Tandem tire wear torque control
AssigneePACCAR Inc
InventorsJordan Michael Houser, Benjamin Thomas Grover, Charles Wayne Reinhardt Swart
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to systems and methods of automatically distributing powertrain demand between tandem drive axles in a tandem drive axle system for balanced tire wear between the tandem drive axles. Examples described herein analyze input signals collected from various vehicle sensors about operating conditions of the front and back tandem drive axles, and automatically bias a distribution of torque demand between the front and back tandem drive axles to correct for asymmetric wear based on known normal wear of the tires under like operating conditions.
Claims20
A method for providing balanced tire wear between tandem drive axles, comprising:
- receiving sensor input about an operating condition of a front axle and a rear axle of a tandem drive axle assembly of a vehicle;
- determining a balanced tire wear torque bias factor based on the operating condition;
- receiving an acceleration request;
- calculating a torque request corresponding to an amount of torque to propel the vehicle based on the acceleration request;
- determining a distribution of the torque request between the front axle and the rear axle, including biasing the distribution based on the balanced tire wear torque bias factor;
- and
- requesting a biased amount of torque from the front axle and a biased amount of torque from the rear axle based on the biased distribution.
A system for providing balanced tire wear between tandem drive axles, comprising:
- at least one processor;
- and
- memory coupled to the at least one processor including instructions, which when executed, cause the system to:
- receive sensor input about an operating condition of a front axle and a rear axle of a tandem drive axle assembly of a vehicle;
- determine a balanced tire wear torque bias factor based on the operating condition;
- receive an acceleration request;
- calculate a torque request corresponding to the acceleration request;
- determine a distribution of the torque request between the front axle and the rear axle, including by biasing the distribution of torque based on the balanced tire wear torque bias factor;
- and
- communicate a biased front axle torque request to the front axle and a biased rear axle torque request to the rear axle corresponding to the biased distribution of torque.
A vehicle, comprising:
- a plurality of sensors;
- a tandem drive axle assembly, comprising:
- a front axle including a first set of tires;
- a rear axle including a second set of tires;
- at least one controller including:
- at least one processor;
- and
- a memory including instructions, which when executed by the at least one processor, cause the at least one controller to:
- receive inputs from the plurality of sensors about an operating condition of the front axle and the rear axle;
- determine a balanced tire wear torque bias factor based on the operating condition;
- receive an acceleration request;
- calculate a torque request corresponding to the acceleration request;
- determine a distribution of the torque request between the front axle and the rear axle, including by biasing the distribution of torque based on the balanced tire wear torque bias factor;
- and
- communicate a biased front axle torque request to the front axle and a biased rear axle torque request to the rear axle corresponding to the biased distribution of torque.
Dependencies are inferred from the claim text.