Daimler Chrysler Ag

Rudolf Klein

Gregor Renner

Gunter Karl

Johannes Leweux

Christoph Lux

Ralf Kaufmann

Klaus Bruchner

Stephan Kramer

Peter Lautenschutz

Klaus Rossler

Alexander Anderson

Mario Mürwald

Matthias Schumacher

Harald Br&ouml;secke

Harald Brosecke

In a method for venting a crankcase of an internal combustion engine, in which, in a first operating range under part-load, the crankcase is vented via a first venting line, which opens into an intake line of the internal combustion engine downstream of a throttle valve, and in a second operating range under full load engine operation, the crankcase is vented via a second venting line, which opens into the intake line upstream of the throttle valve, the first venting line includes a control valve and a central unit is provided which operates the control valve so as to control the flow of vent gases through the first venting line over a range including a complete flow interruption under engine overrun condition to prevent venting gases from reaching the engine exhaust system when the internal combustion engine is operating in an overrun mode.

Method and apparatus for venting a crankcase of an internal combustion engine

In a method for early diagnosis of malfunctions of emission-improving measures, a pressure-operated actuating element is provided in an internal combustion engine, and this actuating element opens and closes as a function of an actuating pressure supplied a bypass passage that bypasses the turbine of an exhaust turbocharger, the actuating element being supplied with a diagnosis pressure as the actuating pressure to check its operation, and a fault signal being generated if the actual value of the intake pressure that establishes itself in the intake manifold of the internal combustion engine differs from a target value for the intake pressure.

Method and apparatus for checking the functioning of a pressure-operated actuating element in an internal combustion engine

Method for increasing the safety of motor-vehicle occupants in the event of a crash

In an internal combustion engine with an exhaust gas turbocharger having an exhaust gas turbine arranged in an engine exhaust pipe upstream of a catalytic converter and a bypass line branching off the exhaust pipe upstream of the exhaust gas turbine and rejoining the exhaust pipe between the exhaust gas turbine and the catalytic converter, a bypass valve is provided which is so controlled that, after startup of the internal combustion engine, the bypass valve is, during a catalytic converter heat-up period, at least partially opened when the internal combustion engine load is below a predetermined value and is only closed when the engine load is above the predetermined value.

Internal combustion engine with exhaust gas turbocharger

Growing community of inventors

Weinstadt, Germany

Rudolf Klein