Direct-current layered scavenging two-stroke engine

Abstract

The invention relates to a direct-current layered scavenging two-stroke engine. The direct-current layered scavenging two-stroke engine comprises an air cylinder body, a crankcase, a piston, a crankshaft flywheel set, an exhaust port, a main air inlet reed valve, a piston pin, sparking plugs, a main scavenging channel pipe, a main scavenging channel port, scavenging ports, an auxiliary scavengingchannel pipe, an auxiliary air inlet reed valve and an air storage spiral coil, wherein the main scavenging channel pipe is arranged at the top of the piston, the upper port is located in the auxiliary scavenging channel pipe, the lower end of the main scavenging channel pipe penetrates through the top of the piston and communicates with fuel gas in the crankcase, the auxiliary scavenging channelpipe is located on an air cylinder cover and penetrates through the air cylinder cover to enter a combustion chamber, the plurality of scavenging ports are uniformly distributed in the part, enteringthe combustion chamber, of the auxiliary scavenging channel pipe, and fuel mixed gas which is sucked by the main air inlet reed valve and fuel mixed gas which is sucked by the auxiliary air inlet reedvalve are mixed with air in the internal space of the piston to form an air layer, a fuel mixed gas diluting layer and a fuel mixed gas layer. According to the direct-current layered scavenging two-stroke engine, direct-current scavenging and layered scavenging are combined, so that the scavenging efficiency of the two-stroke engine is further improved.

Description

technical field [0001] The invention relates to a direct-flow stratified scavenging two-stroke engine, which is suitable for the technical field of internal combustion engines. Background technique [0002] The characteristic of two-stroke engine DC scavenging is that the exhaust valve is set on the cylinder head to replace the exhaust hole, so that the scavenging air flow moves along the axis of the cylinder, which greatly improves the quality of ventilation. The scavenging holes are arranged along the tangent, so that the fresh charge entering the cylinder rotates at high speed to form an "air cushion piston", which not only avoids excessive mixing of the fresh charge and exhaust gas, but also accelerates the exhaust gas upward, further improving the quality of ventilation. DC scavenging has many advantages, but due to the addition of an exhaust valve mechanism, the ventilation system is complicated and the height of the engine is increased, so it is mainly used in low-spe...

AI Technical Summary

Problems solved by technology

There are many advantages of DC scavenging, but due to the addition of an exhaust valve mechanism, the ventilation system is complicated and the height of the engine is increased, so it is mainly used in low-speed and high-power two-stroke diesel engines

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