Volkswagen Ag

Uwe Hinrichsen

Edgar Bothe

Axel Schamscha

Henning Sebastian Vogt

Andreas Schwenger

Holger Lange

Henning Vogt

A method and a device for starting an internal combustion engine of a motor vehicle, the internal combustion engine exerting a drive torque on a crankshaft in one direction of the internal combustion engine, a starting motor exerting a starting torque on the crankshaft during a starting process to achieve a minimum rotational speed of the internal combustion engine, and a control unit regulating the starting torque. The control unit regulates the starting torque in a time-dependent manner between a positive maximum starting torque and a negative minimum starting torque during the starting process, a positive starting torque acting on the crankshaft in one direction and a negative starting torque in the opposite direction.

Method and device for starting an internal combustion engine

A method for a shift control of a power shift transmission includes closing an incoming, engaging clutch unit assigned to a new gear and opening the outgoing, disengaging clutch unit assigned to an old gear such that the closing and the opening overlap in time. The incoming clutch unit is closed after performing a filling operation for providing a filling pressure for the incoming clutch unit. The filling operation is concluded by a filling end. In case of a manually triggered power shift, the filling operation for the incoming clutch unit is performed with an increased filling pressure corresponding to an order of magnitude of the clutch capacity of the outgoing clutch unit. After the filling end is identified, the outgoing clutch unit is opened and, overlapping in time, a clutch capacity of the incoming clutch unit is adapted.

Method for a shift control of a power shift transmission

A method for controlling the shifting operation of an automated twin-clutch transmission includes executing a shifting operation between a load gear and a target gear assigned to a first transmission unit by using an intermediate gear assigned to a second transmission unit. The engine speed is adjusted to reach the synchronous speed of the target gear at the end of the shifting operation. At the start of the shifting operation an initial target speed gradient is set such that the engine speed reaches the synchronous speed at the end of the shifting operation based on an estimated total shifting time. The actual shifting progress is determined during the shifting operation and is compared with the estimated shifting progress. The target speed gradient is adjusted to the actual shifting progress in case the actual shifting progress and the estimated shifting progress deviate from one another.

Method for controlling the shifting of an automated twin-clutch transmission

In the embodiments disclosed in the specification, an apparatus for distinguishing between opposed directions of motion of a part having spaced magnetic variations contains an inductive magnetic sensor disposed adjacent to the path of motion of the variations and having portions with different magnetic couplings with the magnetic variations spaced in the direction of motion of the part.

Growing community of inventors

Braunschweig, Germany

Uwe Hinrichsen