JP3231579B2 - Engine lubricant supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating oil supply device suitable for a four-stroke engine in which new lubricating oil is supplied in accordance with the state of deterioration of lubricating oil in the engine.

[0002]

2. Description of the Related Art A lubricating device for a four-stroke engine stores lubricating oil in, for example, an oil pan, and sends the lubricating oil under pressure by an oil pump.
It is configured to supply oil to lubricated portions such as a camshaft journal portion and a valve operating mechanism. In order to continuously operate the engine for a long time when such a lubricating device is provided, it is necessary to replenish the oil pan with an amount of lubricating oil corresponding to the consumption of the lubricating oil.

[0003] As a lubricating oil supply device for an engine that supplies lubricating oil in accordance with such lubricating oil consumption,
Conventionally, as disclosed in, for example, JP-A-3-246310, the operating time of an engine is integrated, and lubricating oil is supplied to an oil pan every time the integrated operating time reaches a reference time. There is something.

[0004]

However, when lubricating oil is supplied in accordance with the engine operating time as in the above-mentioned conventional publication, there is a concern that the lubricating function of the engine cannot be maintained for a long time. That is, since the lubricating oil deteriorates depending on the number of operating hours and operating conditions of the engine, a method of merely replenishing the lubricating oil and maintaining a predetermined amount cannot cope with the deterioration of the lubricating oil quality, which may adversely affect the engine life. There is.

The present invention has been made in view of the above-mentioned conventional circumstances, and has as its object to provide a lubricating oil supply device for an engine that can maintain a lubricating function for a long time by suppressing deterioration in quality due to deterioration of lubricating oil. And

[0006]

According to a first aspect of the present invention, there is provided an engine load detecting means, an engine speed detecting means, and an engine speed is increased while correcting the engine speed to a larger value as the load increases in accordance with the engine load. Means for accumulating engine speed,
An oil supply means for replenishing the engine with lubricating oil when the integrated total engine speed reaches a preset reference integrated number, and the reference integrated number is determined by the type of fuel, the type of lubricating oil, or the number of times of lubricating oil replenishment And a reference integrated number correcting means for correcting based on at least one of the factors which influence the degree of deterioration of the lubricating oil or the degree of deterioration detected by the degree of deterioration detecting means. Oil supply control means for controlling the oil supply means so as to supply the lubricating oil when the number of accumulations is reached.

According to a second aspect of the present invention, there is provided an engine load detecting means, an engine speed detecting means, and an engine speed integrating means for correcting and integrating the engine speed to a larger value as the load increases in accordance with the engine load. Oil supply means for replenishing lubricating oil in the engine, oil discharging means for discharging residual lubricating oil in the engine, oil level detecting means for detecting the amount of lubricating oil in the engine, and an integrated total engine speed. When a predetermined reference integration number is reached, a first deterioration degree setting value and a number of lubricating oil replenishments set based on one or both of the type of fuel and the type of lubricating oil that affect the degree of deterioration of the lubricating oil The second deterioration degree set value and the first deterioration degree set value which are set to be larger as the number of times of lubricating oil replenishment are increased to be larger as the number of times of lubricating oil replenishment is increased. Deterioration arranged 4 deterioration degree detection value based on the detection means
Oil discharge control means for controlling the oil discharge means so that an amount of residual lubricating oil in the engine is discharged according to the degree of deterioration due to any one of the two values; Oil supply control means for controlling the oil supply means so that lubricating oil is supplied until the oil reaches the position.

According to a third aspect of the present invention, in the second aspect, the first deterioration degree setting value and the lubricating oil set based on one or both of the type of the fuel and the lubricating oil which affect the degree of deterioration of the lubricating oil. A third deterioration degree setting value obtained by correcting the second deterioration degree setting value and the first deterioration degree setting value that are set to be larger as the number of replenishment increases to a larger value as the number of lubrication oil replenishment times increases. A reference integration number for correcting the reference integration number to be smaller as the degree of deterioration is larger in accordance with the degree of deterioration due to any one of the four deterioration degree detection values based on the degree of deterioration detection means disposed so as to be in contact with the reference integration number. It is characterized by having a correction means.

[0009]

According to the present invention, lubricating oil is supplied into the engine when the total engine speed reaches the reference integrated number while correcting the engine speed according to the load. For example, the amount of lubricating oil consumption due to so-called oil rise, in which lubricating oil enters the combustion chamber and burns, is considered to depend on the total engine speed and engine load,
Lubricating oil can be replenished in an amount corresponding to lubricating oil consumption more accurately than when replenishing is performed only in accordance with the engine operating time of the conventional device.

The reference integrated number is corrected in accordance with the degree of deterioration of the lubricating oil. For example, the higher the degree of deterioration, the smaller the reference integrated number is corrected, so that the higher the degree of deterioration, the more frequently the lubricating oil is supplied. Since the quality deterioration due to the deterioration of the lubricating oil can be suppressed, the lubrication function can be maintained for a long time, and the durability of the engine can be improved.

According to the second aspect of the present invention, when supplying the lubricating oil, the residual lubricating oil in the engine is discharged according to the degree of deterioration,
After that, the new lubricating oil is replenished until the oil level reaches the upper limit position, so that the ratio of the new lubricating oil amount can be increased by the amount of forcibly draining the deteriorated lubricating oil, and the lubricating oil quality Can be kept in a stable state,
The lubrication function can be maintained for a longer time.

According to the third aspect of the invention, as the degree of deterioration increases, not only does the amount of lubricating oil exchange increase, but also the oil is exchanged earlier, so that the quality of the lubricating oil can be maintained in a stable state.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 to 6 are diagrams for explaining an engine lubricating oil supply device according to an embodiment of the present invention. FIG. 1 shows the overall configuration of an engine-driven air conditioner to which the embodiment device is applied. FIG. 2 is a schematic diagram showing a lubrication system of the engine of the embodiment, FIG. 3 is a system diagram showing a lubricating oil path of the embodiment, FIG. 4 is a block diagram of the embodiment, FIG. FIG. 6 is a map showing the degree of deterioration of the lubricating oil, and FIG. 7 is a flowchart for explaining the operation of the apparatus of this embodiment.

FIG. 1 is a diagram showing the entire configuration of the apparatus according to this embodiment.
, 1 is an engine-driven air conditioner, which is composed of an outdoor air conditioning unit 2 and an indoor air conditioning unit 3. The indoor air-conditioning unit 3 includes a refrigerant indoor heat exchanger 4, a decompression expansion valve 18, and a not-shown indoor heat exchange blower fan. The outdoor air-conditioning unit 2 includes an engine room 7 in which an engine 5, a compressor 6, 6, and the like are disposed, a main accumulator 8, a sub-accumulator 9, an electrical box 50, and a pipeline connecting each device. A piping chamber 10 is provided, and an outdoor heat exchange chamber 14 in which a refrigerant outdoor upper and lower heat exchangers 11 and 12 and an engine cooling water heat exchanger (hot water heat exchanger) 13 are disposed. I have.

The engine 5 is a water-cooled gas-fueled engine. An intake pipe 21a is connected to an intake port of the engine 5, and a gas mixer 21b and an air cleaner 21c are interposed in the intake pipe 21a. The tube 21a penetrates the top wall of the engine room 7 and the top wall of the outdoor heat exchange chamber 14 and opens to the outside.

The gas mixer 21b is connected to a supply pipe from an external gas fuel source in the terminal chamber 22 by a gas pipe 22d. A gas mixer 21 is connected to the gas line 22d.
b, a flow control valve 22a, a zero governor (reducing valve) 22b, and two solenoid valves 22c are interposed. The exhaust port of the engine 5 has an exhaust pipe 23a.
Is connected to the exhaust pipe 23a.
b, an exhaust silencer 23c, and a mist separator 23d are interposed, and the exhaust pipe 23a opens from the heat exchange chamber 14 to the outside. Reference numeral 24a denotes an oil tank for storing lubricating oil. When the amount of lubricating oil in the oil pan 5b decreases, the solenoid valve 24b is opened by a lubricating oil supply device described later, and lubricating oil is supplied by gravity. I have.

The output shaft of the engine 5 has a clutch 6a,
The compressors 6, 6 are connected via 6a. The discharge port of the compressor 6 is connected to the refrigerant outdoor upper and lower heat exchangers 11 and 12 through the refrigerant pipes 200 and 16a, the four-way valve 15 switched to the cooling operation position, and the refrigerant pipe 16a. The two heat exchangers 11 and 12 are connected to the refrigerant line 17a from the refrigerant indoor heat exchanger 4 in the terminal room 22 through the refrigerant line 16c, the heat exchanger in the main accumulator 8, and the refrigerant line 101. 101a.
Reference numeral 102 denotes a dryer, and reference numeral 103 denotes a filter that bypasses the dryer.

The refrigerant line 17b from the indoor heat exchanger 4 is connected to the refrigerant line 100 from the outdoor unit 2 in the terminal room 22 by a joint 100a. The refrigerant line 100 includes a four-way valve 15, a refrigerant line 16d,
The compressors 6, 6 are connected via the main accumulator 8, the refrigerant line 202, the sub-accumulator 9, and the refrigerant line 201.
Connected to the suction port. Note that 300 and 301 are capillary tubes, and 210 and 211 are each a combination of a temperature detector and a capillary tube, and are for detecting the cooling temperature and detecting the level of the liquid-phase refrigerant in the accumulator 8. It is. 302 is an on-off valve, 303
Reference numeral denotes an oil discharge passage. When the amount of oil accumulated in the lower part of the accumulator increases, the opening and closing valve is opened manually or automatically so that oil flows from the accumulator 8 to the sub-accumulator 9.

An oil separator 19a for separating the lubricating oil in the refrigerant is interposed between the refrigerant pipes 200 and 16a, and when the amount of the lubricating oil separated by the separator 19a exceeds a predetermined value. The oil is returned to the main accumulator 8 via an oil strainer 19b and a solenoid valve 19c which opens when the oil pressure exceeds the predetermined value. The lubricating oil is also returned to the sub accumulator 9. The refrigerant line 16a is connected to the main accumulator 8 via an oil strainer 20a and a solenoid valve 20b which opens when the pressure in the line is equal to or higher than a predetermined value, thereby avoiding an abnormal increase in refrigerant line pressure.

The cooling jacket 28 of the engine 5
b, when the cooling water temperature is equal to or lower than a predetermined value, the cooling water pump 28a, the water pipe 29a, and the cooling jacket 28
b, water line 29a ', switching valve (thermostat valve)
A cooling jacket circulating circuit (engine cooling water circulating circuit), which is one of low-temperature circulating circuits for circulating cooling water through the path of 28c and the water pipe line 29s, is configured.

When the cooling water temperature exceeds a predetermined value,
Cooling water pump 28e, water line 29e, exhaust gas heat exchanger 23b, water line 29e ', cooling water pump 28a, water line 29a, cooling jacket 28b, water line 29a', switching valve 28c, water line 29b, three-way valve 28d. , Water pipe 2
9c, heat exchanger 13 for cooling water, water pipes 29d, 29p,
A high-temperature circulation circuit that circulates cooling water through the path of the cooling water pump 28e is configured. The switching valve 28c
Is switched to the low temperature circulation position, the cooling water from the cooling water pump 28e flows in the direction of the water pipe 29b through the bypass passage 29r. That is, an exhaust gas heat exchanger circulation circuit, which is another low temperature circulation circuit, is configured. As a result, the exhaust heat of the exhaust gas heat exchanger 23b is discarded by the cooling water heat exchanger 13 through the three-way valve 28d, or is supplied to the refrigerant by the heater 29g of the accumulator 8. As a result, the exhaust heat can be used even during warm-up at the time of starting, and this is effective particularly when a quick start-up of heating is required.

In the above-mentioned cooling system, reference numeral 30a denotes a cooling water reservoir tank, which comprises a water pipe 30c and an inlet 30.
b, it is connected to the cooling water heat exchanger 13. An inlet (not shown) is arranged at an upper portion of the cooling water reservoir tank 30a independently of the inlet 30b, and a switching valve 28c is provided at the inlet 30b.
(See A → A in FIG. 1). The port is connected to a cooling water jacket 28b through a throttle.
, Which allows the air to escape from the cooling jacket circuit. When the three-way valve 28d is switched, the engine cooling water is supplied to the heater 29g in the main accumulator 8 through the water pipe 29d, thereby supplying heat to the refrigerant. 90 is a solenoid valve,
Reference numeral 89 denotes an oil strainer which opens the solenoid valve 90 when the load on the indoor unit 4 during cooling becomes particularly small, and allows the refrigerant to bypass the indoor unit 4 and flow to the accumulator 8 so as to balance the load. ing.

The casing 31 of the outdoor unit 2 is
It has a schematic structure in which columns are erected at four corners of a floor panel (not shown), the upper ends of the columns are connected by ceiling beams, and the left, right, and ceiling surfaces are detachably covered by side panels and ceiling panels, respectively. The front and rear side surfaces of the casing 31 are open air introduction openings, and wire meshes 38a and 38b functioning as filters are detachably attached to the openings. A discharge opening 37f for discharging the introduced outside air to the outside is formed in the ceiling surface. The outside air is sucked into the outdoor heat exchanger 14 from the wire meshes 38a and 38b at the discharge opening 37f. An outdoor heat exchange blower fan 44 that discharges air above the outdoor heat exchanger 14 is provided.

The outdoor heat exchange chamber 14, the engine room 7, and the piping room 10 are each defined by a partition plate 39.
The central partition plate constituting the ceiling of the engine room 7 is provided with a ventilation air outlet 40b so as to open into the outdoor heat exchange chamber 14.
It is formed in the place. The outlet 40b is surrounded by a sound deadening box 40c having a sponge-shaped sound absorbing sheet adhered to the inside. A box-shaped air introduction chamber 4 defined by a partition plate is provided between the engine room 7 and the piping room 10.
A large number of ejection ports 45a for blowing out ventilation air into the engine room 7 are formed on the partition plate between the air introduction chamber 46 and the engine room 7 so as to be substantially uniformly arranged over the entire surface. . An engine room air intake 46a is formed in a partition plate between the air introduction chamber 46 and the piping chamber 10, and a ventilation fan 47 is provided in the intake 46a.

Various control devices, which will be described later, are housed and arranged in the electrical equipment box 50.
An air inlet 50a is formed on the bottom surface of the zero, and an exhaust port 50b is formed on the upper side surface. The floor plate of the casing 31 is provided with an outside air inlet 33b.
The outside air having passed through b is introduced into the piping chamber 10, and a part of the air is discharged from the air inlet 50 a through the electrical box 50 through the outlet 50 b to ventilate the box 50.

As shown in FIG. 2, the engine 5 of this embodiment is a water-cooled parallel four-cylinder OHV engine using city gas, propane gas or the like as a fuel, and an oil pan 5b is fastened to the lower mating surface of the cylinder block 5a. A cylinder head 5c is fastened to the upper mating surface, and a head cover 5d is attached to the cylinder head 5c. The cylinder head 5c is fixed on a floor plate in the casing 31 via an engine mount made of an elastic body (not shown). I have. A piston 5 slidably inserted into a cylinder bore of the cylinder block 5a.
e is connected to a crankshaft 5g by a connecting rod 5f, and a valve train 5h is arranged in the cylinder head 5c. The valve train 5h includes an intake valve 5i, an exhaust valve 5
i is opened and closed by a camshaft 51 disposed near the crankshaft 5g via a rocker arm 5j and a push rod 5k.

The lubrication system of the engine 5 is shown in FIGS.
As shown in FIG.
The internal lubricating oil is sucked up through an oil strainer 61b, fed through an oil filter 62 to a main gallery 63 arranged at the center of the camshaft, and distributed therefrom to lubricated parts in various parts of the engine. I have. Reference numeral 61a denotes a relief valve for maintaining the discharge pressure of the oil pump 61 at a predetermined value or less, and 62b is built in the oil filter 62, and bypasses the lubricating oil when the passage pressure of the filter 62 exceeds the predetermined value. The relief valve 63a is a main gallery 63 and an oil filter 6
It is an oil passage connecting two.

The lubrication system includes the main gallery 63
To the journal 64 of the camshaft 5l, the journal 65 of the crankshaft 5g, and the large end 66 of the connecting rod 5f and return to the oil pan 5b, and from the main gallery 63 through the oil passage 5t. Oil is supplied to each valve train 5h of each cylinder head 5c, and an oil pan 5b
A second lubrication system B and an output take-out shaft (PTO) disposed in the middle gear case m from the oil filter 62.
And a third lubrication system C for supplying lubricating oil dropped to the bottom of the gear case m to the inside of the oil pan 5b. Each head cover 5
The breather chamber 5m formed in the oil pan 5b is connected to an oil separator 76 through a breather passage 69, and the lubricating oil separated by the oil separator 76 passes through an oil return hose 80 into the oil pan 5b. Is returned to.

The oil pan 5b is connected to the engine 5 via oil hoses 24c and 24d as oiling means.
An oil tank 24a is provided separately from the oil pan 5b and located at a higher position than the oil level of the oil pan 5b. An electromagnetic valve 24b is provided in the middle of the oil hoses 24c and 24d. When the solenoid valve 24b is opened, lubricating oil is supplied into the oil pan 5b by its own weight.

An oil drain hose 70a provided with a solenoid valve 70 on the way is connected to the bottom wall of the oil pan 5b as oil drain means. The pan 5b is inserted into the waste oil tank 71 arranged at a low place by the bottom wall. When the solenoid valve 70 is opened, the lubricating oil is discharged into the waste oil tank 71 by its own weight. Here, the oil pan 5 is used as the oil draining means.
The oil drain pipe 72 may be inserted into the b, and the oil drain pipe 72 may be forcibly discharged to the waste oil tank 74 via the oil drain pump 73.

The present embodiment is provided with a lubricating oil supply device for automatically supplying an amount of lubricating oil to the oil pan 5b according to the amount of lubricating oil consumed and the degree of deterioration of the lubricating oil. As shown in FIG. 4, the lubricating oil supply device includes an engine speed detecting sensor 91a, an oil level detecting sensor 91b for detecting a lubricating oil level in an oil pan, a load detecting sensor 91c, and an oil deterioration degree detecting sensor. 91d and the detection values from the sensors 91a to 91d are input, and the electromagnetic valve 24b as the oil supply means and the electromagnetic valve 7 as the oil discharge means
And an ECU 92 for controlling the opening / closing timing of the zero. Note that, specifically, one or a plurality of sensors for detecting the throttle opening, the fuel supply amount, and the boost pressure are employed as the load detection sensor 91c.

The ECU 92 calculates the engine speed from the engine speed detection sensor 91a by using the load detection sensor 9a.
1c, an engine speed integrating means 92a for accumulating while correcting according to the detected load, a memory 92b for storing the integrated total engine speed, and a reference integrated number for the integrated total engine speed. When the solenoid valve 24b is opened and closed so that the reference supply amount is supplied when
Oil supply / drainage control means 92c that controls the opening and closing of the solenoid valve 70 so that the residual lubricating oil in the engine is discharged by an amount corresponding to the degree of oil deterioration, and the reference integrated number is determined according to a factor that affects the degree of deterioration of the lubricating oil. And a reference integrated number correcting means 92e for performing correction.

The reference integrated number correcting means 92e is provided in FIG.
As shown in FIG. 6, a deterioration map value indicating a change in the base number of the lubricating oil according to the type of the fuel gas A, B and the lubricating oil A, B of the engine is input via the correction coefficient memory 92i. The degree of deterioration of the lubricating oil is determined based on each map value and the number of replenishments Tn from the memory 92f that stores the number of replenishments, and the reference integrated number is corrected to a smaller value as the degree of deterioration increases. Note that the degree of deterioration is not a detection value actually measured and detected, but a set value obtained in a preliminary test and input to the memory. In this case, the oil type and the fuel gas type from the oil type selection key 91e and the fuel gas type selection key 91f are input to the reference integrated number correction means 92e. The gas A indicates city gas, propane gas, etc., and the gas B indicates low calorie city gas, butane gas, etc.

The oil supply / discharge control means 92c reads the amount of residual lubricating oil in the engine from the oil level detection sensor 91b and the degree of deterioration of the lubricating oil from the oil deterioration detection sensor 91d, and adjusts the degree of deterioration to a preset degree of deterioration. While controlling the opening and closing of the oil discharge solenoid valve 70 so as to discharge a corresponding amount of oil,
After the oil is drained, the supply solenoid valve 24b is controlled to open and close until the oil level detection sensor 91b reaches the upper limit. Here, the lubricating oil replenishing amount may be obtained by the time until the oil level reaches the upper limit position during the lubricating oil replenishing, and the next replenishing timing may be controlled from the replenishing amount. Can eliminate the need for an oil level detection sensor.

The ECU 92 includes an engine operating time integrating means 92g and a memory 92h for storing the integrated total operating time, so that the replenishment timing is advanced according to the total operating time. Have been. For example, deterioration can be effectively suppressed by gradually shortening the replenishment interval, such as every 500 hours from 0 to 2000 hours and every 300 hours from 2000 to 4000 hours.

Next, the operation and effect of this embodiment will be described. In the air-conditioning apparatus 1 of the present embodiment, the four-way valve 13 is switched to the outdoor heat exchanger side during the cooling operation. The high-temperature, high-pressure refrigerant gas compressed by the compressors 6, 6 is supplied to the refrigerant outdoor heat exchangers 11, 12 via the refrigerant line 16a, the four-way valve 15, and the refrigerant line 16b. It is cooled by outside air and liquefied. The liquefied high-pressure refrigerant liquid passes through the main accumulator 8 through the refrigerant line 16c, and is decompressed by the expansion valve 18 in the refrigerant line 17a. The decompressed low-pressure refrigerant liquid evaporates by removing heat from the indoor air in the indoor heat exchanger 4, and the evaporated heat causes a cooling effect to cool the room.

At the time of heating, the four-way valve 15 is switched to the indoor heat exchanger side, and the high-temperature, high-pressure refrigerant gas from the compressed air 6, 6 is transmitted to the indoor heat exchanger 4 via the refrigerant pipes 16a, 17a. The air is supplied and cooled by the room air to be liquefied. In this case, the heat of condensation heats the room air to obtain a heating effect.

Next, the basic operation of the lubricating oil supply device of this embodiment will be described with reference to the flowchart of FIG. First,
The reference integrated number to be supplied with the lubricating oil is read (step 1). The integrated number in this case means the total number of engine rotations integrated while correcting the engine rotation number according to the engine load. Subsequently, the fuel gas type, the lubricating oil type, and the number of replenishments are read as factors that cause the degree of deterioration of the lubricating oil to be left and right (steps S2 and S3). Required (step S
4). In this case, for example, as shown in FIG. 5, when the previous number of replenishments is one, if the correction integration number is gas A (T ₂
'-T ₁ '), whereas gas B has a smaller value, such as (T ₂ -T ₁ ).
Further, as shown in FIG. 6, the correction integrated number is larger in the case of oil A than in the case of oil B.

Next, when the total number of accumulated engines after the previous replenishment has reached the above-mentioned corrected accumulated number, the amount of oil discharged according to the degree of oil deterioration or the oil deterioration factor is set as the opening time T of the oil discharge solenoid valve. (Steps S5 and S6), and the oil drain solenoid valve 70 is opened during the opening time T (Steps S7 to S6).
9). As a result, an amount of residual lubricating oil in the engine corresponding to the degree of deterioration is discharged.

The oil supply solenoid valve 24b is opened until the oil level detection sensor 91b is turned on, that is, until the amount of lubricating oil in the engine reaches the reference amount (steps S10 to S10).
12) This completes the supply of the lubricating oil.

As described above, according to the present embodiment, the reference integrated number to be replenished with the lubricating oil is corrected based on the factors affecting the degree of deterioration of the lubricating oil, and the engine speed is corrected according to the load. Lubricating oil is replenished when the accumulated number reaches the above-mentioned corrected accumulated number, so that quality deterioration due to deterioration of the lubricating oil can be suppressed and the lubrication function can be maintained for a long time, and the engine life is improved accordingly. it can.

When replenishing the above lubricating oil, the residual lubricating oil in the engine is drained and new lubricating oil is replenished to the upper limit position of the oil level. Can stabilize the quality of lubricating oil for a long time,
Engine life can be further improved.

In the above embodiment, the replenishment timing is determined based on the total number of engine revolutions. However, an oil level detection sensor capable of detecting the oil level itself is provided, and the consumption is obtained from the detected value. Sensor 91a,
The replenishment timing may be determined based on the engine operating state from 91c. In such a case, the replenishment interval when the oil consumption is large can be advanced.

In this case, a drain valve is further provided, and when the oil consumption is less than the reference value, forced drainage is performed to the reference level, and thereafter, an amount of lubricating oil corresponding to the drain amount is supplied. In this case, the deterioration of the lubricating oil when the consumption is small can be avoided.

Further, an optical oil deterioration degree detection sensor is provided, and when the oil deterioration degree from the sensor has reached a set value, oil is discharged even if the total engine speed does not reach the reference integrated speed. Replenishment may be performed.
As this deterioration degree detection sensor, there is an optical type that detects the deterioration state from the transmittance of a specific light wavelength, and by using this sensor together, it is possible to perform replenishment at an optimum timing when the deterioration is rapid. For example, this is effective when the amount of blow-by gas is rapidly increased due to deterioration of the engine with time or operating conditions, or when the refrigerant is rapidly deteriorated due to sucking of a refrigerant or the like. Also, depending on the type of fuel gas and the conditions under which it is used, the deterioration of the lubricating oil may be accelerated. For example, in the case of low-calorie gas, the maintenance time is usually set to half that of propane or city gas. Since there are many kinds of low calorie gases, there is a great difference in deterioration rate, and this is effective in such a case.

In FIG. 4, a total engine speed memory 92 is shown.
Two types of b are stored in b, that is, the cumulative total of the engine speed corrected in accordance with the load, and the total engine speed that is set to 0 and integrated again each time oil refilling or oil replenishment with draining is performed. . In this control, the accumulated value is used as the total engine speed, and a plurality of values, for example, 6 million rotations, 12 million rotations, 18 million rotations, etc., are stored as the reference integrated number before correction, and these values are corrected. Each time the value exceeds the cumulative total engine speed, replenishment or replenishment with draining is performed. As another control method, the total engine speed, which is set to 0 every time oil replenishment or oil replenishment is performed, is changed to a value that is corrected according to the degree of deterioration and the number of replenishments based on one reference integrated number before correction. Replenishment or replenishment accompanied by oil drainage may be performed each time it exceeds. As the number of replenishments increases, the degree of deterioration of the lubricating oil remaining before replenishment increases, so correction is made so that the reference integrated number decreases.

Here, in the replenishment or replenishment accompanied by the drainage, the replenishment amount or the drainage amount and the replenishment amount may be constant. The oil amount and the supply amount may be increased. This makes it possible to more reliably prevent deterioration in the quality of the lubricating oil.

Further, as another control method, the reference integrated number itself is not corrected, but is always kept constant, and the amount of oil discharged is increased according to one or both of the degree of deterioration and the number of replenishments. May be more.

[0049]

As described above, according to the first aspect of the present invention,
The total number of engine revolutions integrated while correcting the engine speed according to the load is corrected based on factors that affect the degree of deterioration such as the type of fuel, the type of lubricating oil, or the number of times of lubricating oil replenishment. Since the lubricating oil is replenished when the corrected integrated number has been reached, the lubrication function can be maintained for a long time by suppressing the quality deterioration due to the deterioration of the lubricating oil.

According to the second aspect of the present invention, after discharging the residual lubricating oil in an amount corresponding to the degree of deterioration of the lubricating oil, the lubricating oil is supplied until the oil level reaches the upper limit position. By increasing the ratio, the quality can be maintained for a longer period.

According to the third aspect of the present invention, the greater the degree of deterioration, the more the amount of lubricating oil exchange increases, and the earlier the exchange is performed, so that the lubricating oil quality can be maintained in a more stable state. is there.

[Brief description of the drawings]

FIG. 1 is a system diagram showing an overall configuration of an engine-driven air conditioner according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a lubrication system of the engine of the embodiment.

FIG. 3 is a system diagram showing a lubricating oil path of the engine of the embodiment.

FIG. 4 is a block diagram of a lubricating oil control device of the embodiment device.

FIG. 5 is a map diagram showing the degree of deterioration of lubricating oil in the apparatus of the embodiment.

FIG. 6 is a map diagram showing a degree of deterioration of lubricating oil in the apparatus of the embodiment.

FIG. 7 is a flowchart for explaining the operation of the apparatus in the embodiment.

[Explanation of symbols]

 5 Engine 24b Solenoid valve (oil supply means) 70 Solenoid valve (oil discharge means) 73 Oil discharge pump (oil discharge means) 91a Engine speed detection means 91b Oil level detection means 92a Engine speed integration means 92c Oil supply / oil discharge control means 92e Reference integrated number correction means

Continuation of the front page (56) References JP-A-56-47615 (JP, A) JP-A-3-49311 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F01M 11 / 10 F01M 11/06

Claims (3)

(57) [Claims] An engine load detecting means, an engine speed detecting means, an engine speed integrating means for correcting the engine speed to a larger value as the load increases in accordance with the engine load, and integrating the engine speed. An oil supply means for supplying lubricating oil into the engine when the total engine speed reaches a preset reference cumulative number;
Reference integrated number correction means for correcting based on at least one of the factors affecting the degree of deterioration of the lubricating oil such as the type of lubricating oil or the number of times of lubricating oil replenishment or the degree of deterioration detected by the degree of deterioration detecting means; An oil supply control device for an engine, comprising: an oil supply control unit that controls the oil supply unit so that the oil supply is performed when the integrated engine speed reaches the corrected integrated number. 2. A engine load detecting means, and engine speed detecting means, and the engine speed integrating means load according to the engine load is accumulated while correcting the engine speed enough large a large value, in the engine Oil supply means for replenishing lubricating oil, oil discharging means for discharging residual lubricating oil in the engine, oil level detecting means for detecting the amount of lubricating oil in the engine, and an integrated total engine speed are preset.
When the reference cumulative number is reached, the first deterioration degree setting value set based on one or both of the type of fuel and the type of lubricating oil that determines the degree of deterioration of lubricating oil, the larger the number of times of lubricating oil replenishment, the larger the value. The third set value in which the set second deterioration degree and the first set value of deterioration are corrected to larger values as the number of lubricating oil replenishments increases.
The amount of residual lubricating oil in the engine corresponding to the degree of deterioration due to any one of the four deterioration degree detection values based on the deterioration degree setting value and the deterioration degree detection means arranged to be in contact with the lubricating oil is determined.
And oil discharge control means for controlling said oil discharge means to be discharged, the oil supply control means for the oil level after the oil discharge by exhaust oil means for controlling said refueling means so that the lubricating oil to reach the upper limit position is supplied A lubricating oil supply device for an engine, comprising: 3. The first deterioration degree setting value and the number of times of lubricating oil replenishment set based on one or both of the type of fuel and the type of lubricating oil that affect the degree of deterioration of the lubricating oil according to claim 2. A third deterioration degree setting value obtained by correcting the second deterioration degree setting value and the first deterioration degree setting value that are set to be larger as the number of times of lubricating oil replenishment is increased, and arranged to be in contact with the lubricating oil A reference integration number correction means for correcting the reference integration number to be smaller as the degree of deterioration is larger, in accordance with the degree of deterioration of any of the four detected values of the deterioration degree based on the obtained degree of deterioration detection means. A lubricating oil supply device for an engine, comprising: