Scavenging boost structure of two-stroke engine

A technology of supercharging structure and engine, applied in the direction of engine components, combustion engines, machines/engines, etc., can solve the problems of increasing processing costs, inability to mold orifices, and limited reduction of harmful components.

Pending Publication Date: 2020-04-10
SHANDONG HUASHENG PESTICIDE APPL MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the fully open infinite flow hole structure, this kind of single-layer restricting hole structure can increase a certain airflow velocity of the mixed gas, and also promote the atomization effect of part of the fuel, improve the combustion efficiency, and can reduce the exhaust gas to a certain extent. harmful components in exhaust

Method used

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  • Scavenging boost structure of two-stroke engine
  • Scavenging boost structure of two-stroke engine
  • Scavenging boost structure of two-stroke engine

Examples

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Embodiment Construction

[0009] Such as figure 1 , figure 2 , image 3 As shown, a two-stroke engine scavenging supercharging structure includes a cylinder assembly and a crankcase assembly, and the cylinder assembly is composed of a cylinder body 1, a side cover one 2, and a side cover two 3. The cylinder body 1 cooperates with the side cover one 2 and the side cover two 3 to form a cylinder body scavenging channel 11, and the cylinder body scavenging channel 11 is designed with a scavenging flow limiting hole 4, and the scavenging gas limiting hole 4 includes a plurality of round holes, and can also be set into irregular shapes such as square holes and long holes as required.

[0010] The crankcase combination is made up of front half crankcase 5 and rear half crankcase 6. The front half crankcase 5 and the rear half crankcase 6 cooperate to form a crankcase scavenging passage 9, and a scavenging flow restriction hole 7 is designed in the crankcase scavenging passage 9, and the scavenging flow r...

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PUM

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Abstract

The invention provides a scavenging boost structure of a two-stroke engine. The scavenging boost structure comprises a cylinder body assembly and a crankcase assembly. According to the structure, a crankcase scavenging flow limiting hole is designed in a crankcase scavenging channel, a cylinder body scavenging flow limiting hole is designed in a cylinder body scavenging channel, and the effectivearea of the crankcase scavenging flow limiting hole is larger than that of the cylinder body scavenging flow limiting hole. When the engine works normally, mixed gas in the crankcase enters the cylinder body scavenging channel after being boosted by the crankcase scavenging flow limiting hole and then boosted again under the action of the cylinder body scavenging flow limiting hole, the two structures interact, the gas flow speed can be greatly increased, the scavenging efficiency in gas cylinders can be enhanced, the atomization effect on fuel can be promoted substantially, and the combustionefficiency can be improved, so that discharge of THC and NOx in tail gas is greatly reduced; and scavenging flow limiting holes, cylinder bodies and a crankcase body are set as an integrated structure, the scavenging flow limiting holes can be implemented by mold structures, processing procedures are not added, and the manufacturability and practicability are better.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a scavenging supercharging structure of a two-stroke engine. Background technique [0002] At present, the structure of low-emission two-stroke gasoline engines commonly seen in the market is divided into two types, one is the after-treatment structure, which adds a certain amount of catalyst in the muffler to make the exhaust gas undergo secondary combustion in the muffler to meet the requirements of reducing emissions. Due to cost constraints and safety temperature constraints on the side of the muffler, the catalyst content is often low, resulting in a high THC+NOx value, which is close to the emission limit; Influenced by factors such as gasoline engine power and mixed gas combustion, the original emission data of the traditional layered scavenging structure is usually difficult to meet the requirements of emission regulations. [0003] A cylinder block of a low-emission two...

Claims

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Application Information

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IPC IPC(8): F02B29/00F02F1/22F02F7/00
CPCF02B29/00F02F1/22F02F7/006F02F7/0065Y02T10/12
Inventor 李栋绪邢书彬朱凯凯王倩韦佳子刘计东王贵良徐志高高述祥王见张炎王利军刘虎姜育张茂磊
Owner SHANDONG HUASHENG PESTICIDE APPL MACHINERY CO LTD
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