JP3134707U - 4-stroke engine lubrication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a four-stroke engine lubrication device capable of maintaining a lubrication function at the same time without causing a large amount of engine oil to enter a combustion chamber even if the engine is installed at an inclination and in the reverse direction and causing the engine to extinguish. .
When a piston descends and positive pressure is generated in a crankcase, engine oil and waste air in the crankcase are pressed into a gear box, thereby generating positive pressure in the gear box, and engine oil and waste air are cranked. Press fit into the case and swingarm chamber. Waste air that has entered the crankcase creates a positive pressure, thus introducing the waste air into a gas oil filter to separate the gas and oil. The separated gas is introduced into the cylinder and burns, and the separated engine oil is sucked into the crankcase when negative pressure is generated in the crankcase in the next stroke, thus completing the lubrication and circulation of the engine oil to the engine. .
[Selection] Figure 1

Description

  The present invention relates to a kind of four-stroke engine lubrication device.

  The current small two-stroke and four-stroke device general-purpose engines are widely applied to horticulture, agricultural equipment, and industrial applications such as mowers, chainsaws, tractors, generators, handbags, and back sprayers. However, pollution emission regulations are becoming stricter every day, and the two-stroke general-purpose engine has a big problem. For this reason, the 4-stroke engine will become one of the mainstream of general-purpose engines in the future. However, the lubrication condition of the 4-stroke engine is limited, and even if there is a slight inclination angle, it can not operate and function normally. Must. At present, Honda is the most advanced in terms of this technology, and has already been mass-produced. It is the most difficult part to maintain the lubrication function under the condition that the 4-stroke engine is normally used at each angle of 360 degrees. The conventional four-stroke small engine forcibly lubricates the oil supply parts with an engine oil pump (all the four-stroke engines of general automobiles and motorcycles are lubricated in this manner). Another method of general-purpose engines is a method of lubricating parts by spraying an oil engine. However, this type of system has a limitation on the tilt angle during use.

  The main purpose of the present invention is to maintain normal use and normal lubrication function at any inclination angle, and to enhance the competitiveness of the product.

  Another object of the present invention is to design at low cost, maintain the lubrication system function without adding high cost parts.

In the present invention, when the piston of the engine rises and negative pressure is generated in the crankcase, the crankcase extracts engine oil from the oil box, swing arm chamber, and gas oil filter, and the oil enters the crankcase. When the piston descends and positive pressure is generated in the crankcase, engine oil and waste air in the crankcase are pressed into the gearbox, which creates positive pressure in the gearbox, and engine oil and waste air are in the crankcase and swing arm. Press fit into the chamber. Waste air that has entered the crankcase creates a positive pressure, thus introducing the waste air into a gas oil filter to separate the gas and oil. The separated gas is introduced into the cylinder and burns, and the separated engine oil is sucked into the crankcase when negative pressure is generated in the crankcase in the next stroke, thus completing the lubrication and circulation of the engine oil to the engine. .
Even if the engine is installed upside down, the engine oil stays in the oil box, so a large amount of engine oil enters the combustion chamber and does not cause the engine to extinguish, and at the same time maintains the lubrication function. be able to.

The problem to be solved by the present invention is that the oil box and the crankcase communicate with each other through an oil absorption passage, and a first unidirectional valve is installed in the oil absorption passage.
The crankcase and the gearbox communicate with each other through a first oil transport passage,
The gear box and the swing arm chamber communicate with each other through a second oil transport passage, and the gear box and the oil box communicate with each other through a third oil transport passage.
The swing arm chamber and the crankcase communicate with each other through a first oil circulation passage, and a second unidirectional valve is installed in the first oil circulation passage.
The gas oil filter and the oil box communicate with each other through a second oil circulation passage, and a third unidirectional valve is installed in the second oil circulation passage, and the gas oil filter and the crankcase are connected to each other. The gas oil filter and the cylinder communicate with each other through an air passage,
When the piston moves upward in the cylinder and creates a negative pressure in the crankcase, the first unidirectional valve, the second unidirectional valve, and the third unidirectional valve are opened, thereby the oil box, Engine oil in the swing arm chamber and in the gas oil filter is sucked into the crankcase,
When the piston motion descends and creates a positive pressure in the crankcase, engine oil and waste air in the crankcase are pressed together into the gearbox, creating a positive pressure in the gearbox, thus Engine oil and waste air in the gear box are press-fitted into the oil box and the swing arm chamber, and the engine oil that has entered the swing arm chamber provides a lubricating effect to the mechanical parts inside the engine and enters the oil box. The waste air generates a positive pressure in the oil box, the waste air is introduced into the gas oil filter, the gas and oil are separated, the separated gas is sent into the cylinder, and the separated engine The oil returns to the crankcase, thus providing a four-stroke engine lubrication device that completes the lubrication and circulation of the engine oil to the engine. .

The first unidirectional valve of the present invention is composed of a valve nozzle, a sphere, and a spring.
The valve nozzle is installed in the oil absorption passage, the spring acts on the sphere, and the sphere maintains a blockage to the valve nozzle and shields the oil absorption passage in a state where no external force is applied. If the engine oil is prevented from flowing back into the oil box and the crankcase creates a negative pressure and overcomes the elasticity of the spring, the sphere will release the blockage to the valve nozzle and the engine oil will When a positive pressure is generated in the crankcase after passing through the one-way valve, the sphere shields the valve nozzle by the elasticity of the spring,
The second one-way valve and the third one-way valve of the present invention are made of rubber material, and when the rubber one-way valve is not subjected to the action of external force, it uses its own elasticity to seal the valve port. When the pressure is applied, the valve mouth is closed,
In the present invention, a gas transport passage connected to the advancing passage is installed in the crankcase, and a pin is installed in the gas transport passage. When the engine is installed in reverse, the pin is Block the transport passage, prevent oil gas from being transported to the gas oil filter,
The present invention allows the engine oil to circulate inside the engine by the change in the internal pressure of the unidirectional valve structure and the crankcase, and provides a lubricating effect to the machine parts inside the engine. Furthermore, even if installed reversely, a four-stroke engine lubrication device is provided that prevents engine oil from entering the combustion chamber of the engine and causes the engine to extinguish, and at the same time maintains the lubrication function.

  In the present invention, when the piston motion generates a positive pressure in the crankcase, the engine oil and waste air in the crankcase are pressed together in the gearbox, creating a positive pressure in the gearbox, thus the engine oil in the gearbox. And the waste air press-fit into the oil box and swing arm chamber, the waste air that entered the oil box creates a positive pressure in the oil box, the waste air is introduced into the gas oil filter, and the gas and oil are separated and separated The later gas is fed into the cylinder, and the separated engine oil returns to the crankcase, thus completing the lubrication and circulation of the engine oil to the engine.

As shown in FIGS. 1 and 2, the optimum embodiment of the four-stroke engine lubricating device provided by the present invention includes an oil box 1, a crankcase 2, a gear box 3, a swing arm chamber 4, and a gas oil filter 7.
The oil box 1 is filled with engine oil, and a crank 6 for connecting a weight 61 is installed in the crankcase 2. The crank 6 is connected to a piston 62 installed in the cylinder 5, and a flywheel and a gear set installed in the gear box 3 are installed at both ends of the crank 6.

The oil box 1 and the crankcase 2 communicate with each other through an oil absorption passage 21, and a first unidirectional valve 211 is installed in the oil absorption passage 21. As shown in FIG. 6, the optimal embodiment of the first unidirectional valve 211 includes a valve nozzle 2111, a sphere 2112, and a spring 2113.
The valve nozzle 2111 is installed in the oil absorption passage 21, and the spring 2113 acts on the sphere 2112, and the sphere 2112 blocks the valve nozzle 2111 and shields the oil absorption passage 21 in a state where no external force is received. . Thus, when the engine oil in the crankcase 2 does not flow around the oil box 1 and the crankcase 2 generates a negative pressure and overcomes the elasticity of the spring 2113, the sphere 2112 closes the valve nozzle 2111. The engine oil in the oil box 1 flows into the crankcase 2.

The crankcase 2 and the gear box 3 communicate with each other through a first oil transport passage 22. The gear box 3 and the swing arm chamber 4 communicate with each other through a second oil transport passage 41, and the gear box 3 and the oil box 1 communicate with each other through a third oil transport passage.
The swing arm chamber 4 and the crankcase 2 are connected by a first oil circulation passage 42, and a second unidirectional valve 421 is installed in the first oil circulation passage 42. In the embodiment of the present invention, the second unidirectional valve 421 is a unidirectional valve made of a rubber material. When the rubber unidirectional valve is not subjected to the action of external force, the valve mouth is sealed using its own elasticity. When opening the valve, open the valve port.

The gas oil filter 7 and the oil box 1 are communicated by a second oil circulation passage 71, and a third unidirectional valve 711 is installed in the second oil circulation passage 71. In an embodiment of the present invention, the third unidirectional valve 711 is a rubber unidirectional valve similar to the second unidirectional valve 421. The gas oil filter 7 and the crankcase 2 communicate with each other through an air advance passage 72. The gas oil filter 7 and the cylinder 5 communicate with each other through an air passage 73.
An embodiment of the crankcase 2 of the present invention is composed of a first main body 2A (see FIGS. 4 and 5) and a second main body 2B (see FIGS. 6 and 7), and the first main body 2A includes the crank 6 and a weight. A crank chamber 20 is provided, and a first oil transport passage 22 communicating with the gear box from the crank chamber 20 is installed on the side of the first main body 2A (the arrow in FIG. 5 indicates that engine oil is removed from the crank chamber. Shows the route to the gearbox). The second body 2B is a component corresponding to and combined with the first body 2A, which installs an oil absorption passage 21 and a gas transport passage 23. A pin 24 is installed in the gas transport passage 23, and one end of the pin 24 is provided with a conical portion whose outer diameter is larger than the outlet of the gas transport passage 23. The gas transport passage 23 is connected to the air advance passage 72.

1 and 2 show the operation method of the engine lubrication device of the present invention. The solid arrow in the figure indicates the flow route of engine oil, the dotted line indicates the flow route of engine oil mixed with waste air, and the hollow arrow indicates the flow route of gas.
When the piston 62 of the engine performs an ascending motion in the cylinder 5 and a negative pressure is generated in the crankcase 2, the first unidirectional valve 211, the second unidirectional valve 421, and the third unidirectional valve 711 are As a result, the engine oil in the oil box 1 is sucked into the crankcase 2 via the oil absorption passage 21. Engine oil in the swing arm chamber 4 is sucked into the crankcase 2 from the first oil circulation passage 42. Engine oil in the gas oil filter 7 is also drawn into the crankcase 2 via the second oil circulation passage 71 at the same time.

When the piston 62 performs a descending motion and the crankcase 2 generates a positive pressure, the positive pressure causes the engine oil and waste air in the crankcase 2 to pass through the first oil transport passage 22 and together with the Press-fit the gear box 3. At this time, a positive pressure is generated in the gear box 3, and thus engine oil and waste air in the gear box 3 pass through the second oil transport passage 41 and press-fit into the swing arm chamber 4, and the first Three passes through the oil transport passage 31 and press-fits into the oil box 1. The waste air that has entered the oil box 1 generates a positive pressure in the oil box 1, passes through the air advance passage 72, is introduced into the gas oil filter 7, and gas and oil are separated. The separated gas passes through the outflow passage 73 and is fed into the cylinder 5 where it is mixed with fuel and burned to drive the reciprocating movement. When the separated engine oil moves on the piston, it returns to the crankcase 2 from the second oil circulation passage 71 again, thus completing the lubrication and circulation of the engine oil to the engine.
According to the present invention, engine oil can be provided for lubricating machine parts inside the engine without using an engine oil pump, and the engine of the present invention is inclined as shown in FIG. Furthermore, when installed in reverse, the pin 24 installed in the gas transport passage 23 moves downward due to its own weight and closes the outlet of the gas transport passage 23. Thus, it is possible to prevent the oil gas and the engine oil from being transported to the gas oil filter 7 and enter the combustion chamber of the cylinder 5 to cause the engine to extinguish, and at the same time maintain the lubricating function.

FIG. 8 shows an engine oil flow path of the engine lubrication apparatus according to the embodiment of the present invention. The solid line arrows in the figure indicate the flow direction of engine oil, and the hollow arrows indicate the flow direction of waste air.
In the figure, when the piston ascends in the cylinder and generates a negative pressure in the crankcase 2, the engine oil in the oil box 1, the swing arm chamber 4, and the gas oil filter 7 is sucked into the crankcase 2 at the same time. Indicates that
When the piston performs a descending motion, the crankcase 2 generates a positive pressure, and the positive pressure causes the engine oil and waste air in the crankcase 2 to press-fit the gear box 3 together. At this time, a positive pressure is generated in the gear box 3, and thus engine oil and waste air in the gear box 3 simultaneously press-fit the swing arm chamber 4 and the oil box 1 and enter the oil box 1. The exhausted air generates a positive pressure and is introduced into the gas oil filter 7 to be separated into oil and gas. The separated gas is introduced into the cylinder 5, mixed with fuel and burned. When the separated engine oil moves on the piston, it returns to the crankcase 2 again, thus completing the lubrication and circulation of the engine oil to the engine.

It is a front plane sectional view of the engine lubrication device of the present invention. It is a side plane sectional view of the engine lubricating device of the present invention. FIG. 3 is a schematic view of a state where a gas transport passage is shielded when the engine of FIG. 2 is installed in reverse. It is the Example solid view of the crankcase 1st main body structure of this invention. FIG. 5 is a three-dimensional view of an embodiment of a crank and a piston on which the crankcase first main body of FIG. 4 is installed. It is the Example solid view of the crankcase second main body structure of this invention. It is the Example solid view of the crankcase 2nd body structure of this invention from another angle. It is a flow route schematic diagram of the engine oil of the engine lubrication device of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Oil box 2 Crankcase 2A 1st main body 2B 2nd main body 20 Crank chamber 21 Oil absorption path 211 1st one way valve 2111 Valve nozzle 2112 Sphere 2113 Spring 22 1st oil transport path 23 Gas transport path 24 Pin 241 Conical part 3 Gear box 31 Third oil transport passage 4 Swing arm chamber 41 Second oil transport passage 42 First oil circulation passage 421 Second unidirectional valve 5 Cylinder 6 Crank 61 Weight 62 Piston 7 Gas oil filter 71 Second oil circulation Path 711 Third unidirectional valve 72 Advance passage 73 Outlet passage

Claims (5)

The four-stroke engine lubrication system includes an oil box, a crankcase, a gear box, a swing arm chamber, and a gas oil filter. The oil box is filled with engine oil, and a crank for connecting a weight is placed in the crankcase. The crank is connected to the piston installed in the cylinder,
The oil box and the crankcase communicate with each other through an oil absorption passage, and a first unidirectional valve is installed in the oil absorption passage
The crankcase and the gearbox communicate with each other through a first oil transport passage,
The gear box and the swing arm chamber communicate with each other through a second oil transport passage, and the gear box and the oil box communicate with each other through a third oil transport passage.
The swing arm chamber and the crankcase communicate with each other through a first oil circulation passage, and a second unidirectional valve is installed in the first oil circulation passage.
The gas oil filter and the oil box communicate with each other through a second oil circulation passage, and a third unidirectional valve is installed in the second oil circulation passage, and the gas oil filter and the crankcase are connected to each other. The gas oil filter and the cylinder communicate with each other through an air passage,
When the piston moves in the cylinder and generates a negative pressure in the crankcase, the first unidirectional valve, the second unidirectional valve, and the third unidirectional valve are opened, and thereby the oil box The engine oil in the swing arm chamber and the gas oil filter is sucked into the crankcase,
When the piston motion creates a positive pressure in the crankcase, engine oil and waste air in the crankcase are pressed together into the gearbox, creating a positive pressure in the gearbox, thus in the gearbox. Engine oil and waste air are press-fitted into the oil box and the swing arm chamber, and waste air that has entered the oil box creates positive pressure in the oil box, and the waste air is introduced into the gas oil filter. The gas and oil are separated, the separated gas is fed into the cylinder, and the separated engine oil returns to the crankcase, thus completing the lubrication and circulation of the engine oil to the engine. 4-stroke engine lubrication system.   The four-stroke engine lubrication device according to claim 1, wherein the first unidirectional valve includes a valve nozzle, a sphere, and a spring, the valve nozzle is installed in the oil absorption passage, the spring acts on the sphere, and an external force In a state in which the sphere does not receive the valve nozzle, the sphere maintains a blockage to the valve nozzle, shields the oil suction passage, and prevents engine oil in the crankcase from flowing back to the oil box. 4-stroke engine lubrication system.   4. The four-stroke engine lubricating device according to claim 1, wherein the second unidirectional valve and the third unidirectional valve are rubber valves.   2. The four-stroke engine lubrication device according to claim 1, wherein the crankcase has a gas transport passage connected to the air advance passage, a pin is installed in the gas transport passage, and the engine is installed reversely. The four-stroke engine lubrication device, wherein the pin closes the gas transport passage by its weight so that oil gas is not transported to the gas oil filter.   5. The four-stroke engine lubrication device according to claim 4, wherein one end of the pin is provided with a conical portion having an outer diameter larger than an outlet of the gas transport passage, and the conical portion closes the outlet of the gas transport passage. A four-stroke engine lubricator.

Images