Interference spray test device for opposed piston engine

Abstract

The present invention discloses an interference spray test device for an opposed piston engine. The device comprises a constant volume bomb system, an air intake and exhaust system, a fuel oil jettingsystem, a high-speed photographing system and a control and acquisition system; the constant volume bomb system is used for simulating the internal condition of a combustion chamber when opposed pistons are located at inner dead points so as to realize a fuel oil jetting, collision and atomization experiment; the air intake and exhaust system is used for providing corresponding jetting back pressure for the interior of the constant volume bomb of the constant volume bomb system and discharging oil mist exhaust gases in the process of the experiment; the fuel oil jetting system is used for establishing oil pressure meeting the requirements of the experiment and realizing fuel oil jetting; and the high-speed photographing system is used for capturing and recording spray structures in a spray field; and the control and acquisition system controls a spray direction, oil jetting pressure and a photographing process, realizes the photographing control of fuel oil jetting and atomization andobtains the process image of spray development, and completes the acquisition of test data. With the test device of the invention adopted, on the one hand, jetting back pressure in a cylinder can beeffectively simulated, and on the other hand, flexible adjustment of interference spray at different angles can be realized.

Description

technical field [0001] The invention belongs to the technical field of engines, and in particular relates to an interference spray test device for an opposed-piston engine. Background technique [0002] Opposed-piston two-stroke diesel engines often use dual injectors for fuel injection. The arrangement of the injectors is restricted by structural conditions, and the oil jets are prone to collisions. Oil beam collision accelerates the secondary breakage of fuel droplets, which is an effective means to obtain uniform spray. [0003] At present, the understanding of the mechanism of fuel collision, fragmentation and evaporation is still unclear, so the research on fuel spray mostly adopts experimental methods. At present, three methods are mainly used to study the process of in-cylinder fuel injection: visual single-cylinder test machine, rapid compression expander and constant volume bomb system. Among them, the constant volume bomb system has the characteristics of simple ...

AI Technical Summary

Problems solved by technology

For the interference spray test of the two injectors arranged on the side wall of the cylinder liner of the new opposed-piston two-stroke engine, at present, the existing constant volume bomb is often improved and designed, which cannot better meet the requirements of the interference spray test at different angles.

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