CN2229527Y

CN2229527Y - Two-stroke engine

Info

Publication number: CN2229527Y
Application number: CN 95214194
Authority: CN
Inventors: 许成勋; 陈光爱
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-06-09
Filing date: 1995-06-09
Publication date: 1996-06-19
Anticipated expiration: 2005-06-09

Abstract

The utility model relates to a two-stroke engine, belonging to the improvement of the two-stroke engine. The two-stroke engine comprises a cylinder body (10), a piston (5), a crankcase (17), a crankshaft (18), a connection rod (1), etc. A middle partition plate (4) is arranged between the piston (5) and the crankcase (17). An oil passage (13) is arranged on the cylinder body (10). A positioning device is arranged on the center axial line of the piston (5). After the utility model adopts the structure, the defects which can not be solved, such as incomplete combustion due to mixed oil combustion, serious environment pollution due to a great amount of machine oil discharge, etc. of the original engine are overcome. Meanwhile, friction between the piston and the cylinder body is reduced. The service life is greatly prolonged. The utility model is the innovation of the present two-stroke engine.

Description

Two stroke engine

The utility model relates to the improvement of two stroke engine.

The existing two stroke engine that uses, all adopt the burning miscella, as mixing machine oil in the gasoline, cause gasoline combustion incomplete, outlet pipe has a large amount of machine oil to discharge, serious environment pollution, in case and machine oil ratio deficiency in the gasoline, very easily cause parts to damage, adopt crankcase scavenging simultaneously, cause crankcase scavenging gas circuit complexity, and the sealing line length is difficult for shortcomings such as sealing.

In view of the deficiency that prior art exists, the purpose of this utility model aims to provide a kind of pure oil firing and does not adopt the two stroke engine of crankcase scavenging.

Another purpose of the present utility model is to adopt the center positioning mechanism of piston, reduces the wearing and tearing of piston and cylinder body.

The utility model is finished as follows: the utility model comprises cylinder body (10), cylinder cap (7), piston (5), crankcase (17), bent axle (18), connecting rod (1), suction port (14), air outlet (6), spring valve (15), Carburetor (16), spark plug (8), between described piston (5) and crankcase (17), set up central diaphragm (4), oil duct (13) is set on described cylinder body (10).

On above-mentioned piston (5) positioning device is set, this positioning device connects with connecting rod (1) by central diaphragm (4) and forms by being located at positioning rod (3) on the piston middle spindle line, and cross plate (2) is set on the described positioning rod (3).

Above-mentioned oil duct (13) is arranged on piston (5) back and forth on the cylinder body (10) within the stroke of operation, and this oil duct (13) connects with the oil pump in the oil sump by oil pipe.

The utility model compared with prior art, rational in infrastructure, long service life, and economize on oil mass significantly reduces atmospheric pollution.

The utility model has following accompanying drawing

Fig. 1 is a structural drawing of the present utility model

Accompanying drawing has been represented structure of the present utility model, in conjunction with the embodiments structure of the present utility model and principle thereof is described in further detail below again.The utility model comprises cylinder body (10), cylinder cap (7), piston (5), crankcase (17), bent axle (18), connecting rod (1), suction port (14), air outlet (6), spring valve (15), Carburetor (16), spark plug (8), between described piston (5) and crankcase (17), set up a central diaphragm (4), on described cylinder body (10), set up an oil duct (13), this oil duct (13) must be located at piston (5) back and forth operation on the cylinder body (10) within the stroke of process, thereby reach the purpose that the piston bore friction utilizes hydrostatic lubrication, described central diaphragm (4) is fixed on the cylinder body (10), and the centre has a through hole to run through positioning rod (3).The utility model is the boundary with piston (5), whole cavity is divided into upper and lower two Room (9), (12), last chamber (9) is the compression and combustion chamber, following chamber (12) is air-breathing scavenging chamber, two Room communicate when scavenging, the utility model adopts central diaphragm (4) that following chamber and crankcase (17) are kept apart simultaneously, makes machine oil not participate in burning, thereby has overcome shortcomings such as using crankcase (17) scavenging gas circuit complexity, sealing line length.

Adopt the utility model structure, burns gasoline then is a two-stroke gasoline engine, also can make corresponding change after-combustion diesel oil or other oils.

The utility model is provided with positioning device on piston (5), this positioning device is formed by central diaphragm (4) and connecting rod (1) connection by the positioning rod (3) that is located on piston (5) central axis, cross plate (2) is set on the described positioning rod (3), stability when adopting this positioning device to increase substantially reciprocating motion of the pistons, the amplitude that swings when reducing piston (5) work, thereby reduced the wearing and tearing of piston (5), prolonged the working life of motor with cylinder body (10).

During engine operation, power passes to connecting rod (1) from piston (5) through positioning rod (3) and cross plate (2), bent axle (18), piston (5) is up, then descend the chamber to form certain degree of vacuum, spring valve (15) is opened, mixed steam enters down chamber (12), last chamber is compressed in (9), igniting, outburst, piston (5) is descending immediately, opens relief opening (6) earlier, after High Temperature High Pressure waste gas is got rid of major part from relief opening (6), piston (5) continues descending, flammable mixed steam is compressed in the following chamber (12), when scavenging port (11) when opening, and cleaning remainder of exhaust gas in the compressed mixed steam chamber of entering in the following chamber, finish to the lower dead center scavenging at descent of piston, go up the chamber when piston is up again and close scavenging port (11) earlier, close relief opening (6) again, begin next circulation by that analogy.

The utility model is the innovation greatly to current two stroke engine, has overcome former engine combustion miscella and has had insoluble disadvantage and the big defective of piston wear, has good social benefit and economic benefit.

Claims

1, a kind of two stroke engine, comprise cylinder body (10), cylinder cap (7), piston (5) crankcase (17), bent axle (18), connecting rod (1), suction port (14), air outlet (6), spring valve (15), Carburetor (16), spark plug (8), it is characterized in that: between described piston (5) and crankcase (17), set up central diaphragm (4), oil duct (13) is set on described cylinder body (10).

2, two stroke engine as claimed in claim 1, it is characterized in that: on described piston (5), positioning device is set, this positioning device connects with connecting rod (1) by central diaphragm (4) and forms by being located at positioning rod (3) on piston (5) central axis, and cross plate (2) is set on the described positioning rod (3).

3, two stroke engine as claimed in claim 1 or 2 is characterized in that: described oil duct (13) is arranged on piston (5) back and forth on the cylinder body (10) within the stroke of operation.