Air valve structure of overall cylinder cover of medium-power diesel engine

Abstract

The invention discloses an air valve structure of an overall cylinder cover of a medium-power diesel engine, which comprises an air cylinder cover, wherein the air cylinder cover is provided with an inlet valve guide pipe hole, a bolt mounting hole, an exhaust valve guide pipe hole, an exhaust channel, an inlet channel, an electric control pump nozzle copper lining mounting hole, a bearing block mounting hole of an overhead camshaft arranged above the air cylinder cover, and a positioning pin hole; the cylinder center distance of two air cylinders is 178 millimeters; and an electric control pump nozzle is arranged in the electric control pump nozzle copper lining mounting hole. The air valve structure can meet the requirement on stable work at a high explosion pressure (18Mpa) to ensure that the diesel engine has excellent reliability and durability; and simultaneously, the air valve structure improves the output power of the diesel engine, meets the requirement on a mixed gas under various special working conditions to ensure that the diesel engine obtains good fuel economical efficiency and dynamic properties, improves the combustion efficiency, and reduces combustion noises and harmful emissions in a waste gas so as to achieve ohm III and ohm IV emission standards and meet the requirements of more and more stringent environmental protection regulations.

Description

Technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to a twenty-four valve structure of a medium-power diesel engine integral cover. Background technique [0002] At present, the commonly used inline six-cylinder diesel engine with a cylinder center distance of 170 mm has the main specifications of the 6135 series, etc. The maximum cylinder diameter is 135 mm, the stroke is 140 to 150 mm, and the displacement is 12 to 12.88 liters. When it is 2200r / min, its 12h output power is about 220kW. With the gradual increase in requirements for power, compactness and emission indicators of diesel engines for general purpose, marine, agricultural, power generation and construction machinery, it is required to be able to be used in the existing 6315 series diesel engine, that is, the cylinder diameter and stroke are unchanged. Under the premise, the output power of the diesel engine can be further improved to meet the requirement...

AI Technical Summary

Problems solved by technology

For these new requirements, the mechanical fuel supply system can no longer meet the requirements, and the traditional control method can no longer adapt to the requirements of the times. Due to the limited development history of diesel engines and diesel fuel supply system technology, the above-mentioned types of cylinder heads cannot meet the design requirements. Require

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