JPS6228287B2 - - Google Patents

Abstract

PURPOSE:To eliminate the trouble due to shortage of oil by monitoring the amount of engine oil dispersed by a dipper in a unit time and informing that the amount of oil in a case reaches the allowable lower limit, when the amount of engine oil reduces below a set value. CONSTITUTION:A dipper 4 is installed onto a crankshaft 3, and stirs the engine oil A in a crankcase 2 according to the revolution of the shaft 3, through the driving of an engine 1, and the oil is dispersed into the case 2. When the amount of oil A is over the allowable lower limit a chamber B and one divided chamber 5c are filled with oil A, and a pressure switch K3 does not operate, since the variation of the gas pressure in the case 2 which is caused by the vertical movement of a piston does not directly act onto a diaphragm 5f. On the other hand, when the amount of oil A reduces below the allowable lower limit, and the chamber B and the other divided chamber 5c are short of oil A, the variation of gas pressure directly acts onto the diaphragm 5f, and the pressure switch K3 operates, and a monitor output is output, so the trouble due to shortage of oil can be prevented.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an engine oil monitoring device that monitors the amount of engine oil stored in the crankcase of an engine. The purpose of this system is to detect when the amount of fuel has fallen below a set allowable lower limit, thereby ensuring safe operation of the engine.

[Conventional technology]

Engine oil is extremely important for reducing friction between the various parts that make up an engine and allowing each part to operate smoothly. The supply of engine oil to each member of the engine is achieved by stirring the oil with a dipper provided on the crankshaft and scattering it toward each member of the engine.

In this way, the engine oil stored in the crankcase is agitated by the day par and distributed to each component in a splashing manner.Of course, if the amount of engine oil decreases, it will be supplied to each component in a splashing manner. The amount of engine oil will also decrease.

Therefore, if the engine oil in the crankcase decreases below the allowable lower limit of the amount of engine oil set by the engine, the amount of engine oil splashed and supplied to each part of the engine will be completely insufficient. As a result, the movement of each part of the engine loses its smoothness, which not only drastically and rapidly reduces the operating efficiency of the engine, but also causes serious accidents such as "seizure", and the engine This results in the serious inconvenience of loss of function.

For this reason, it is extremely important to know the amount of engine oil stored in the crankcase, but unlike fuel, engine oil is not consumed in a short period of time. It is extremely troublesome and often a waste of work to inspect the amount at each time, so it is generally inspected at regular intervals regardless of the number of times it is used.

However, since the period until the next inspection is generally relatively long, it is easy to forget to inspect the engine oil. There are cases where the amount of engine oil decreases rapidly within a short period of time, and this has caused great anxiety in regularly inspecting the engine oil at long intervals.

In order to eliminate this anxiety, a device that constantly monitors the amount of engine oil was developed using the
There are publications such as Japanese Utility Model Publication No. 57-11212.

In the system disclosed in Japanese Utility Model Application Publication No. 56-59917, a detector such as a pressure sensor is attached to the inner surface of the crankcase where oil droplets are supplied, and when the oil droplets hit this detector, engine oil is released. After learning that oil was being sprayed, the system began monitoring the amount of engine oil.
In the system disclosed in Publication No. 11212, an oil receiving shelf is integrally molded into the crankcase to receive oil droplets on the inner surface of the crankcase where oil spray is supplied. The amount of engine oil is monitored by arranging a detector whose electrical resistance changes in the oil pan and detecting the presence of engine oil in the oil pan.

[Problem that the invention seeks to solve]

The system disclosed in Japanese Utility Model Application Publication No. 56-59917 monitors the amount of engine oil by capturing pressure changes caused by direct collision of oil droplets, so it is difficult to set the allowable lower limit value of engine oil. However, it is difficult to set the criteria for determining this, and since pressure fluctuations due to the operation of the operating parts within the crankcase are sensed, it is difficult to obtain accurate and stable monitoring operations.

In addition, the device shown in Japanese Utility Model Application Publication No. 57-11212 is provided with an oil receiving shelf that receives oil droplets, so the engine oil detection operation by the detector is stable, and this oil receiving shelf The advantage is that the allowable lower limit of engine oil can be set accurately and easily by setting the amount of oil flowing out from the crankcase, but since the oil pan is integrally molded into the crankcase, it is complicated. It is difficult to manufacture a crankcase with a unique shape, and there is a major complaint that it cannot be implemented on existing crankcases that do not have an oil pan.Furthermore, the oil pan is integrally molded into the crankcase. Therefore, the structure of the oil receiving shelf must be simple, which limits the types of detection objects that can be used to detect engine oil, making it difficult to monitor engine oil more reliably and accurately. I couldn't get it.

The present invention was devised in order to eliminate the drawbacks and dissatisfaction of the above-mentioned conventional examples.The present invention is made by manufacturing a chamber that serves as an oil pan separately from the crankcase, and placing this chamber at a desired location within the crankcase. The technical challenge is to make it possible to install the device.

[Means for solving problems]

The means according to the present invention includes: drilling a mounting hole in a crankcase wall location where engine oil A stirred by a dipper 4 provided on the crankshaft 3 is scattered; and intruding oil A2, which is the scattered oil A1, is It can enter from the upper end and flow out from the lower end, and the amount of this outflowing oil A3 per unit time is larger than the amount of intruding oil A2 per unit time when the amount of engine oil A is below the set lower limit value, but engine oil Providing a case 5 having a chamber B configured such that the amount of intruding oil A2 is smaller than the amount per unit time when the amount of oil A is below a set lower limit;
The chamber B of the case 5 is tightly attached and fixed to the crankcase 2 in a position where it is inserted into the crankcase 2, and the detection body K for detecting the accumulation of engine oil A is provided in the chamber B of the case 5. It is in.

[Effect]

Since the date par 4 is attached to the crankshaft 3, the engine 1 drives the engine oil A stored in the crankcase 2 as the crankshaft 3 rotates, stirring the engine oil A. are scattered into the crankcase 2.

At this time, as is clear from Fig. 1, the amount that sinks into the engine oil A in the day part 4 differs depending on the amount of engine oil A, so the larger the amount of engine oil A stored, the more oil will be scattered. The amount of A1 also increases.

Therefore, if the chamber B is located on the inner surface of the crankcase 2 where the scattered oil A1 is scattered, the scattered oil A1 will enter into this chamber B, but as a matter of course, the scattered oil A1 The greater the amount of intrusion oil A2, the greater the amount of intrusion oil A2 that intrudes into chamber B per unit time.

In this way, since the amount of oil A2 that enters chamber B per unit time is approximately proportional to the amount of engine oil A stored in crankcase 2, the amount of engine oil A can be adjusted within a preset allowable amount. Set it to the lower limit value, know the amount of intruding oil A2 per unit time at this time, and set the amount of outflowing oil A that is the same as the amount of intruding oil A2 per unit time when this engine oil A reaches the allowable lower limit value.
chamber B so that the amount of 3 can be obtained per unit time.
By setting the flow path area of the outflow hole B2 formed at the lower end of the chamber, it becomes impossible for engine oil A to accumulate in chamber B when the amount of engine oil A is below the allowable lower limit. On the other hand, if the amount of engine oil A is above the allowable lower limit, the amount of oil A2 entering chamber B will be greater than the amount of oil A3 flowing out, so engine oil A will accumulate in chamber B. become.

This state continues as long as the engine 1 is running.

The configuration and form of this chamber B are not particularly limited as long as the above-mentioned functions are exhibited, but the operating function of the detection body K provided in this chamber B and the crankcase of chamber B itself are important. It is preferable that this be determined individually depending on the type of attachment in 2.

Further, the position of the chamber B, that is, the mounting hole that provides the mounting position of the case 5 with respect to the crankcase 2, should be determined in relation to the configuration and form of the chamber B.

In this way, if there is engine oil A in the crankcase 2 that is equal to or higher than the allowable lower limit, as long as the engine 1 is running, the engine oil A will remain in the chamber B. By detecting the accumulation of oil A in chamber B with detection body K, it is possible to detect that the amount of engine oil A is above the allowable value, and conversely, when the amount of engine oil A is below the allowable lower limit. If there is, engine oil A will not be able to accumulate in chamber B, and detection body K will not be able to detect the accumulation of engine oil A and will not be able to detect that the amount of engine oil A is below the allowable value. It will be detected.

Case 5 forming chamber B is crankcase 2
Since it is manufactured as a separate item from the crankcase 2 and is assembled and fixed into the mounting hole formed in the crankcase 2, it can be assembled without being limited by the various and numerous manufacturing conditions for the crankcase 2. It is possible to obtain the best chamber B configuration for the operation of the detecting body K, and it can also be installed to an existing engine 1 by simple machining.

In this way, since the chamber B and the detection body K, which are the main parts for detecting the amount of engine oil A, are separate from the crankcase 2 and are assembled to the crankcase 2, The monitoring device that is most suitable for each engine 1 can be freely selected and installed, and in the event of a failure, it can be easily removed and replaced.

〔Example〕

In the case of the embodiment shown in FIG. 2, two thermistors K1 and K2 are used as the detection body K, and the case 5 forming the chamber B has its main body part bored in the side wall of the crankcase 2. the front wall plate 5a to the crankcase 2.
The front wall plate 5a is attached and fixed to the crankcase 2 in contact with the inner surface, and has an inlet port B1 with a large opening area in the upper part of the front wall plate 5a, and an outlet port B2 with a small opening area in the lower part. There is.

Furthermore, the inside of the case body 5 is divided into two by a partition wall 5b with respect to the inlet port B1, and an outlet port B2 is opened in one chamber B portion.

Both chambers B have thermistors K1 and K, respectively.
2 is placed.

The monitoring operation by both thermistors K1 and K2 is performed as follows.

Since the chamber B portion where the thermistor K2 is located is always filled with engine oil A, thermistor K2 is always filled with engine oil A.
I'm sinking inside.

On the other hand, the chamber B portion where the thermistor K1 is located is provided with the outlet B2, so if the amount of engine oil A is equal to or higher than the allowable lower limit, the engine oil A is placed in the chamber B portion. is satisfied, thermistor K1 can be submerged in engine oil A like thermistor K2, but if the amount of engine oil A is below the allowable lower limit, engine oil A is poured into this chamber B. is not stored, the thermistor K1 cannot maintain contact with the engine oil A.

Therefore, when the amount of engine oil A is above the allowable lower limit, both thyristors K1 and K2 will be in exactly the same state with respect to engine oil A, and their resistance values will also be exactly the same. , when the amount of engine oil A is below the allowable lower limit value, the state of the first thyristor K1 with respect to the engine oil A and the state of the second thyristor K2 with respect to the engine oil A are completely different. Both thyristors K1, K2
The resistance values that appear are completely different values.

By utilizing the fact that the resistance values of both thyristors K1 and K2 are different, for example, both thyristors K1 and K2
By configuring a Wheatstone bridge circuit with the thyristors K1 and K2 and a suitable fixed resistor, it is possible to output that the resistance values of the two thyristors K1 and K2 are different, and use this as an output for monitoring the amount of engine oil.

The embodiment shown in FIG. 3 shows a case where a pressure switch K3 is used as the detection object K, and the case 5 has an open top surface as an inlet port B1, an outlet port B2 at the lower end of the front wall, The rear wall 5e is a part to be assembled to the crankcase 2, and a split chamber 5c is formed separately from the chamber B formed by the main body of the case 5, and the inside of this split chamber 5c is divided into two by a diaphragm 5f. A pressure switch K3 is connected to one side of the divided chamber 5c, and the other side is connected to the inside of the chamber B through a through hole 5d.

The monitoring operation of the embodiment shown in FIG.
Since engine oil A is filled in the chamber B and the other of the divided compartments 5c, the engine 1
Fluctuations in the atmospheric pressure inside the crankcase 2 due to the up and down movement of the piston do not directly act on the diaphragm 5f, and therefore the pressure switch K3
The switch does not operate, but when the amount of engine oil A falls below the allowable lower limit and there is no more engine oil A in chamber B or the other of the divided chambers 5c, the crank will start to move as the piston of engine 1 moves up and down. Fluctuations in the atmospheric pressure within the case 2 act directly on the diaphragm 5f, thereby causing the pressure switch K3 to operate, and this switch operation enables a monitoring output to be produced.

The embodiment shown in FIG. 4 shows a case where a float switch K4 is used as the detection object K.
The main body of the case 5 has exactly the same structure as the embodiment shown in FIG. A float switch K4 is provided within this regulating cylinder 5g.

The regulating cylinder 5g is for preventing malfunction of the float switch K4 due to the tilting of the engine 1.

The monitoring operation of the embodiment shown in FIG. 4 is exactly the same as that of a normal float switch, and
When the amount of engine oil A in the engine becomes extremely low, a switch is activated and this is used as a monitoring output.

〔Effect of the invention〕

As described above, the present invention monitors the amount of engine oil A by using the scattering action of the engine oil A by the day part 4, so the amount of engine oil A can be monitored while the engine 1 is running. Therefore, all troubles in the engine 1 caused by a lack of engine oil A can be prevented.

In addition, since monitoring is performed using the scattered engine oil A, the monitoring operation will not become impossible even if the engine 1 is tilted significantly, and stable and reliable monitoring operation can be achieved at all times while the engine 1 is running. be able to.

Furthermore, since the chamber B is formed by the case 5 which is manufactured separately from the engine 1, there is no risk of complicating the structure of the crankcase 2 of the engine 1 and making its manufacture troublesome. In addition, the chamber B can be manufactured in a structure that can freely and fully function regardless of the manufacturing conditions of the crankcase 2, and since it is easy to attach and detach from the crankcase 2, it is easy to repair and change settings. It exhibits many excellent effects such as being easy to use.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway view showing the basic configuration of the present invention. FIG. 2 is an overall perspective view of a case forming a chamber when a thermistor is used as a detection object. FIG. 3 is a longitudinal sectional view of a case in which a pressure switch is used as a detection object. Fourth
The figure is a longitudinal sectional view of a case in which a float switch is used as a detection object. Explanation of symbols: 1; engine; 2; crankcase; 3; crankshaft; 4; date par; 5; case; A; engine oil; B; chamber; B1; inlet; B2; outlet; K; detection object.

Claims (1)

[Claims] 1. A mounting hole is drilled in the crankcase wall where the engine oil stirred by the dayper provided on the crankshaft is scattered, and the scattered oil can enter from the upper end and flow out from the lower end, and the spilled oil can be The amount of the intruding oil per unit time is larger than the amount of the intruding oil per unit time in a state where the amount of the engine oil is less than or equal to a set lower limit value, but the amount of the intruding oil per unit time is greater than the amount of the intruding oil in a state where the amount of the engine oil is not less than a set lower limit value. A case having a chamber configured to be smaller than the amount of engine oil is tightly attached and fixed to the crankcase with the chamber intruding into the crankcase from the mounting hole, and engine oil is contained in the chamber. An engine oil monitoring device that includes a detection element that detects accumulation.