Method And Device For Controlling A Motor Vehicle Drive Train
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Accused Products
Abstract
A method for controlling a drivetrain including an automatically shifted starting clutch and gear-shift clutch and a transmission, with a non self-locking clutch actuator, a gear actuator for engaging and disengaging transmission gears and a control unit which generates control commands for the clutch actuator and gear actuator and transmits such commands to the actuators such that, when the vehicle is at rest and a gear is engaged and if the clutch actuator fails, the clutch does not inadvertently engage. When a transmission gear is engaged, a control command is generated and sent for the clutch actuator to disengage the clutch. Thereafter, the vehicle speed is determined and if the speed is essentially zero and the clutch begins to engage, a control command is sent to the gear actuator to shift the transmission to its neutral position.
40 Citations
30 Claims
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1-15. -15. (canceled)
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16. A method for controlling a drivetrain having an automatically shifted starting and gear-shift clutch (43), an automatic transmission (46), a clutch actuator (4) which, in relation to an actuation movement, is not made self-locking, a gear actuator (8) for engaging and disengaging transmission gears, and a control unit (31) which, with information received from sensors and control programs, generates control commands for the clutch actuator (4) and the gear actuator (8) and transmits the control commands to the clutch actuator (4) and the gear actuator (8), the method comprising the steps of:
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determining a speed of the vehicle; generating a first control command if the speed of the vehicle is essentially zero and a start of undesired engagement of the gear-shift clutch (43) is detected; sending the first control command to at least one actuation mechanism (17, 18) of the gear actuator (8) to shift the transmission (46) to a neutral position; generating a second control command if a transmission gear is engaged; and sending the second control command to at least one actuation mechanism (14) of the clutch actuator (4) to disengage the automatically shifted starting and gear-shift clutch (43). - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A device for controlling a drivetrain of a vehicle having an automatically actuated starting and gear-shift clutch (43) and an automatic transmission (46), the device comprising:
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a clutch actuator (4) which, in relation to an actuation movement of clutch actuator (4), is not self-locking; a gear actuator (8) for engaging and disengaging transmission gears; a control unit (31) which, with information received from sensors and control programs, generates control commands for the clutch actuator (4) and the gear actuator (8) and transmits the control commands to the clutch actuator (4) and the gear actuator (8); a mechanism (33) for determining a speed of the vehicle; and at least one of a pressure sensor (47) in communication with the clutch actuation cylinder (4), a path sensor (25) and an active time determination device (35) for detecting a start of an undesired engagement of the clutch actuator (4) while a gear is engaged, the at least one of the pressure sensor (47) communicates with the clutch actuation cylinder (4), the path sensor (25) and the active time determination device (35) co-operate with the control unit (31) such that, if the speed of vehicle is essentially zero, the control unit (31) directs an actuation mechanism (17, 18) of the gear actuator (8) to shift the transmission (46) into neutral position. - View Dependent Claims (27, 28, 29)
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30. A method of controlling a drivetrain of a vehicle having an automatically shifted starting and gear-shift clutch (43) and an automatic transmission (46), the method comprising the steps of:
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monitoring at least one of a driving speed of the vehicle, actuation of a clutch actuator (4), actuation of a gear actuator (8) with at least one sensor and control program; transmitting information concerning at least one of the driving speed of the vehicle, the actuation of the clutch actuator (4), the actuation of the gear actuator (8) from the at least one of the sensor and the control program to a control unit (31); generating a first control command, with the control unit (31), based on the information transmitted from the at least one of the sensor and the control program, if the driving speed of the vehicle is essentially zero and the actuation of the clutch actuator (4) indicates an undesired engagement of the automatically shifted starting and gear-shift clutch (43) is initiated; transmitting the first control command from the control unit (31) to a first actuation mechanism (17, 18); actuating the gear actuator (8) with the first actuation mechanism (17, 18), when the first actuation mechanism (17, 18) receives the first control command, causing the gear actuator (8) to shift the automatic transmission (46) into a neutral position; generating a second control command with the control unit (31) based on the information transmitted from the at least one of the sensor and the control program, if a transmission gear is engaged and the actuation of the clutch actuator (4) indicates an undesired engagement of the automatically shifted starting and gear-shift clutch (43) is initiated; transmitting the second control command from the control unit (31) to a second actuation mechanism (14); and actuating the clutch actuator (4) with the second actuation mechanism (14), when the second actuation mechanism (14) receives the second control command, causing the clutch actuator (4) to disengage the automatically shifted starting and gear-shift clutch (43).
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Specification