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Exhaust scavenged engine

An engine and exhaust gas technology, used in combustion engines, machines/engines, internal combustion piston engines, etc., can solve the problems of wasting fuel, aggravating, and aggravating pollution, and achieve the effect of reducing the original exhaust value

Active Publication Date: 2015-10-21
ZHEJIANG PIONEER MACHINERY & ELECTRON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to keep as little exhaust gas as possible in the combustion chamber of the cylinder, there must be a part of the combustible mixture that is discharged from the exhaust port and wasted in vain without combustion.
At the same time, in the process of mixing with exhaust gas, a part of the mixed gas will decompose and produce toxic and harmful substances out of the machine due to the action of lack of oxygen and high-temperature exhaust gas, which will further aggravate and worsen the emission pollution.
At the same time, in order to minimize the gas exchange loss in the existing two-stroke gasoline engine, the scavenging port is designed to be lower than the exhaust port. However, when the piston moves upward, the scavenging port is closed first, and then the exhaust port is closed. During this period, that is, In the later stage of scavenging, part of the combustible gas in the combustion chamber of the cylinder is extruded out of the machine through the exhaust port, which not only wastes fuel, but also increases pollution

Method used

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Embodiment Construction

[0019] The invention discloses an exhaust gas scavenging engine, which realizes the exhaust gas to scavenge the engine, reduces the original discharge of the engine, and thereby controls the emission index of the engine.

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Apparently, the described examples are only some examples of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0021] Please see figure 1 and figure 2 as shown, figure 1 The main sectional view of the exhaust gas scavenged engine provided by the present invention, figure 2 Left sectional view of the exhaust gas scavenged engine provided fo...

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PUM

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Abstract

The invention provides an exhaust gas scavenging engine which comprises a cylinder body, a piston, an exhaust duct, a bent shaft cavity, a scavenging duct, a scavenging port and a crank case. An exhaust gas backflow duct communicated with the exhaust duct and the scavenging duct is arranged on the cylinder body, and a check valve opening from the exhaust gas backflow duct to the scavenging duct is arranged at the gas outlet end of the exhaust gas backflow duct. When the exhaust gas scavenging engine works, exhaust gas is discharged from a gas outlet, the exhaust gas passes through the exhaust gas backflow duct to open the check valve to enter the scavenging duct, the exhaust gas enters the scavenging duct to enable mixed oil gas to be pressed to the bent shaft cavity, and backflow exhaust gas on an upper layer in the scavenging duct firstly enters a combustor and rapidly pushes residual exhaust gas in the cylinder to enter the exhaust duct to be discharged from the gas outlet when the scavenging port is opened. The exhaust gas scavenging engine conducts scavenging on the engine by using the exhaust gas, reduces original discharging of the engine, and accordingly controls discharging indexes of the engine.

Description

technical field [0001] The invention relates to the technical field of engines, more specifically, to an exhaust gas scavenged engine. Background technique [0002] Since the invention of the internal combustion engine, it has greatly promoted the development of human society and the improvement of people's living standards. The two-stroke gasoline engine is widely used in motorcycles and other portable machinery because of its high power, stable operation, simple structure and many advantages such as manufacturing. [0003] Now we widely use the two-stroke gasoline engine, since the exhaust gas after combustion in the cylinder combustion chamber is purged and ventilated with the combustible mixture, the fresh combustible mixture is first sucked into the crankcase, and when the piston goes down, the inside of the crankcase The compressed combustible gas enters the combustion chamber of the cylinder through the scavenging port, and the fresh mixed gas has the function of squ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B27/00
CPCY02T10/146Y02T10/12
Inventor 杨慧明朱道庆刘晓庆
Owner ZHEJIANG PIONEER MACHINERY & ELECTRON
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