Multicomponent simultaneous measurement device in optics engine cylinder combustion process

Abstract

The invention discloses a multicomponent simultaneous measurement device in optics engine cylinder combustion process, and the multicomponent simultaneous measurement device is used to study the formation mechanism of carbon smoke in an engine cylinder. 266nm, 283nm and 1064nm three beams of detection laser are generated by cooperation of a Nd: YAG laser and a dye laser with a frequency doubling crystal group and a laser reflector group; energy distribution of the three beams of detection laser is achieved by adjustment of the angle of the frequency doubling crystal group, the three beams of detection laser excite polycyclic aromatic hydrocarbon fluorescence, hydroxyl fluorescent fluorescence and carbon smoke incandescence; a beam splitter mirror group, a filter group, a ICCD (Intensified charge coupled device) camera group and an acquisition computer group are used for acquisition of polycyclic aromatic hydrocarbon fluorescence, hydroxyl fluorescent fluorescence and carbon smoke incandescence signals; and the laser induced fluorescence and laser induced incandescence methods can be used for qualitative measurement of the concentration of polycyclic aromatic hydrocarbons, hydroxy and carbon smoke in an optics engine cylinder. The three components can be simultaneously measured only by use of one Nd: YAG laser and one dye laser, and the measuring device cost and the operation difficulty can be greatly reduced.

Description

technical field [0001] The invention relates to the field of measurement devices, in particular to a multi-component simultaneous measurement device in the in-cylinder combustion process of an optical engine, in particular to a simultaneous measurement device for polycyclic aromatic hydrocarbons, soot and hydroxyl in the in-cylinder combustion process of an optical engine. Background technique [0002] Soot is one of the harmful emission products in the combustion process of internal combustion engines, and is an important source of air pollution. In order to reduce the emission of soot from internal combustion engines, it is necessary to conduct in-depth research on the formation and oxidation mechanism of soot. The precursor of smoke can be regarded as the source of soot generation. Hydroxyl, as a sign of high-temperature combustion of fuel, is an important free radical in the oxidation process of soot. Therefore, the realization of polycyclic aromatic hydrocarbons, soot an...

AI Technical Summary

Problems solved by technology

In order to generate three probing laser beams and avoid the interaction between incandescent and fluorescent signals, three Nd:YAG lasers and one dye laser are required to generate the required three probing laser beams, which greatly increases the measurement setup. The operational difficulty and cost limit the application of this multi-component simultaneous measurement method

Images