Combustor assisted without air source for engine

Abstract

The invention relates to the technical field of engines, in particular to a combustor assisted without an air source for an engine. The combustor comprises a shell, a fuel atomization structure and astable flame combustion chamber assembly, wherein the two ends of the shell are subjected to tapping and shrunk to form an air inlet and an air outlet, and the air inlet communicates with an exhaust pipeline of the engine; the fuel atomization structure provides atomized fuel for the stable flame combustion chamber assembly, and the spraying direction of the atomized fuel is the same with the flowdirection of the engine exhaust in the shell; and the stable flame combustion chamber assembly is arranged in the shell, and provides the space for the mixing and combustion of the atomized fuel andthe engine exhaust. The combustor assisted without the air source for the engine has the beneficial effects that the structure is simple, the engine exhaust changes the speed difference of the fuel through the expansion and shrinkage of the air inlet and the air outlet of the shell, so that the engine exhaust reacts with the full combustion of the fuel; and the atomized fuel and the engine exhaustare uniformly distributed and ignited in the stable flame combustion chamber assembly, continue to combust in the air outlet, and the combustion efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a burner without air source assistance for engines. Background technique [0002] Diesel engine exhaust contains inhalable particulate matter, which seriously endangers human health. National VI emission standards not only impose stricter restrictions on the quality of particulate matter, but also impose requirements on the number of particulate matter (PN). Therefore, heavy-duty diesel engines meet the national Six emission regulations must adopt DPF; DPF (Diesel Particulate Filter, Diesel Particulate Filter) is a device installed in the exhaust system of diesel vehicles to reduce particulate matter (PM) in the exhaust by filtering. In addition, many cities have proposed that vehicles in use in China IV and V must install DPF devices to meet emission requirements. The DPF has a wall-flow structure, and the purpose of removing particles is achieved by trapping the particles in t...

AI Technical Summary

Problems solved by technology

The DPF has a wall-flow structure, and the purpose of removing particles is achieved by trapping the particles in the exhaust gas on the wall of the filter. However, the continuous accumulation of particles leads to the clogging of the DPF, which causes the increase of the exhaust back pressure and the deterioration of the fuel economy of the engine. Therefore, it is necessary to periodically regenerate the DPF filled with particulate matter to restore its filtering function

[0003] The existing DPF periodic regeneration scheme is the burner bypass technology, which introduces the engine exhaust gas into the burner through the bypass pipeline, then injects fuel for combustion, and then introduces the exhaust gas after combustion into the engine exhaust pipe, but due to the lack of fresh Air assist, the oxygen content in the exhaust gas is lower than that of a burner with fresh air assist, the combustion efficiency is low, and the effect of removing particulate matter in the DPF is not good

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