Siemens Aktiengesellschaft

Berthold Wolfram

Norbert Muller

Hubert Limbrunner

Frank Tettenborn

An internal combustion engine has an intake device (), the intake pipes (to) for the intakes of cylinders of the internal combustion engine and actuators for adjusting the effective pipe lengths of the intake pipes (to) by closing or opening at least one opening of the intake pipes (to) up to a hollow body and at least one actuator for controlling the actuators. Within a first speed range whose upper limit is a first threshold value (N), the actuators are moved into a closed position. For a speed (N), exceeding a first threshold value (N) and being less than a second threshold value (N), the actuators are moved into a leakage position. For a speed exceeding the second threshold value (N), the actuators are moved into an open position.

Method and device for controlling an internal combustion engine

The invention relates to a central locking installation for a motor vehicle, having a transmitter (2), operating as a key, and a receiver (4), operating as a lock. When the transmitter (2) is actuated for the purpose of closing or opening the door locks, a signal (3) is transmitted to the receiver (4) and produces a control pulse (20) there. Each transmitter (2) has its own transmitter recognition signal and a stock of code words, from which the code words are taken in sequence and are transmitted. The receiver (4) carries out a transmitter allocation using the transmitter recognition signal. The invention is based on the object of the transmitter (2) seeking its transmitter recognition signal itself. This is achieved in that a transmitter recognition signal, which is stored in a transmitter store (12) and is transmitted together with a code word, is generated randomly in the transmitter (2). The receiver (4) has an evaluation circuit, by means of which the transmitter recognition signal is compared with transmitter recognition signals which are already stored and is stored as a legitimate transmitter recognition signal in a receiver store (18) if it is not already so stored.

Growing community of inventors

Wuppertal, Germany

Berthold Wolfram