining a magnitude of a torque demand being requested to be instituted in the driveline; comparing the ascertained magnitude of the direct, non-predictive measure of actual torque taken with a driveline-configuration dependent maximum torque threshold and thereby ascertaining an over-threshold torque condition in the driveline based thereupon; and applying at least one over-threshold torque compensating effect chosen from the group comprising (a) reconfiguring the variable ratio transmission and (b) reducing powerplant-induced driveline torque. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification