JPS645045Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Field of industrial application) This invention detects the oil level in the engine oil pan and when the oil level falls below a certain level, the oil is adjusted appropriately regardless of the outside temperature. The present invention also relates to a replenishment device that replenishes automatically.

(Prior Art) Generally, in a vehicle engine, a certain amount of lubricating oil is stored inside an oil pan 2 attached to the lower side of the engine body 1 as shown in FIG. ) to supply oil to mechanical parts, and an oil level detection sensor 3 connected to a controller 4 is installed in the center of the oil pan 2.
A refueling pipe 6a is attached to the side wall of the ignition switch. 8 is closed and the control circuit is energized, the oil level in the oil pan 2 is detected and if the oil decreases,
The replenishment pump 5 is operated to replenish the oil in the auxiliary tank 7 to the oil pan 2, and when the specified amount is reached, the pump 5 is stopped to stop oil replenishment.

The oil level detection sensor 3 has two internal reed switches S ₁ and S ₂ placed at the tip of a bracket 2a that protrudes from the side wall of the oil pan 2 toward the center of the oil, as shown in FIG. A cylindrical case 3a made of a non-magnetic material is enclosed at intervals and a stopper piece 3b is attached to the upper end, and the conductor wires of each reed switch S ₁ and S ₂ are connected to the controller 4. A float 3c with a magnetic ring m embedded in the center is loosely fitted on the outside, and the float 3c moves up and down depending on the amount of oil in the oil pan 2, and normally when the engine is stopped. When the lower limit specified amount is reached or less, the lower switch _S2 closes and the pump 5 operates to supply oil, and when the upper limit specified amount is reached, the upper switch _S1 operates to stop the pump 5. There is.

(Problem that the invention aims to solve) By the way, lubricating oil usually has a low viscosity when the temperature is high, and conversely, a high viscosity when the temperature is low. Because it does not have a corresponding means, it operates without problems when the outside temperature is high and the viscosity of the oil in the auxiliary tank is low, but it has the disadvantage that it does not operate smoothly when the outside temperature is low and the viscosity of the oil is high.

To solve this problem, a heater powered by the engine's battery and a thermoswitch are connected in series and placed inside the auxiliary tank, so that when the outside temperature is low and the oil viscosity is high, the It is conceivable that the device could be heated to allow it to operate without any problems. However, this simply places the heater inside the auxiliary tank, and even when there is no need to supply oil to the oil pan, the circuit is automatically connected when the outside temperature is low, wasting power. This is not an efficient method.

This idea was devised in light of these circumstances, and it goes without saying that when the outside temperature is high,
Automatic oil replenishment can be performed smoothly even when the oil is low, and there is no need to heat the entire oil in the tank, so a small-capacity heater is required, and the heater is only energized when oil is being supplied and when the temperature is low. The purpose of the present invention is to provide an automatic engine oil replenishment device.

(Means and effects for solving the problem) Based on the above purpose, this invention
An auxiliary tank 7 is provided outside the lower oil pan 2, and the auxiliary tank 7 and the oil pan 2 are connected by a pipe 6a via an auxiliary pump 5.
An oil level detection sensor 3 with reed switches S ₁ and S ₂ enclosed above and below is installed inside the tank, and a motor M of a replenishment pump 5 is connected to a controller 4 connected to the sensor 3. In addition to appropriately replenishing the oil in 7 to the oil pan 2, the auxiliary tank 7
An electric heater 10 and an oil temperature detection sensor 11 that closes the contact 11C when the oil temperature is below a predetermined temperature are disposed inside the unit, and the electric heater 10 and the oil temperature detection sensor 11 are connected in series. It is characterized by being connected in parallel with the pump motor M.

In use, when the outside temperature is high, such as in the summer, the oil level detection sensor detects the amount of oil in the oil pan and automatically refills the oil in the auxiliary tank at any time, even when the electric heater is not activated. .

On the other hand, when the outside temperature is low and oil needs to be replenished, such as in the winter, the contacts of the oil temperature detection sensor close and the electric heater is activated, rapidly warming the oil in the tank, especially the oil around the oil inlet. is,
It maintains fluidity and is automatically refilled when the oil in the oil pan decreases, just as when the outside temperature is high.

(Embodiment) Fig. 2 shows an embodiment of this invention. In the oil pan 2 provided on the lower side of the engine body 1 similarly to the above-mentioned one, there is a central part of the oil stored in the oil pan 2 from the side wall. Bracket 2a that extends toward
An oil level detection sensor 3 is attached to the tip of the sensor 3, and the sensor 3 has two reed switches S ₁ and S ₂ sealed vertically at a fixed interval and a stopper piece 3b at the top end. It consists of an attached cylindrical container 3a made of a non-magnetic material, and a float 3c that is loosely fitted on the outside of the container 3a and has a magnetic ring m embedded in the center of the lower surface, and each reed switch S ₁ ,
The S ₂ conductor is connected to the controller 4 outside the oil pan,
This controller 4 is connected to a power source via an ignition switch 8, and an oil supply pipe 6a is attached to the side wall of the oil pan 2.
a is connected to a replenishment pump 5 whose drive motor M is controlled by a controller 4, and the replenishment pump 5 is connected to a suction pipe 7 in an auxiliary tank 7 via a pipe 6b.
connected to a.

By the way, in this invention, the auxiliary tank 7
A heater material 10b (for example, a surface heating element with a heating resistor buried in a resin material) is attached to the surface of a porous iron cylindrical body 10a at the center of the bottom of the suction pipe 7a so as to surround the oil inlet at the lower end of the suction pipe 7a. An electric heater 10 is disposed, and at the bottom of the tank, a bimetal 11b curved upward in a small container 11a is opposed to a rod-shaped contact 11c. 11c is opened, and below 0°C, it is reversed and the contact 11c is opened.
An oil temperature detection sensor 11 is provided which is inverted and closes the contact 11c at temperatures below 0°C, and the electric heater 10 and the oil temperature detection sensor 11 are connected in series by a conductive wire _l1 as shown in FIG. That is, the conductive wire l ₂ , the electric heater 10, the conductive wire l ₁ , the oil temperature detection sensor 11, and the ground connected in this order are connected in parallel to the motor M of the replenishment pump 5.

When using it, when the ignition switch 8 is closed and the controller 4 is energized, if the oil in the oil pan 2 becomes low, the oil level detection sensor 3
The lower switch S is closed by the float 3C,
The oil supply pump 5 is activated. At this time, if the outside air temperature, that is, the oil temperature is high, as in the summer, the oil temperature detection sensor 11 remains open and the heater 10 does not operate, and the oil level detection sensor 3 determines the amount of oil in the oil pan 2. is detected, and the required amount of oil in the auxiliary tank 7 is replenished via the replenishment pump 5. When the oil level reaches the upper limit, the float 3C rises, causing the upper switch _S1 to close and the replenishment pump 5 to be stopped.

On the other hand, when the outside air temperature drops and the oil temperature in the auxiliary tank 7 is low, e.g. 0°C, as in winter, when the oil in the oil pan 2 becomes low, the float 3C of the oil level detection sensor 3 is activated as described above. Then, the lower switch closes and the oil supply pump 5 operates, but at the same time, the contact 11C of the oil temperature detection sensor 11 is also closed in the electric heater 10 and oil temperature detection sensor 11 connected in parallel with the oil supply pump 5. A conductive state is established, and the electric heater 10 is activated to rapidly warm the oil in the tank 7, especially the oil around the oil feed port at the lower end of the suction pipe 7a, and maintain fluidity without solidifying. Therefore, oil is smoothly supplied to the oil pan 2. When the oil level reaches the upper limit, the float 3c rises to close the upper switch _S1 and stop the replenishment pump 5. At this time, even if the oil temperature in the auxiliary tank 7 is low and the contact 11c of the oil temperature detection sensor 11 is closed, the electric circuit is cut off by the controller 4 when replenishment is stopped. Therefore, the oil in the auxiliary tank 7 will not be heated any further. If the oil temperature in the tank 7 becomes high due to heating by the electric heater 10 or an increase in outside air temperature during the replenishment of oil from the auxiliary tank 7 to the oil pan 2, the contact 11c of the oil temperature detection sensor 11 is opened. Return to normal state.

(Effects of the invention) As described above, in this invention, as a device for replenishing engine oil to the oil pan, an electric heater is installed at the bottom of an auxiliary tank provided separately from the oil pan, and the oil temperature inside the tank is maintained at a predetermined level. We installed an oil temperature detection sensor that closes the contact when the temperature is below, and connected this sensor and electric heater in series, which is connected in parallel to the replenishment pump motor, so we can simply install the electric heater inside the oil pan. Unlike those that are simply installed, there is no need to warm up the entire oil in the oil pan when it is cold, only the oil in the auxiliary tank needs to be warmed, and automatic oil replenishment can be performed smoothly even when the outside temperature is low. Moreover, the electric heater has the advantage that a small capacity one is sufficient. Furthermore, the electric heater in the auxiliary tank is designed to heat up only when the temperature is low and while oil is being refilled in the oil pan, so there is no wasted power consumption, and the electric heater has a long lifespan. It has the effect of being able to extend the

[Brief explanation of the drawing]

FIG. 1A is a partially cutaway side view of a conventional oil supply device. Figure B is a sectional view of the oil level detection sensor. FIG. 2 is a partially cutaway side view of an embodiment of this invention. Figure 3 is its circuit diagram. In the figure, 1... engine body, 2... oil pan, 3... oil level detection sensor, 4... controller, 5...
...Replenishment pump, 6a, 6b...Pipe, 7...Auxiliary tank, 8...Ignition switch, 10...
...Electric heater, 11...Oil temperature detection sensor, S ₁ , S ₂
...Reed switch.

Claims (1)

[Scope of utility model registration request] An auxiliary tank 7 is provided outside the oil pan 2 on the lower side of the engine body 1, and the auxiliary tank 7 and the oil pan 2 are connected by a pipe 6a via the auxiliary pump 5. ₁ ,
Oil level detection sensor 3 is installed with S ₂ sealed in the upper and lower sides,
A replenishment pump 5 is connected to a controller 4 connected to the sensor 3.
A motor M is connected to supply the oil in the replenishment tank 7 to the oil pan 2 as appropriate, and an electric heater 10 is installed inside the auxiliary tank 7. An automatic engine oil replenishment device comprising a temperature detection sensor 11, an electric heater 10 and an oil temperature detection sensor 11 connected in series, and a motor M of the replenishment pump connected in parallel.