System and method for improving driveability and performance of a hybrid vehicle
First Claim
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1. A system for propelling a vehicle, comprising:
- a primary power source for propelling the vehicle at a time after the vehicle is initially propelled;
a secondary power source for initially propelling and accelerating the vehicle prior to activation of the primary power source; and
a controller for determining a weight of the vehicle based on initial acceleration of the vehicle, for determining a driver torque request, and for activating the primary power source when the weight of the vehicle exceeds a predetermined threshold vehicle weight value and the driver torque request exceeds a predetermined threshold torque value.
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Abstract
A control method and system for propelling a vehicle includes a primary power source for propelling the vehicle at a time after the vehicle is initially propelled, and a secondary power source for initially propelling and accelerating the vehicle prior to activation of the primary power source. A controller determines a weight of the vehicle based on the initial acceleration of the vehicle, and a driver torque request. The controller activates the primary power source when the weight of the vehicle exceeds a predetermined threshold vehicle weight value and the driver torque request exceeds a predetermined threshold torque value.
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Citations
25 Claims
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1. A system for propelling a vehicle, comprising:
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a primary power source for propelling the vehicle at a time after the vehicle is initially propelled;
a secondary power source for initially propelling and accelerating the vehicle prior to activation of the primary power source; and
a controller for determining a weight of the vehicle based on initial acceleration of the vehicle, for determining a driver torque request, and for activating the primary power source when the weight of the vehicle exceeds a predetermined threshold vehicle weight value and the driver torque request exceeds a predetermined threshold torque value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of operating a vehicle having a plurality of power sources for propelling the vehicle, the method comprising:
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using one of the power sources to initially accelerate the vehicle;
determining a weight of the vehicle based on initial acceleration of the vehicle;
determining a driver torque request; and
activating another of the power sources when the weight of the vehicle exceeds a predetermined threshold vehicle weight value and the driver torque request exceeds a predetermined threshold torque value. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method for minimizing user-discernible ride inconsistency attributable to starting of an internal combustion engine of a vehicle having at least an internal combustion engine and an electrically powered motor, the method comprising:
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determining a weight of the vehicle;
comparing the weight of the vehicle with a predetermined threshold vehicle weight value;
generating a driver torque request;
comparing the driver torque request with a predetermined threshold torque value; and
starting the engine when the weight of the vehicle is greater than the predetermined threshold vehicle weight value and the driver torque request is greater than the predetermined threshold torque value, the starting of the engine being controlled to occur when the motor has sufficient torque capacity to be controlled in a manner that negates opposing torque effects imposed by the starting of the engine. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification