Two-stroke diesel engine admission passage

Abstract

The invention relates to a two-stroke diesel engine admission passage. The admission passage adopts a symmetrical volute structure. Inlet air pipes (1) for air to flow in are arranged on the two sides of the volute structure, the inner sides of the inlet air pipes (1) adopt rounded corner structures, a vortex air intake row (3) and a direct air intake row (4) are arranged at the middle part of the volute structure of the admission passage, the vortex air intake row (3) and the direct air intake row (4) form an air flow outlet (2), the vortex air intake row (3) is provided with 12 first air openings (5) in the circumference, the direct air intake row (4) is provided with 12 second air openings (6) in the circumference, the included angles of the first air openings (5) and the tangent lines in the peripheral directions are 6 to 9 degrees, and the included angle of every two first air openings (5) is 20 degrees, the thicknesses of the first air openings (5) on the vortex air intake row (3) are 5.5 mm, the included angle of every two second air openings (5) is 26 degrees, and the thicknesses of the second air openings (6) in the direct air intake row (4) are 9 mm. The two-stroke diesel engine admission passage provided by the invention is beneficial to forming and burning of mixed gas in a cylinder.

Description

technical field [0001] The invention belongs to the field of mechanical structures, and in particular relates to an intake port of a two-stroke diesel engine. Background technique [0002] Different from the four-stroke internal combustion engine, the two-stroke internal combustion engine only needs two piston strokes to complete a working cycle, and each downward stroke of the piston is a power stroke, which also has exhaust and air intake functions. Two-stroke diesel engines do not have a separate air intake. And exhaust process, can not use the crankcase to scavenge, mainly rely on the pressure difference between the intake and exhaust ports for scavenging, so the structure of the ventilation system of the two-stroke internal combustion engine is quite different from that of the traditional four-stroke internal combustion engine. [0003] The design of the intake port directly determines the gas flow performance during the ventilation process, and is the key to the perfo...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a two-stroke diesel engine intake port with higher intake flow coefficient and scavenging efficiency for the problem that the two-stroke diesel engine does not have a separate intake and exhaust process, resulting in uneven intake and exhaust.

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