Arrangement for recirculating exhaust gas

Abstract

The invention relates to an arrangement for recirculating exhaust gas. An arrangement is provided with a low-pressure exhaust gas recirculation pipeline, and the low-pressure exhaust gas recirculationline branches off from an exhaust system, leads to an intake passage and includes a first valve, where the intake passage is longitudinally divided into an outer tube and an inner tube upstream of acompressor by a partition wall, where a second valve is disposed in the inner tube, and the exhaust line leads to the inner tube downstream of the second valve. Further, a method for controlling an amount of recirculated exhaust gas in a charge air flow is provided.

Description

technical field [0001] The invention relates to an arrangement for mixing recirculated exhaust gas and intake air in the opening region of an exhaust gas recirculation line in an intake tract of an internal combustion engine, as well as a motor vehicle with the arrangement and by means of the arrangement Methods. Background technique [0002] Exhaust gas recirculation systems (EGR systems) are used to reduce the emissions of nitrogen oxides produced during the combustion of fuel in internal combustion engines. To do this, exhaust gas is mixed with charge air and recirculated through the internal combustion engine. By mixing exhaust gas into intake air, its oxygen content is reduced, and with small fuel injections, the combustion temperature of the fuel-air mixture is reduced. Since the reaction rate of nitrogen oxide formation depends on the combustion temperature, less nitrogen oxides are formed at low combustion temperatures. [0003] With a low pressure (LP) EGR system...

AI Technical Summary

Problems solved by technology

The disadvantage of this strategy is that, at high discharge temperatures and large amounts of recirculated discharge gas, the materials of the compressor are loaded with high temperature and can be damaged

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