Cylinder head of high-pressure common-rail diesel engine

Abstract

The invention belongs to the technical field of diesel engine designs and mainly relates to a cylinder head of a high-pressure common-rail diesel engine. The cylinder head is provided with a tangential intake passage I and a tangential intake passage II which are arranged up and down, wherein one end of the tangential intake passage I communicates with an air inlet I, and the other end of the tangential intake passage I communicates with a diesel engine combustion chamber through an air inlet III; one end of the tangential intake passage II communicates with an air inlet II, and the other end of the tangential intake passage II communicates with the diesel engine combustion chamber through an air inlet IV; an exhaust passage is further formed in the cylinder head; and one end of the exhaust passage communicates with a waste gas output I and a waste gas outlet II which are formed in the bottom surface of the cylinder head and both communicate with the diesel engine combustion chamber. The problem that the intake swirl rate impacts the internal combustion characteristics of the high-pressure common-rail diesel engine is solved, the intake resistance of the diesel engine is reduced, the intensity of air movement in a cylinder is weakened, and improvement of the oil-gas mixing rate is prevented.

Description

technical field [0001] The invention belongs to the technical field of diesel engine design, and mainly relates to a cylinder head of a high-pressure common rail diesel engine. Background technique [0002] The cylinder head is one of the important parts of the diesel engine. The closed space between its bottom surface, the top of the piston and the upper part of the cylinder liner forms the combustion chamber of the diesel engine. The high-pressure air from the intake port of the diesel engine is mixed with the fuel injected by the injector. Combustion generates high-temperature gas, pushes the piston connecting rod assembly to reciprocate up and down in the cylinder, and completes the entire working process of diesel engine air intake, compression, expansion, and exhaust; the air movement in the combustion chamber is very important for the formation and combustion of the mixture. influences. [0003] The intake and exhaust process of the working cycle of the diesel engine...

AI Technical Summary

Problems solved by technology

If the high-pressure common rail diesel engine uses the strong vortex inlet port designed in the prior art, the high-pressure injection will easily cause the spiral air flow to be uneven, forming a local vortex, causing the overlapping of the fuel injection beams, making the combustion worse, and the combustion is incomplete. Poor power performance, increased fuel consumption, and increased emissions

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