Oil injection system suitable for high-power-density diesel engine

Abstract

The invention discloses an oil injection system suitable for a high-power-density diesel engine, and belongs to the related technical field of diesel engines. The oil injection system comprises a main oil injector vertically arranged in the center of a cylinder cover and an auxiliary oil injector obliquely arranged on the cylinder cover. The main oil injector and the auxiliary oil injector are provided with a plurality of oil injection holes. The auxiliary oil injector is provided with a plurality of oil injection holes. One oil injection hole of the main oil injector and one oil injection hole of the auxiliary oil injector are oppositely arranged. The multiple oil injection holes of the main oil injector are symmetrically distributed in the circumferential direction of the main oil injector through the center axis of the oil injection hole opposite to the auxiliary oil injector, and the angles between the adjacent oil injection holes are gradually increased in the direction away from the auxiliary oil injector. According to the oil injection system, the oil injection holes of the main oil injector are distributed sparsely in the side provided with the auxiliary oil injector, the oil injection holes of the main oil injector are distributed densely in the side away from the auxiliary oil injector, the problem that overall fuel oil distribution is uneven and asymmetric due to existence of the auxiliary oil injector can be balanced and compensated, and fuel oil in a diesel engine cylinder is evenly and symmetrically distributed integrally.

Description

technical field [0001] The invention belongs to the technical field related to diesel engines, and more specifically relates to a fuel injection system suitable for high power density diesel engines. Background technique [0002] In order to meet the continuous shrinking requirements of the power compartment of special vehicles (such as tanks), the engine has been strengthened more and more, and its power index has exceeded 100-110kW / L, and is moving towards the goal of 120kW / L or even higher. develop. For safety and power considerations, special engines are generally diesel engines. The fuel of a diesel engine is diffuse combustion dominated by spray mixing. To increase the liter power of the diesel engine, correspondingly, it is necessary to increase the fuel injection volume and fuel injection rate of the diesel engine. For this reason, two fuel injectors, one main and one auxiliary, can be installed in the cylinder. The main injector is installed vertically in the cen...

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Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a fuel injection system suitable for high power density diesel engines. Uniform layout, optimize the distribution characteristics of fuel in the combustion chamber, so that the overall distribution is relatively uniform, thereby solving the technical problem of uneven and asymmetric distribution of fuel and equivalence ratio in the main and auxiliary injector systems of traditional high power density diesel engines

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