Bayerische Motoren Werke Aktiengesellschaft

Martin Ranzmaier

Andreas Kerschbaummayr

Andreas Leyrer

Daniel Alberer

Bernhard Ramsebner

Josef Wasserbauer

Paul-Andre Rosenberger

Dietmar Schroeder

Andreas Keber

David Leitner

A vehicle drive has an internal combustion engine, an air conduit system, an exhaust system and a diagnostic unit for identifying a leak in the air conduit system of the internal combustion engine. The diagnostic unit is designed to carry out a method for diagnosing a leak in an internal combustion engine, including by determining mass flows in the air conduit system, and identifying a leakage mass flow.

Leak diagnosis for an intake system

An operating method for a fresh-air feed device for an internal combustion engine is configured for feeding fresh air from the environment surrounding the internal combustion engine into at least one combustion chamber of the internal combustion engine. A controllable throttle valve is configured for varying a through-flowable area of the fresh-air feed device and for at least partially shutting off the fresh-air feed device. The device has a compressor which is arranged upstream of the throttle valve in an intended through-flow direction from the environment into the combustion chamber, which is configured for conveying an air mass flow in the intended through-flow direction in the fresh-air feed device. A pre-compressor section of the device is arranged upstream of the compressor, an intermediate section is arranged downstream of the compressor device and upstream of the throttle valve, and a post-throttle section is arranged downstream of the throttle valve. A first air pressure sensor is arranged in the pre-compressor section, and a second air pressure sensor is arranged in the post-throttle section. In a first operating state, a first air pressure is measured via the first air pressure sensor. In a second step in the first operating state, a second air pressure is measured via the second air pressure sensor. Based on the second air pressure, a theoretical air pressure for the intermediate section is ascertained in a manner dependent on a theoretically through-flowable area set by the throttle valve. The theoretical air pressure is compared with the first air pressure or with a comparison value for the first air pressure. In the event of a deviation of the theoretical air pressure from the first air pressure or from the comparison value beyond an error threshold value, a corrective value for the ascertainment of the theoretical air pressure is determined.

Intake air guide with intake air pressure ascertainment and method for intake air pressure ascertainment

A controller for a motor vehicle having an internal combustion engine, and a device for detecting a fire in a fluid conduit, the device having a fluid state sensor for detecting a state variable of a fluid that is conducted in the fluid conduit, are provided. The determination of a fire situation is performed in a manner dependent on a signal of the fluid state sensor.

Sensor-based fire detection in a fluid conduit

Growing community of inventors

Wilhering, Austria

Martin Ranzmaier