C.r.f. Societa Consortile Per Azioni

C.r.f. S.c.p.a.

C.r.f. Società{grave Over ( )} Consortile Per Azioni

Pandeli Borodani

Attilio Porta

Renato Gianoglio

Massimo Lupo

Massimo Fossanetti

Giovanni Ellena

Emanuel Corigliano

Claudia Supparo, Legal Representative

Giancarlo Osella

Dario Del Pin

Fulvio Giuliano

Control system for a motor vehicle provided with a semiautomatic gearbox with discrete ratios

What is described is a control system for controlling the driving-away maneuver 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, wherein 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&#x2014;on the basis of a mathematical reference model&#x2014;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&#x2014;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&#x2014;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.

Control system and method for controlling the driving-away manoeuvre in a motor vehicle with a servo-controlled gearbox

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&#x2014;on the basis of a mathematical reference model&#x2014;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.

System and method for controlling the coupling between the driveshaft and the primary gear shaft in a motor vehicle with a servo-controlled gearbox

A method of estimating the slope of a road surface on which is positioned a motor vehicle. The slope is determined by measuring the velocity and longitudinal acceleration of the vehicle by means of a mathematical model based on the relation A={dot over (&#x3bd;)}+g sin &#x3b1;, where Ais longitudinal acceleration, {dot over (&#x3bd;)} indicates the component of longitudinal acceleration of the vehicle along the road surface, g is the gravitational acceleration, and &#x3b1; represents the angle of inclination of the road surface.

Method and system for recognizing the sign of the velocity of a vehicle and for estimating the road slope

A system for controlling a servo-controlled gearbox (C), configured so as to use gear-shifting strategies similar to those used by a human driver so as to improve the driving sensation experienced by the driver. The control system uses a plurality of sensors (SENS) disposed in the vehicle for detecting the various operative conditions and a system of rules (a rule-based system) for implementing the strategies provided for.

System and a method for controlling a servo-controlled motor-vehicle gearbox

The system includes a memory in which curves are stored which define the conditions for each gear change, corresponding to at least two reference styles of driving, sensors for operating parameters of the motor vehicle, and second processing devices set up to estimate the value of a first index which identifies the kind of driving of the motor vehicle and, respectively, the value of a second index which defines the manner or style of driving of the driver, and a processing and control unit. This unit is set up to perform a learning procedure in which it acquires and memorizes the value of the second index corresponding to the manner or style of driving of the driver during a test drive with manual control of the gears, and generates and memorizes maps of modified curves defining the conditions for the gear changes according to a personalized style of driving from among the said reference methods, and an automatic control procedure in which it controls actuators in order automatically to effect the gear changes based on the modified curves generated during the learning procedure.

System for the personalized automatic control of gear changes in a motor vehicle provided with servo-assisted gears

Growing community of inventors

Orbassano, Italy

Pandeli Borodani