Powertrain control system for a vehicle utilizing vehicle acceleration
First Claim
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1. A method for controlling a powertrain of a vehicle, comprising:
- determining a first desired vehicle acceleration based on a driver command;
determining a second desired vehicle acceleration based on a speed control strategy;
selecting a maximum of said first desired vehicle acceleration and said second desired vehicle acceleration; and
controlling the powertrain so that an actual vehicle acceleration approaches said selected vehicle acceleration.
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Abstract
A method for monitoring an electronically controlled drive unit of a vehicle uses actual vehicle acceleration and a preselected vehicle acceleration. Actual acceleration is determined from any of an acceleration sensor or vehicle speed sensors. When actual acceleration is greater than the preselected acceleration, a reaction is initiated to reduce vehicle acceleration. A method for controlling vehicle acceleration is also disclosed where desired acceleration is determine from either the operator command or a cruise control system.
89 Citations
22 Claims
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1. A method for controlling a powertrain of a vehicle, comprising:
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determining a first desired vehicle acceleration based on a driver command;
determining a second desired vehicle acceleration based on a speed control strategy;
selecting a maximum of said first desired vehicle acceleration and said second desired vehicle acceleration; and
controlling the powertrain so that an actual vehicle acceleration approaches said selected vehicle acceleration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for controlling a powertrain of a vehicle, comprising:
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determining a first desired vehicle acceleration based on a driver command;
determining a second desired vehicle acceleration based on a speed control strategy;
comparing said first desired vehicle acceleration to said second desired vehicle acceleration;
selecting one of said first desired vehicle acceleration and said second desired vehicle acceleration in response to said comparison;
determining a first desired powertrain torque in response to said selected vehicle acceleration;
determining a second desired powertrain torque based on a traction control system;
selecting a minimum of said first desired powertrain torque and said second desired powertrain torque; and
controlling the powertrain in response to said selected powertrain torque. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A system for a vehicle having an electronically controlled drive unit, the system comprising:
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a first controller that determines a first desired vehicle acceleration based on a driver command, determines a second desired vehicle acceleration based on a speed control strategy, selects one of said first desired vehicle acceleration and said second desired vehicle acceleration, and adjusts a drive unit operating parameter so that an actual vehicle acceleration approaches said selected vehicle acceleration; and
a second controller that determines a preselected acceleration of the vehicle, determines an actual vehicle acceleration based on a sensor coupled to the vehicle, and initiates a reaction when said actual vehicle acceleration is greater than said preselected acceleration. - View Dependent Claims (19, 20, 21)
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22. A method for controlling a powertrain of a vehicle, comprising:
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determining a first desired vehicle acceleration based on a driver pedal position and an actual vehicle speed;
determining a second desired vehicle acceleration based on a speed control strategy;
selecting one of said first desired vehicle acceleration and said second desired vehicle acceleration; and
controlling the powertrain so that an actual vehicle acceleration approaches said selected vehicle acceleration.
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Specification