Scavenging air manifold assembly for free-piston engine

Abstract

The invention relates to a scavenging air box assembly of a free piston engine, which comprises a scavenging air box and is characterized in that: the volume of the scavenging air box is equal to thatof a crankcase of the original engine, which aims at ensuring that the compression ratio of the scavenging air box is equal to that of the crankcase of the original engine; the matching position of the scavenging air box and a link rod is provided with a bushing which is an oil bearing; the link rod is connected with the bushing in transition fit, connected with the scavenging air box in shrinkage interference fit and fixed by bolts; the inner surface of the bushing is provided with two pressure-relieving grooves used for exerting sealing effect with a lubricating oil film and a guiding groove used for preventing the link rod from rotating during the moving process; and the guiding groove matches with a key arranged on the link rod. The scavenging air box assembly can overcome the defectsthat the movement of the piston component is difficult to control as the early free piston engine has complicated structure and relatively large mass and volume; the scavenging air box has the dual functions of storing pre-ignition mixed gases and serving as an air cushion, simplifies devices of the system as well as lowers cost simultaneously and increases economic benefit.

Description

technical field [0001] The invention relates to a free piston engine, in particular to a scavenging air box for the free piston engine. Background technique [0002] The free piston engine was born in the 1920s and matured in the 1930s to 1960s. Early free piston engines were mainly used to drive compressors to supply compressed air, or as gas generators to drive turbines to do work. It is mainly used in ships, locomotives, power stations and other fields. It has high power and large structural size. At that time, almost all of them used compression ignition engines. Since the technical conditions at that time could not solve some defects of the free piston engine itself, its development was restricted to a certain extent. However, with the comprehensive development of electronic control technology and internal combustion engine technology and the diversification trend of today's energy structure, especially with the introduction of the concept of hybrid power, the free pi...

AI Technical Summary

Problems solved by technology

[0003] However, the technical problem encountered in the research and development process is that the free-piston engine in this system is improved and designed on the basis of the traditional two-stroke engine, and the crankcase of the original machine was removed during the design process.

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