Daimler Chrysler Ag

Daimler Ag

Daimlurchrysler A.g.

Andreas Schondelmaier

Torsten Scholt

Matthias Schorpp

Harald Braun

Norbert Ebner

Dirk Sundheim

In a drive train and a method for operating the drive train for a motor vehicle, comprising a hydraulically shiftable transmission unit with an input shaft connectable to an internal combustion engine via a first clutch, a first electric motor, and an oil pump which supplies the transmission unit with pressurized oil and which is driven by the internal combustion engine or by an electric pump motor, the electric pump motor for driving the oil pump is in the form of a sensorless electric motor, and if required, the first electric motor is energized and coupled to the oil pump in order to assist starting the electric pump motor.

Drive train

A control method for an internal-combustion engine, working with a variable stopping delay. The stopping delay is essentially affected by the following parameters:

Method for automatically stopping an internal combustion engine with a variable stopping delay

In a drive arrangement for a motor vehicle, comprising an internal combustion engine and a power electronic unit for controlling an electric machine, the power electronic unit is arranged on a carrier and the carrier comprises a cooler which includes coolant passages and is mounted on the engine such that the coolant passages are in direct communication with coolant passages of a cooling circuit of the internal combustion engine.

Drive arrangement for a motor vehicle

A method and a device for automatically starting an internal combustion engine having a brake pressure monitoring system and an arrangement evaluating the brake pressure with respect to its profile over time. The brake pressure gradient is evaluated when the brake pedal is released before the vehicle is restarted. If the absolute value of the negative brake pressure gradient when the brakes are released exceeds a threshold value, this upward transgression of the threshold value causes an electronic control system in the motor vehicle to restart the internal combustion engine in conjunction with a start/stop function. The main advantage which is achieved in this way is that the brake pressure gradient precedes the point at which the brake pressure reaches its position of rest so that a vehicle driver can sense the restarting of the internal combustion engine to be more spontaneous than in the prior art. With the solution according to the invention for restarting the internal combustion engine a longer period of time is available than with previously known solutions.

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Erdmannshausen, Germany

Andreas Schondelmaier