Patent ID: 6547697
Filing Date: 2003-04-15
Classification: B60W,F16H,Y10T

Abstract:
A motor vehicle comprising:a fully automatic transmission having a transmission control unit; and an engine having an engine management unit, said engine management unit receives, from a throttle pedal, information representative of torque demand from a driver of the motor vehicle, on the basis of the information, the engine management unit controls operation of the engine, said engine management unit supplies information to the transmission control unit, management of said engine being modifiable as a function of information transmitted by the transmission control unit to the engine management unit, for certain phases of operation of the vehicle, the transmission control unit inhibits an action of the torque demand information and substitutes said torque demand information with an engine management command to which the engine management unit is subordinated, wherein when shifting from an old gear ratio to a new gear ratio which is progressively lower, the transmission control unit transmits to the engine management unit, a management command so that the engine follows a given speed variation curve.