Main and auxiliary oil injection system of high-power-density diesel engine

Abstract

The invention discloses a main and auxiliary oil injection system of a high-power-density diesel engine, and belongs to the related technical field of diesel engines. The main and auxiliary oil injection system comprises a main oil injector, an auxiliary oil injector and a combustion chamber. The main oil injector is arranged on an air cylinder cover, and the central axis of the main oil injector is superposed with the central axis of an air cylinder. The auxiliary oil injector is obliquely arranged on the air cylinder cover, and the central axis of the auxiliary oil injector and the central axis of the air cylinder are located on the same plane. The main oil injector comprises a main oil injection nozzle, and a plurality of oil injection holes are formed in the circumferential direction of the main oil injection nozzle. The auxiliary oil injector comprises an auxiliary oil injection nozzle, and a plurality of oil injection holes are formed in the side close to the main oil injector, so that auxiliary oil injector fuel oil mist beams sprayed out of the auxiliary oil injection nozzle point to the central area of the combustion chamber. The system comprises the main oil injector and the auxiliary oil injector, the two oil injectors inject oil simultaneously, the oil injection rate can be increased, the oil injection duration is shortened, the problem that the oil injection rate of a single oil injector in the high-power-density diesel engine is insufficient is effectively solved, and therefore rapid combustion and a higher index of power per liter are achieved.

Description

technical field [0001] The invention belongs to the technical field related to diesel engines, and more specifically relates to a main and auxiliary fuel injector system suitable for high power density diesel engines. Background technique [0002] In order to meet the ever-shrinking requirements of the power compartment of special vehicles (such as tanks), the degree of enhancement of the engine is getting higher and higher, and its power index has broken through 100-110kW / L, and is heading towards the goal of 120kW / L or even higher. develop. [0003] For safety and power considerations, the characteristic engine is generally a diesel engine. The combustion of a diesel engine is a diffusion combustion dominated by spray mixing. To increase the liter power of the diesel engine, correspondingly, it is necessary to increase the fuel injection quantity and the fuel injection law of the diesel engine. [0004] When the liter power index rises to a certain level, the single fue...

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a main and auxiliary fuel injector system suitable for high power density diesel engines. Optimize the matching relationship of the fuel mist beams of the main and auxiliary injectors, thereby solving the technical problem of insufficient fuel injection rate of a single injector in traditional high power density diesel engines

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