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US 8,571,771 B2Granted
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.
Claims20
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, the control module including a processor and circuitry configured to receive a first value representative of a transmission turbine speed, determine a second value representative of a desired transmission turbine acceleration based on the first value, compute at least one torque limit as a function of the second value, and output the torque limit for use by another control module to manage acceleration of the vehicle.
1 more element
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, the control module including a processor and circuitry configured to receive one or more values representative of a desired transmission turbine acceleration limit, a vehicle gear ratio, and a vehicle mass;
- compute a torque limit based on the one or more values;
- and output the torque limit for use by another control module to manage acceleration of the vehicle.
3 more elements
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 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 request to move the vehicle forward has been received and whether a low torque condition is present, calculate at least one transmission input torque limit based on the selected vehicle acceleration control mode, and output the at least one transmission input torque limit for use by another control module to manage acceleration of the vehicle.
1 more element
Dependencies are inferred from the claim text.