Active two-stroke engine crankcase ventilation system

A crankcase ventilation and engine technology, which is applied to crankcase ventilation, engine components, machines/engines, etc., can solve the problems that the engine crankcase does not meet the requirements of regulations, and achieve the effect of slowing down oxidation and deterioration and improving utilization

Inactive Publication Date: 2021-06-04
北京盛瑞科智能科技合伙企业(有限合伙)
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above problems, the present invention provides an active two-stroke engine crankcase ventilation system, which solves the prob

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Active two-stroke engine crankcase ventilation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In cold weather, the temperature inside the crankcase 6 is low, and water vapor condensation is likely to cause oil emulsification, but the use of the suction pump 9 can quickly pump out the mixed steam in the crankcase 6 to reduce the concentration, thereby reducing water vapor condensation and preventing oil emulsification and icing in the flex tube.

Embodiment 2

[0028] Part of the unburned mixture leaked through the piston ring in the crankcase 6 re-enters the intake port through the suction of the suction pump 9, and then enters the combustion chamber 5 for combustion, which can further improve the efficiency of the engine.

Embodiment 3

[0030] By controlling the suction pump 9 to create a negative pressure source, the mixture in the crankcase 6 is sucked into the intake passage, so that the pressure in the crankcase 6 is always controlled at a negative pressure state of -6~+3kPa, which meets the regulations requirements.

[0031] This technology solves the risk problem that the crankcase ventilation system of a DC scavenging two-stroke engine does not meet the requirements of emission regulations, and at the same time can accelerate the ventilation effect of crankcase pollutants and fresh air, and slow down the oxidation and deterioration of engine oil;

[0032] The present invention can utilize the pumping effect of the air pump 9, which is equivalent to forming a negative pressure source outside, and the mixed gas in the crankcase 6 re-enters the air inlet after oil-gas separation and then enters the combustion chamber 5 for combustion, thereby improving the crankcase 6. At the same time, after the mixed ga...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides an active two-stroke engine crankcase ventilation system. The system is characterized in that an air filter, a supercharger, an air inlet intercooler and an air inlet manifold are connected through the air inlet manifold; the air inlet manifold is communicated with a combustion chamber through an air channel; the air channel is provided with a crankcase; the combustion chamber is communicated with the crankcase; waste gas leaked from the combustion chamber enters the crankcase; a pressure sensor and an oil-gas separator are both arranged on the crankcase; the pressure sensor is connected to an engine control unit through a wire; an air extracting pump is connected to the engine control unit through a wire; the crankcase, the oil-gas separator and the air extracting pump are sequentially connected to an air inlet of the supercharger through a bent through pipeline; the other end of the crankcase is directly connected to an air outlet of the air filter through a bent through pipe; an oil pan is arranged at the lower end of the crankcase; the oil-gas separator is connected to the oil pan and separates engine oil from the oil pan; and the problem that most of the uniflow scavenging two-stroke engine crankcase is in a positive pressure state and cannot meet the requirements of laws and regulations is solved.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an active two-stroke engine crankcase ventilation system. Background technique [0002] At present, the lubrication system of the two-stroke engine is spray lubrication, which directly sprays the engine oil into the cylinder and mixes it with gasoline for combustion. Therefore, his crankcase ventilation system mainly sweeps the piston leakage air through the crankcase and re-enters the cylinder for combustion. The main disadvantage of this form is that the engine oil is directly injected into the cylinder for combustion, resulting in poor emissions and fuel consumption. [0003] The lubrication system of the two-stroke engine adopts the traditional four-stroke engine scavenging system. The common four-stroke crankcase ventilation system is passive circulation, and in the application of the engine MAP working condition is the intake booster mode, the only negative pressure when th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F01M13/02F01M13/04F02M35/02F02M35/10F02M35/104
CPCF01M13/021F01M13/04F02M35/02F02M35/10F02M35/104F01M2013/026
Inventor 张伟陈明
Owner 北京盛瑞科智能科技合伙企业(有限合伙)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap