WO2016145920A1

WO2016145920A1 - Device for utilizing residual gases of lubricating system of engine

Info

Publication number: WO2016145920A1
Application number: PCT/CN2015/098659
Authority: WO
Inventors: 李志军; 余剑
Original assignee: 浙江亚特电器有限公司
Priority date: 2015-03-17
Filing date: 2015-12-24
Publication date: 2016-09-22
Also published as: CN104791048A

Abstract

A device for utilizing residual gases of a lubricating system of an engine. The engine comprises a cylinder (4), a carburetor (3), and an air intake duct (2) between the carburetor (3) and the cylinder (4). The residual gases of the lubricating system of the engine are introduced into the air intake duct (2) via a ventilation pipe (1), and the exhausted residual gases are introduced to the cylinder for combustion via the air intake duct (2). The device directly introduces the residual gases of the lubricating system of the engine to the cylinder for combustion, avoiding waste and pollution.

Description

Engine lubrication system residual gas utilization device

Technical field

The invention relates to a residual gas utilization technology for a lubrication system of a small universal four-stroke gasoline engine.

Background technique

Up to now, the residual gas in the vent pipe of the small gasoline four-stroke engine lubrication system at home and abroad is mostly connected to the air filter. After simple or slightly complicated oil and gas separation, the light gas enters the carburetor to participate in combustion, and the heavy oil is immersed in the air. The filter is filtered into the sponge or sucked back into the oil tank through a return line provided with a check valve.

The lubrication system of this type of machine is subject to structural constraints and can only be used in limited stations and cannot be flipped at will. In practice, small gasoline four-stroke engines are mostly used for hand-held lawn mowers, brush cutters, manually operated lawn mowers, pumps that can be moved at any time, small rotary tillers, etc., and the operation will always be tilted for various reasons. Down, it is easy to cause the oil to be ejected from the vent pipe. The air filter is polluted without exception. It flows to the outside of the machine first and then, wastes oil, pollutes the machine and the environment. In severe cases, the machine cannot continue to work normally.

How to effectively control the oil injection of small gasoline four-stroke engine and reasonably solve the loss and utilization of the residual gas in the lubrication system discharged by the vent pipe is one of the important technical issues in the industry and has universal significance.

Summary of the invention

The technical problem to be solved by the present invention is to provide a residual gas utilization device for an engine lubrication system, which effectively controls the total amount of residual gas and the heavy component oil content of the lubrication system discharged from the snorkel.

In order to solve the above technical problem, the present invention adopts the following technical solution: an engine lubricating system residual gas utilization device, the engine is provided with a cylinder and a carburetor, and an intake pipe is arranged between the carburetor and the cylinder, and the engine is lubricated. The residual gas of the system is taken out through a vent pipe, and the vent pipe is connected to the intake pipe, and the residual air of the engine lubrication system led out by the vent pipe enters the cylinder combustion through the intake pipe.

Preferably, a one-way valve and a restrictor are provided between the vent pipe and the intake pipe.

Preferably, a transparent viewing port for observing the flow of residual gas is provided between the vent pipe and the intake duct.

The technical scheme adopted by the invention connects the vent pipe to the intake pipe between the carburetor and the cylinder, and a little constant flow lubrication system directly enters the cylinder to burn away, thereby avoiding waste and pollution.

DRAWINGS

The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

Figure 1 is a schematic view of the structure of the engine.

detailed description

As shown in FIG. 1, the engine is provided with a cylinder 4 and a carburetor 3, and an intake duct 2 is provided between the carburetor and the cylinder, and the residual gas of the engine lubrication system is taken out through the vent pipe 1, the vent pipe The air intake pipe is connected, and the residual air of the engine lubrication system led out by the air pipe enters the cylinder through the intake pipe to burn.

A check valve and a throttle are arranged between the vent pipe and the intake pipe to allow the residual gas to enter the cylinder in an orderly manner. At the same time, a transparent observation port for observing the residual gas flow condition is provided between the snorkel and the intake pipe to facilitate monitoring of the residual gas flow.

The engine lubrication system comprises a lubricating oil tank, wherein the lubricating oil tank is provided with more than one blowing suction hole on the tank wall adjacent to the crankcase, and communicates with the crank chamber inner cavity, which uses the pulse air flow generated by the up and down movement of the piston to blow and absorb lubrication. The lubricating oil in the fuel tank sequentially blows the generated small oil particles to the parts to be lubricated.

Among them, the position of the blowing suction hole and the oil setting in the lubricating oil tank make the lubricating oil flow into the crankcase from the lubricating oil tank when the engine is arbitrarily turned over. Specifically, in the embodiment, the lubricating oil tank has a U shape surrounding the bottom surface of the crankcase and two sides of the width. The blowing suction holes are provided in three, respectively located at the center of the bottom of the lubricating oil tank and at the center of the two side walls of the width, and the amount of oil in the lubricating oil tank is located at the center of the lubricating oil tank when the engine is in a horizontal state. 50mm above the oil level Within the height. Regardless of how the engine is turned over, the lubricant does not flow directly from the oil tank into the crankcase due to the rationality of the position of the suction port and the proper amount of oil in the oil tank. The ratio of the sum of the mouth areas of the blow holes to the cross-sectional area of the cylinder is less than one.

The up and down movement of the piston causes the pulsed airflow generated in the crankcase to blow through the suction hole, sucking the lubricating oil in the lubricating oil tank, causing the lubricating oil to sway, and a small amount of oil droplets are splashed into the crankcase from the blowing suction hole, and the crank is rotated at a high speed. Bringing slamming into small oil particles, these small oil particles are blown down from the crankcase through the crankshaft bearings to the cam chamber - the ejector hole - the valve rocker chamber - the cylinder head cover - the oil and gas separation chamber - A snorkel in which small oil particles lubricate and cool the passing parts. At the same time, the crankshaft connecting rod and the cylinder wall and the piston are lubricated. The setting of the suction suction hole and the use of the piston up and down movement to lubricate the lubricating oil generated in the crankcase are the core; the remaining parts involved in lubrication, the crankshaft bearing, the cam chamber, the jack hole, the valve rocker arm chamber, the cylinder head cover The oil and gas separation chamber and the vent pipe are indispensable mechanical components of all four-stroke engines. The present invention utilizes its own positional arrangement and existing structure to lubricate or participate in lubrication.

Since the pulsed airflow generated by the up and down movement of the piston is blown and sucked at a high frequency of 0.01-0.002 seconds, the small oil particles will not travel very far at a time, and will first adhere to the wall and parts of the chamber near the vicinity, and the small oil particles are not It will go very far at a time. It will first adhere to the wall and parts of the chamber that is closer to form an oil film, and then gradually blow it to each part that needs lubrication and cooling with each downward air flow. The oil film travels at a very slow speed by monitoring with a transparent tube.

During the process of the downward pressure airflow blowing the lubricating oil film forward, the pulse airflow generated by the up and down movement of the piston is blown and sucked at a high frequency, and the vent pipe having a small cross section is larger than the frictional force, so that the absolute value of the positive pressure in the machine is absolute. It is always greater than the absolute value of the negative pressure. Therefore, although the lubricant film stops and stops, the general trend is to slowly climb toward the exit. The oil film travels at a speed of 2-5 mm/s by monitoring with a transparent tube.

In the process of lubricating the oil film, the viscosity of the lubricating oil that has played an effective role will decrease, which is lower than the viscosity of the lubricating oil that has not been used. The former is blown by the airflow faster than the latter, and finally Only a very small amount of the gas discharged into the air from the vent pipe functions as an emulsion-like lubricating oil.

According to the pulse oil-gas lubricating method of the invention, the lubricating oil is one-way traveling lubrication, and the lubricating oil that plays the role is no longer returned to the lubricating oil tank, which is beneficial to maintaining the quality and lubricating performance of the lubricating oil which has not played the role.

By controlling the position and size of the suction holes on the adjacent tank wall of the lubricating oil tank and the crankcase, the pulse gas flow pressure and the amount of oil particles can be controlled, and the pressure of the exhaust gas of the vent pipe and the discharge of the emulsion lubricating oil are controlled. The speed, so as to ensure that under the premise of sufficient lubrication, the lubricating oil that has not fully exerted its effect will not be discharged out of the machine, thereby achieving the purpose of reducing the consumption of lubricating oil and reducing pollution.

Claims

An engine lubricating system residual gas utilization device is provided with a cylinder and a carburetor, and an intake duct is arranged between the carburetor and the cylinder, wherein the residual gas of the engine lubrication system is led out through the vent pipe. The vent pipe is connected to the intake pipe, and the residual gas of the engine lubrication system led out by the vent pipe enters the cylinder combustion through the intake pipe.
The engine lubricating system residual gas utilization device according to claim 1, wherein a check valve and a throttle are provided between the vent pipe and the intake pipe.
The engine lubricating system residual gas utilization device according to claim 1, wherein a transparent observation port for observing a residual gas flow condition is provided between the vent pipe and the intake pipe.