Volkswagen Ag

Werner Aberle

Achim Freitag

Jörn Müller

Lothar Nee

Jens Jeschke

Axel Groenendijk

Thomas Lang

Dieter Mannigel

Hans-Georg Nitzke

Uwe Scher

Jörg Larink

Jürgen Wendt

An internal combustion engine has a high-pressure exhaust-gas recirculation line and a low-pressure exhaust-gas recirculation line with a low-pressure exhaust-gas recirculation valve. The low-pressure exhaust-gas recirculation line branches off from the exhaust-gas system downstream of a turbine of an exhaust-gas turbocharger and opens into a fresh-air system upstream of a compressor of the exhaust-gas turbocharger. An exhaust-gas flap is disposed in the exhaust-gas system downstream from where the low-pressure exhaust-gas recirculation line branches off from the exhaust-gas system. At least one pressure sensor is disposed in the low-pressure exhaust-gas recirculation line and configured such that the at least one pressure sensor determines a pressure difference in the low-pressure exhaust-gas recirculation line between a point upstream of the low-pressure exhaust-gas recirculation valve and a point downstream of the low-pressure exhaust-gas recirculation valve. A method for operating an internal combustion engine is also provided.

Internal combustion engine with an exhaust-gas recirculation and method for operating an internal combustion engine

An exhaust-gas recirculation device for an internal combustion engine, in particular for a diesel engine of a passenger car, includes an air-supply line connected to an air inlet of the internal combustion engine and includes an exhaust-gas line connected to an exhaust-gas outlet of the internal combustion engine. A turbine, which drives a compressor disposed in the air-supply line, is disposed in the exhaust-gas line. The exhaust-gas line is connected to the air-supply line via an exhaust-gas recirculation line branching off in flow direction behind the turbine. An adjustable throttle is disposed in the air-supply line in flow direction in front of the compressor in order to achieve higher exhaust-gas recirculation rates. A method for operating an exhaust-gas recirculation device for an internal combustion engine is also provided.

Exhaust-gas recirculation device and method for operating an exhaust-gas recirculation device

The invention relates to an exhaust gas recirculation meansfor an internal combustion enginewith an air supply linewhich has an air coolerand which is connected to the air inletof the internal combustion engine, and with an exhaust pipewhich is connected to the exhaust gas outletof the internal combustion engine, the exhaust pipebeing connected by way of a closable exhaust gas recirculation lineto the air supply line, and the exhaust gas recirculation linebeing connected in the flow direction to the air supply lineupstream from the air cooler. Furthermore the invention relates to a process for operating such an exhaust gas recirculation means. To improve the dynamics of the internal combustion engine, for the exhaust gas recirculation meansit is proposed that the air coolerhas a bypass air line. With respect to the process for operating the exhaust gas recirculation meansit is proposed that in the aforementioned exhaust gas recirculation means, when the exhaust gas recirculation lineis at least partially opened, the bypass air lineis at least partially opened and the cooler supplyis closed.

Exhaust gas recirculation means and process for operation of the exhaust gas recirculation means

Growing community of inventors

Leiferde, Germany

Werner Aberle