Fuel oil uniform mixing and burning system of double air ports diesel engine

Abstract

The present invention relates to a fuel equipartition mixture and combustion device design proposal of two valve diesel. A fuel injector set on the cylinder cap and an inlet channel; a burning compartment is below the fuel injector and inlet channel; the inlet channel is eddy flow type inlet channel; a drop pit shape shrunk burning compartment in the shape of letter W is set above the valve; head section of the fuel injector stretches out of the bottom of the cylinder cap and against the burning compartment. Parameter design of cylinder cap, fuel injector and burning compartment make fuel and air adequate distribution in certain rules on axial and circumferential direction within effective combustion space, and realize oil gas mixing design of equal excess air factor within effective combustion space. Under effect of high jet pressure and air-intake transverse currents of fuel injection system, oil gas inside the cylinder mixes uniformly, velocity of combustion quicker, duration short, oil spout can be postponed, and high-efficiency quick burning of low discharge can be realized. Engine synthetic performance can be optimized through the invention, and engine power can be improved while nocuousness discharged object can be reduced.

Description

technical field [0001] The invention relates to a combustion device of an engine, in particular to a fuel oil uniform mixing and combustion device for a two-valve diesel engine shrinkage combustion chamber. Background technique [0002] In order to optimize the performance of the diesel engine, the design of the combustion system is the key. Small-bore diesel engines generally have a two-valve structure (one intake valve and one exhaust valve). The center line of the valve and the axis of the combustion chamber must be offset from the center line of the cylinder. The axis of the fuel injector must also deviate from the center of the combustion chamber and be arranged at an oblique angle. The position of the fuel injector is eccentric so that the lengths of the oil beams of each injection hole are not equal. At the same time, the inclined arrangement may make the distribution of fuel injection in the combustion chamber uneven. In the mixture of oil and gas in the cylinder of ...

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Problems solved by technology

In recent years, there are few domestic original works on the research on the oil-gas mixing distribution of the necking combustor used for low-emission requirements, especially for the low-emission design. The inventor believes that it is necessary to study the oil-gas mixing and combustion in the effective space of the combustor from the concept of space and time. , so the complete fuel oil uniform distribution scheme in the combustion chamber space has not yet been solved, and the quantitative spatial uniform distribution design is still difficult, which has always been a technical problem that people expect to solve

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