Method for controlling an engine for a motor vehicle
AssigneeFord Global Technologies, LLC
InventorsStephen DeLaSalle, Owen Fraser Wood, Peter Douglas Devonport, Chris John Kaven, Richard Andrew Powell
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Abstract
A method for controlling the operation of an engine of a vehicle is disclosed in which a torque request signal supplied to control the supply of torque from the engine is adaptively modified based upon a desired maximum acceleration limit for the currently engaged gear and variations in the sum of forces resisting motion of the vehicle.
Claims20
A method for controlling an engine of a motor vehicle having an engine driven transmission providing a number of gear ratios, comprising:
- controlling the engine in response to a torque request, setting an acceleration limit based upon at least a current gear ratio, estimating a current road load for the motor vehicle and setting a maximum torque request limit based upon the estimated road load and the acceleration limit.
A system for controlling operation of an engine of a motor vehicle having an engine driven transmission providing a number of gear ratios, the system comprising:
- a main processor arranged to receive information regarding the current operating state of the engine and the current operating state of the motor vehicle, including current gear ratio and;
- an engine control processor to control the operation of the engine in response to a torque request from the main processor, wherein the main processor is operable to set an acceleration limit for the motor vehicle based upon at least the current gear ratio, estimate a current road load for the motor vehicle, and set a maximum torque request limit based upon the estimated road load and the acceleration limit.
A method, comprising:
- limiting torque below that requested when above a threshold request;
- the threshold increasing with increasing road load, and a degree of limiting reduced with higher road load and increased with higher discrete transmission gear ratios.
Dependencies are inferred from the claim text.