Double-channel exhaust pipe for taking gas from channel closest to supercharger through EGR

Abstract

The invention provides a double-channel exhaust pipe for taking gas from a channel closest to supercharger through EGR, and belongs to the technical field of engine exhaust gas recirculation. The double-channel exhaust pipe for taking gas from the channel closest to the supercharger through EGR comprises a first exhaust manifold and a second exhaust manifold. A first air inlet, a second air inlet and a third air inlet are respectively formed in the bottom of the first exhaust manifold; and the top of the first exhaust manifold communicates with a first EGR gas taking pipe and a second EGR gas taking pipe. A double-channel EGR system connected with the first EGR gas taking pipe and the second EGR gas taking pipe is adopted at the top of the first exhaust manifold; in order to be matched with a double-channel EGR valve, the engine exhaust pipe is composed of a 1-3-cylinder exhaust manifold and a 4-6-cylinder exhaust manifold; and each cylinder exhaust manifold is provided with an EGR gas taking opening corresponding to an inlet of the double-channel EGR valve. The EGR gas taking opening is formed in the inlet position of the supercharger, so that gas flow is smoother.

Description

Technical field [0001] The present invention relates to the field of engine exhaust gas recirculation, and in particular, there is a dual flow exhaust pipe of passage EGR extravasation from the across the supercharger. Background technique [0002] Engine EGR technology, also known as engine exhaust gas recirculation technology. It is a technique that the automotive internal combustion engine is partially inhaled and introduced into the suction side after combustion. [0003] After the existing technical exhaust manifold, a single air opening to the EGR system is used. Since the exhaust pressure and the intake pressure pressure difference are small, it cannot meet the relatively high EGR demand, that is, it is difficult to meet the requirements of Six emissions. Inventive content [0004] In order to make up the above insufficient, the present invention provides a dual flow exhaust pipe that is closest to the passage EGR from the supercharger, aimed at improving the existing tec...

AI Technical Summary

Problems solved by technology

[0004] In order to make up for the above deficiencies, the present invention provides a double-channel exhaust pipe that takes air from the EGR channel closest to the supercharger, aiming at improving the prior art exhaust manifold and adopting a single air intake to the EGR system. The pressure difference between the air pressure and the intake pressure is small, which cannot meet the relatively high EGR rate requirement

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