Jerk management using multivariable active driveline damping
First Claim
1. Method to control motive torque to a driveline of a system, the system comprising a plurality of torque-generative devices operably connected to a transmission operable to transmit motive torque to an axle of the driveline, comprising:
- determining a desired axle torque;
determining an output speed of the transmission and an output speed of a driven wheel of the driveline; and
,controlling one of the torque-generative devices based upon a time-rate change in the desired axle torque.
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Accused Products
Abstract
A multivariable feedback control approach to actively dampen magnitude of jerks in a powertrain system using multiple torque-control devices is offered. To manage jerks, a desired axle torque is restricted when a torque reversal occurs. When the vehicle operator or the system executes a command that requires change in direction of torque, the desired axle torque is limited to a low level until the lash estimate has changed accordingly. During this transition time, active damping controls driveline component speeds so that the effect of lash take-up is minimized. After lash take-up occurs, the desired axle torque proceeds without restriction. The invention includes determining a desired axle torque, an output speed of the transmission, and an output speed of a driven wheel of the driveline. One of the devices is controlled based upon a time-rate change in the desired axle torque.
73 Citations
18 Claims
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1. Method to control motive torque to a driveline of a system, the system comprising a plurality of torque-generative devices operably connected to a transmission operable to transmit motive torque to an axle of the driveline, comprising:
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determining a desired axle torque; determining an output speed of the transmission and an output speed of a driven wheel of the driveline; and
,controlling one of the torque-generative devices based upon a time-rate change in the desired axle torque. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. Article of manufacture for effecting a method to control driveline torque in a powertrain system having a plurality of torque-generative devices operable to transmit motive torque to the driveline, comprising:
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a storage medium having a computer program encoded therein, said computer program comprising; code to determine output speeds of a powertrain and a driven wheel of the driveline; code to determine a desired axle torque; and
,code to control each of the torque-generative devices based upon a time-rate change in the desired axle torque. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification