Transmission turbine acceleration control for managing vehicle acceleration
AssigneeAllison Transmission, Inc.
InventorJohn P Kresse
Life of this patent
Estimating the term…
Abstract
Methods and systems for managing acceleration of a motor vehicle having an automatic transmission by controlling transmission turbine acceleration are provided. A desired transmission turbine acceleration is determined based on vehicle speed, turbine speed, and other information obtained from the vehicle transmission. One or more torque limits are determined as a function of the turbine acceleration. The torque limits are applied to manage acceleration of the vehicle.
Claims21
A control module for a motor vehicle, the control module including a processor and circuitry configured to:
- receive a turbine speed from an automatic transmission of a motor vehicle,
- receive a vehicle speed from the vehicle,
- determine a desired transmission turbine acceleration limit based on the transmission turbine speed and the vehicle speed,
- generate a transmission input torque limit based on the desired transmission turbine acceleration limit and
- output the transmission input torque limit to manage acceleration of the vehicle so that the acceleration of the vehicle does not exceed a maximum desired acceleration.
A control module for a motor vehicle, the control module including a processor and circuitry configured to:
- receive a turbine speed from an automatic transmission of a motor vehicle,
- receive a vehicle speed from the vehicle,
- determine a desired transmission turbine acceleration limit based on the transmission turbine speed and the vehicle speed,
- generate a transmission input torque limit based on the desired transmission turbine acceleration limit and
- output the transmission input torque limit to manage acceleration of the vehicle,
- wherein determining a desired transmission turbine acceleration limit includes determining a desired vehicle acceleration based on the vehicle speed, and determining a desired vehicle acceleration includes selecting a vehicle speed-vehicle acceleration relationship table from a plurality of predetermined vehicle speed-vehicle acceleration relationship tables.
A transmission for a motor vehicle comprising:
- a torque conversion apparatus couplable to a vehicle mover,
- a gear arrangement operably coupled to the torque conversion apparatus,
- a gear control assembly operably coupled to the gear arrangement, and
- a control module operable to control operation of the transmission by receiving a turbine speed from an automatic transmission of a motor vehicle, receiving a vehicle speed from the vehicle, determining a desired transmission turbine acceleration limit based on the transmission turbine speed and the vehicle speed, generating a transmission input torque limit based on the desired transmission turbine acceleration limit, and outputting the transmission input torque limit to manage acceleration of the vehicle, wherein the vehicle mover includes an engine and a motor, and the control module is adapted to compute a first torque limit, output the first torque limit for use by the engine, compute a second torque limit, and output the second torque limit for use by the motor.
A computer program product embodied in a tangible medium, for controlling transmission turbine acceleration to manage acceleration of a motor vehicle, including instructions executable by a controller to:
- receive data representative of a transmission turbine speed and a current vehicle speed,
- select a vehicle acceleration mode by determining at least one of whether a vehicle operator is requesting the vehicle to move forward and whether a low torque condition is present, and
- calculating at least one transmission input torque limit based on the selected vehicle acceleration control mode.
A method implemented in computer circuitry for managing acceleration of a motor vehicle having an automatic transmission, the method comprising:
- receiving a plurality of data signals from an automatic transmission of a vehicle,
- determining a current vehicle speed,
- determining a desired turbine acceleration based only on the vehicle speed and the data signals received from the automatic transmission, and
- converting the desired turbine acceleration to at least one torque limit to be applied by the vehicle to manage acceleration of the vehicle.
Dependencies are inferred from the claim text.