摘要:
A control device for controlling a clutch of a vehicle wherein an actuator is connected to and provides for operating the clutch, the work position of which is determined by a position sensor which supplies a measured position signal to a control device receiving an information signal and supplying a control signal for the actuator; the control device has a monitor circuit for determining malfunctioning of the position sensor and supplying a fault signal; and a virtual sensor device for estimating the work position of the clutch to supply the control device, in the presence of the fault signal, with a virtual position signal instead of the measured position signal.
摘要:
A method for controlling a power assisted propulsion system in a motor vehicle so as to perform a transition from a lower gear to a higher gear without interrupting a driving torque applied to driving wheels; the propulsion system displays an internal combustion engine provided with a drive shaft and a power assisted transmission comprising in turn: a power assisted mechanical gearbox provided with a primary shaft connectable to the drive shaft and a secondary shaft connected to a transmission shaft which transmits motion to the driving wheels; a power assisted clutch interposed between the drive shaft and the primary shaft of the gearbox to connect and disconnect the drive shaft to the primary shaft of the gearbox; a power assisted brake; and an epicycloidal gear having three rotating elements: a first rotating element connected to the drive shaft, a second rotating element connected to the secondary shaft of the gearbox, and a third rotating element connected to the brake.
摘要:
A method for controlling a power assisted propulsion system in a motor vehicle so as to perform a transition from a lower gear to a higher gear without interrupting a driving torque applied to driving wheels; the propulsion system displays an internal combustion engine provided with a drive shaft and a power assisted transmission including: a power assisted mechanical gearbox provided with a primary shaft connectable to the drive shaft and a secondary shaft coupled to a transmission shaft which transmits motion to the driving wheels; a power assisted clutch interposed between the drive shaft and the primary shaft of the gearbox to couple and decouple the drive shaft to the primary shaft of the gearbox; a power assisted brake; and an epicycloidal gear having three rotating elements: a first rotating element coupled to the drive shaft, a second rotating element coupled to the secondary shaft of the gearbox, and a third rotating element coupled to the brake.
摘要:
A method and system for controlling a vehicle, according to which it is determined whether the vehicle is on a slope; it is detected whether the internal-combustion engine is turned on; it is detected whether the vehicle is stationary; a parking brake is activated automatically and independently of the action of the driver, by driving a respective servo control if the vehicle is on a slope, if the internal-combustion engine is turned on and if the vehicle is stationary; and the parking brake is disengaged automatically and independently of the action of the driver, by driving the corresponding servo control when the clutch is disengaged by a corresponding servo control for transmitting the torque generated by an internal-combustion engine of the vehicle to the driving wheels.
摘要:
Device for controlling a clutch, which is connected to an actuator, which can activate the clutch itself; the control device comprises a position sensor, which can detect the position of the clutch, in order to supply a measuring position signal to a main control device, which receives as input information signals, and generates as output a control signal to control the actuator, a monitoring circuit, which can detect a state of malfunctioning of the position sensor, in order to supply a malfunctioning signal, and an auxiliary control device, which can be activated in the presence of a malfunctioning signal, in order to transfer control of the actuator from the main control device to the auxiliary control device.
摘要:
Control device for a transmission unit comprising a clutch and a gear shift which are coupled respectively to a first and a second actuator unit in order to operate the actuation of the clutch and the selection and engagement/disengagement of the gears. The device comprises a transmission control circuit in which a main microprocessor formulates control signals for the first and second actuator unit and an auxiliary microprocessor determines a state of malfunctioning of the main microprocessor in order to transfer the control of the transmission unit to the auxiliary microprocessor in the event of a fault.
摘要:
A method for controlling a vehicle presenting the steps of: verifying, at starting of an internal-combustion engine, whether a memory of calibrations contains the function of transmissibility of a clutch and/or the effective positions of engagement and selection of the gears in a gearchange; sending to the driver, if the memory of calibrations does not contain the function of transmissibility of the clutch and/or the effective positions of engagement and selection of the gears in the gearchange, a signal of start of a first self-calibration step, during which the driver must leave the internal-combustion engine turned on and the vehicle stationary; selecting and engaging a number of times, during the first self-calibration step, all the gears of the gearchange autonomously from the driver for determining the effective positions of engagement and selection of the gears in the gearchange; disengaging and engaging, during the first self-calibration step, the clutch with the gearchange in neutral and autonomously from the driver for determining a point of start of engagement of the clutch; and sending to the driver, at the end of the first self-calibration step, a signal of end of the first self-calibration step.
摘要:
A method and system for controlling a vehicle, according to which it is determined whether the vehicle is on a slope; it is detected whether the internal-combustion engine is turned on; it is detected whether the vehicle is stationary; a parking brake is activated automatically and independently of the action of the driver, by driving a respective servo control if the vehicle is on a slope, if the internal-combustion engine is turned on and if the vehicle is stationary; and the parking brake is disengaged automatically and independently of the action of the driver, by driving the corresponding servo control when the clutch is disengaged by a corresponding servo control for transmitting the torque generated by an internal-combustion engine of the vehicle to the driving wheels.
摘要:
An automatic manual transmission having: at least one primary shaft; at least one secondary shaft; a plurality of gear pairs, each of which mechanically couples the primary shaft to the secondary shaft; a plurality of synchronizers, each of which is mounted coaxial to a shaft, is coupled to a gear of at least one gear pair, and is adapted to be actuated to engage the gear to the shaft; a plurality of forks, which actuate the synchronizers and are movable; a parking lock device which may be actuated to prevent the rotation of the secondary shaft; and a connecting device, which is mechanically connected on one side to a first fork and on the other side to the parking lock device to transmit the movement of the first fork to the parking lock device so as to control the activation and deactivation of the parking lock device itself by exploiting the movement of the first fork.
摘要:
A method for the performance of the gear disengagement in a servo-controlled manual gear change, according to which an oscillation is generated with respect to the angular speed of a primary shaft of the gear change by abruptly opening the relative clutch and the disengagement of the gear is performed around the maximum amplitude of an oscillation half-wave, when this oscillation has caused the angular speed of the primary shaft to be relatively close to the angular speed that the primary shaft has to assume to carry out the engagement of the subsequent gear.