Engine exhaust device being convenient to maintain and engine

Abstract

The invention discloses an engine exhaust device being convenient to maintain and an engine. The engine exhaust device comprises a shell, wherein the shell comprises a first shell body and a second shell body; a thrust step is arranged on the inner wall of the open end of each of the first and second shell bodies; a purification catalyst converter is arranged between the two thrust steps; a working cavity is divided by the purification catalyst converter into a first working cavity body and a second working cavity body; an exhaust pipe is arranged in the first working cavity body; a gas outlet pipe is arranged in the second working cavity body; the gas circulation area of the first working cavity body is larger than that of the exhaust pipe; the gas circulation area in the purification catalyst converter is smaller than that of the first working cavity body and that of the second working cavity body; and the gas circulation area of the second working cavity body is larger than that of the gas outlet pipe. The above engine exhaust device not only is simple and compact in structure and convenient to maintain, but also has the advantage that the compactness of the original engine structure can be guaranteed. Meanwhile, the engine exhaust device has the functions of purifying exhaust and effectively reducing the noise of the engine.

Description

technical field [0001] The invention belongs to the diesel engine tail gas treatment technology, in particular to an engine exhaust device and an engine which are easy to maintain. Background technique [0002] Most of the exhaust mufflers of small engines are silenced by setting pipe sections of different shapes and sizes and resonance cavities inside. With the increasingly stringent emission regulations, improving the pollutants in the exhaust of diesel engines has become a top priority. At present, small engines solve the problem of exhaust pollutants by installing a catalytic converter for exhaust purification of the engine in the exhaust pipe or exhaust muffler of the engine. In order to meet the requirements of engine exhaust purification, on the basis of ensuring the usage of catalytic converters for exhaust purification, the structures of engine exhaust pipes and exhaust mufflers will inevitably be enlarged and complicated. Contents of the invention [0003] The ...

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Problems solved by technology

[0003] The purpose of the present invention is to provide an engine exhaust device that is easy to maintain, which has the characteristics of simple and compact structure, convenient disassembly and assembly, stable and reliable operation, and has the functions of noise reduction and purification, so as to solve the problem of the original engine in the prior art. The problem of large-scale and complicated structure after the exhaust pipe or exhaust muffler is equipped with a catalytic converter

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