C.r.f. Societa Consortile Per Azioni

Schaeffler Technologies Ag & Co .kg

Emanuel Corigliano

Attilio Porta

Giancarlo Osella

Dario Del Pin

Pandeli Borodani

Dario Morina

Simone Martina

Massimo Lupo

Gian Luigi Pregnolato

Marco Montu'

Marco Montu′

Timo Kersting

Johannes Gimpl

Marco Montú

A method of controlling a pickup manoeuvre of a hybrid vehicle is actuated with an engine off, an electric motor active and a first clutch being open. In a first phase of the manoeuvre, vehicle advancement is obtained by progressively closing the second clutch so that the input shaft is set in rotation with an increasing speed, while the motor rotates at an increasing speed higher than a speed of the input shaft with the second clutch in a slip condition. Upon a request for starting the engine, the first clutch is progressively closed so that the engine starts to be driven by the motor, while the second clutch is kept in the slip condition, which is maintained until the engine and motor rotate substantially at a same speed, higher than the speed of the input shaft, and once this condition is reached, closing of the second clutch is started.

Method of controlling a pickup manoeuvre of a hybrid vehicle

A method of controlling a vehicle hybrid propulsion system is provided. The propulsion system includes an internal combustion engine, first and second clutches, an electric motor, and a gearbox having an input shaft and an output shaft connected to drive wheels. The method includes a first operating mode of starting the engine by the motor, a second operating mode of actuating a gear shift, and a third operating mode which actuates starting of the engine and the gear shift. The method includes passing from the first to the third operating modes even if starting of the engine has not been completed, or passing from the second to the third operating modes even if actuation of the gear shift has not been completed, so that the transition from one operating mode to another can be freely actuated at any time, depending upon operating conditions of the hybrid propulsion system.

Method of controlling a hybrid propulsion system of a vehicle

Method of controlling a friction clutch in a motor-vehicle transmission

According to the method the crossover phase of the friction clutches is performed by defining a linear torque profile for the first friction clutch having a given initial value and a zero final value, a linear torque profile for the second friction clutch having a zero initial value and a given final value, and a linear torque profile for the engine having a given initial value and a given final value. The final value of the torque profile of the second friction clutch is calculated, the initial value of the engine torque being known, by determining a final value of the longitudinal acceleration of the vehicle equal to a given percentage of the initial value of the longitudinal acceleration of the vehicle. The final value of the engine torque profile is calculated, the final value of the torque profile of the second friction clutch being known, on the basis of the final value determined for the longitudinal acceleration of the vehicle. The initial value of the torque profile of the first friction clutch is chosen so as to be greater than a minimum value calculated by determining the condition of synchronism of the driving shaft and of the first primary shaft.

Method for controlling the upshift operation in a motor vehicle equipped with a double clutch transmission

The method monitors a gear-change operation in a motor vehicle provided with an engine whose crankshaft is connected to a transmission having a gearbox) comprising first and second primary shafts connectable to the crankshaft of the engine by respective friction clutches controlled by corresponding actuators, and a secondary or output shaft connectable to the primary shafts by gears defining a plurality of velocity ratios or gears. The method comprises the operation of verifying and validating the detection of the disengagement of the previously engaged gear by detecting the angular velocity of the primary shaft corresponding to the gear to be disengaged, and comparing the detected value of said angular velocity with at least one reference angular velocity.

Method for monitoring a gear-change operation in a motor vehicle provided with a dual-clutch transmission

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

A process that estimates the torque transmitted by a friction clutch coupled to the shaft of a motor vehicle engine. The process includes determining the angular speed of the engine shaft and the torque developed by this shaft; calculating the difference between the measured value of the engine shaft's angular speed and an estimated value of the angular speed; and determining an estimated value of the torque transmitted by the clutch, corresponding to the calculated value of the difference or error in the engine shaft angular speed. The estimated value of the torque is used, along with the value measured or otherwise determined of the torque developed by the engine shaft, to obtain the estimated value of the angular speed of the engine shaft on the basis of a predetermined mathematical model.

Procedure for estimating the torque transmitted by a friction clutch controlled by an actuator

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

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Orbassano, Italy

Emanuel Corigliano