Equipment and method for recirculating exhaust gas of internal combustion engine, and corresponding internal combustion engine

Abstract

Equipment for recirculating exhaust gas of an internal combustion engine having an exhaust gas turbocharger, especially a diesel engine, comprises: an exhaust gas recirculating device with a recirculating valve, connected with a gas exhaust pipe and an inlet pipe of the internal combustion engine; at least one air compressor for compressing the extracted exhaust gas and connected with the gas exhaust pipe; at least one exhaust gas pressure container used for storing the compressed exhaust gas and connected with the air compressor; a gas transmission device connected with the at least one exhaust gas pressure container through a valve and connected with the inlet pipe of the internal combustion engine and an air inlet; and a control device for controlling the equipment. A method for recirculating exhaust gas of an internal combustion engine comprises the following steps of: (S1) extracting exhaust gas from the internal combustion engine at a suitable gas extracting normal operating point of the internal combustion engine; (S2) compressing the extracted exhaust gas and fresh air; (S3) storing the compressed exhaust gas and the compressed fresh air; and (S4) reciculcating the exhaust gas and the fresh air stored at a determined ratio into the internal combustion engine.

Description

Technical field [0001] The present invention relates to an apparatus and method for recirculating exhaust gas of an internal combustion engine with an exhaust gas turbocharger, especially a diesel engine. The invention also relates to an internal combustion engine. Background technique [0002] The use of internal combustion engines or internal combustion engines is governed by correspondingly applicable exhaust gas legislation worldwide. This includes consideration of nitrogen oxides, particulates, carbon monoxide, and incompletely combusted hydrocarbons. First of all, the focus of efforts to reduce is particulate and nitrogen emissions. For example, since 2013 / 14, the European legislature limits the particulate and nitrogen emissions of heavy-duty trucks to 0.4g / kWh nitrogen oxide and 0.01g / kWh particulates. See the number of the European Parliament and Senate on June 18, 2009 Regulation 595 / 2009 (EG). [0003] Nitrogen oxides are produced in three different ways during the c...

AI Technical Summary

Problems solved by technology

Here, the high outlay and loss of efficiency due to the additional installation of screw compressors is seen as a disadvantage

Images