CN218624427U

CN218624427U - Cylinder block inner wall channel structure and engine

Info

Publication number: CN218624427U
Application number: CN202222946101.0U
Authority: CN
Inventors: 宋秋柳; 储让
Original assignee: Aoding Shanghai Fire Equipment Co ltd
Current assignee: Aoding Shanghai Fire Equipment Co ltd
Priority date: 2022-11-04
Filing date: 2022-11-04
Publication date: 2023-03-14
Anticipated expiration: 2032-11-04

Abstract

The inner wall of the cylinder body is provided with an invaginated channel which corresponds to the position of a piston ring at the exhaust side when a piston descends; when the piston moves upwards, fresh mixed gas from the gas inlet is stored in the channel; when the piston descends, the fresh mixed gas in the groove channel cools the piston ring. The utility model discloses an establish the channel at the inner wall of cylinder block, the lower fresh mixed gas of storage temperature in advance treats that the piston carries out the heat exchange with the piston ring of its lateral wall when going down, plays the cooling piston ring, reduces the piston ring carbon deposit, has prolonged the life of engine.

Description

Cylinder block inner wall channel structure and engine

Technical Field

The utility model belongs to the technical field of two-stroke engine machinery and specifically relates to a cylinder block inner wall channel structure and engine.

Background

The existing two-stroke engine piston is cooled by the mixed cooling of the internal engine oil and gasoline and the heat conduction of a piston ring and a cylinder body. With the increasing of the rotating speed and the increasing of the compression ratio of the engine, the heat at the exhaust side piston ring cannot be effectively released, so that the temperature at the first air ring on the piston is higher, and serious carbon deposition is generated. After long-time operation, carbon deposition at the first air ring is increased, so that a piston ring is jammed, the power of an engine is reduced, the service life is shortened, and the maintenance cost is increased.

Disclosure of Invention

The utility model discloses a solve current problem, aim at providing a cylinder block inner wall channel structure and engine. In order to achieve the purpose, the utility model adopts the technical scheme that the piston reciprocates in the cylinder body, and the exhaust port is positioned above the cylinder body. The inner wall of the cylinder body is provided with an invaginated channel, and the channel corresponds to the position of a piston ring at the exhaust side when the piston moves downwards; when the piston moves upwards, fresh mixed gas (mixed gas of fresh gasoline and engine oil) from the air inlet is stored in the channel; when the piston descends, the fresh mixed gas in the groove channel cools the piston ring.

The channel is arranged below the exhaust port, and the upper edge of the channel and the lower edge of the exhaust port are arranged to be separated; independent of each other and not communicated.

Wherein, the channel extends along the direction of reciprocating motion of the piston.

Wherein, the channel is two, separates between the two.

Wherein, the width of the channel is less than the width of the exhaust port, and the channel does not influence the direction and the support of the piston skirt. The depth of the channel is smaller than the thickness of the side wall of the cylinder body, and the requirement for structural strength of the inner wall of the cylinder body is met. The utility model also provides an engine, for two-stroke engine, be equipped with arbitrary foretell cylinder block inner wall channel structure.

Compared with the prior art, the utility model discloses an establish the channel at the inner wall of cylinder block, the lower fresh gas mixture of storage temperature in advance treats that the piston carries out the heat exchange rather than the piston ring of lateral wall when going down, plays the cooling piston ring, reduces the piston ring carbon deposit, has prolonged the life of engine.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a longitudinal section of an embodiment of the invention;

FIG. 3 is a cross-sectional view of an embodiment of the present invention;

fig. 4 is a schematic view of the piston according to the embodiment of the present invention when moving upward;

FIG. 5 is a schematic view of a piston of an embodiment of the present invention moving downward and cooling;

referring to the drawings, channel 1, exhaust port 2, piston 3, cylinder block 4.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings.

Referring to fig. 1 to 5, fig. 1 to 5 show that the present invention provides an embodiment of the present invention, which aims at solving the problems of high temperature at the exhaust side of the piston of the present two-stroke engine, more carbon deposition on the piston ring and the blockage of the piston ring, and provides a channel structure on the inner wall of the cylinder block: the inner wall of the cylinder body is provided with an invaginated channel, and the channel corresponds to the position of a piston ring at the exhaust side when the piston descends. The processing of the chute is finished before honing the inner wall of the cylinder block, and after the processing of the chute is finished, the chamfering treatment is further required at the intersection line of the chute and the cylinder block, referring to fig. 2, the chute is arranged below the exhaust port, and the upper edge of the chute is separated from the lower edge of the exhaust port, that is, the lower edge of the exhaust port is not communicated with the upper edge of the chute, so as to meet the sealing requirement of the bottom casing.

Referring to fig. 1, the two channels extend in the reciprocating direction of the piston, and the two channels are spaced apart from each other, namely, the middle partition land, so that the piston can be guided and supported during operation.

Further, the overall width of the two channels should not be greater than the width of the exhaust port, so as to satisfy the functions of piston scavenging sealing and piston skirt supporting and guiding. The depth of the channel is smaller than the thickness of the side wall of the cylinder body, so that the requirement on the structural strength of the inner wall of the cylinder body is met.

Referring to fig. 4, as the piston travels upward, the channels of the cylinder block are exposed to the case. The negative pressure in the casing will replenish the fresh mixed gas (the mixed gas of fresh gasoline and engine oil) in the air inlet into the cylinder channel and store the fresh mixed gas. Referring to fig. 5, when the piston descends, the piston and the side wall of the cylinder body are overlapped, and the fresh mixed gas in the channel is in contact with the exhaust side of the piston and exchanges heat with the exhaust side of the piston. The fresh mixture cools the exhaust sidewall of the piston, reducing the temperature at the piston ring.

The utility model discloses on the basis of aforementioned embodiment, still provide a two-stroke engine, be equipped with arbitrary foretell cylinder block inner wall channel structure, have the same technological effect.

The embodiments of the present invention have been described in conjunction with the accompanying drawings and examples, the structures of which are not intended to limit the present invention, and those skilled in the art can make modifications as required, and all changes and modifications within the scope of the appended claims are within the scope of protection.

Claims

1. The utility model provides a cylinder block inner wall channel structure, piston make reciprocating motion in the cylinder block, the gas vent is located the top of cylinder block, its characterized in that: the inner wall of the cylinder body is provided with an invaginated channel, and the channel corresponds to the position of a piston ring at the exhaust side when the piston moves downwards;

when the piston moves upwards, fresh mixed gas from the gas inlet is stored in the channel; when the piston descends, the fresh mixed gas in the channel cools the piston ring.

2. The cylinder block inner wall channel structure according to claim 1, wherein: the channel is arranged below the exhaust port, and the upper edge of the channel and the lower edge of the exhaust port are arranged to be separated.

3. The cylinder block inner wall channel structure according to claim 1 or 2, wherein: the channel extends along the reciprocating motion direction of the piston.

4. The cylinder block inner wall channel structure according to claim 3, wherein: the two channels are separated.

5. The cylinder block inner wall channel structure according to claim 1, wherein: the width of the channel is less than the width of the exhaust port.

6. The cylinder block inner wall channel structure according to claim 1, wherein: the depth of the channel is less than the thickness of the side wall of the cylinder body.

7. An engine, being a two-stroke engine, characterized in that: there is provided a cylinder block inner wall channel structure as claimed in any one of claims 1 to 6.