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Engine air cylinder, two-stroke engine and control method for working circulation of two-stroke engine

A technology of an engine cylinder and a control method, which is applied in the direction of engine control, engine components, combustion engines, etc., can solve the problems of two-stroke engines such as low thermal efficiency, low ventilation quality, and short ventilation time, so as to reduce residual exhaust gas and improve Effect of scavenging efficiency and sufficient scavenging time

Inactive Publication Date: 2019-01-08
NINGBO GEELY ROYAL ENGINE COMPONENTS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an engine cylinder to solve the technical problems of low thermal efficiency, short ventilation time and low ventilation quality of the two-stroke engine in the prior art

Method used

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  • Engine air cylinder, two-stroke engine and control method for working circulation of two-stroke engine
  • Engine air cylinder, two-stroke engine and control method for working circulation of two-stroke engine
  • Engine air cylinder, two-stroke engine and control method for working circulation of two-stroke engine

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Experimental program
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Embodiment 1

[0058] See figure 1 , an engine cylinder, comprising a cylinder body 1, the cylinder body 1 is provided with an exhaust hole 3 and a scavenging hole 4 passing through its side wall, and the exhaust hole 3 and the scavenging hole 4 are arranged oppositely, wherein the exhaust hole 3 The highest point of the exhaust hole is higher than the highest point of the scavenging hole 4, and the lowest point of the exhaust hole 3 is higher than the lowest point of the scavenging hole 4.

[0059] It should be noted that the cylinder body is mainly composed of a cylinder head, a cylinder block and a crankcase. The cylinder body is also provided with an intake hole for the fuel or air mixture to enter, and the piston moves up and down in the cylinder body through the crankshaft in the crankcase. move.

[0060] The exhaust hole and the scavenging hole in the engine cylinder are asymmetrically arranged. Compared with the existing engine cylinder, when applied to a two-stroke engine, when the...

Embodiment 2

[0079] See Figure 4 , a method for controlling the working cycle of a two-stroke engine, using the above-mentioned two-stroke engine, comprising the following steps,

[0080] When the piston 2 moves upward from the bottom dead center in the cylinder body 1, the closing time of the scavenging hole 4 and the exhaust hole 3 is postponed;

[0081] When the piston 2 moves downward from the top dead center in the cylinder body 1, the opening time of the scavenging hole 4 and the exhaust hole 3 is delayed;

[0082] The operating conditions of the engine are judged, and the scavenging valve driving device 8 and the exhaust valve driving device 6 are individually controlled according to the judged engine operating conditions.

[0083] When the piston 2 moves downward from the top dead center in the cylinder body 1 and the top surface of the piston 2 moves from the highest point of the exhaust hole 3 to the lowest point of the exhaust hole 3, the exhaust valve drive device 6 drives th...

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Abstract

The invention relates to an engine air cylinder. The engine air cylinder comprises an air cylinder body, the air cylinder body is provided with an exhaust hole and a scavenging hole which penetrate through the side wall of the air cylinder body, moreover, the exhaust hole and the scavenging hole are oppositely arranged, the highest point of the exhaust hole is higher than the highest point of thescavenging hole, and the lowest point of the exhaust hole and the lowest point of the scavenging hole are arranged at the same height. Therefore, when the engine air cylinder is applied to a two-stroke engine, the heat efficiency of the two-stroke engine is improved, the ventilation quality is improved, and the ventilation effect is good. The invention further relates to the two-stroke engine. Therefore, the technical problems that in the prior art, the heat efficiency is low, the ventilation time is short and the ventilation quality is low are solved. The invention further relates to a control method for working circulation of the two-stroke engine. Therefore, the technical problems that in the prior art, the heat efficiency is low, the ventilation time is short and the ventilation quality is low are solved.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an engine cylinder, a two-stroke engine and a control method for a working cycle thereof. Background technique [0002] There are three types of air holes on the cylinder of the existing two-stroke engine, i.e. air intake hole, exhaust hole and scavenging hole, and these three types of holes are closed by the piston at a certain moment respectively. Exhaust holes on the existing engine cylinder have the same size as the scavenging holes, and are distributed symmetrically along the axis of the cylinder. The two-stroke engine using this kind of engine cylinder has low thermal efficiency, short ventilation time and low ventilation quality. [0003] And the existing two-stroke engine intake and exhaust overlap period (scavenging period) can account for 70% to 80% of the ventilation period, and the total duration of the ventilation process is much smaller than the four-stroke engine....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F1/22F02B25/00F02D13/02
CPCF02B25/00F02D13/0215F02F1/22Y02T10/12
Inventor 李双清韦虹胡轲李军王瑞平
Owner NINGBO GEELY ROYAL ENGINE COMPONENTS
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