JP3474642B2 - Oil filter arrangement structure for engine lubrication system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil filter arrangement structure for an engine lubrication system in which lubricating oil from an oil pump is supplied to each lubricated portion of an engine through an oil filter.

[0002]

2. Description of the Related Art Generally, an engine lubrication system sucks a lubricating oil filled in an oil pan with an oil pump, filters it with an oil filter, and then pumps it to a main gallery, where it is used to rotate and slide the engine. It is configured to be distributed and supplied to the oil pan and then collected in the oil pan. The oil filter is generally arranged in the oil passage from the oil pump to the main gallery.

[0003]

By the way, depending on the arrangement position of the oil filter, the lubricating oil in the oil filter flows back from the oil pump to the oil pan when the engine is stopped. The lubricating oil in the oil filter may come off completely. As a result, the startup of the lubricating system at the time of engine startup after being left for a long time is delayed by the time until the lubricating oil is filled in the oil filter, which may adversely affect the lubricity.

Further, the above oil filter requires periodical inspection and maintenance, replacement of the element after a certain period of use, and the like, and the required installation space becomes large depending on the mounting direction. Therefore, it is required to increase the degree of freedom in the mounting position and mounting direction of the oil filter.

The present invention has been made in view of the above circumstances, and an engine lubricating device capable of preventing the lubricating oil from escaping, speeding up the startup of the lubricating system at the time of starting the engine, and improving the degree of freedom with respect to the mounting position and the like. The purpose of the present invention is to provide an oil filter arrangement structure.

[0006]

According to a first aspect of the present invention, an oil for an engine lubrication apparatus is configured so that lubricating oil from an oil pump is supplied to each lubricated portion of an engine through an oil filter that is removable. In the filter arrangement structure,
The engine is placed in the engine room and the exhaust port of the engine is placed.
Exhaust gas heat exchanger is connected to the
Is disposed below the exhaust gas heat exchanger, further below the discharge port of the oil pump, and below the lubricating oil inlet of the engine.
When the front plate that forms the chamber is removed, the oil filter
The feature is that it is exposed to the outside .

The invention of claim 2 is characterized in that the oil filter is detachably attached to the engine through a bracket.

[0008]

According to the oil filter arrangement structure of the first aspect of the invention, since the oil filter is arranged below the discharge port of the oil pump and below the lubricating oil inlet of the engine, the oil filter is arranged even when the engine is stopped. Lubricating oil can always be stored inside, and will not come out even if the engine is stopped for a long time. Therefore, even when the engine is restarted after being stopped for a long period of time, the time until the oil filter is filled with the lubricating oil becomes unnecessary, and the startup of the lubricating system can be speeded up accordingly.

According to the second aspect of the invention, the oil filter is detachably attached to the engine through the bracket.
By properly setting the shape of the bracket, the mounting position and mounting direction of the oil filter can be freely selected. As a result, the height relationship with the pump discharge port and the lubricating oil surface can be freely set, workability at the time of replacement and maintenance can be improved, and further downsizing can be achieved.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 16 are views for explaining an oil filter arrangement structure of an engine-driven air conditioner according to an embodiment of the present invention, and FIGS. 1 to 4 are engine drives to which the structure of the present embodiment is applied. Type air conditioner front view,
Rear view, right side view (sectional view taken along the line III-III in FIG. 2), left side view (sectional view taken along the line IV-IV in FIG. 2), FIG. 5 is a schematic plan view of the floor of the outdoor heat exchange chamber, FIG. Is a schematic cross-sectional plan view of an engine room and a piping room, FIG. 7 is an overall configuration diagram of the apparatus of the above embodiment, and FIGS.
Is a sectional right side view of the engine, FIGS. 10 and 11 are left side views and rear views of the engine, FIG. 12 is a schematic plan view of the engine of the above embodiment, FIG. 13 is a partial sectional plan view of the transmission, and FIG.
4, FIG. 15 is a left and right side view of the transmission, FIG. 16 is a sectional development view showing the flow of lubricating oil, and FIG. 17 is a system diagram of the lubrication control device.

FIG. 7 is a diagram showing the overall construction of the apparatus of this embodiment.
In FIG. 1, 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 an indoor heat exchanger for refrigerant 4, an expansion valve 18 for decompression, and an indoor heat exchange blower fan (not shown). The outdoor air-conditioning unit 2 includes an engine room 7 in which an engine 5, a pair of compressors 6, 6 and the like are arranged, a main accumulator 8, a sub accumulator 9, an electrical equipment box 50, and a pipe line connecting each device. And a piping chamber 10 in which the
An outdoor heat exchange chamber 14 in which lower heat exchangers 11 and 12 and an engine cooling heat exchanger (hot water heat exchanger) 13 are arranged.
It has and.

The engine 5 is a water-cooled gas fuel 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 provided in the intake pipe 21a. The pipe 21a penetrates through the ceiling walls of the engine room 7 and 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 installed in the gas line 22d.
A flow control valve 22a integrated with b, a zero governor (pressure reducing valve) 22b, and two electromagnetic valves 22c are interposed. The exhaust port of the engine 5 has an exhaust pipe 23a.
Is connected to the exhaust pipe 23a, and the exhaust gas heat exchanger 23 is connected to the exhaust pipe 23a.
b, an exhaust silencer 23c, and a mist separator 23d are interposed, and the exhaust pipe 23a is open to the outside of the heat exchange chamber 14.

The output shaft of the engine 5 has a transmission 92,
The compressors 6 and 6 are connected via the clutches 6a and 6a. The discharge port of the compressor 6 has refrigerant lines 200, 16
a, the four-way valve 15 switched to the cooling operation position, and the refrigerant upper and lower outdoor heat exchangers 1 via the refrigerant pipe 16b
1, 12 are connected to the heat exchangers 11 and 12 from the indoor heat exchanger 4 for refrigerant in the terminal chamber 22 via the refrigerant pipe 16c, the heat exchanger in the main accumulator 8 and the refrigerant pipe 101. Is connected to the refrigerant pipe line 17a by a joint 101a. In addition, 102 is a dryer and 103 is a filter which bypasses this.

The refrigerant line 17b from the indoor heat exchanger 4 is connected to the refrigerant line 100 from the outdoor unit in the terminal chamber 22 by a joint 100a.
The refrigerant pipe 100 is connected to the suction ports of the compressors 6, 6 through the four-way valve 15, the refrigerant pipe 16d, the main accumulator 8, the refrigerant pipe 202, the sub accumulator 9, and the refrigerant pipe 201. In addition, 300 and 301 are capillaries, 210 and 210 are each a combination of a temperature detector and a capillary, and are for detecting the level of the liquid phase refrigerant in the accumulator 8 by detecting the cooling temperature. is there. Further, 302 is an opening / closing valve, and 303 is an oil discharge passage, and when the amount of oil accumulated in the lower portion of the accumulator increases, the opening / closing valve is opened manually or automatically so that the oil flows from the main accumulator 8 to the sub accumulator 9.

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

The cooling jacket 28 of the engine 5 is also provided.
Regarding the cooling of b, when the cooling water temperature is below a predetermined value, the cooling water pump 28a, the water pipe 29a, the cooling jacket 28
b, water pipe 29a ', switching valve (thermostat valve)
A cooling jacket circulation circuit (engine cooling water circulation circuit), which is one of the low-temperature circulation circuits that circulates the cooling water in the route of 28c and the water pipe 29s, is configured.

When the cooling water temperature exceeds a predetermined value,
Cooling water pump 28e, water conduit 29e, exhaust gas heat exchanger 23b, water conduit 29e ', cooling water pump 28a, water conduit 29a, cooling jacket 28b, water conduit 29a', switching valve 28c, water conduit 29b, three-way valve 28d. , Water pipeline 2
9c, heat exchanger 13 for cooling water, water pipes 29d, 29p,
A high temperature circulation circuit that circulates the cooling water is configured through the cooling water pump 28e. The switching valve 28
When c is switched to the low temperature circulation position, the cooling water from the cooling water pump 28e flows in the direction of the water pipeline 29b through the bypass passage 29r. That is, the 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 passes through the three-way valve 28d and is discarded by the cooling water heat exchanger 13, or is given to the refrigerant by the heater 29g of the main accumulator 8. As a result, the exhaust heat can be used even during warm-up at the time of start-up, which is particularly effective when it is necessary to quickly start the heating or when the water temperature does not easily rise.

In the above cooling system, 30a is a reservoir tank for cooling water, which is a water pipe 30c and an inlet 30.
It is connected to the heat exchanger 13 for cooling water via b. When the three-way valve 28d is switched, the engine cooling water is supplied to the heater 29g in the main accumulator 8 by the water conduit 29d, thereby supplying heat to the refrigerant. Reference numeral 90 is an electromagnetic valve, and 89 is an oil strainer. When the load on the indoor unit 4 during cooling is particularly small, the electromagnetic valve 90 opens to allow the refrigerant to bypass the indoor unit 4 and flow to the main accumulator 8. I try to balance it with.

Next, a specific structure of the outdoor air conditioning unit 2 will be described with reference to FIGS. The casing 31 of the outdoor air conditioning unit 2 has a floorboard 3 on a pair of bases 32.
3 is placed and fixed, and columns 34 are erected at four corners,
The upper ends of the four columns 34 are connected to the right side surface and the left side surface by one ceiling beam (not shown), and the front and rear ends of the floor plate 33 are bent to form a floor beam 33a. The entire left and right side surfaces of the casing 31 are covered with left and right side plates 37c and 37d, and the ceiling surface is a ceiling plate 37e.
Is covered with. Further, lower portions of the front and rear side surfaces of the casing 31 are covered with front and rear side plates 37a and 37b. The front, rear, left, and right side plates 37a to 37d are detachable so as to ensure maintainability of each device.

The front plate 37a and the rear plate 37b on the front and rear side surfaces of the casing 31 are provided with outside air introduction openings, and wire meshes 38a, 38b functioning as filters are provided in the respective horizontal frames 36a, 36b. 36b are detachably attached to the top and bottom of each. A discharge opening 37f for discharging the introduced outside air upward is formed in the ceiling plate 37e, and the outside air is discharged through the discharge opening 37f.
An outdoor heat exchange blower fan 44 is provided which sucks air from the portions 8a and 38b into the outdoor heat exchange chamber 14 and discharges it above the heat exchange chamber 14. Reference numeral 38c is a wire mesh erected around the discharge opening 37f.

The inside of the casing 31 is divided into an outdoor heat exchange chamber 14, an engine room 7, and a piping chamber 10 by a partition plate 39, and the partition plate 39 forms a central partition forming the ceiling of the engine room 7. Board 40 and engine room side partition board 41
a, 41b and piping chamber side partition plates 42a, 42b that constitute the ceiling of the piping chamber 10. The engine room side partition plates 41a and 41b and the piping room side partition plate 42
The a and 42b are detachable upward. In addition, at the time of removal, by removing the front and rear side plates 37a, 37b,
The engine room 7 is open at the ceiling side, the front side, and both corners, and the piping room 10 is opened at the ceiling side, the rear side, and both corners, so that the maintenance work of the equipment in each room is easy.

At the boundary between the central partition plate 40 and the piping chamber side partition plates 42a and 42b, and on the outer upper side (upper side of the piping chamber 10 side) of the rear middle plate 44a which constitutes the rear side wall of the engine room 7. A gutter 48 (drainage passage) is disposed so that it can be disassembled from the central and piping chamber side partition plates 40, 42a, 42b, that is, it can be replaced with a new one. The gutter 48 is a groove-like member extending in the longitudinal direction of the outdoor air-conditioning unit 2 (left-right direction in FIG. 2), that is, in the direction of the arrangement surface of the heat exchanger, and becomes lower toward the right side (right side in FIGS. 2 and 5). It is inclined.
The high end 48b located at the highest position of the gutter 48 can be exposed to the outside by removing the right side plate 37d or by providing an opening (cleaning hole).

A tubular vertical gutter (drainage pipe) 43 can be disassembled at the lower end 48a located at the lowest position of the horizontal gutter 48.
And it is connected so that it can be replaced with a new one. The vertical gutter 43 extends downward at a corner portion formed by the inner surface of the left side plate 37c and the outer surface of the rear middle plate 44a of the engine room 7, and the drain port 43a opening at the lower end thereof is located below the floor plate 33. And is facing outward.

The engine room side partition plates 41a, 41b, the piping room side partition plates 42a, 42b, and the central partition plate 40.
Is inclined so that it becomes lower toward the gutter 48 side.
Therefore, rainwater and the like that have entered the outdoor heat exchanger 14 are immediately collected in the lateral gutter 48, and are discharged to the outside through the vertical gutter 43. Further, due to the above inclination, the engine room side partition plates 41a, 4
1b and the outer ends of the piping chamber side partition plates 42a, 42b are higher, and the openings for inspecting and maintaining the inside by removing the front and rear side plates 37a, 37b are large.

Further, the central partition plate 40 is formed with two ventilation air discharge ports 40b at two locations so as to open into the outdoor heat exchange chamber 14. The outlet 40b is a sound deadening box 40c having a sponge-like sound absorbing sheet adhered to the inside thereof.
It is surrounded by. The opening 4 of this muffling box 40c
0d is located above the lateral gutter 48, and is located downstream of the lateral gutter 48 with respect to the discharge port 40b.
This prevents rainwater or the like entering the outdoor heat exchange 14 or rainwater or the like flowing in the gutter 48 from entering the engine room 7 from the discharge port 40b.

The side wall of the engine room 7 is provided with the front side plate 37a,
The left side plate 37c, the rear middle plate 44a, and the right middle plate 44b are formed, the ceiling wall is formed by the engine room side partition plates 41a, 41b, and the central partition plate 40, and the bottom wall is formed by the floor plate 3
It is composed of a bottom plate 45 which is arranged at a distance from the base plate 45. The upper and lower end surfaces of the rear middle plate 44a and the right middle plate 44b are airtightly connected to the partition plate 39 and the floor plate 33, and thus the engine room 7 has a soundproof structure.

The space between the bottom plate 45 and the floor plate 33 is a box-shaped air introduction chamber 46, and the bottom plate 45 has a large number of jet outlets 45a for blowing the ventilation air into the engine room 7. They are arranged and formed substantially evenly over the entire area. Two engine room air inlets 46a that open into the piping chamber 10 are formed on the right middle plate 44b side of the air introducing chamber 46, and a ventilation fan 47 is provided at each of the air inlets 46a. ing.

On the inner surface side of the rear side plate 37b in the piping chamber 10, there are provided an electrical equipment box 50 in which various control devices are accommodated and arranged, and a terminal chamber 22 for connecting to external piping. An air inlet 50a is formed on the bottom surface of the electrical equipment box 50, and an exhaust port 50b is formed on the upper portion of the side surface, and a gap serving as an air passage is formed between the bottom surface and the floor plate 33. The floor plate 33 is filled with outside air from the piping chamber 10
A piping chamber air intake 33b for introducing into the inside is formed, and a part of the introduced outside air is an air intake 50a.
Is introduced into the electrical equipment box 50 for ventilation, and then discharged from the discharge port 50b.

Inside the outdoor heat exchange chamber 14, the upper outdoor heat exchangers 11, 11 for the refrigerant are provided at the upper portions of the front and rear sides, the lower outdoor heat exchanger 12 for the refrigerant is provided at the lower rear portion, and the front side is also provided. The heat exchangers 13 for engine cooling water are arranged in the lower part. The outdoor upper heat exchangers 11 and 11 are arranged vertically and along the wire nets 38a and 38b. Further, the lower outdoor heat exchanger 12 and the cooling water heat exchanger 13 are arranged so as to be inclined so that the lower portions are located inward, and the rubber hose 13c is provided on the right side of the upper end of the cooling water heat exchanger 13. The above-mentioned water injection port 30b connected to is provided.

The lower end of the heat exchanger 13 for cooling water passes over the engine room side partition plates 41a and 41b and the central partition plate 40.
And the muffling box 40c are located at the upper corners. Further, the lower end portion of the outdoor lower heat exchanger 12 for refrigerant is located in the lower corner portion of the central partition plate 40 and the sound deadening box 40c beyond the pipe chamber side partition plates 42a and 42b and beyond the lateral gutter 48.

The pipes 29c, 29d, 16b, 16c, and 30 for connecting the heat exchanger 13 for cooling water, the heat exchangers 11 and 12 for refrigerant, and the devices in the piping chamber 10 are connected here.
c is gathered on the right side plate 37d side of the piping chamber 10 and in the center part in the front-rear direction.
It penetrates through one sealing pad 49 arranged at the right end portion of, and thus the plurality of tube bundles P are sealed by one pad. Each of the notches 4 connecting the conduit holes to the left side plate 37c side end is formed in the sealing pad 49.
9a, so that after the piping, the right side plate 37d can be fitted in the removed state.

As shown in FIGS. 8 to 15, the engine 5 of this embodiment is a water-cooled parallel four-cylinder OHV engine and is arranged in the engine room 7. In this engine 5, an oil pan 5b is bolted and fixed to a lower mating surface of a cylinder block 5a, a cylinder head 5c is fastened to the upper mating surface with a head bolt, and a head cover 5d is attached to the cylinder head 5c.
The structure is covered with. The cylinder block 5a
The piston 5e slidably inserted into the cylinder bore of the connecting rod body 5f and the connecting rod cap 5
It is connected to the crankshaft 5g at f ', and a valve train 5h is arranged on the cylinder head 5c. In this valve operating system 5h, an intake valve 5i, an exhaust valve 5i 'are connected to the crankshaft 5 via a rocker arm 5j and a push rod 5k.
It is configured to be opened and closed by a cam shaft 5l arranged near g. Reference numeral 200 denotes two connecting bolts for connecting the connecting rod body 5f and the connecting rod cap 5f 'with the crankshaft 5g interposed therebetween.

Further, in the engine 5, the cylinder block 5a has a one-block structure in which four cylinders are integrated, while the cylinder head 5c.
Has a structure in which two cylinder bores are divided into one, that is, two sets.
Two sets of d are also provided. And each of the above head covers 5
A breather chamber is formed in each of d (see FIG. 10).

As shown in FIG. 11, a flywheel 91 is connected to the right end of the crankshaft 5g when viewed from the rear surface of the engine 5, and a ring gear 91a of the flywheel 91 is disposed on the rear surface of the engine. The output gear of the starter motor 91b can be meshed. A gear type speed change device 92 is connected to the left end of the crankshaft 5g, and the compressors 6, 6 are connected to the speed change device 92 via the clutches 6a, 6a. As described above, in this embodiment, since the gear type transmission 92 is provided, there is no problem that the belt type transmission requires periodical belt replacement.

The transmission 92 has a structure in which the mating surface a2 of the gear case 92a is oil-tightly and integrally connected to the mating surface a1 of the cylinder block 5a and the oil pan 5b constituting the engine case on the side opposite to the flywheel side. (See FIG. 11). The gear case 92a functions as a side cover of the engine case, and when viewed from the mating surface a2 side, as shown in FIG. 14 (a view of the transmission 92 from the left), the gear case 92a extends in the crankshaft direction. It looks like a quadrangular dish. Note that the gears are removed in FIG. A pair of P's are provided in the gear case 92a.
TO shafts (output shafts) 92b and 92b are arranged in parallel with the crankshaft 5g. Both PTO shafts 92b are rotatably cantilevered by a boss 92c formed on the bottom wall 92d of the gear case 92a, and the outer end of the PTO shaft 92b is located outside the bottom wall 92d (see FIG. 15). To the right),
An oil seal 92 is provided between the protrusion and the boss 92c.
It is sealed with e.

First and second driven gears 93a and 93b are mounted on the inner ends of the PTO shafts 92b and 92b located on the engine case side, respectively. The driven gears 93a and 93b are fastened to the PTO shaft 92b by bolts 93c and fixed by locking with a knock pin 93d, and the knock pin 93d is pressed by a washer 93c 'of the bolt 93c to prevent it from coming off.

Further, the bottom wall 92 of each PTO shaft 92b.
As shown in FIG. 15, generally rectangular connecting plates 95a and 95b are fastened and fixed to the outer end portion protruding from d by three bolts 95e. Rubber bushes 95f are formed on both outer edges of the connecting plates 95a and 95b.
2 are provided in total, and a total of 4 are provided, and the tip end of a bolt 95c fixed to the flange 6c is inserted and connected to each rubber bush 95f. The bolts 95c, 95c
, A single nut 95d is shared, and the flange 6c is fixed to the clutch 6a of the compressor 6. In this way, one nut 95d is replaced with a pair of bolts 95
The number of parts of the nut is reduced by sharing it with c and 95c, and co-rotation at the time of attachment and detachment is prevented to improve workability.

The crankshaft 5 is provided in the gear case 92a.
The output part 5g 'of g projects, and the first to third drive gears 94a to 94c are coupled to the output part 5g'.
The third drive gear 94c is the cam gear 5l of the cam shaft 5l.
', And the first and second drive gears 94a and 94b mesh with the first and second driven gears 93a and 93b, respectively. A gear 61e of an oil pump 61 described later meshes with the cam gear 5l '. Here, the first drive gear 94a, the driven gear 93a, and the second drive gear 9 are
4b and the driven gear 93b have different gear ratios, so that the two compressors 6 and 6 have different gear ratios.
Is driven. With such a configuration, it is possible to arrange compressors having different performances, and by driving one or the other or both of the compressors depending on the load of cooling and heating, three types of refrigerant compression can be obtained. It is possible to add characteristics. Therefore, the degree of freedom in gear ratio design and the ease of assembly can be improved.

In the engine 5 of this embodiment, its crankshaft 5g is oriented parallel to the front side plate 37a of the engine room 7,
Further, the cylinder shaft is arranged in a forward tilted state with a tilt axis X tilted such that the cylinder shaft is inclined toward the front side plate 37a toward the upper part thereof. Due to this forward tilting arrangement, the lower mating surface of the cylinder block 5a which is orthogonal to the cylinder axis (X) is tilted so as to be positioned higher toward the far side portion from the front side plate 37a (see FIG. 8). On the other hand, the bottom wall 5b 'of the oil pan 5b attached to the inclined mating surface is bulged downward so that the bottom wall 5b' thereof is substantially parallel to the floor plate 45.

Two sets of engine mount support brackets 81 and 82 are provided at both ends of the engine 5 in the crankshaft direction. As shown in FIG. 11, when viewed from the rear of the engine, the two sets of support brackets 81, 81 'on the right side are on the right end of the oil pan 5b, and the two sets of support brackets 82, 82' on the left side are the transmissions. 92
Is arranged below the gear case 92a. When viewed in the crankshaft direction, the support brackets 81 ′, 8
2'is arranged at a position close to the front side plate 37a, and the support brackets 81, 82 are arranged at positions far from the front side plate 37a (see FIG. 10). The support brackets 81, 81 ', 82, 82' have basically the same structure, and the support brackets 81, 8
1'or 82, 82 'has a structure in which a common base plate 81c and a bracket plate 81a at each position are bolted and fixed with a mount member 81b made of an elastic body interposed therebetween. The base plate 81c is fixed to the floor plate 45. All the bracket plates 81a on the side of the transmission 92 are bolted and fixed to the gear case 92a.
On the other hand, the bracket plate 81a on the end side of the oil pan and on the side of the front plate 37a is bolted and fixed to a boss portion 5a 'formed near the lower mating surface of the cylinder block 5a, and is further arranged on the side far from the front plate 37a. The bracket plate 81a of the installed support bracket 81 is bolted and fixed to the corner portion of the bottom wall and the vertical wall of the oil pan 5b.

On the outer surface of the bottom wall 5b 'of the oil pan 5b, there are a number of fins 75 extending in the crankshaft direction.
Are integrally formed. The fins 75 improve the rigidity of the oil pan 5b and improve the cooling efficiency. That is, the cooling air introduced by the ventilation fan 47 described above is supplied into the engine room 7 through the air introduction chamber 46, and the heat exchange between the cooling air and the fins 75 cools the lubricating oil in the oil pan 5b. Will be done (Fig. 1
reference). As a result, a special device for cooling the lubricating oil can be dispensed with, and the installation of the device can be simplified.

Further, the crankshaft 5 of the oil pan 5b is
A bearing portion 77 is formed at a portion of g corresponding to each journal portion. The bearing portion 77 is formed by bulging a part of the bottom wall portion of the oil pan 5b toward the mating opening thereof, and the bearing portion 77 and the bearing portion 5a 'of the cylinder block 5a. By the above crankshaft 5g
Is pivotally supported. By forming the bearing portion 77, the rigidity and strength of the oil pan itself are improved, and thus the rigidity and strength of the entire engine can be improved, which contributes to the reduction of vibration and noise.

Two sets of inspection windows 78 are formed in the cylinder block skirt portion of the engine 5, and the inspection windows 7 are formed.
A lid member 78a for removably closing the opening is attached to 8 by a mounting bolt. Each of the above inspection windows 78
Is formed at a boundary portion between adjacent cylinders and at a position facing a bearing portion of the crankshaft 65 and a connecting portion between the crankshaft 65 and the connecting rod large end portion. That is, the connecting rod body 5f
Two bolts 2 to fasten the connecting rod cap 5f 'to
The inspection window 7 is arranged so that an extension of the line connecting 00 and 200 can pass through the inspection window 78 as the crankshaft 5g is rotated.
8 is arranged, and the size of the inspection window 78 is
The connecting rod body 5f, connecting rod cap 5f ', and piston 5e are sized to pass therethrough. The inspection window 78 is located above the upper limit oil level of the lubricating oil in the oil pan 5b, below the tilt axis X, and substantially opposite to the front plate 37a.

Next, the intake and exhaust systems of the engine 5 will be described. Each intake port 5p of the engine 5 is led out to the upper side of the cylinder shaft, and an intake manifold 73 'connected to each intake port 5p extends to the right side plate 37d side in the direction of the crankshaft 5g and has a gas mixer at its end. 21b are connected, and the gas mixer 21b is connected to the air cleaner 21c arranged above the compressor 6 in the engine room 7 by an intake hose 21a '. This air cleaner 2
Reference numeral 1c is a combination of an intake silencer portion and an air cleaner portion, and a lid portion (not shown) of the air cleaner 21c is directed to the front side plate 37a side so that maintenance such as cleaning and replacement of the element can be easily performed. It has become.

The four exhaust ports 5q of the engine 5 are led out to the lower side of the cylinder shaft.
An exhaust gas heat exchanger 23b is directly connected to the external connection port of, that is, without an exhaust pipe interposed. As shown in FIG. 8, the exhaust gas heat exchanger 23b has a structure in which an inner fin type heat exchange section 73 located on the upper side and a screw type heat exchange section 74 located on the lower side are integrated. It is set longer than the interval between the exhaust ports 5q at the both ends.

The inner fin type heat exchange section 73 is formed by utilizing the exhaust passage, and the upper step section and the lower step section are bent so as to have a substantially U shape in order to secure a necessary heat exchange area. It has a structure in which it is molded, the outer surface is surrounded by a cooling jacket 73a, and a large number of fins 73b are projectingly formed on the inner surface. The exhaust ports 5q communicate with each other in the upper stage portion, and the water conduit 29e 'is connected to the cooling water outlet of the cooling jacket 73a.

In the screw type heat exchange section 74, the cooling jacket (casing) 74a is formed into a cylindrical shape,
A large number of spiral screw pipes 74b are arranged in the jacket 74a, the upstream end of the pipes 74b is an upstream chamber into which the exhaust gas passing through the inner fin type heat exchange section 73 is introduced, and the downstream end is an exhaust pipe. The structure is connected to the exhaust silencer 23c through 23a '. The exhaust silencer 23c is arranged above the compressor 6 in the engine room 7 and adjacent to the air cleaner 21c.

The compressor 6 on the floor plate 45 of the engine room 7
A neutralizer 82 for neutralizing the condensed water containing the acidic gas in the exhaust gas is arranged at the lower position. The exhaust gas heat exchanger 23b, the exhaust silencer 23c, and the mist separator 83 are connected to the neutralizer 82 via respective drain hoses (see FIG. 1).

Next, the cooling system of the engine 5 of this embodiment will be described. In the cooling jacket circulation circuit which is one of the low temperature circulation circuits, the cooling water pump 28a and the water pipe 29
a through the cooling jacket 28b of the outer peripheral portion of the wet liner 500a shown in FIG. 8 and the cooling jacket 28b of the cylinder head 5c, and further with the water pipe 29a ', the switching valve 28c, the water pipes 29s, 29t, and the cooling water pump 28a. Therefore, the cooling water circulates.

In the exhaust gas heat exchanger circulation circuit which is one of the low temperature circulation circuits, the cooling water pump 28e, the water pipe 29e, the exhaust gas heat exchanger 23b, the water pipe 29e ',
Bypass pipe 29 that bypasses the switching valve 28c
Cooling water circulates in the circuit of r, the water pipe 29b, the three-way valve 28d, the water pipe 29c, the cooling water heat exchanger 13, the water pipes 29d and 29p, and the cooling water pump 28e. When the temperature is high, the cooling water pump 28e and the cooling water pump 2 are
Since 8a is connected in series, the cooling water also circulates in the circulation circuit at high temperature. That is, the three-way valve 28d
It branches off from the heat exchanger 13 for cooling water or the heat exchange part 29g of the main accumulator 8 and returns to the cooling water pump 28e via the water pipe 29p.

Next, the lubricating system of the engine 5 of this embodiment will be described. This lubrication system is shown in FIGS. 9, 16 and 17.
Is shown in. Note that FIG. 16 is a partial cross-sectional view of the transmission taken along a horizontal plane, in which the partial cross-sectional view of the cylinder portion is integrally displayed. The lubricating system sucks up the lubricating oil in the oil pan 5b through the oil strainer 61b by the oil pump 61, pressure-feeds it through the oil filter 62 to the main gallery 63 arranged at the center of the cam shaft, and from here, the The first and second engine lubrication systems A and B to be distributed and supplied to the lubricated portion, and the gears that are pressure-fed from the oil filter 62 into the transmission 92 (middle gear case m) and are distributed and supplied to the lubricated portions at various places from here. And a gear lubrication system C. Incidentally, 61a is a relief valve for keeping the discharge pressure of the oil pump 61 at a predetermined value or less, and 62a is built in the oil filter 62 and bypasses the lubricating oil when the passing pressure of the filter 62 becomes a predetermined value or more. The relief valve 63a is an oil passage connecting the oil filter 62, the main gallery 63, and the oil passage 96 of the gear case 92a.

The first engine lubrication system A supplies oil from 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 then returns to the oil pan 5b. Is configured. The second engine lubrication system B is configured to supply oil from the main gallery 63 to the valve operating systems 5h of the cylinder heads 5c, and then return the oil to the oil pan 5b.

In the lubricating system B, the oil passage 5 from the main gallery 63 to the tappet chamber of the tappet 5j.
Only two sets of left and right are provided, and a throttle 5u is provided on at least one of them to adjust the flow rate of the left and right oil passages 5t. Further, the breather chamber 5m formed in each of the head covers 5d is connected to the oil separator portion 76 from the breather outlet 5n through the breather passage 69, and the lubricating oil separated by the separator 76 is returned from the return hose 80 to the oil pan. Returned to 5b.

In the speed change gear lubrication system C, a part of the lubricating oil from the oil passage 63a on the upstream side of the main gallery 63 is passed through the oil passage 96 of the gear case 92a, and from here, each P oil is fed.
Bearing 67 of TO shaft 92b and each gear 93a, 93b,
The meshing portion 68 of 94a to 94c is supplied with oil, and then the lubricating oil that has dropped to the bottom of the gear case 92a is returned to the oil pan 5b. The abrasion powder that is likely to be generated in each gear meshing portion 68 is washed away by the oil that is forcibly circulated and accumulated in the oil pan 5b or is captured by the oil filter 62.

In the transmission gear lubrication system C, since the lubricating oil on the engine side is shared, there is a possibility that the time for the lubricating oil to reach the transmission is prolonged especially when the engine is started. Therefore, in this embodiment, the oil pump 61 is arranged near the joint surface of the gear case 92a of the oil pan 5b, and the oil passages 63a to various parts of the engine are arranged near the gear case 92a side of the cylinder block 5a.
The oil passage to the transmission is formed to extend from the oil passage 63a to the oil passage 96 of the gear case 92a. As a result, the oil passage length from the oil pump 61 to each part of the transmission is shortened, and the time required for the lubricating oil to reach the transmission can be shortened. In addition, because it shares the lubricating oil,
Since the oil pump 61, the oil strainer 61b, the oil tank 24a, and the like can be shared, it is not necessary to carry out the inspection of the lubricating oil independently, and the management of the replenishing lubricating oil is different from the case of using two kinds of lubricating oil. Is also easy.

The oil hose 2 is attached to the oil pan 5b.
An oil tank 24 which is separate from the engine 5 via the 4c and 24d and is arranged at a higher position than the oil level of the oil pan 5b.
a is connected to the oil hoses 24c and 24d.
A solenoid valve 24b is provided in the middle of. When the solenoid valve 24b is opened, the lubricating oil is replenished in the oil pan 5b by its own weight.

The oil tank 24a is provided between the right middle plate 44b of the engine room 7 and the right side plate 37b of the casing 31, that is, in the pipe room 10 having a lower bottom than the engine room 7, and its replenishing port 24e.
Are arranged so as to face the front side plate 37a side. Further, as shown in FIG. 3, the oil tank 24a has a cutout portion formed in a lower portion thereof so as to form an L shape, and the reserve tank 30a is arranged in the cutout portion.
As a result, both large tanks 24a, 30 can be installed in a small space.
Arrange a reasonably. Further, by removing the front side plate 37a, the supply ports 24e, 30d of both tanks 24a, 30a are exposed to the outside, so that oil supply and cooling water supply can be performed simultaneously and easily. Also,
By making the tank widths of the oil tank 24a and the reserve tank 30a narrower than the opening of the system, the front side can be replaced.

The solenoid valve 24b is fixed via a bracket near the support bracket 81 on the left side of the upper surface of the floor plate 45 and near the lubricating oil inlet 5r to the oil pan 5b. The electromagnetic valve 24b and the inlet 5r are connected by a flexible oil hose 24c, and the electromagnetic valve 24b and the oil tank 24a are connected by an oil hose 24d.

The oil pump 61 has an oil pan 5b.
And within the vicinity of the skirt of the cylinder block 5a,
Further, it is arranged in the lower part of the tilt axis X. The oil filter 62 is removably attached to a bracket 5v that is removably attached to the lower portion of the inclined axis X on the outer surface of the skirt portion of the cylinder block 5a.
As a result, the oil filter 62 is located below the exhaust gas heat exchanger 23b, and the front side plate 37a described above is provided.
It is designed to be exposed to the outside when removed, and can be attached and removed from the outside. Also, the above oil filter bracket 5
Since there is v, even if the attachment / detachment bracket of the oil filter 62 is damaged, only the bracket 5v needs to be replaced.

Further, the oil filter 62 is located below the discharge port 61a of the oil pump 61 and the inlet of the oil passage 63a to the engine side. Therefore, the lubricating oil accumulated in the oil filter 62 is retained. Does not come off even when the oil pump 61 is stopped for a long period of time. Further, by appropriately setting the shape of the bracket 5v, the mounting position and mounting direction of the oil filter 62 and the height relationship with the pump outlet and the lubricating oil surface can be freely set, and therefore workability such as oil exchange and maintenance is improved. In addition, the engine 5 can be made compact.

Next, the function and effect of this embodiment will be described. During the cooling operation, the four-way valve 15 is switched to the outdoor heat exchanger side shown in FIG. 7. The refrigerant gas compressed to high temperature and high pressure by the compressors 6 and 6 is cooled by the refrigerant pipe 16
It is supplied to the refrigerant outdoor heat exchangers 11 and 12 via a, the four-way valve 15 and the refrigerant pipe line 16b, where it is cooled by the outside air and liquefied. This liquefied high-pressure refrigerant liquid is the refrigerant pipe 1
6c passes through the inside of the main accumulator 8 and is decompressed by the expansion valve 18 of the refrigerant pipe line 17a. The decompressed low-pressure refrigerant liquid takes heat from the indoor air in the indoor heat exchanger 4 and evaporates, and the evaporation heat causes a cooling effect to cool the room. The evaporated refrigerant gas returns from the refrigerant pipe 17b to the compressor 6 through the four-way valve 15 and the refrigerant pipe 16d, the main accumulator 8 and the sub accumulator 9, and the same cycle is repeated.

During the heating operation, the four-way valve 15 is switched to the indoor heat exchanger side, and the high-temperature, high-pressure refrigerant gas from the compressors 6 and 6 is passed through the refrigerant pipe lines 16a and 17b. Is supplied to the room air, where it is cooled and liquefied by the room air, and the room air is warmed by the condensation heat in this case, and the heating effect is obtained. The liquefied refrigerant liquid is decompressed by the expansion valve 18. The depressurized low-pressure refrigerant liquid evaporates by removing the heat of the outside air in the outdoor heat exchangers 11 and 12, and the main accumulator 8 and the sub accumulator 9
Return to the compressor 6 via and the same cycle is repeated.

Heat exchange in the outdoor heat exchange chamber 14 is performed as follows. Blower fan 44 for outdoor heat exchange
By the rotation, the outside air is sucked into the outdoor heat exchange chamber 14 from the wire nets 38a and 38b, and is discharged upward from the ceiling opening 37f. In this case, as shown in FIG. 2, in the upper part of the outdoor heat exchange chamber 14, since it is close to the blower fan 44, air flows in in a substantially horizontal direction. Since the upper heat exchanger 11 is arranged vertically, the air passing through the upper heat exchanger 11 flows in a direction substantially perpendicular to the upper heat exchanger 11 as indicated by an arrow a. Therefore, the air flow rate can be made uniform over substantially the entire surface, and the heat exchange rate can be improved.

On the other hand, in the lower part of the outdoor heat exchange chamber 14, since it is far from the blower fan 44, air flows in obliquely upward.
On the other hand, since the lower heat exchangers 12 and 13 are arranged so that the lower ends are located inside, the lower heat exchangers 12 and 13 flow in a direction substantially perpendicular to the lower heat exchangers 12 and 13. In this case as well, the heat exchange rate can be improved in the same manner as above.

According to this embodiment, the engine 5 is inclined forward by the inclination axis X so that the upper portion of the engine 5 is closer to the front side plate 37a. Therefore, by removing the front side plate 37a, for example, the ignition plug 5w is inspected. , Lubrication to the lubrication port 5x provided on the cylinder head cover 5d and capped,
Most of the work required for adjustment of tappet clearance, maintenance of the engine such as waste oil from the oil drain 5u of the oil pan 5b, inspection of the oil level gauge 5z, etc. can be easily performed from the front, and the engine is oriented vertically. The maintainability can be improved compared to the case.

Since the engine 5 is tilted forward,
The portion of the cylinder block far from the front side plate 37a is located at a high place. Therefore, when the conventional structure for supporting the cylinder block is adopted in the engine mount, the support bracket at the far portion becomes long.
In this embodiment, since the bracket plate 81a is bolted and fixed to the lower portion of the oil pan 5b, the support bracket 81 of the portion far from the front side plate 37a of the oil pan 5b is supported as compared with the case where the cylinder block is mounted and supported. The bracket can be shortened, and as a result, it is not necessary to use a support bracket having high rigidity and strength or to separately add a reinforcing member, and it is possible to avoid an increase in weight and a rise in cost. Further, when supporting the onle pan 5b, the bracket plate 81a of the support bracket 81
Is supported at the corners of the vertical wall and the bottom wall of the end of the oil pan 5b, which have high rigidity, so that the deformation of the oil pan 5b can be prevented without requiring special reinforcement. Further, the bearing portion 77 is formed integrally with the oil pan 5b of the present embodiment, and the rigidity of the oil pan itself is high. From this point as well, it is possible to avoid troubles due to supporting the oil pan itself. Further, although the cylinder block is supported at the portion closer to the front side plate 37a side, since the cylinder block position is low in this portion, the support bracket does not become long. Furthermore, since the gear case 92a coupled to the engine 5 is supported on the transmission 92 side, it is possible to prevent the engine weight and external force from excessively acting on the oil pan 5b.

In the present embodiment, since the inspection window 78 is formed in the skirt portion of the cylinder block 5a of the engine 5, the inspection work of the state of the bearing portion of the crankshaft 65, the large end portion of the connecting rod 5f and the like can be easily performed. be able to. Also,
Since the inspection window 78 is formed between the adjacent cylinders, the connecting rod connecting portions of both cylinders can be inspected from one opening, and a minimum inspection window is required.

When the crankshaft 65 is rotated,
An extension of the line connecting the heads of the connecting bolts 200, 200
Since the size of the inspection window 78 is the same as that of the inspection window 78 and the connecting rod 5f, the connecting rod cap 5f 'and the piston 5e can pass therethrough, it is possible to remove the piston without removing the oil pan 5b. 5e, connecting rod 5f, connecting rod cap 5f ', etc. can be replaced.

Further, since the inspection window 78 is provided above the upper limit oil level of the lubricating oil, it is not necessary to temporarily remove the lubricating oil from the oil pan 5b and it is not necessary to remove the oil pan 5b when performing the inspection. It can be done in a short time.
Furthermore, since the inspection window 78 faces the side of the front side plate 37a, the front side plate 37a can be removed to easily perform work from the outside of the front side of the apparatus. That is, inspection work,
Lubrication oil replacement work or the like can be performed without removing the engine 5 from the casing 31.

In the engine 5 of this embodiment, the engine lubricating system A, which supplies the lubricating oil from the oil pump 61 to each lubricated portion of the engine system through the main gallery 63,
B, and the lubricating oil from the oil pump 61 is distributed from the upstream side of the main gallery through the oil passage 96 formed in the gear case 92a of the transmission 92 to each lubricated portion of each gear system. Since C and C are provided, the lubricated parts of the engine and the transmission can be reliably lubricated.

In this case, the oil pump 61 is arranged in the engine case (oil pan 5b) in the vicinity of the joint surface of the gear case 92a, and the oil passage to the transmission is provided from the portion of the cylinder block 5a closer to the gear case 92a to the gear case 92a. Since it is branched inside, the transmission 92
The oil passage length to the lubricated part of can be shortened, and especially enough lubricating oil can be immediately supplied to the transmission at the time of engine start,
As a result, the durability of the transmission can be improved.

Further, since the lubricating oil is distributed to the engine system and the speed change gear system on the upstream side of the main gallery 63, the pressure of the lubricating oil to the speed change gear system can be secured, and as a result, from this point as well. The time required for the lubricating oil to reach each lubricated portion of the transmission gear system can be shortened, lubrication can be smoothly performed at engine startup, and the durability of the transmission 92 can be improved.

Further, in the present embodiment, the gear case 92a is oil-tightly connected to the end opening portions of the cylinder block 5a and the oil pan 5b which form the engine case of the engine 5, and the gear case 92a is in the engine case side space. Since the speed change gears 93a, 93b, 94a to 94c are disposed in the engine, the gear case 92a can be used also as a side cover of the engine, and a case that separates the engine case and the gear case such as a transmission provided separately from the conventional engine. The wall can be eliminated, the transmission 92 can be arranged without increasing the length of the entire engine, and the size can be reduced.

Further, in this embodiment, since the PTO shaft 92b is supported by the bottom wall 92d of the gear case 92a in a cantilevered manner, the transmission 92 can be made compact also from this point, and the gear case 92a together with the transmission gear can be easily removed from the engine case. It can be removed to improve the serviceability. Furthermore, in this embodiment, the transmission 92 and the compressor 6
Since the bolt 95c of the flange 6c on the compressor 6 side is inserted into the rubber bush 95f on the transmission 92 side for connection with the compressor, it is easy to connect and disconnect the compressor and to prevent vibrations due to torque fluctuations and the like. Can be absorbed.

Further, in this embodiment, the oil filter 62
Is located below the discharge port 61a of the oil pump 61 and below the oil passage 63a at the engine side inlet.
Lubricating oil can be constantly stored in the oil filter 62, and will not come off even when the oil pump 61 is stopped for a long period of time. Therefore, when the engine 5 is restarted after being stopped for a long period of time, it is not necessary to fill the oil filter 62 with the lubricating oil, and thus the lubricating system can be started up faster.

Since the oil filter 62 is fixed to the engine 5 via the bracket 5v, the height relationship with the pump discharge port 61a, the oil surface, etc. can be freely set, and the oil filter 62 can be freely mounted in the mounting direction. The degree of layout is high and the layout can be improved.

[0078]

As described above, according to the oil filter arranging structure of the engine lubricating device of the first aspect of the invention, the oil filter is arranged below the discharge port of the oil pump and below the lubricating oil inlet of the engine. As a result, even if the engine is stopped for a long time, the lubricating oil will not escape,
This has the effect of speeding up the startup of the lubricating system.

According to the second aspect of the invention, since the oil filter is attached to the engine through the bracket, there is an effect that the height relationship with the pump discharge port and the lubricating oil surface can be freely set, and at the time of replacement and maintenance. It is possible to improve the workability of and to make it compact.

[Brief description of drawings]

FIG. 1 is a partial sectional front view of an engine-driven air conditioner to which an oil filter arrangement structure for an engine lubrication device according to an embodiment of the present invention is applied.

FIG. 2 is a partial cross-sectional rear view of the apparatus of the above embodiment.

FIG. 3 is a partial cross-sectional right side view of the apparatus of the above embodiment (II in FIG. 2).
It is a sectional view taken along the line I-III).

FIG. 4 is a partial cross-sectional left side view of the apparatus of the above embodiment (IV in FIG. 2).
-IV line sectional view).

FIG. 5 is a plan view showing a floor member portion of the outdoor heat exchange chamber of the apparatus of the embodiment.

FIG. 6 is a cross-sectional plan view showing an engine room and a piping room of the apparatus of the above embodiment.

FIG. 7 is a system diagram showing an overall configuration of the apparatus of the above embodiment.

FIG. 8 is a partial cross-sectional side view of the engine of the embodiment.

FIG. 9 is a schematic diagram showing a lubricating system of the engine of the embodiment.

FIG. 10 is a left side view of the engine of the embodiment.

FIG. 11 is a rear view of the engine of the embodiment.

FIG. 12 is a schematic front view of the engine of the embodiment.

FIG. 13 is a partial cross-sectional plan view showing the transmission of the engine of the above embodiment.

FIG. 14 is a right side view showing the transmission of the engine of the embodiment.

FIG. 15 is a left side view showing a transmission of the engine of the above embodiment.

FIG. 16 is a sectional view showing a lubricating device for the engine of the embodiment.

FIG. 17 is a system diagram showing a lubricating oil system of the apparatus of the above embodiment.

[Explanation of symbols]

5 engine 5v bracket 61 Oil pump 61a Discharge port of oil pump 62 oil filter 63a Engine side lubricating oil inlet

Continuation of the front page (56) Reference JP-A-2-218810 (JP, A) JP-A-3-54311 (JP, A) Actually open 2-147809 (JP, U) Actually open 60-178316 (JP , U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F01M 11/03

Claims (2)

(57) [Claims] 1. Lubricating oil from an oil pump can be attached and detached.
In the oil filter arrangement structure of the engine lubrication device adapted to supply each lubricated portion of the engine through the oil filter, the engine is arranged in the engine room,
Connecting an exhaust gas heat exchanger to the exhaust port of the engine,
Install the oil filter below the exhaust gas heat exchanger.
Position, and further below the discharge port of the oil pump,
And so that it is located below the lubricating oil inlet of the engine
The front side plate that constitutes the above engine room and is removed.
An oil filter arrangement structure for an engine lubricating device, characterized in that the oil filter is exposed to the outside . 2. The oil filter arrangement structure for an engine lubrication device according to claim 1, wherein the oil filter is detachably attached to the engine via a bracket.