Collision atomization stream-extrusion combustion system of internal-combustion engine

Abstract

The invention discloses a collision atomization stream-extrusion combustion system of an internal-combustion engine, which belongs to the field of formation and combustion of gas mixtures of engines. The system comprises a combustion chamber (4) which consists of a cylinder cover (1), a cylinder sleeve (2) and a piston (3) and an oil injection nozzle (5) serving as a multi-hole oil nozzle, wherein a bump (8) is arranged in the center of the piston (3) and is formed by a folding fan surface which uses a convex top (9) as a center and is continuously and radially distributed. A one-time oil bundle is diffused through a collision part along a collision surface and cannot be accumulated on a drop point, and mist spray has a high diffusion speed and a large distributed spatial range and is not close to the wall of the combustion chamber, so that the involved quantity of air is increased; secondary atomization is realized, so that the grain size of the mist spray is thinned, and the mist spray is more uniformly distributed under the action of extrusion flow; therefore, a relatively uniform gas mixture can be relatively quickly formed; and the quality of a combustible gas mixture of the engine is effectively improved, so that combustion is quick and complete.

Description

technical field [0001] The invention relates to an internal combustion engine collision spray squeeze flow combustion system, which belongs to the field of engine mixture gas formation and combustion. Background technique [0002] At present, the excess air coefficient of the diesel engine is relatively large but it is easy to emit black smoke. The main reason is that the porous spray is not uniform in the circumferential direction, and there is an over-concentrated area at the point where the spray falls, and there is little spray near the center of the combustion chamber. . A part of the spray accumulates near the impact point or forms an oil film, and the other part rebounds and spreads to the circumference, because it is close to the wall of the combustion chamber and the amount of air involved is small. These factors constitute the main cause of carbon formation on the wall of the combustion chamber despite the large excess air coefficient of the diesel engine, but the...

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Problems solved by technology

[0003] In order to solve the problems of too thick mixed gas and uneven distribution of the circular spray at the landing point of the porous spray, and the short penetrating distance of the umbrella-shaped spray, the present invention provides an internal combustion engine collision spray squish flow combustion system, which can provide good atomization performance , The space distribution is uniform, the spray will not accumulate at the landing point, but a small part will be rebounded, and most of it will spread rapidly along the collision surface to achieve secondary atomization

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