JP2525609Y2 - Vehicle oil level sensor - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The invention relates to a vehicle oil level sensor.

(Prior art) A vehicle oil level sensor detects the oil level by the vertical movement of a float immersed in an oil pan below the engine, and detects the oil level below a desired level. An alarm lamp provided on the meter is turned on.

In addition to the level sensor, the vehicle is provided with a level bar as a means for checking the amount of oil and dirt during a start-up inspection.

A gauge indicating the range between the H level and the L level is engraved on this level bar, and a state where the oil adhesion position is below the L level at the time of confirmation indicates that the oil is replenished. By the way, as shown in FIG. 7, the oil level inside the oil pan is high when the engine is stopped, is located at the point A in the figure, and becomes low when the engine is started and the oil is circulated to various parts. It decreases to the position indicated by point B in the figure, and the difference becomes a.

(Problem to be Solved by the Invention) The level of the liquid level at which the alarm of the level sensor is displayed is set at the L level position of the level bar when the engine is stopped, and in a truck or the like, as shown in FIG. As shown in the figure, the check switch sw provided on the driver's seat side is turned on, and the reed switch sw1 constituting the sensor is closed according to the liquid level, and the alarm lamp L connected in series to this turns on the alarm to turn on the alarm. Display is performed.

That is, the conventional level sensor detects the lowest position at point A, which is a high liquid level at the time of starting, and checks the presence or absence of the oil amount by turning on the check switch sw at the time of starting.

Therefore, when the engine is running, the oil level is different from that when the engine is stopped for a long time, and the oil amount cannot be confirmed.

For this reason, for example, a long-distance truck, which keeps driving for a long time, is insufficient as a level detection system.

This invention solves the above problem, and is not affected by before and after the start of the engine, and detects and informs the oil replenishment timing at each level of the oil level in a vehicle, so that it can be notified. It is intended to provide.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, in the first embodiment of the invention, a hollow rod immersed in an oil pan and a liquid arranged on the outer periphery of the hollow rod are provided. A float that moves up and down according to the surface height, a stopper that is arranged on the outer circumference of the hollow rod and regulates the upper and lower limit positions of the float, and is located inside the hollow rod and responds when the magnet provided on the float comes to the opposing position In a vehicle oil level sensor provided with a magnetically sensitive element that opens and closes a switch, a second position is provided at a position opposite to a position of a magnet provided on the float when the liquid level is in a state of oil replenishment when the engine is stopped. A first magnetically sensitive element, a second magnetically sensitive element provided at a position separated from this position by a distance corresponding to a difference in liquid level that changes when the engine is driven, and a serially connected first magnetically sensitive element. A first indicator lamp of a continuous safety indicator color, and a second indicator lamp of a warning indicator color different from the safety indicator color connected in series to the second magnetically sensitive element; When a series circuit of a magnetic sensitive element and a first indicator lamp and a series circuit of a second magnetic sensitive element and a second indicator lamp are connected in parallel, a connection point is connected to an ignition switch, and when the oil level is sufficient, ,
When the engine is stopped and immediately after the engine is started, after the safety color of the first indicator lamp is turned on, both the first and second indicator lamps are turned off during the operation of the engine, and the oil level becomes low. When sufficient, the safety color of the first indicator lamp is turned off when the engine is stopped and immediately after the engine is started, and the warning color of the second indicator lamp is turned on while the engine is operating. It is characterized by.

In a second embodiment of the present invention, a hollow rod immersed in an oil pan, a float arranged on the outer periphery of the hollow rod and rising and falling according to the liquid level, and arranged on the outer periphery of the hollow rod, A stopper for regulating the upper and lower limits of the float, and a level sensor for vehicle oil that is provided inside the hollow rod and has a magnetically sensitive element that opens and closes the switch in response to the magnet provided on the float coming to the opposing position A first magnetically sensitive element provided at a position opposite to a position of a magnet provided on the float when the liquid level is in an oil replenishing state when the engine is stopped, and a liquid level that changes from this position when the engine is driven. A second magnetic sensitive element provided at a position separated by a distance corresponding to the difference between the first magnetic sensitive element and a hydraulic switch closed when the lubricating oil pressure connected in series to the second magnetic sensitive element is equal to or greater than a predetermined value; , A display lamp which is driven in two magnetically sensitive element, and is provided, a first magnetically sensitive element, and a series circuit of the second magnetic sensitive element and the oil pressure switch connected in parallel,
When the oil level is sufficient, when the engine is stopped, the first indicator lamp is turned on only by the first magnetically sensitive element, and immediately after the engine is started, the first magnetically sensitive element and the second magnetically sensitive element are turned on. The first indicator lamp is turned on in cooperation with the element, the indicator lamp is turned on only by the second magnetic sensitive element during operation of the engine, and when the oil level is insufficient, the first magnetic sensitive element is The first indicator lamp is turned off when the engine is stopped and immediately after the engine is started, and the second magnetically responsive element turns on the first indicator lamp for a predetermined time immediately after the engine is started, and then turns on during the operation of the engine. Is characterized in that the first display lamp is turned off.

(Operation) According to the above configuration, the liquid level is detected at the corresponding position even when the engine is stopped and after the engine is started, and the oil replenishment timing is notified regardless of whether the engine is stopped or operating. be able to.

(Embodiments of the Invention) Hereinafter, embodiments of the invention will be described in detail with reference to the drawings.

1 to 3 show a first embodiment of the present invention.

In the drawing, 1 is a hollow rod immersed in an oil pan, 2 is a float inserted through the outer periphery of the rod 1 and raised and lowered according to the level of oil O, and 3 and 4 are the rods 1 and 2.
And upper and lower stoppers that are fixedly arranged above and below the upper and lower sides and regulate the upper and lower limits of the elevation position of the float 2.

A ring magnet 5 for detection is embedded in the lower part of the inner circumference of the float 2. In contrast, the rod 1
A pair of normally open reed switches 6, 7 are fixedly arranged at different heights inside the hollow space.

One reed switch 6 arranged at a high position detects the liquid level when oil replenishment is necessary when the engine is stopped, and the height corresponding to the position A when oil replenishment is necessary in FIG. The float 2 is in the raised position, and the circuit is opened when the magnet 5 approaches.

The reed switch 6 is electrically connected to the ignition switch 8 via a green lamp 9 for indicating an appropriate level.

The other reed switch 7, which is arranged at a lower position, is at a lower position by the distance a in FIG. 7 and is closed at the level position when oil replenishment is required during engine operation (O
N) The oil replenishment is arranged at a position corresponding to the position B when the oil replenishment is necessary, and the magnet 5 approaches the reed switch 7 even when the float 2 contacts the lower stopper 4. To close the circuit.

In other words, the reed switch 7 is arranged at a position where it operates at the point B where oil replenishment is required, but the lower stopper 4 is located below it and the float 2 is located further below the closing start point of the reed switch 7. In general, the reed switch 7 is closed when the stopper 4 is hit. FIG. 3 shows the operation of the reed switches 6, 7, wherein the left side shows the characteristics of the reed switch 6, and the right side shows the characteristics of the reed switch 7.

The reed switch 7 is electrically connected in series via a red lamp 10 for displaying a warning on the ignition switch 8.

Therefore, in the configuration of this embodiment, when the liquid level is appropriate, the ignition switch 8 is turned on,
When the engine starts, the green lamp 9 lights for a while,
The display indicates that the oil is at an appropriate level, and then the oil level goes down when the oil circulates through various parts of the engine. On the other hand, the red lamp 10 is kept off. Also, when the oil amount is less than the specified,
Even if the ignition switch 8 is turned on and the engine is started, the green lamp 9 does not turn on, and after a while the oil circulates in various parts of the engine, the liquid level drops, the float 2 moves to a position where oil replenishment is required, and the red The lamp 10 is turned on to warn that it is time to replenish the oil.

4 and 5 show a second embodiment of the present invention.

In the second embodiment shown in the figure, a circuit in which a normally open upper reed switch 21 and a lower reed switch 22 are connected in parallel to a green lamp 20 indicating one appropriate liquid level,
They are connected in series. As in the first embodiment, the reed switch 21 is disposed at a position where oil supply is required when the engine is stopped and the reed switch 21 is opened (OFF).
Is arranged at a distance a from the reed switch 21, but by devising the length of the magnet 5 arranged on the float 2, even if oil replenishment is required when the engine is stopped as shown in FIG. It closes (ON) and continues to close even when the engine is running and the oil level drops, and when the liquid level drops by the decrease in the liquid level due to lubrication after engine operation, oil refilling It is opened (OFF) only when necessary. As a result, when the oil is in the proper liquid level range, at least one of the reed switches 21 and 22 is turned on during engine stop and operation, so that the green lamp 20 is turned on.

Reference numeral 23 in the figure denotes a hydraulic switch connected in series to the lower reed switch 22. The hydraulic switch 23 closes a circuit by driving the engine and operates during operation.
Switch to open / closed state detection.

In the above configuration, when the oil is at an appropriate level, one of the reed switches 21 and 22 is in a state in which the circuit is closed, and the ignition switch 8 is turned on.
When the engine is driven, the hydraulic switch 23 closes the circuit, whereby the green lamp 20 is turned on.

When the level is reduced by lubrication when the oil is at an appropriate level, the upper reed switch 21 is turned off as shown in FIG.
2 keeps the ON state, the green lamp 20 remains lit.

On the other hand, if the oil level is not at an appropriate level, as shown in FIG. 5, immediately after the start of operation of the engine, the upper reed switch 21 is turned off, but the lower reed switch 22 is turned on.
Therefore, the green lamp 20 is turned on. However, if the oil level is reduced by lubrication,
Since the oil level is below the point B, the magnet 5 of the float 2 drops to the position where the lower reed switch 22 is turned off. This state does not change even if the float 2 is lowered until the float 2 hits the lower stopper 4. As a result, if the oil level is not at an appropriate level, the green lamp 20 is turned off when the oil level is reduced by lubrication after the operation of the engine is started, to warn that it is time to replenish the oil.

FIG. 6 shows a modification of the second embodiment. In addition to the above-described configuration, a level check switch 24 and a lamp-out check switch 25 are connected in series with a green lamp 20 therebetween. . In this configuration, the ON / OFF state of the reed switch 21 can be detected by turning on the level check switch 24 alone before starting the engine.

By simultaneously turning on the switches 24 and 25, it is possible to check whether or not the green lamp 20 is out.

(Effects of the Invention) As described in detail in the above embodiments, in the vehicle oil level sensor according to the invention, the liquid level is detected at the corresponding position even when the engine is stopped and after the engine is started. Therefore, there is an effect that when the engine is stopped, the oil replenishment timing can be detected and notified regardless of the state during operation.

[Brief description of the drawings]

1 to 3 show a first embodiment of the present invention.
FIG. 2 is a diagram illustrating the structure, FIG. 2 is a diagram illustrating the circuit, FIG. 3 is a diagram illustrating the driving state, and FIGS. 4 and 5 show the second embodiment.
FIG. 5 is a circuit diagram, FIG. 5 is a driving state diagram, FIG. 6 is a circuit diagram showing a modification of the second embodiment, FIG. 7 is a graph showing a decrease in oil level before and after starting the engine, and FIG. FIG. 8 is a circuit diagram of a conventional level sensor. 1 Hollow rod 2 Float 3 4 Vertical stopper 5 Magnet for detection 6,7,21,22,31,32 Vertical reed switch 9,20 Green lamp (for proper display) Lamp) 10,30 …… Red lamp (Alarm display lamp)

Claims (2)

(57) [Scope of request for utility model registration] 1. A hollow rod immersed in an oil pan,
A float disposed on the outer periphery of the hollow rod and rising and falling in accordance with the liquid level; a stopper disposed on the outer periphery of the hollow rod to regulate upper and lower limit positions of the float; In the vehicle oil level sensor, which is provided with a magnetically sensitive element that opens and closes a switch in response to the magnet provided at the opposing position, the float when the liquid level is in the oil replenishment state when the engine is stopped. A first magnetic sensing element provided at a position facing the position of the provided magnet; and a second magnetic sensing element provided at a position separated from this position by a distance corresponding to a difference in liquid level that changes when the engine is driven. A first indicator lamp of a safety indication color connected in series to the first magnetically sensitive element; and a warning indicator connected in series to the second magnetically sensitive element and having a different color from the safety indication color. A second indicator lamp of a notice indicator color;
A series circuit of the first magnetically sensitive element and the first indicator lamp and a series circuit of the second magnetically sensitive element and the second indicator lamp are connected in parallel, and a connection point is connected to an ignition switch When the oil level is sufficient, the safety color of the first indicator lamp is turned on when the engine is stopped and immediately after the engine is started, and then the first and second indicator lamps are operated while the engine is running. When the oil level is insufficient, the safety color of the first indicator lamp is turned off when the engine is stopped and immediately after the engine is started, and the second indicator lamp is turned off while the engine is operating. A vehicular oil level sensor characterized by lighting a warning color. 2. A hollow rod immersed in an oil pan,
A float disposed on the outer periphery of the hollow rod and rising and falling in accordance with the liquid level; a stopper disposed on the outer periphery of the hollow rod to regulate upper and lower limit positions of the float; In the vehicle oil level sensor, which is provided with a magnetically sensitive element that opens and closes a switch in response to the magnet provided at the opposing position, the float when the liquid level is in the oil replenishment state when the engine is stopped. A first magnetic sensing element provided at a position facing the position of the provided magnet; and a second magnetic sensing element provided at a position separated from this position by a distance corresponding to a difference in liquid level that changes when the engine is driven. An element, a hydraulic switch that is connected when the lubricating oil pressure connected in series with the second magnetically sensitive element is equal to or greater than a predetermined value, and an indicator lamp that is driven by the first and second magnetically sensitive elements; The first magnetically sensitive element, the series circuit of the second magnetically sensitive element and the hydraulic switch are connected in parallel, and when the oil level is sufficient, the first magnetically sensitive element is stopped when the engine is stopped. The first indicator lamp is turned on only by the sensitive element, and immediately after starting the engine, the first indicator lamp is turned on in cooperation with the first magnetic sensitive element and the second magnetic sensitive element, When the engine is running, the indicator lamp is turned on only by the second magnetically sensitive element, and when the oil level is insufficient, the first magnetically sensitive element is used to stop the engine when the engine is stopped and immediately after the engine is started. The first indicator lamp is turned off, and the second magnetically responsive element turns on the first indicator lamp for a predetermined time immediately after the engine is started, and then the engine is running. Level sensor of the oil vehicle, characterized in that so as to turn off the first display lamps.