JPS606591Y2 - Engine lubricant warning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an engine oil lubricating oil warning device that operates when lubricating oil is insufficient or oversupplied.

Conventionally, there are various electrical warning devices that warn of inappropriate lubricating oil level, but all of them warn of a lack of lubricating oil while the engine is running, or when the lubricating oil level is abnormally inclined. The purpose is to prevent engine seizure by issuing a warning.

Furthermore, in general-purpose engines, lubricating oil is generally supplied with insufficient lubricating oil without replacing the entire lubricating oil.

For this reason, it is difficult to estimate the amount of oil to be refilled, and the oil may be refilled above the upper limit level, resulting in an abnormal rise in oil temperature or oil blowout including oil rising due to overflow.

The present invention was developed in view of the above points, and a level detection switch is provided at each of the lower and upper limits of the lubricant level to form independent alarm circuits, and the alarm circuit on the upper limit level is By connecting a switch mechanism that turns on and off by attaching and detaching the fuel filler cap, it not only warns of a lack of lubricating oil during operation, but also prevents engine seizure.
To provide a lubricating oil alarm device for an engine capable of preventing over-supplying by giving a warning at the time of replenishing, and preventing abnormal rise in oil temperature and oil blow-out including oil rising due to over-supplying.

Next, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

FIG. 1 shows a sectional view of the lower part of the crankcase in which the alarm device of the present invention is installed.

In FIG. 1, a float 1 is attached to a shaft 4 erected in an oil pan 3 in a crankcase 2, and is configured to move up and down depending on the level of lubricating oil.

Further, a clip 5 is fitted to the lower end of the shaft 4 to prevent the float 1 from coming off.

A level detection switch 6.7 is provided within the shaft 4 to detect a lower limit level and an upper limit level of the lubricating oil level.

The level detection switches 6.7 are turned on and off by the contact and separation of magnets 8 and 9 attached to the lower and upper portions of the float 1 to detect the level of each lubricating oil surface.

In addition, a cap 10 that also serves as an oil gauge is attached to the oil filler port 1o.
' is screwed on, and a pressure sensitive switch 11 which also serves as a backing is disposed on the upper edge of the inner periphery of the fuel filler port 10.

This temperature-sensitive switch 11 is set to turn on when the cap 10' comes into contact with it, and turn off when it comes off.

FIG. 2 shows two independent alarm circuits used in the device of the present invention.

The lubricating oil lower limit level alarm circuit 12 is formed as follows.

As a power source, a charging coil 14 disposed on the flywheel magnet 13 is used.
4 is connected to a rectifier 15 to convert the alternating current generated in the charging coil 14 into direct current.

The rectifier 15 connects the DC positive terminal to the lower limit level detection switch 6.
and the negative terminal of the DC current is grounded.

The lower limit level detection switch 6 is connected to one terminal of an alarm member, for example, a buzzer 16 via a resistor R, and the other terminal of the buzzer 16 is grounded.

Therefore, this circuit 12 is formed when the lower limit level detection switch 6 is turned on, and the buzzer 16 is activated.

The lubricating oil upper limit level alarm circuit 17 is formed as follows.

The power source is a floating charging type battery 18, and the positive terminal of this battery 18 is connected to the DC positive terminal of the rectifier 15 through a diode D so that it is charged while the engine is running. The negative pole of is grounded.

The negative electrode of the battery 18 is connected to a pressure-sensitive switch 11 disposed at the fuel filler port 10, and the pressure-sensitive switch 11 is connected to the positive electrode of the battery 18 via a relay coil 19.

On the other hand, the positive terminal of the battery 18 is connected to an upper limit level detection switch 7 via a relay contact 20, and this detection switch 7 is connected to the buzzer 16.

The relay contact 20 becomes non-conductive when the pressure-sensitive switch 11 is on, that is, when the cap 10' is screwed onto the fuel filler port 10, and becomes non-conductive when the pressure-sensitive switch 11 is off. That is, when the cap 10' is removed, the relay contact 20 is closed and conductive by the biasing force of the spring.

Therefore, this circuit 17 is connected to the cap 10' of the fuel filler port 10.
When the upper limit level detection switch 7 is turned on with the pressure sensitive switch 11 turned off and the relay contact 20 conductive, a circuit is formed and the buzzer 16 is activated.

Note that the reference numeral 21 in the figure indicates a float case.

Next, the operation of the present invention constructed as described above will be explained.

First, when the lubricating oil level decreases and reaches the lower limit level during engine operation, the float 1 also decreases in accordance with this liquid level, and the lower limit level switch is activated by the magnetic force of the magnet 8 installed at the bottom of the inner circumference. 6 is turned on, the lower limit level alarm circuit 12 is closed, and the buzzer 16 is activated.

On the other hand, when replenishing lubricating oil into the oil pan 3, by removing the cap 10' from the oil filler port 10, the pressure sensitive switch 11 that was energizing the relay coil 19 is turned off and the relay contact 20 is closed. The upper limit level detection circuit 17 is brought into operation.

In this state, lubricating oil is supplied and when the oil level reaches the upper limit level, the upper magnet 9 of the float 1 rises with the oil level.
The upper limit level switch 7 is turned on by the magnetic force, the upper limit level alarm circuit 17 is formed, and the buzzer 16 is activated.

This prevents oversupply of lubricating oil.

Next, by screwing the cap 10' onto the fuel filler port 10, the pressure sensitive switch 11 is turned on, the relay coil 19 is energized, and the relay contact 20 is turned off.

What is shown in FIG. 3 is a second embodiment of the present invention.

This embodiment relates to the upper limit level alarm circuit 17, and
A limit switch 22 is disposed at the terminal 0, and when the cap 10' is removed, the limit switch 22 is turned on and the upper limit level alarm circuit 17 is put into operation.

Therefore, according to this embodiment, the relay used in the first embodiment becomes unnecessary.

Incidentally, if the pressure sensitive switch of the first embodiment is set to be turned on by removing the cap 10' and turned off by attaching the cap 10', the relay is not required as in the second embodiment. .

Further, in the embodiment of the present invention, the lower limit level switch 6
and a magnet that turns on and off the upper limit level switch 7,
Although the magnets are disposed at the lower and upper portions of the float 1, the magnets may be disposed at only one location by adjusting the positions of the level switches 6.7.

Since the present invention is constructed as described above, it is possible to prevent engine seizure by warning of a lack of lubricating oil during operation, and to prevent oversupply by warning when replenishing.

This has the effect of preventing an abnormal rise in oil temperature due to oversupply and oil blow-out including oil rising.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part of an embodiment of the present invention, FIG. 2 is a circuit diagram of the first embodiment, and FIG. 3 is a circuit diagram of the second embodiment. In the figure, 1 is a float, 3 is an oil pan, 6 and 7 are level detection switches, 8 and 9 are magnets, 10 is an oil filler port, 1
0' is a cap, 11 is a pressure sensitive switch, 16 is an alarm member, 20 is a relay contact, and 22 is a limit switch.

Claims (1)

[Scope of utility model registration request] A lubricating oil that has a magnet installed on a float that moves up and down depending on the level of the lubricant surface, a level detection switch that turns on and off when the magnet approaches and separates, and an alarm that is activated when the switch is turned on. In the alarm system, a level detection switch is provided at each of the lower and upper limits of the lubricating oil level to form an independent alarm circuit for each, and the alarm circuit on the upper limit level can be turned on or off by attaching or removing the oil filler cap. An engine lubricating oil alarm device characterized by having a switch mechanism connected thereto that turns it off.