JPH09317425A - Lubrication device for outboard motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To high-precisely feed a proper amount of lubrication oil, matching with the operation state of an engine for an outboard motor, to an engine. SOLUTION: An outboard motor 4 is attached to a ship hull. An Oil tank attached to the ship hull and storing lubrication oil 34 is provided. An oil passage 43 to communicate an oil tank with the engine 13 of the outboard motor 4 is provided and an oil pump is provided to feed lubrication oil 34 to the engine 13 from the oil tank through the oil passage 43. A control valve 41 to open and close the oil passage 43 is provided. A control device 44 is provided to control opening and closing of the control valve 41 according to the operation state of the engine 13. The control valve 41 is attached to the outboard motor 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating device for supplying lubricating oil to an engine (internal combustion engine) of an outboard motor for propelling a ship.

[0002]

2. Description of the Related Art In a lubrication system for supplying lubricating oil to an engine of an outboard motor to lubricate the engine, an oil tank for accumulating the lubricating oil is usually provided in a hull. Further, an oil passage is provided for communicating the oil tank with the engine of the outboard motor, and an oil pump for supplying lubricating oil from the oil tank to the engine through the oil passage is provided.

By driving the oil pump,
Lubricating oil is supplied to the engine from the oil tank,
This engine is designed to be lubricated.

By the way, it is not preferable that the lubricating oil is supplied to the engine too much or too little.
Therefore, a control valve that opens and closes an oil passage from the oil pump to the engine is provided, and a control device that controls the opening and closing of the control valve according to the operating state of the engine is provided. It is conceivable to supply an appropriate amount of lubricating oil that matches the operating condition to the engine.

[0005]

However, even if configured as described above, if the oil passage from the control valve to the engine is long, air easily enters this oil passage,
In this way, when the air enters, it takes time for the lubricating oil to be supplied to the engine after the opening operation of the control valve, that is, from the opening operation of the control valve to the lubricating oil to the engine. However, there is a problem in that the responsiveness at the time of the supply of the oil is deteriorated, and therefore it is not possible to accurately supply an appropriate amount of lubricating oil that matches the operating state of the engine.

On the other hand, when supplying the lubricating oil to the engine, it has been conventionally proposed that the lubricating oil is first mixed with the fuel supplied to the engine and then supplied to the engine together with the fuel for lubrication. Has been done.

However, when mixing lubricating oil with fuel,
If this lubricating oil is unevenly mixed with the fuel, the lubrication of the engine may become excessive or deficient, and this lubrication may become uneven.

The present invention has been made by paying attention to the above circumstances, so that an appropriate amount of lubricating oil that matches the operating state of the engine of the outboard motor can be more accurately supplied to the engine. The task is to do.

It is another object of the present invention to uniformly lubricate the engine when the lubricating oil is mixed with the fuel and supplied to the engine together with the fuel.

[0010]

The outboard motor lubrication apparatus of the present invention for achieving the above object is as follows.

According to the first aspect of the invention, the outboard motor 4 attached to the hull 3 and the lubricating oil 34 attached to the hull 3
And an oil passage 43 for communicating the oil tank 36 with the engine 13 of the outboard motor 4.
And an oil pump 40 for supplying the lubricating oil 34 from the oil tank 36 to the engine 13 through the oil passage 43.
A control valve 41 that opens and closes the oil passage 43 and a control device 44 that controls the opening and closing of the control valve 41 according to the operating state of the engine 13 are provided. It is attached to.

The invention of claim 2 is, in addition to the invention of claim 1, a fuel tank 27 which is attached to the hull 3 and stores the fuel 24;
And a fuel pump 31 for supplying the fuel 24 from the fuel tank 27 to the engine 13 through the fuel passage 33. The downstream end of the oil passage 43 is located upstream of the fuel pump 31. Of the fuel passage 33.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 is a ship floated on the water surface 2, and arrow Fr indicates the front of the ship 1.

An outboard motor 4 is detachably attached to the rear part of the hull 3 of the ship 1. The outboard motor 4 includes a clamp bracket 6 that is detachably attached to the rear portion of the hull 3, a swivel bracket 8 that is pivotally supported on the clamp bracket 6 through a pivot shaft 7, and a swivel bracket 8. Hydraulic cylinder 9 for rotating the bracket 8 up and down
And a propulsion unit 10 supported by the swivel bracket 8.

The propulsion unit 10 has a case 12, and an engine 1 which is an internal combustion engine is provided above the case 12.
3 is attached, and a cowling 14 that covers the engine 13 from above is provided. At the lower end of the case 12, a propeller shaft 16 whose axial center extends in the front-rear direction is rotatably supported around the axial center. A front portion of the propeller shaft 16 is interlocked and coupled to the engine 13, a rear portion thereof is projected outward from a rear end of a lower end portion of the case 12, and a propeller 17 is attached to a rear end portion of the propeller shaft 16. There is.

An intake pipe 20 is connected to the engine 13. The inside of the intake pipe 20 serves as an intake passage 21, and the intake passage 21 communicates the outside of the engine 13 with a combustion chamber inside the engine 13 and supplies outside air 22 to the combustion chamber through the intake passage 21. It is possible.

Fuel 2 which is gasoline together with the air 22
A fuel supply device 26 is provided for supplying 4 to the combustion chamber. The fuel supply device 26 has a carburetor 23 provided in the middle of the intake passage 21. Further, the fuel supply device 26 includes the fuel tank 2 for storing the fuel 24.
7, the fuel tank 27 is attached to and supported by the hull 3.

A fuel tube 29 for connecting the fuel tank 27 to the float chamber of the vaporizer 23 is provided, and the fuel tube 29 is formed of a flexible tube. A filter 30 is provided in the middle of the fuel tube 29. A low-pressure fuel pump 31 is provided in the middle of the fuel tube 29 between the filter 30 and the vaporizer 23. This fuel pump 31
The drive source is a diaphragm that operates by negative pressure in the crank chamber of the engine 13. When the fuel pump 31 is driven, an appropriate amount of fuel 24 in the fuel tank 27 is supplied to the float chamber of the carburetor 23 through the fuel tube 29 and the filter 30.

In the above case, the fuel tube 29, the filter 30, the fuel pump 31, the carburetor 23 and the intake pipe 20.
The interiors of the above are communicated with each other to form a fuel passage 33, which communicates the fuel tank 27 with the engine 13.

When the engine 13 is in operation, an appropriate amount of fuel 24 is supplied by the carburetor 23 to the air 22 that is taken into the engine 13 through the intake passage 21. Mixture 32
Is supplied to the combustion chamber of the engine 13 where it is used for combustion. The combustion heat of this combustion is converted into motive power, and the engine 13 outputs motive power, which is transmitted to the propeller 17 via the propeller shaft 16 and the like, so that the ship 1 can be propelled forward.

A lubricating device 35 for supplying lubricating oil 34 to the engine 13 is provided.

The lubricating device 35 is a so-called separate oil supply system, and is an oil tank 36 for storing the lubricating oil 34.
The oil tank 36 is attached to and supported by the hull 3. A level sensor 37 for detecting the liquid level of the lubricating oil 34 contained therein is attached to the oil tank 36.

The oil tank 36 is connected to the filter 3
An oil tube 39 connected to 0 is provided, and this oil tube 39 is formed of a flexible tube. The inside of the oil tube 39 is an oil passage 43, and the oil passage 43 connects the oil tank 36 to the engine 13
Filter 30, fuel tube 29, fuel pump 3
1, the carburetor 23, and the intake pipe 20 communicate with each other. In this case, the downstream end of the oil passage 43 is communicated with the filter 30, which is the fuel passage 33 on the upstream side of the fuel pump 31, and the lubricating oil 34 is supplied into the filter 30. ing.

The oil tank 3 is passed through the oil passage 43.
An oil pump 40 that supplies the lubricating oil 34 from 6 to the engine 13 is provided. On the other hand, an electromagnetic control valve 41 that opens and closes the oil passage 43 is provided, and the control valve 41 is attached to and supported by the outboard motor 4. Further, a return oil tube 42 for communicating the control valve 41 with the oil tank 36 is provided, the return oil tube 42 is formed of a flexible tube, and the inside thereof serves as a return oil passage 48. The oil tube 39 on the upstream side of the control valve 41 and the return oil tube 42 are arranged in parallel with each other and integrated so as to be compact, whereby the oil tube 39 and the return oil tube 42 can be easily arranged. It is supposed to be possible.

When the electromagnet of the control valve 41 is turned on and off,
The control valve 41 is adapted to open and close. FIG.
As shown by the solid line, when the control valve 41 opens to open the oil passage 43, the oil tank 36 communicates with the filter 30 through the oil passage 43. In this case, if the oil pump 40 is driven, the lubricating oil 34 in the oil tank 36 is supplied into the filter 30 through the oil passage 43, where it is mixed with the fuel 24. It is supplied to the engine 13 together with the fuel 24, and the engine 13 is lubricated.

On the other hand, as indicated by the alternate long and short dash line in FIG.
When the control valve 41 closes the oil passage 43, the oil passage 43 upstream of the control valve 41 and the return oil passage 48 communicate with each other. in this case,
When the oil pump 40 is driven as above, the lubricating oil 34 in the oil tank 36 is sent to the control valve 41 through the oil passage 43 and then returned to the oil tank 36 through the return oil passage 48. That is, the pressure of the lubricating oil 34 in the oil passage 43 is prevented from unnecessarily increasing.

An outboard motor 4 is provided with an electronic control unit 44 for controlling the opening and closing of the control valve 41 according to the operating state of the engine 13. The control device 44 includes a controller 45 electrically connected to the electromagnet of the control valve 41.
have. In this case, both the control valve 41 and the control device 44 are provided in the outboard motor 4, which facilitates the electrical wiring for connecting them to each other. The controller 45 includes a sensor 46 for detecting the operating state of the engine 13 and a three-dimensional map 47 with acceleration correction added.
And are electrically connected to each other. Engine 1 above
The operating state of No. 3 is determined by the rotational speed of the engine 13, the throttle opening degree of the carburetor 23, the back pressure of exhaust gas in the exhaust system, the tilt angle of the outboard motor 4, and the like.

When the engine 13 is operating, the oil pump 40 is driven and the control device 44 controls the control valve 4 according to the operating state of the engine 13.
1 is controlled to open and close.

The above-mentioned opening / closing control is so-called duty control, in which the control valve 41 is turned on and off so that the opening / closing operation is repeated alternately, and the engine 13 changes from the operating state based on the detection signal of the sensor 46. When more lubricating oil 34 is required, the control valve 4
The ON period of 1 is made longer, or the ON period is made constant and the OFF period is made shorter, whereby more lubricating oil 34 is supplied to the engine 13.

According to the above configuration, the control valve 41 is the outboard motor 4
As compared with the case where the control valve 41 is attached to the hull 3, the control valve 41 is located closer to the engine 13 of the outboard motor 4, and the control valve 41 is connected to the engine 13. The oil passage 43 is shortened to prevent air from entering there.

Therefore, the time from the opening operation of the control valve 41 to the time when the lubricating oil 34 is supplied to the engine 13 is shortened by the amount not disturbed by the air, that is, from the opening operation of the control valve 41. , Responsiveness at the time of reaching the supply of the lubricating oil 34 to the engine 13 is improved.

Further, as described above, the downstream end of the oil passage 43 is located upstream of the fuel pump 31 in the fuel passage 33.
Since it is communicated with the inside of the filter 30, when the oil pump 40 is driven, first, the lubricating oil 3
4 is supplied to the inside of the filter 30 through the oil passage 43, and is mixed with the fuel 24 there. Then, the lubricating oil 34 is supplied to the fuel pump 31 together with the fuel 24.
As a result, the gas is supplied to the engine 13 through the vaporizer 23.

Therefore, the lubricating oil 34 and the fuel 24 are agitated and sufficiently mixed when passing through the fuel pump 31, and uneven mixing of the lubricating oil 34 with the fuel 24 is prevented.

Although the above is based on the illustrated example, the engine 13 may have multiple cylinders. Further, the downstream end of the oil passage 43 may be directly communicated with the engine 13.

FIG. 3 shows another embodiment.

According to this, a fuel injection valve 50 is provided instead of the carburetor 23 according to the above-mentioned embodiment. Further, a vapor separator tank 51 for temporarily storing the fuel 24 sent from the fuel pump 31 through the fuel passage 33 before the fuel injection valve 50 is provided, and the vapor separator tank 51 is attached to the outboard motor 4. Supported and supported.

A high-pressure fuel pump 52 is provided to pressurize the fuel 24 in the vapor separator tank 51 to the fuel injection valve 50 under high pressure and supply it. Further, the regulator 5 for properly adjusting the pressure of the fuel 24 which the fuel injection valve 50 is trying to inject toward the combustion chamber of the engine 13.
3 are provided.

The downstream end of the oil passage 43 is communicated with a vapor separator tank 51, which is a fuel passage 33 upstream of the fuel pump 52, and the lubricating oil 34 is supplied into the vapor separator tank 51. It is supposed to be.

Since other structures and operations are the same as those of the above-described embodiment, common reference numerals are given to the drawings, and description thereof will be omitted.

[0041]

The effects of the present invention are as follows.

According to the first aspect of the invention, an outboard motor mounted on the hull, an oil tank mounted on the hull for storing lubricating oil, and an oil passage for communicating the oil tank with the engine of the outboard motor are provided. An oil pump that supplies lubricating oil from the oil tank to the engine through the oil passage, a control valve that opens and closes the oil passage, and a control device that opens and closes the control valve according to the operating state of the engine. And the control valve is attached to the outboard motor.

Therefore, when the lubricating oil is supplied from the oil tank to the engine through the oil passage by the driving of the oil pump, the control valve is opened / closed according to the operating state of the engine. Is supplied to the engine in an appropriate amount.

In the above case, the control valve is attached to the outboard motor. Therefore, the control valve is located closer to the engine of the outboard motor than when the control valve is attached to the hull. This shortens the oil passage from the control valve to the engine, preventing air from entering there.

Therefore, the time from the opening operation of the control valve to the time when the lubricating oil is supplied to the engine is shortened by the amount not disturbed by the air, that is, from the opening operation of the control valve to the engine. The responsiveness at the time of reaching the supply of the lubricating oil is improved, so that it is possible to accurately supply the appropriate amount of the lubricating oil that matches the engine operating state.

According to a second aspect of the present invention, a fuel tank is attached to the hull for storing fuel, a fuel passage for communicating the fuel tank with the engine, and a fuel is supplied from the fuel tank to the engine through the fuel passage. And a downstream end of the oil passage is communicated with a fuel passage upstream of the fuel pump.

Therefore, when the oil pump is driven, first, the lubricating oil passes through the oil passage and is supplied to the fuel passage upstream of the fuel pump, where it is mixed with the fuel. Then, next, the lubricating oil will be supplied to the engine together with the fuel by the fuel pump.

Therefore, the lubricating oil and the fuel are agitated and sufficiently mixed when passing through the fuel pump, and it is possible to prevent the mixing of the lubricating oil and the fuel from being unbalanced.
For this reason, a more uniform and more uniform lubrication of the engine is achieved.

[Brief description of drawings]

FIG. 1 is a partial diagrammatic view of an outboard motor.

FIG. 2 is a partial side sectional view of a rear portion of the ship.

FIG. 3 is a diagram corresponding to FIG. 1 in another embodiment.

[Explanation of symbols]

 1 Ship 3 Hull 4 Outboard Motor 13 Engine 17 Propeller 21 Intake Passage 22 Air 23 Vaporizer 24 Fuel 26 Fuel Supply Device 27 Fuel Tank 29 Fuel Tube 31 Fuel Pump 32 Mixture 33 Fuel Passage 34 Lubricating Oil 35 Lubricating Device 36 Oil Tank 39 Oil Tube 40 Oil Pump 41 Control Valve 42 Return Oil Tube 43 Oil Passage 44 Control Device 48 Return Oil Passage 50 Fuel Injection Valve 52 Fuel Pump

Claims (2)

[Claims] 1. An outboard motor mounted on a hull, an oil tank mounted on the hull for storing lubricating oil, an oil passage for communicating the oil tank with an engine of the outboard motor, and an oil passage for passing the oil passage. An oil pump that supplies lubricating oil from the oil tank to the engine, a control valve that opens and closes the oil passage, and a control device that controls the opening and closing of the control valve according to the operating state of the engine are provided. An outboard motor lubricator with a valve attached to the outboard motor. 2. A fuel tank attached to the hull for storing fuel, a fuel passage for communicating the fuel tank with the engine, and a fuel pump for supplying fuel from the fuel tank to the engine through the fuel passage. The outboard motor lubrication device according to claim 1, wherein the oil passage is provided so that a downstream end of the oil passage communicates with a fuel passage upstream of the fuel pump.