System and method for controlling the coupling between the driveshaft and the primary gear shaft in a motor vehicle with a servo-controlled gearbox
First Claim
1. System for controlling the coupling between a driveshaft of a propulsion system of a motor vehicle and a primary input shaft of a gearbox through a servo-assisted friction clutch, comprising electronic processing means adapted to receive at their inputs signals or data indicating a command imparted by the driver of the motor vehicle by the operation of the accelerator pedal, and arranged for generating command signals or data designed to control torque actuator devices of the propulsion system and of the friction clutch on the basis of a mathematical reference model,wherein the processing means are arranged for generating, on the basis of the signals or data indicating the command imparted by the driver by the operation of the accelerator pedal and of the reference model, in a driving-away or gear-changing manoeuvre, reference torque request signals or data indicating the reference torque requested from the driveshaft and the reference torque requested from the friction clutch, the said request signals or data varying in time in such a way as to cause synchronization between the angular velocities of the driveshaft and of the primary gear shaft to be reached at the same moment as the difference between the angular accelerations of the said shafts becomes zero.
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Accused Products
Abstract
What is described is a control system for controlling the coupling between a driveshaft of a motor vehicle propulsion system and a primary input shaft of a gearbox by means of a servo-assisted friction clutch.
A control unit receives at its input signals indicating a command imparted by the driver of the motor vehicle by operating the accelerator pedal in a driving-away or gear-changing manoeuvre, and generates—on the basis of a mathematical reference model—reference torque request signals indicating the reference torques requested from the driveshaft and from the friction clutch, the said request signals or data varying in time in such a way as to cause synchronization between the angular velocities of the driveshaft and of the primary gear shaft to be reached at the same moment as the difference between the angular accelerations of the said shafts becomes zero.
11 Citations
16 Claims
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1. System for controlling the coupling between a driveshaft of a propulsion system of a motor vehicle and a primary input shaft of a gearbox through a servo-assisted friction clutch, comprising electronic processing means adapted to receive at their inputs signals or data indicating a command imparted by the driver of the motor vehicle by the operation of the accelerator pedal, and arranged for generating command signals or data designed to control torque actuator devices of the propulsion system and of the friction clutch on the basis of a mathematical reference model,
wherein the processing means are arranged for generating, on the basis of the signals or data indicating the command imparted by the driver by the operation of the accelerator pedal and of the reference model, in a driving-away or gear-changing manoeuvre, reference torque request signals or data indicating the reference torque requested from the driveshaft and the reference torque requested from the friction clutch, the said request signals or data varying in time in such a way as to cause synchronization between the angular velocities of the driveshaft and of the primary gear shaft to be reached at the same moment as the difference between the angular accelerations of the said shafts becomes zero.
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10. Method for controlling the coupling between a driveshaft of a propulsion system of a motor vehicle and a primary input shaft of a gearbox through a servo-assisted friction clutch, comprising the following operations:
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acquisition of signals or data indicating a command imparted by the driver of the motor vehicle by the operation of the accelerator pedal; and generation of command signals or data intended to control torque actuator devices of the propulsion system and of the friction clutch on the basis of a mathematical reference model, generation, on the basis of the signals or data indicating the command imparted by the driver by the operation of the accelerator pedal and of the mathematical reference model, in a driving-away or gear-changing manoeuvre, of reference torque request signals or data indicating the reference torque requested from the driveshaft and the reference torque requested from the friction clutch, the said request signals or data varying in time in such a way as to cause synchronization between the angular velocities of the driveshaft and of the primary gear shaft to be reached at the same moment as the difference between the angular accelerations of the said shafts becomes zero. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification