Nozzle type catalytic muffler for automobile diesel engine

Abstract

The invention relates to a nozzle-type catalytic muffler for an automobile diesel engine. The blue nozzle is arranged on the intake pipe outside the SCR catalytic muffler, and at the same time, a flow guide device for changing the gas flow direction is arranged in the muffler. By changing the gas flow direction, the exhaust gas It is fully mixed with high-purity urea solution for vehicles and then subjected to catalytic reduction treatment, thereby shortening the length of the engine exhaust pipeline, saving space and reducing costs. To keep warm, it is beneficial to the catalytic reduction reaction. A cooling channel for cooling water flow is provided outside the exhaust chamber of the catalytic muffler. The cooling water in the cooling channel is connected with the automobile heating system, and the waste heat in the exhaust gas is used for the automobile heating system. Provide heat source, so as to save energy and reduce emissions.

Description

Technical field: [0001] The invention belongs to the technical field of automobile exhaust emission mufflers, and in particular relates to a nozzle type catalytic muffler for automobile diesel engines. Background technique: [0002] With the development of the automobile industry and the enhancement of people's purchasing power, the production and ownership of automobiles in my country has gradually increased, and the pollution caused by automobile exhaust has become more and more serious. With the improvement of people's awareness of environmental protection, automobile exhaust pollution has become the most important issue in my country control pollution problems. [0003] With the improvement of environmental protection requirements, the emission standards of automobile engines have been gradually upgraded, and most engines with emission standards above China IV and China V have begun to use SCR exhaust after-treatment systems. The system needs Tianlan, Tianlan refers to t...

AI Technical Summary

Problems solved by technology

[0004] At present, the SCR exhaust after-treatment system used by diesel engines on the market requires an additional Tianlan injection device. The engine exhaust is treated by catalytic reduction. Most of the existing diesel engines arrange the blue nozzle on the exhaust pipe behind the engine booster. The blue and the exhaust gas are mixed through a certain length of exhaust pipe before entering the SCR catalytic muffler. In order to ensure the full mixing of the blue and the exhaust gas, the exhaust pipeline needs to have a sufficient length, which leads to the existing diesel engine automobile exhaust pipeline is relatively long, takes up a large space, and has a high cost

[0005] In addition, investigations and studies have shown that only about one-third of the energy released by automobile fuel combustion is effectively used, and the rest of the energy is lost or emitted into the atmosphere, resulting in a great waste of energy and adverse environmental impacts

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