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A scavenging system for a two-stroke engine

A scavenging system and engine technology, which is applied in the field of scavenging systems, can solve the problems of two-stroke internal combustion engine exhaust gas containing a large number of harmful components, etc., and achieve the effects of saving fuel consumption, improving fuel economy, and increasing efficiency

Active Publication Date: 2018-08-28
ZHEJIANG SAFUN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the disadvantages existing in the prior art that fresh air-fuel mixture gas is easily mixed with burned exhaust gas to be discharged out during the scavenging process, resulting in a large amount of harmful components in the tail gas of a two-stroke internal combustion engine, etc., and provides a new Scavenging system for two-stroke engines

Method used

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  • A scavenging system for a two-stroke engine
  • A scavenging system for a two-stroke engine

Examples

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Embodiment 1

[0019] like figure 1 , figure 2 As shown, a scavenging system of a two-stroke engine includes a cylinder 1 with a combustion working chamber 2, a crankcase 8 with a crank chamber 10, a piston 12, and a crankshaft assembly 5, and the cylinder 1 is in phase with the crankcase 8. connected, the cylinder 1 is respectively provided with a fresh air mixture intake port 11 and an exhaust port 4, the piston 12 is located at the bottom of the combustion working chamber 2, and the crankshaft assembly 5 is located in the crank chamber 10 and Connected with the piston 12, the crank chamber 10 is also provided with a rich mixture scavenging passage 9 and a lean mixture scavenging passage 6, and the rich mixture scavenging passage 9 has a first air inlet 91, The first air outlet 92, the lean mixture scavenging passage 6 has a second air inlet 61, the second air outlet 62, the rich mixture scavenging passage 9, and the lean mixture scavenging passage 6 are in an arc type and are closely a...

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PUM

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Abstract

The invention discloses a scavenging system of a two-stroke engine. The system comprises a cylinder provided with a combustion acting chamber, a crankshaft box provided with a crankshaft chamber, a piston and a crankshaft assembly, wherein a fresh mixed air inlet and an exhausting port are formed in the cylinder; a thick mixed air scavenging channel and a thin mixed air scavenging channel are arranged in the crankshaft chamber; the thick mixed air scavenging channel is provided with a first air inlet and a first air outlet; the thin mixed air scavenging channel is provided with a second air inlet and a second air outlet; the thick mixed air scavenging channel and the thin mixed air scavenging channel are arc-shaped and clung to the inner walls of two sides of the crankshaft chamber; a first scavenging port and a second scavenging port are formed in the combustion acting chamber; the first scavenging port is far away from the exhausting port and communicates with the first air outlet; the second scavenging port is close to the exhausting port and communicates with the second exhausting port; a first oil stopping rib and a second oil stopping rib are correspondingly arranged on the thick mixed air scavenging channel and the thin mixed air scavenging channel. According to the system, a layered scavenging state can be formed, so that the content of harmful components in exhaust gas can be reduced, and as a result, the environment can be protected; the consumption of oil in use can be saved.

Description

technical field [0001] The invention relates to a two-stroke engine, in particular to a scavenging system of the two-stroke engine. Background technique [0002] Two-stroke engines are usually used in portable power tools such as brush cutters and gasoline chain saws, which mainly include cylinders, pistons matched with cylinders, crankcases, and crankshaft assemblies supported on the crankcases by bearings, so that the piston top and The cylinder cavity forms a combustion working chamber, and the inside of the piston and the crankcase cavity form a crank chamber. Generally, an air inlet, an exhaust port, and a scavenging port are arranged on the cylinder, and these air ports are controlled to be opened or closed by the piston. One working cycle of the engine is completed by one revolution of the crankshaft, that is, two strokes of the piston up and down. [0003] During the upward stroke of the piston, the air-fuel mixture is sucked from the intake port into the crank cha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B25/20F02F7/00F02F1/22F01M13/04
CPCF01M13/04F02B25/20F02B2700/037F02F1/22F02F7/0036Y02T10/12
Inventor 芦翔王中奇黄理曾新华吴银秋赵雄聂鹏程杜小强许明刘飞陈成锦胡丽君
Owner ZHEJIANG SAFUN IND
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