JPS593128Y2 - engine oil supply device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of an oil supply device for a general-purpose four-stroke engine.

Since the oil (lubricating oil) of a general-purpose engine is consumed and decreases during its operation, it is desired to automatically replenish the oil when the oil decreases.

This invention meets the above-mentioned needs by automatically replenishing oil into the crankcase from an auxiliary oil tank installed near the engine when the oil in the crankcase decreases below the set oil level. The object of the present invention is to provide an oil replenishing device that can extend refueling time and continuous operation, and can facilitate refueling even when installed in a machine where it is difficult to directly refuel the engine. .

However, as an example of the prior art that achieves the above object, there is a technique described in Japanese Utility Model Publication No. 45-20330, which states that replenishment of oil from the auxiliary oil tank into the crankcase depends on its gravity. Because it is done by
The location of the tank is limited, and a plurality of valves with a complicated structure are required, so there is a problem that it is not economical.

The engine oil replenishing device of the present invention is intended to achieve the above-mentioned objectives and solve the problems, and includes an auxiliary oil tank installed near the engine, the tank communicating with the suction side of the pulse pump, and the pump The discharge side of the pump is communicated with the inside of the crankcase, and the pulse detection means for operating the pump is located above a predetermined oil level in the crankcase and communicates with the working chamber of the pump so that the oil in the crankcase is below the level. The pump is activated by fluctuations in the internal pressure of the crankcase at the time of the crankcase.

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings.

In the figure, reference numeral 1 is a crankcase of a general-purpose four-stroke engine, and reference numeral 2 is an auxiliary oil tank, which is installed at a position near the engine where it can be easily used.

The tank 2 communicates with the suction side of a diaphragm pulse pump 3, and the discharge side of the pump 3 communicates with an oil filler port 4 opened at the top of the crankcase 1.

A pulse detection means 6 is opened slightly above a predetermined oil level 5 in the crankcase 1, that is, a level at which the minimum amount of oil is required, and the detection means 6 is communicated with the working chamber 7 of the pump 3. Valves io and n that open and close alternately are provided on the suction side and the discharge side of the pump chamber 9, which is partitioned by a diaphragm 8 and a diaphragm 8.

Tank 2 and pump 3, pump 3 and lubrication [''
4. Communication between the detection means 6 and the pump 3 is achieved using a hose, steel pipe, etc. made of a flexible material.

In the oil supply device configured as described above, when the oil level in the crankcase 1 falls below a predetermined level, the pulse detection means 6 detects the internal pressure fluctuation of the crankcase 1 and transmits it to the working chamber 7 of the pump 3. 8 to fill the crankcase 1 with oil from the auxiliary oil tank 2.

As a result of this oil filling, the oil level in the crankcase 1 rises, and when the opening of the detection means 6 is immersed in the oil,
Fluctuations in the internal pressure of the crankcase 1 are no longer detected, and the operation of the pump 3 is stopped.

The pulse detection means 6 has a relatively long threaded portion 12 formed on its outer periphery to be fixed to the crankcase 1, and a scale 13 is carved on the upper outer periphery of the threaded portion 12 exposed to the outside of the crankcase 1.

In this case, the height position of the tip opening relative to the oil level can be adjusted by adjusting the screwing amount, which not only makes it possible to replenish oil according to the driving conditions of the vehicle, but also adjusts the screwing amount to adjust the height of the tip opening relative to the oil level. This is preferable because it also functions as an oil level gauge by reading the scale 13 during operation.

As explained above, in the engine oil supply device according to the present invention, when the oil level in the crankcase falls below a preset level, the pulse pump automatically operates to supply oil from the auxiliary oil tank to the crankcase. Since the oil level can be refueled to a specified level or higher, the time required to refuel the engine and its continuous operation time can be extended.In addition, the replenishment tank can be adjusted to meet the conditions of the machine in which the engine is installed. Since it can be installed freely in any location that is easy to use, it can be easily refueled even in machines where it is difficult to refuel the engine directly.
Moreover, there is an effect that a relatively large-capacity tank can be provided by effectively utilizing space.

[Brief explanation of drawings]

The figure is a partially cross-sectional configuration explanatory diagram showing an embodiment of the present invention. 1... Crank case, 2... Auxiliary oil tank, 3... Pulse pump, 4...
...Oil filler port, 5...Predetermined oil level, 6...
...Pulse detection means, 7... Working chamber, 8.
...Diaphragm, 9...Pump chamber, 1
0, 11...Valve, 12...Threaded part, 1
3...Scale.

Claims (1)

[Scope of utility model registration request] An auxiliary oil tank is disposed near the engine, the tank is communicated with the suction side of a pulse pump, the discharge side of the pump is communicated with the inside of the crankcase, and the pulse detection means for operating the pump is installed at a predetermined location inside the crankcase. located above the oil level and communicating with the working chamber of the pump;
An oil replenishing device for an engine, characterized in that the pump is activated by fluctuations in the internal pressure of the crankcase when oil in the crankcase is below the level.