Control system and method for controlling the driving-away manoeuvre in a motor vehicle with a servo-controlled gearbox
First Claim
1. Control system for controlling the driving-away manoeuvre in a motor vehicle provided with a gearbox comprising a primary input shaft adapted to be coupled to a drive shaft of a propulsion system of the vehicle by means of 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, for the control of the driving-away manoeuvre in the motor vehicle; and
memory means, associated with the said processing means, in which are stored data and/or instructions representing a mathematical reference model for the calculation of the aforesaid command signals, the processing means including;
a reference torque generator module 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, reference torque request signals or data indicating the reference torque requested from the drive shaft and the reference torque requested from the friction clutch in the course of the driving-away manoeuvre;
an estimator module, arranged for calculating, on the basis of the reference torque request signals or data and on the basis of the reference model, signals or data indicating the angular velocities of the drive shaft and of the primary gear shaft in the course of the driving-away manoeuvre; and
a controller module, arranged for calculating, on the basis of the signals or data indicating the angular velocities of the drive shaft and of the primary gear shaft calculated by the estimator module, and on the basis of detected signals or data indicating the actual angular velocities of the drive shaft and of the primary gear shaft, corrective contributions to the said reference torque request signals or data, whereby the said torque request signals or data, as modified by the corresponding corrective contributions, form the command signals or data for the torque actuator devices.
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Accused Products
Abstract
What is described is a control system for controlling the driving-away manoeuvre in a motor vehicle provided with a gearbox comprising a primary input shaft which can be coupled to a drive shaft of a propulsion system of the vehicle 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, and generates—on the basis of a mathematical reference model—reference torque request signals indicating the reference torques requested from the drive shaft and from the friction clutch during the driving-away manoeuvre, and also generates—by comparison between signals indicating the estimated angular velocities of the drive shaft and of the primary gear shaft, and detected signals indicating the actual angular velocities of the drive shaft and of the primary gear shaft—corresponding corrective contributions, in such a way as to construct command signals for controlling torque actuator devices of the propulsion system and of the friction clutch, for controlling the driving-away manoeuvre in the motor vehicle.
13 Citations
20 Claims
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1. Control system for controlling the driving-away manoeuvre in a motor vehicle provided with a gearbox comprising a primary input shaft adapted to be coupled to a drive shaft of a propulsion system of the vehicle by means of 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, for the control of the driving-away manoeuvre in the motor vehicle; and
memory means, associated with the said processing means, in which are stored data and/or instructions representing a mathematical reference model for the calculation of the aforesaid command signals, the processing means including;
a reference torque generator module 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, reference torque request signals or data indicating the reference torque requested from the drive shaft and the reference torque requested from the friction clutch in the course of the driving-away manoeuvre;
an estimator module, arranged for calculating, on the basis of the reference torque request signals or data and on the basis of the reference model, signals or data indicating the angular velocities of the drive shaft and of the primary gear shaft in the course of the driving-away manoeuvre; and
a controller module, arranged for calculating, on the basis of the signals or data indicating the angular velocities of the drive shaft and of the primary gear shaft calculated by the estimator module, and on the basis of detected signals or data indicating the actual angular velocities of the drive shaft and of the primary gear shaft, corrective contributions to the said reference torque request signals or data, whereby the said torque request signals or data, as modified by the corresponding corrective contributions, form the command signals or data for the torque actuator devices. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. Control method for controlling the driving-away manoeuvre in a motor vehicle provided with a gearbox comprising a primary input shaft which can be coupled to a drive shaft of a propulsion system of the vehicle by means of a servo-assisted friction clutch,
comprising the following operations: -
a) generating, on the basis of signals or data indicating a command imparted by the driver by the operation of the accelerator pedal and on the basis of a mathematical reference model, reference torque request signals or data indicating the reference torque requested from the drive shaft and the reference torque requested from the friction clutch in the course of the driving-away manoeuvre;
b) estimating, on the basis of the reference torque request signals or data and on the basis of the reference model, signals or data indicating the angular velocities of the drive shaft and of the primary gear shaft in the course of the driving-away manoeuvre; and
c) determining, on the basis of the signals or data indicating the estimated angular velocities of the drive shaft and of the primary gear shaft, and on the basis of detected signals or data indicating the actual angular velocities of the drive shaft and of the primary gear shaft, corrective contributions to the said reference torque request signals or data, the said torque request signals or data, as modified by the corresponding corrective contributions, forming command signals or data intended for the control of torque actuator devices of the propulsion system and of the friction clutch, for the control of the driving-away manoeuvre in the motor vehicle. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification