Zf Friedrichshafen Ag

Kai Leingruber

Roland Mair

Paul Bange

Ulrich Schmidt

Matthias Dietlmeier

Philipp Schmachtenberger

Christian Aigner

Georg Willmann

Gerd Muellerschoen

An electrical assembly () having a first ground connection (), a second ground connection (), and a supply connection (). The electrical assembly is designed for connecting with an electrical voltage between the supply connection () and at least one of the ground connections (). The assembly () includes a first electrical consumer () which is connected to the supply connection () and the first ground connection (). A component () connects the second ground connection () to the first consumer (). The component () is designed to produce a predetermined voltage drop.

Electrical unit

A method of operating a vehicle drivetrain for rocking the vehicle free. The drivetrain has a transmission with an input and an output that can be coupled by a clutch. The input and output are connected to a drive aggregate and a drive output, respectively. The clutch is actuated based on driver actuation of an accelerator and a rotational speed of the drive output such that following accelerator actuation, when its actuation decreases, the clutch disengages with a first opening gradient. Then, based on a calculated point in time at which drive aggregate torque upon the clutch corresponds to torque on the clutch from the drive output, the clutch disengages with a second, smaller opening gradient. And depending on a rotational speed of the drive output relative to a limit value, the clutch either initiates or terminates engagement with a first closing gradient.

Method and controller for operating a drivetrain of a vehicle

A method for operating an automatic transmission with resistance change in a control system of the automatic transmission includes detecting an electrical resistance increase in a control loop for a shift element actuator of the automatic transmission, adjusting an electrical current to the shift element actuator in response to the electrical resistance increase, and shifting the automatic transmission to a gear in which the shift element is in the open operating state. A related control device for an automatic transmission is also provided.

Method for operating an automatic transmission with resistance change in a control system of the automatic transmission

A method of regulating a vehicle drive-train in which actuation of an automatic starting element is regulated when starting the vehicle, and, during this regulation, monitoring a predetermined travel direction, reception of a brake release command and reception of a drive command. Furthermore, after receipt of the release command, the vehicle is held stationary, by a holding operation of the vehicle, until the drive command is received. If movement of the vehicle in a direction opposite to the predetermined travel direction is detected, actuation of the starting element is increased to a firmer engagement level. Once the driver releases the brake and until the drive command is received, if further movement of the vehicle, in the predetermined travel direction, is detected, then actuation of the starting element is decreased toward a lesser engagement level.

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Ravensburg, Germany

Kai Leingruber