Torque-based powertrain control for vehicles
First Claim
1. A method for controlling a vehicle powertrain having an internal combustion engine, the method comprising:
- determining a desired engine torque and a current engine torque;
determining a difference between the desired engine torque and the current engine torque;
adjusting the difference using a stored torque offset corresponding to a current engine speed; and
controlling the engine to produce a torque corresponding to the adjusted torque difference.
2 Assignments
0 Petitions
Accused Products
Abstract
A system and method for controlling a vehicle powertrain having an internal combustion engine include determining a difference between a desired engine torque and a current engine torque, adjusting the difference based on a stored torque offset corresponding to a current engine speed, and controlling the engine to produce a torque corresponding to the adjusted torque difference. The stored torque offset is adjusted when the engine is operating in a predetermined engine speed range based on a steady-state difference between the desired and current engine torque to reduce the steady-state difference to zero. The adjusted torque difference may be limited by a maximum-engine-torque-available parameter and a minimum-engine-torque-available parameter, which is based on an operating temperature, such as the engine coolant temperature. The system and method may also include controlling spark to rapidly reduce current engine torque to the adjusted torque difference value.
93 Citations
20 Claims
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1. A method for controlling a vehicle powertrain having an internal combustion engine, the method comprising:
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determining a desired engine torque and a current engine torque; determining a difference between the desired engine torque and the current engine torque; adjusting the difference using a stored torque offset corresponding to a current engine speed; and controlling the engine to produce a torque corresponding to the adjusted torque difference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for controlling a vehicle powertrain, the system comprising:
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an internal combustion engine; at least one electrical machine coupled to the internal combustion engine by a gearset; a controller in communication with the internal combustion engine and the at least one electrical machine, the controller determining a desired engine torque for the internal combustion engine and a current engine torque being produced by the internal combustion engine, the current engine torque being determined based on electrical current associated with the at least one electrical machine, determining a difference between the desired engine torque and the current engine torque, adjusting the difference using a stored torque offset corresponding to a current engine speed, and controlling the engine to produce a torque corresponding to the adjusted torque difference. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A computer readable storage medium having stored data representing instructions executable by a computer to control a vehicle powertrain having an internal combustion engine, the computer readable storage medium comprising:
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instructions for determining a desired engine torque and a current engine torque; instructions for determining a difference between the desired engine torque and the current engine torque; instructions for adjusting the difference using a stored torque offset corresponding to a current engine speed range when the desired engine torque is within a predetermined range of a minimum engine torque; and instructions for controlling the engine to produce a torque corresponding to the adjusted torque difference. - View Dependent Claims (18, 19, 20)
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Specification