摘要:
The invention relates to a method and a device for controlling a clutch, for example an automatic friction clutch in the drive train of a motor vehicle, for transmitting torque between a drive engine and a transmission, significant points on the clutch path being allocated to the clutch. In order to establish operability of the clutch as quickly as possible while ensuring a precise clutch adjustment, a clutch path coordinate system determined in a learning process and comprising clutch path points which are at least relevant for starting is monitored by checking the point of engagement of the clutch, and the system is corrected if a change is detected and is otherwise used unchanged.
摘要:
The invention relates to a device for controlling a fluid-activated double-action operating cylinder (2) with two cylinder chambers (6, 8) separated from one another by a control piston (4) and with respectively one on-off valve (12, 14) assigned to one of the cylinder chambers (8, 8} for controlling the fluid inflow and fluid outflow for the cylinder chambers (6, 8), furthermore with a pressure sensor device (40) for detecting the fluid supply pressure, and with a control device (20) connected to the on-off valves (12, 14) and the pressure sensor device (40). In order to detect the actual regulating power of the operating cylinder (2), a differential pressure sensor (40) is arranged between the cylinder chambers (6, 8), which sensor is connected to the control device (20). The output signal of the differential pressure sensor (40) can be processed in the control device (20) and used to control a pressure control valve (22) arranged in the pressure fluid line (32).
摘要:
The invention relates to a method for actuating a through-connection clutch of a vehicle wherein a positive engagement part of the clutch is opened upon near absence of torque in the drive train, a shifting is carried out and the clutch is closed again after the shifting. According to the invention, the torque transferred via the positive connection of the clutch is influenced by a motor control in order to obtain an absence of torque on the positive connection of the clutch, wherein the positive connection is pre-tensioned before attaining the absence of torque and is immediately separated after attaining the absence of torque.
摘要:
The invention relates to a method for actuating a clutch (6) of a drivetrain of a motor vehicle, wherein, for a rolling movement of the motor vehicle on a downward slope when the throttle pedal is not actuated, and for a coasting movement of the motor vehicle on a flat surface when the throttle pedal is not actuated, a clutch position of the clutch (6) is determined as a function of a rotational speed difference between an input rotational speed of a transmission (2) of the drivetrain and an idle speed of a drive unit (1) of the drivetrain. According to the invention, the clutch position determined from the rotational speed difference between the transmission input rotational speed and the drive unit idle speed is corrected with at least one variable which is dependent on a vehicle acceleration.
摘要:
The invention relates to a method for operating a transmission of a motor vehicle, wherein the transmission is arranged in a drive train between a drive apparatus and an axle drive, wherein an input shaft of the transmission is connected to the drive apparatus via a controllable separating clutch (K) and an output shaft of the transmission is connected to the axle drive, wherein power can be diverted from the transmission to drive an auxiliary drive (PTO) and wherein, in order to activate or connect the auxiliary drive (PTO), an idle speed of the drive apparatus is first demanded via an engine engagement, the transmission is then shifted into neutral and the separating clutch (K) is opened and then the separating clutch (K) is then closed again and the engine engagement is withdrawn. According to the invention, the separating clutch (K) is closed such that the separating clutch (K) is first partially closed at a position-dependent or path-dependent clutch speed, that a transmission input speed and a drive apparatus speed are monitored during the partial closing of the separating clutch (K) at the position-dependent or path-dependent clutch speed, wherein then, when the transmission input speed has approximately reached the drive apparatus speed and the drive apparatus speed approximately corresponds to the idle speed of the drive apparatus, the separating clutch (K) is no longer closed at the position-dependent or path-dependent clutch speed but rather completely closed at maximum clutch speed.