Patents by Inventor Attilio Porta

Attilio Porta has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8752444
    Abstract: An electro-hydraulic control apparatus for a motor-vehicle transmission having at least five forward gears and one reverse gear, including first, second and third shift forks, each movable in at least one engagement position to engage a respective gear, first, second and third hydraulic actuators each arranged to control the movement of a respective shift fork in the respective at least one engagement position, and a slide valve selectively movable into one of at least three operating positions in each of which the slide valve selects a respective hydraulic actuator, wherein a first operating position is an end-of-travel position and corresponds to the selection of the first hydraulic actuator, and wherein a second operating position is also an end-of-travel position and corresponds to the selection of the second hydraulic actuator.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: June 17, 2014
    Assignee: C.R.F. Societa Consortile Per Azioni
    Inventors: Marco Garabello, Giancarlo Osella, Attilio Porta, Gianluigi Pregnolato, Sara Sottano
  • Publication number: 20130312561
    Abstract: An electro-hydraulic control apparatus for a motor-vehicle transmission having at least five forward gears and one reverse gear, including first, second and third shift forks, each movable in at least one engagement position to engage a respective gear, first, second and third hydraulic actuators each arranged to control the movement of a respective shift fork in the respective at least one engagement position, and a slide valve selectively movable into one of at least three operating positions in each of which the slide valve selects a respective hydraulic actuator, wherein a first operating position is an end-of-travel position and corresponds to the selection of the first hydraulic actuator, and wherein a second operating position is also an end-of-travel position and corresponds to the selection of the second hydraulic actuator.
    Type: Application
    Filed: December 10, 2012
    Publication date: November 28, 2013
    Applicant: C.R.F. SOCIETA CONSORTILE PER AZIONI
    Inventors: Marco GARABELLO, Giancarlo OSELLA, Attilio PORTA, Gianluigi PREGNOLATO, Sara SOTTANO
  • Patent number: 8571767
    Abstract: The method comprises the steps of: storing a curve or characteristic of torque transmitted by the friction clutch as a function of the position of the clutch, calculating a desired value of the torque to be transmitted by means of the clutch, and modifying the position of the clutch so as to bring it to the position to which the desired transmitted torque value corresponds according to the stored curve or characteristic, upon the occurrence of predetermined operative conditions, estimating the value of the torque transmitted by the clutch, by means of an algorithm, as a function of the detected instantaneous values of the torque delivered and of the angular velocity of the shaft of the engine, and detecting the corresponding instantaneous position or estimate position of the clutch, and then modifying the previously stored curve or characteristic in accordance with predetermined procedures in dependence on the difference between the estimated value of the torque transmitted and that value of the torque tra
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: October 29, 2013
    Assignee: CRF Societa Consortile per Azioni
    Inventors: Attilio Porta, Emanuel Corigliano, Giancarlo Osella, Dario Del Pin, Marco Montu', Massimo Lupo
  • Patent number: 8447478
    Abstract: The control apparatus comprises, in its version intended for a double-clutch transmission, first, second and third shift forks each movable between first and second engagement positions to engage a respective gear, of which the first shift fork is able to engage at least the first gear and the second shift fork is able to engage at least the second gear, first, second and third double-acting hydraulic actuators arranged to control each the movement of a respective shift fork between the first and second engagement position, of which the first hydraulic actuator is associated to the first shift fork and the second hydraulic actuator is associated to the second shift fork, a slide valve selectively movable into one of at least three operating positions in each of which the slide valve selects a respective hydraulic actuator, and first and second gear shift solenoid valves for controlling the supply of fluid to the hydraulic actuator each time selected by the slide valve or the connection of that actuator to a t
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: May 21, 2013
    Assignee: C.R.F. Societa Consortile per Azioni
    Inventors: Marco Garabello, Giancarlo Osella, Attilio Porta, Gianluigi Pregnolato, Sara Sottano
  • Patent number: 8397598
    Abstract: The gearbox comprises an engagement sleeve movable between a neutral position and one engagement position for engagement of one given gear, and a shift fork operatively connected to the engagement sleeve for controlling the movement thereof between the neutral position and the engagement position. The shift fork is slidably mounted on a stationary support rod, which is provided with a pair of bushes defining a first axial abutment surface for stopping the movement of the shift fork in the direction from the neutral position to the engagement position and a second axial abutment surface for stopping the movement of the shift fork in the direction from the engagement position to the neutral position. The neutral position of the shift fork is axially spaced from the second axial abutment surface.
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: March 19, 2013
    Assignee: C.R.F. Societa Consortile per Azioni
    Inventors: Marco Garabello, Giancarlo Osella, Attilio Porta, Gianluigi Pregnolato, Sara Sottano
  • Patent number: 8388497
    Abstract: 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.
    Type: Grant
    Filed: September 23, 2009
    Date of Patent: March 5, 2013
    Assignee: C.R.F. Societa Consortile per Azioni
    Inventors: Emanuel Corigliano, Giancarlo Osella, Attilio Porta, Dario Del Pin
  • Patent number: 8255131
    Abstract: 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.
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: August 28, 2012
    Assignee: C.R.F. Societa Consortile per Azioni
    Inventors: Attilio Porta, Giancarlo Osella, Gian Luigi Pregnolato, Marco Montu′, Emanuel Corigliano
  • Patent number: 8160787
    Abstract: The control system comprises detectors or estimators capable of supplying electrical signals or data indicative of the values of predetermined state variables including the angular velocity of the crankshaft of the engine, the difference between this angular velocity and the angular velocity of the primary shaft of the gearbox, and the torque delivered by the engine crankshaft and the torque transmitted by the friction clutch; calculating devices capable of supplying signals indicating the errors between the values of the state variables and respective reference values; filter devices capable of incrementing, within a predetermined frequency band, the relative weight selectively of the error of angular velocity of the crankshaft of the engine, and of the error of the abovementioned difference of angular velocity; processing devices capable of generating, in accordance with predetermined transfer functions, output signals or data indicating a torque partial value or contribution to be delivered by the engin
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: April 17, 2012
    Assignee: CRF Societa Consortile per Azioni
    Inventors: Emanuel Corigliano, Attilio Porta, Giancarlo Osella, Pandeli Borodani
  • Patent number: 8095334
    Abstract: 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.
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: January 10, 2012
    Assignee: C.R.F. Societa Consortile per Azioni
    Inventors: Emanuel Corigliano, Giancarlo Osella, Attilio Porta
  • Publication number: 20100138121
    Abstract: The method comprises the steps of: storing a curve or characteristic of torque transmitted by the friction clutch as a function of the position of the clutch, calculating a desired value of the torque to be transmitted by means of the clutch, and modifying the position of the clutch so as to bring it to the position to which the desired transmitted torque value corresponds according to the stored curve or characteristic, upon the occurrence of predetermined operative conditions, estimating the value of the torque transmitted by the clutch, by means of an algorithm, as a function of the detected instantaneous values of the torque delivered and of the angular velocity of the shaft of the engine, and detecting the corresponding instantaneous position or estimate position of the clutch, and then modifying the previously stored curve or characteristic in accordance with predetermined procedures in dependence on the difference between the estimated value of the torque transmitted and that value of the torque tra
    Type: Application
    Filed: November 18, 2009
    Publication date: June 3, 2010
    Applicant: C.R.F. SOCIETA' CONSORTILE PER AZIONI
    Inventors: Attilio Porta, Emanuel Corigliano, Giancarlo Osella, Dario Del Pin, Marco Montu', Massimo Lupo
  • Publication number: 20100113219
    Abstract: 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.
    Type: Application
    Filed: September 23, 2009
    Publication date: May 6, 2010
    Applicant: C.R.F. SOCIETA' CONSORTILE PER AZIONI
    Inventors: Emanuel CORIGLIANO, Giancarlo OSELLA, Attilio PORTA, Dario DEL PIN
  • Patent number: 7702445
    Abstract: 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—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 actuato
    Type: Grant
    Filed: June 8, 2006
    Date of Patent: April 20, 2010
    Assignee: C.R.F. Società Consortile per Azioni
    Inventors: Renato Gianoglio, Claudia Supparo, legal representative, Dario Del Pin, Giovanni Ellena, Massimo Fossanetti, Massimo Lupo, Attilio Porta, Pandeli Borodani
  • Publication number: 20090299584
    Abstract: 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.
    Type: Application
    Filed: April 13, 2009
    Publication date: December 3, 2009
    Applicant: C.R.F. SOCIETA' CONSORTILE PER AZIONI
    Inventors: Attilio Porta, Giancarlo Osella, Gian Luigi Pregnolato, Marco Montu', Emanuel Corigliano
  • Publication number: 20090292510
    Abstract: The procedure estimates the torque transmitted by a friction clutch coupled to the shaft of a motor vehicle engine and controlled by means of an actuator, the procedure comprising the operations of: measuring or otherwise determining the angular speed of the engine shaft and the torque developed by this shaft; calculating the difference or error between the measured value of the engine shaft's angular speed and an estimated value of the said angular speed; and, using an electronic controller, determining an estimated value of the torque transmitted by the clutch, corresponding to the calculated value of the said difference or error in the engine shaft angular speed; the estimated value of the torque transmitted by the clutch being used, along with the value measured or otherwise determined of the torque developed by the engine shaft, to obtain the said estimated value of the angular speed of the engine shaft on the basis of a predetermined mathematical model.
    Type: Application
    Filed: April 13, 2009
    Publication date: November 26, 2009
    Applicant: C.R.F. SOCIETA' CONSORTILE PER AZIONI
    Inventors: Emanuel CORIGLIANO, Giancarlo OSELLA, Attilio PORTA
  • Publication number: 20090292428
    Abstract: The control system comprises detectors or estimators capable of supplying electrical signals or data indicative of the values of predetermined state variables including the angular velocity of the crankshaft of the engine, the difference between this angular velocity and the angular velocity of the primary shaft of the gearbox, and the torque delivered by the engine crankshaft and the torque transmitted by the friction clutch; calculating devices capable of supplying signals indicating the errors between the values of the state variables and respective reference values; filter devices capable of incrementing, within a predetermined frequency band, the relative weight selectively of the error of angular velocity of the crankshaft of the engine, and of the error of the abovementioned difference of angular velocity; processing devices capable of generating, in accordance with predetermined transfer functions, output signals or data indicating a torque partial value or contribution to be delivered by the engin
    Type: Application
    Filed: April 13, 2009
    Publication date: November 26, 2009
    Applicant: C.R.F. SOCIETA' CONSORTILE PER AZIONI
    Inventors: Emanuel Corigliano, Attilio Porta, Giancarlo Osella, Pandeli Borodani
  • Publication number: 20090151496
    Abstract: The gearbox comprises an engagement sleeve movable between a neutral position and one engagement position for engagement of one given gear, and a shift fork operatively connected to the engagement sleeve for controlling the movement thereof between the neutral position and the engagement position. The shift fork is slidably mounted on a stationary support rod, which is provided with a pair of bushes defining a first axial abutment surface for stopping the movement of the shift fork in the direction from the neutral position to the engagement position and a second axial abutment surface for stopping the movement of the shift fork in the direction from the engagement position to the neutral position. The neutral position of the shift fork is axially spaced from the second axial abutment surface.
    Type: Application
    Filed: December 1, 2008
    Publication date: June 18, 2009
    Applicant: C.R.F. SOCIETA' CONSORTILE PER AZIONI
    Inventors: Marco GARABELLO, Giancarlo OSELLA, Attilio PORTA, Gianluigi PREGNOLATO, Sara SOTTANO
  • Publication number: 20090157271
    Abstract: The control apparatus comprises, in its version intended for a double-clutch transmission, first, second and third shift forks each movable between first and second engagement positions to engage a respective gear, of which the first shift fork is able to engage at least the first gear and the second shift fork is able to engage at least the second gear, first, second and third double-acting hydraulic actuators arranged to control each the movement of a respective shift fork between the first and second engagement position, of which the first hydraulic actuator is associated to the first shift fork and the second hydraulic actuator is associated to the second shift fork, a slide valve selectively movable into one of at least three operating positions in each of which the slide valve selects a respective hydraulic actuator, and first and second gear shift solenoid valves for controlling the supply of fluid to the hydraulic actuator each time selected by the slide valve or the connection of that actuator to a t
    Type: Application
    Filed: December 1, 2008
    Publication date: June 18, 2009
    Applicant: C.R.F. SOCIETA' CONSORTILE PER AZIONI
    Inventors: Marco Garabello, Giancarlo Osella, Attilio Porta, Gianluigi Pregnolato, Sara Sottano
  • Patent number: 7373233
    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.
    Type: Grant
    Filed: June 8, 2006
    Date of Patent: May 13, 2008
    Assignee: C.R.F. Società{grave over ( )} Consortile per Azioni
    Inventors: Renato Gianoglio, Claudia Supparo, legal representative, Dario Del Pin, Giovanni Ellena, Massimo Fossanetti, Massimo Lupo, Attilio Porta, Pandeli Borodani
  • Publication number: 20060287794
    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.
    Type: Application
    Filed: June 8, 2006
    Publication date: December 21, 2006
    Inventors: Renato Gianoglio, Claudia Supparo, Dario Pin, Giovanni Ellena, Massimo Fossanetti, Massimo Lupo, Attilio Porta, Pandeli Borodani
  • Publication number: 20060287793
    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.
    Type: Application
    Filed: June 8, 2006
    Publication date: December 21, 2006
    Inventors: Renato Gianoglio, Dario Del Pin, Giovanni Ellena, Massimo Fossanetti, Massimo Lupo, Attilio Porta, Pandeli Borodani, Claudia Supparo