CN1145742C

CN1145742C - Cooling structure of internal combustion engine

Info

Publication number: CN1145742C
Application number: CNB011248734A
Authority: CN
Inventors: 轮违薰; 一郎; 新妻桂一郎; 明; 冈野则明; 司; 堤崎高司
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2000-08-04
Filing date: 2001-08-03
Publication date: 2004-04-14
Anticipated expiration: 2021-08-03
Also published as: TW482857B; ITTO20010779A1; JP2002047934A; ES2224761B1; ES2224761A1; CN1337522A

Abstract

The invention provides a cooling structure of an internal combustion engine. In a cooling structure for an internal combustion engine, a flow passage 70 around a cylinder bore of a cylinder block 4 is communicated to a flow passage 80 around a combustion chamber of a cylinder head 5 to form a cooling passage, an opening portion to the outside for a flow passage of a cylinder head 5 is water-tightly closed by a cover member 9 to thereby circulate a cooling water in the cooling passage as a water jacket, or to make the air flow in the cooling passage as an air jacket, thereby making an air cooled internal combustion engine.

Description

The cooling construction of internal-combustion engine

Technical field

The present invention relates to a kind of cooling construction of internal-combustion engine, particularly relate to the cooling construction of cylinder and cylinder head.

Background technique

In the occasion of common air cooling internal-combustion engine, the cooling air that is propped up in the revolution of the blowing fan of bent axle one end imports to the cover that covers cylinder by axle is guided by this cover, flows through between a plurality of fins of outer surface of cylinder and cylinder head, siphons away heat, thus but cooling internal combustion engines.

For the internal-combustion engine of air cooling structure as described above, can not replace cooling air to flow with flow of cooling water, migrating is water-cooled internal combustion engine.

That is, owing to open between a plurality of fins that are exposed in the cooling air towards the outside, so, can not between fin, keep cooling water to flow by it.

Therefore, the example (Japan opens clear 56-103642 communique in fact) to form the cooling air passage between the fin that the local covering of useful partition wall cooling air flows through, this cooling air passage can be used as the passage of cooling water.

Yet, as the cooling action of air cooling, owing to be will towards between the open a plurality of fins in the outside, to realize between fin by cooling air is flow through, so, be not between all fins, partition wall to be set, for this reason, in the occasion of water-cooled, cooling water passage deficiency, the cooling effect that can not obtain to expect.

Summary of the invention

The present invention makes in view of such problem, and its purpose is to provide a kind of cooling construction that need not change the internal-combustion engine that main structure can both be used in the occasion of water-cooled and air cooling basically.

In order to achieve the above object, in the internal-combustion engine cooling construction of the 1st invention, the stream around the firing chamber of stream around the cylinder hole of cylinder block and cylinder head is communicated with, form cooling flowing path, by sealing the opening portion of the stream of above-mentioned cylinder head towards the outside by cover member watertight ground, can make the cooling water circulation with above-mentioned cooling flowing path as water jacket, constitute water-cooled internal combustion engine, simultaneously, can air be flow through with above-mentioned cooling flowing path as the air cover, constitute the air cooling internal-combustion engine.Above-mentioned cover sheet and thermostat tank during as water-cooled internal combustion engine form as one.

Because the cooling water and air all can flow through around the cylinder hole and the stream around the firing chamber, so, the main structure that need not change internal-combustion engine basically can easily can both use in the occasion of water-cooled and air cooling, the cooling effect that all can obtain to expect in the occasion of water-cooled and air cooling.

The 2nd invention also has such feature on the basis of the cooling construction of the internal-combustion engine of the 1st invention: above-mentioned cover member and thermostat tank during as water-cooled internal combustion engine form as one.

The maintenance case of the thermostat that does not need during air cooling and only use when water-cooled is integrally formed in cover, so for the installation of carrying out thermostat need not change the main structure of cylinder block and head, the mounting or dismounting of thermostat are simple, applicable to water-cooled and air cooling both sides.

The 3rd invention also has such feature on the basis of the cooling construction of the internal-combustion engine of the 1st or the 2nd invention: above-mentioned cover member and spark plug support during as water-cooled internal combustion engine form as one.

Because at the integrally formed spark plug support of cover member, so, any occasion in the type of cooling of water-cooled and air cooling, for spark plug being set at suitable calorific value, by changing over the cover member that suitably designs according to the type of cooling, the main structure that need not change cylinder head can be easily corresponding.

The 4th invention also has such feature on the basis of the cooling construction of the internal-combustion engine of the 1st invention: constitute the air cooling internal-combustion engine, one side in above-mentioned cylinder block is provided with the air introducing port that overlaps connection and opening to above-mentioned cylinder-bore ambient air, this air introducing port and air-supply upstream side are in opposite directions, another side in above-mentioned cylinder block has from the air export mouth of above-mentioned air cover to external communications and opening, the cooling air that flow into above-mentioned air introducing port flows in above-mentioned air cover, around the cooling cylinder-bore, from outflows such as above-mentioned air export mouths.

By desired area the simple processing of air introducing port and air export mouth is set, does not change main cooling construction and promptly can be used as the air cooling internal-combustion engine in the cylinder block of water-cooled internal combustion engine.

The 5th invention also has such feature on the basis of the cooling construction of the internal-combustion engine of the 4th invention: the fan of supporting blowing fan covers the one side of coating gas cylinder body at least, disposes said fan opposite to each other with above-mentioned air introducing port.

Because the fan cover of coating gas cylinder body one side and the air introducing port of cylinder block support blowing fan opposite to each other at least, so, the air-supply of blowing fan flow into the air introducing port with good efficiency, in the air cover of cylinder block and head, flow, from outflows such as above-mentioned air export mouths, can cool off cylinder block and head effectively.

Description of drawings

Fig. 1 is the front elevation that is applicable to water-cooled internal-combustion engine.

Fig. 2 is its subsequent figures.

Fig. 3 for bent axle meet at right angles with its sectional view that dissects.

Fig. 4 illustrates the section that the plane to comprise bent axle in cooling water path dissects and the section of other member.

Fig. 5 is the plan view of the cylinder block of water-cooled engine.

Fig. 6 is its front view.

Fig. 7 is its rear view.

Fig. 8 is the sectional view that dissects along the VIII-VIII line of Fig. 6.

Fig. 9 is the side view of the cylinder head of water-cooled engine.

Figure 10 is its plan view.

Figure 11 is the sectional view that dissects along the XI-XI line of Figure 10.

Figure 12 is the exterior view of the 1st cover member.

Figure 13 is its rear view.

Figure 14 is the sectional view that dissects along the XIV-XIV line of Figure 12.

Figure 15 is the sectional view that dissects along the XV-XV line of Figure 12.

Figure 16 is illustrated in the side view that cylinder head is installed the state of the 1st cover member etc.

Figure 17 is the front view that is applicable to the internal-combustion engine of air-cooling type.

Figure 18 is the plan view of the cylinder block of air-cooled internal combustion engine and the schematic partial sectional view that dissects along bent axle.

Figure 19 is the sectional view suitable with Fig. 8 of cylinder block.

Figure 20 is the plan view of the cylinder head of air-cooled internal combustion engine.

Figure 21 is the sectional view that dissects along the XXI-XXI line of Figure 20.

Figure 22 is the two-wheeled side view that has carried air-cooled internal combustion engine.

The perspective view of Figure 23 is this two-wheeled omission cover etc.

Figure 24 be carried water-cooled engine motor tricycle omission the cover etc. perspective view.

Figure 25 be carried water-cooled engine motor-driven four-wheel wagon omission the cover etc. perspective view.

Embodiment

According to Fig. 1-Figure 21 a form of implementation of the present invention is described below.

At first, be applicable to the water-cooled internal-combustion engine 1 that the cooling water circulation is cooled off according to Fig. 1-Figure 16 explanation.

This water-cooled engine 1 is the single-cylinder four-stroke internal-combustion engine, towards the vertical bent axle 2 that carries of vehicle body fore-and-aft direction with putting.

Fig. 1 is all front elevations of this internal-combustion engine 1, and Fig. 2 is its subsequent figures, and the sectional view of Fig. 3 for dissecing with bent axle 2, Fig. 4 illustrate the section that dissects with the plane that comprises bent axle 2 and the section of other member with meeting at right angles.

Water-cooled engine 1 by clip bent axle 2 with lower crankcase 3 and upper crankcase all-in-one-piece cylinder block 4, successively overlap cylinder block 4 cylinder head 5, and cylinder front cover 6 constitute.

The cylinder of cylinder block 4 protrudes towards right slightly up, vertically has lower crankcase 3, cylinder block 4, cylinder head 5 with the cylinder central shaft.

As shown in Figure 1, cover lower crankcase 3, dispose rectangle radiator 7 in the front of water-cooled engine 1 at cylinder block 4 central parts, the sidewall of the upside in Fig. 1 of cylinder block 4 is installed and is added to device 8, and the cooling flowing path that occlusion gas cylinder cap 5 is installed in the side of the upside of cylinder head 5 is the 1st a cover member 9 of water jacket 80.

In the front that adds to device 8 water pump 10 is installed, the cooling water flexible pipe 11 that stretches out from the outflow side case 7a (left side Fig. 1) of radiator 7 is connected to water pump 10, and the cooling water flexible pipe 12 that stretches out from above-mentioned the 1st cover member 9 is connected to the inflow side case 7b (right side Fig. 1) of radiator 7.

As shown in Figure 1, stretch out outlet pipe 13, protrude breathing pipe 14 towards the top, protrude the serum cap 23 of spark plugs 22 from the 1st cover member 9 from the position by the cylinder front cover 6 of upside sidewall of cylinder head 5 from the sidewall of the front side of cylinder head 5.

As shown in Figure 2, in the lower crankcase 3 and the mating face of cylinder block 4 setting-in is connected the oil pump 24 (with reference to Fig. 4) that is activated with bent axle 2 circular hole 15 is set, the circular hole 16 that output shaft 25 protrudes is set in lower crankcase 3 in the back of water-cooled engine 1.

Stretch out from the left bump that adds to device 8 and to add to suction pipe 17 and to add to discharge tube 18, add to discharge tube 18 and be connected to from the sidewall of the rear side of cylinder head 5 and add to the hole.

In addition, the o 19 that fuel feeding is used is installed, is further stretched out suction tude 20 from the sidewall of the rear side of cylinder head 5 in the back that adds to device 8.

Stretch out standby pipes 21 from the back of the 1st cover member 9.

As shown in Figure 3 and Figure 4, can be free to slide the chimeric pistons reciprocating 31 in ground, connect the crank pin 2a of these pistons 31 and bent axle 2 by connecting rod 32 in the cylinder liner 30 of the cylinder portion of cylinder block 4.

As shown in Figure 4, but bent axle 2 passes through main bearing 35,36 free rotaring ground supportings at pair of bearings frame 33,34, the front portion of the bent axle 2 that protrudes at the front side sidewall that connects lower crankcase 3 and cylinder block 4 is provided with alternator 37, be fixedly mounted on the front end of bent axle 2 around the rotating external rotor 37b of inner stator 37a, cooling fan 38 be installed in the front of external rotor 37b.

Dispose above-mentioned radiator 7 in the place ahead of cooling fan 38.

The pump live axle 24a that connects the trochoid formula oil pump 24 that is flush-mounted in above-mentioned circular hole 15 in the end of the protrusion that is supported on main bearing 36 of bent axle 2 coaxially.

From the bottom oil groove of lower crankcase 3 and cylinder block 4 attract and the oil of discharging from oil pump 24 through the oil circuit 24b in the pump live axle 24a and be located at lower crankcase 3, cylinder block 4, and oil circuit 24c, the 24d of cylinder head 5 supply to each lubricant housings of internal-combustion engine 1 and speed changer.

Be flush-mounted in the timing gear 40 and the cam wheel engagement that is flush-mounted in camshaft 41 of bent axle 2 rear ends, and camshaft 41 revolutions 1 are changeed when bent axle 2 every revolutions 2 are changeed.

As shown in Figure 3, form 3 cams, contact respectively in the 1st intake rocker (not shown), the 1st that is supported on the 1st pitman arm shaft 42 coaxially and add to Rocker arm 4 the 3, the 1st exhaust rocker arm 44 with camshaft 41.

On the other hand, prop up coaxially in the 2nd pitman arm shaft 45 in cylinder head 5 and to honour intake valve 51 and open the 2nd intake rocker (not shown) that valve drives, the 2nd add to Rocker arm 46, and exhaust valve 53 left the 2nd exhaust rocker arm 47 that valve drives what add to that valve 52 leaves that valve drives, connect between the 1st, the 2nd intake rocker by air inlet pull bar (not shown), add to 3,46 of Rocker arm 4s by adding to pull bar 48 connections the 1st, the 2nd, connect 44,47 of the 1st, the 2nd exhaust rocker arms by exhaust pull bar 49.

The revolution of the camshaft 41 that is changeed by above valve actuating mechanism driving rotational 1 when the every revolutions 2 of bent axle 2 are changeed drives intake valve 51, adds to valve 52, exhaust valve 53 by each the 1st rocking arm, pull bar, the 2nd rocking arm, constantly suction tude 20, the opening portion that adds to the firing chamber 5a side of pipe 55, outlet pipe 13 is opened and closed in regulation.

As shown in Figure 4, cast by the suction tude 20 that constitutes towards the tubing that is formed at the firing chamber 5a opening of cylinder head 5, add to pipe 55, outlet pipe 13 in cylinder head 5, mixing is formed at the fuel that the Fuelinjection nozzle 56 of the assembly department 20a of suction tude 20 sprays and sucks air from protrusion, supply to firing chamber 5a, add to add to air.

Be located at a driven gear 58 engagements of an actuation gear 57 and the starting clutch 60 that can be installed on output shaft 25 freely to rotate of the 2nd crankweb 2b periphery of bent axle 2, the power of bent axle 2 is delivered to the output shaft 25 that becomes transmission main shaft by starting clutch 60.

The following describes the cooling construction of cylinder block 4 and cylinder head 5.

Fig. 5-Fig. 8 illustrates the single-piece figure of cylinder block 4.

Fig. 5 is for to watch the plan view of cylinder block 4 from the cylinder axis axle direction, and Fig. 6 is front view (VI of Fig. 5 is to view), and Fig. 7 is rear view (VII of Fig. 5 is to view).

Around cylinder liner 30, form water jacket 70 (with reference to Fig. 3,4,5,8) in the central cylinder portion of cylinder block 4, towards water jacket 70 as Fig. 6 with as shown in Figure 8 from front perforation cooling water importing road 71.

Go out to form 1 circular depressions 72 (with reference to Fig. 6,8) from the front of this cylinder portion towards this water jacket 70 is recessed, from the back of cylinder portion towards the water jacket 70 recessed recesses 73,74 (with reference to Fig. 7,8) that go out to form 2 circles.

As the occasion of air-cooled internal combustion engine, this recess 72,73,74 is for by replacing the part as the air gateway that connects at the casting mold that is used for casting cylinder block with the logical pin of casting.

In addition, cylinder block 4 is installed at this mounting bracket 75 and is added to device 8 having the mounting bracket 75 of big circular hole with the mating face of lower crankcase 3 in part of stretching out towards a side and the projected side wall setting of cylinder portion.

According to Fig. 9-Figure 11 cylinder head 5 is described below.

By the outlet pipe 13, the suction tude 20 that are communicated with the firing chamber 5a of cylinder head 5, add to pipe 55, and install firing chamber 5a that the mounting hole 82 of spark plug 22 surrounds around form water jacket 80.

This water jacket 80 of cylinder head 5 and the water jacket of above-mentioned cylinder block 4 70 are communicated with on the mating face.

The space that constitutes this water jacket 80 has rectangular aperture 81 as shown in Figure 9 in a side of cylinder head 5, cooperates the 1st cover member 9 on its opening mating face 83, and watertight ground is installed, inaccessible water jacket 80.

Valve train such as valve train space 84 (with reference to Figure 10) configuration the 2nd pitman arm shaft 45 above the partition wall above the separation water jacket 80 and the 2nd rocking arm.

Part in valve train space 84 forms ventilation chamber 85, from ventilation chamber 85 extending aeration pipes 14.

The rectangular aperture in this valve train space 84 is covered cylinder front cover 6 inaccessiblely.

The pipe 55 that adds to that casts onto cylinder head 5 bends to the connection opening 5b that is located at identical amalgamation face from the opening of firing chamber 5a as shown in Figure 11, connects from adding to the above-mentioned discharge tube 18 that adds to that device 8 stretches out at connection opening 5b, supplies with to firing chamber 5a and adds to gas.

Explanation is enclosed in the 1st cover member 9 of rectangular aperture of water jacket 80 of the sidewall opening of this cylinder head 5 according to Figure 12-Figure 16 below.

The 1st cover member 9 is provided with the groove bar 91a that embeds sealing material as shown in Figure 13 on the mating face 91 that is coupled to mating face 83, by outer wall 92 space 90 in the inboard forms of protruding from this mating face 91 towards the outside.

As Figure 12 and shown in Figure 13, the spark plug support 93 that the tubular of spark plug 22 is installed from left and right directions central part more being used to of space 90 protrusions inwardly of outer wall 92 forms more projectedly than mating face 91.

Side in the left and right side of outer wall 92 installs thermostat 97, the maintenance case 94 of the above-mentioned cooling water flexible pipe 12 of integrally formed connection and the connecting box 95 that is connected standby pipes 21 the opposing party, and form the installation tube portion 96 of cooling-water temperature sensors 98 in abutting connection with ground with above-mentioned spark plug support 93.

As shown in figure 16, thermostats 97, cooling-water temperature sensor 98, standby pipes 21 are installed, by Sealing

mating face

83,91 are cooperated mutually at the opening of the water jacket 80 of cylinder head 5 at the 1st cover member 9, and by bolt 99 at 4 jiaos of fastening the 1st cover members 9.

The 1st cover member 9 is when joining periphery mating face 91 watertights ground the mating face 83 of cylinder head 5 to by Sealing, and the front end setting-in that will protrude into inner spark plug support 93 arrives the mounting hole 82 of cylinder head 5.

Like this, the interior space 90 of the water jacket 80 of cylinder head 5 and the 1st cover member 9 becomes connected state, makes the cooling water circulation.

The cooling water circulation road of cylinder block 4 and cylinder head 5 constitutes as described above.

Make this cooling water circuit water pump 10 be installed on the front that adds to device 8 as described above, connect cooling water flexible pipe 11 at the pump cover 10b of the pump case 10a that covers this water pump 10 from the place ahead like that as shown in Figure 1 and Figure 4.

Pump case 10a and pump cover 10b extend to the part of cylinder block 4, and the cooling water that covers above-mentioned cylinder block 4 fronts imports road 71 (with reference to Fig. 1), import road 71 towards this cooling water and form cooling water path 10c (with reference to Fig. 4).

The following describes the circulating path of the cooling water of water pump 10.

Driving by water pump 10 is drawn into pump case 10a by cooling water flexible pipe 11 with cooling water from radiator 7, imports the water jacket 70 that road 71 supplies to cylinder block 4 by cooling water path 10c from cooling water, carries out the cooling on every side of cylinder hole.

The water jacket 70 of cylinder block 4 is communicated with the water jacket 80 of cylinder head 5, so cooling water is transferred to the water jacket 80 of cylinder head 5, the firing chamber 5a of cooling air cylinder cap 5 from cylinder block 4.

The cooling water that enters into the interior space 90 of the 1st cover member 9 from the water jacket 80 of cylinder head 5 is regulated by thermostat 97 and is flowed, and is discharged to cooling water flexible pipe 12, turns back to radiator 7.

The interior space 90 of the 1st cover member 9 is from standby pipes 21 supply cooling waters.

By making cooling water in above such cooling water circulating path, circulate cooling air cylinder body 4 and cylinder head 5.

The thermostat 97 that does not need during air cooling and only use when water-cooled and the maintenance case 94 of cooling-water temperature sensor 98 and installation tube portion 96 are integrally formed in the 1st cover member 9, so, need not change the body of cylinder block 4 and cylinder head 5 for the installation of carrying out thermostat 97 and cooling-water temperature sensor 98, the mounting or dismounting of thermostat 97 and cooling-water temperature sensor 98 only need change the cover member and can realize simply, and water-cooled and air cooling both sides are suitable for easily.

In addition, because at the integrally formed spark plug support of cover member, so, any occasion in the type of cooling of water-cooled and air cooling, for spark plug being set at suitable calorific value, the main structure that need not change cylinder head can be easily corresponding.

Because unwanted parts and the parts concentrated area when needing to change are installed to the 1st cover member 9 during with air cooling, so the main structure that does not change cylinder block 4 and cylinder head 5 self can easily be used for air cooling.

Be applicable to the internal-combustion engine 101 of air-cooling type according to Figure 17-Figure 21 explanation below.

Water-cooled engine 101 substantially by lower crankcase 103, cylinder block 104, cylinder head 105, and cylinder front cover 106 constitute, lower crankcase 103 and cylinder front cover 106 are identical with above-mentioned lower crankcase 3 and cylinder front cover 6, cylinder block 104 and cylinder head 105 do not change aspect essential structure with above-mentioned cylinder block 4 and cylinder head 5, only are that cooling construction has some differences.

That is,,, carry out simple perforate processing etc., thereby can make by using the metal pattern the same and locally utilizing logical pin of casting to cast with water-cooled above-mentioned cylinder block 4 for air-cooling type cylinder block 104.

For air-cooling type cylinder head 105, use the metal pattern the same with water-cooled above-mentioned cylinder block 5, cast in the part with not using the logical pin of casting, carry out some perforate processing etc., thereby can make.

With regard to cylinder block 104, towards the water jacket 70 of the cylinder portion of above-mentioned cylinder block 4 from the recessed recess 72,73,74 (with reference to Fig. 8) that is provided with of foreign side with going out for being used for casting the casting mold of cylinder block by replacing the recess that the logical pin of casting connects, by connecting this recess by the logical pin of casting, as shown in Figure 19, be communicated to air with the suitable position of water jacket and overlap 110 ground and form air introducing port 112 in front, form air export mouth 113,114 in the back.

That is, water-cooled water jacket 70 is overlapped 110 according to former state as air.

In the occasion of this cylinder block 104, being processed to form the circular holes that connect towards air cover 110 again at a side's of cylinder portion sidewall is air export mouth 115.

Face water jacket 70 perforates in water-cooled cylinder head 5 in the past and be processed to form cooling water importing road 71, and under air-cooling type, do not need this processing.

Therefore, the air that imports to cylinder hole ambient air cover 110 from the air introducing port 112 that leads to the front from behind air export mouth 113,114 and the air export mouth 115 of side derive, a part flows to the air cover 120 of cylinder head 105 from the air cover 110 of cylinder block 104.

Can use same-sign with the shared member of above-mentioned water-cooled engine 1.

In water-cooled engine 101, do not add to device, therefore, do not exist and add to relevant member in valve train.

As shown in figure 18,, the cooling fan 130 of big blade is installed, is covered this cooling fan 130 from the place ahead by fan cover 131 at the antetheca of the external rotor 37b of the alternator 37 of being located at the bent axle 2 that protrudes into these cylinder block 104 the place aheads.

As shown in figure 17, fan cover 131 constitutes by the rounded portions 131a that circularly covers lower crankcase 103 and cylinder block 104 the place aheads at bent axle 2 centers substantially with from the extension 131b that a part of coating gas cylinder cap 105 of rounded portions 131a extends to the 2nd cover member 109 partially, forms big circular air in the central authorities of rounded portions 131a and is taken into a mouthful 131c.

The above-mentioned air introducing port 112 of extension 131b coating gas cylinder body 104 fronts of fan cover 131.

Therefore, the air introducing port 112 of cylinder block 104 is owing to covering at fan in 131 towards cooling fan 130 sides, so the air that can effectively the air that is sucked by cooling fan 130 and blow be imported to cylinder block 104 overlaps 110.

On the other hand, the extension 131b of fan cover 131 is connected to the 2nd cover member 109 of opening of the air cover 120 of coating gas cylinder cap 105, part by cooling fan 130 inhaled airs is guided by extension 131b, imports to the air cover 120 of cylinder head 105 from the 2nd cover member 109.

The structure of cylinder head 105 is identical with above-mentioned cylinder head 5 basically, but as Figure 20 with do not add to pipe as shown in Figure 21, above-mentioned add to pipe 55 towards firing chamber 5a opening, make mouthful being closed of adding to that valve 52 connects by the logical processing of casting, as adding to substituting of pipe 55, the air cover 120 that is communicated with cylinder head 105 casts onto air delivery line 121 in the cylinder head 105 with outside.

That is, air delivery line 121 is communicated to the air outlet slit 105b of the amalgamation face of being located at as shown in figure 21 like that from the air cover 120 of cylinder head 105.

In addition, the 2nd cover member 109 of the opening of the air of closed cylinder lid 105 cover 120 is used to install the spark plug support of spark plug except having, and does not install and is connected thermostat, cooling-water temperature sensor, standby pipes etc.

This internal-combustion engine 101 is owing to have above such inside cooling construction, so, the air that is drawn into by cooling fan 130 in the fan cover 131 that covers the front imports to air cover 110 from the air introducing port 112 of cylinder block 104, around the cooling cylinder hole, a part is discharged to the outside from air export mouth 113,114,115, remaining part enters into the air cover 120 of cylinder head 105 sides, around the cooling fuel chambers 105a, then from this air cover 120 air delivery line 121 of flowing through, be discharged to the outside from air outlet slit 105b by gap then with the amalgamation face of cylinder block 104.

On the other hand, be drawn in the fan cover 131 and the air that is directed to extension 131b is guided to the air cover 120 of cylinder head 105 from the 2nd cover member 109, around the cooling fuel chambers 105a, be discharged to the outside through air delivery line 121 equally by cooling fan 130.

This internal-combustion engine 101 is except having above such inside air cooling structure, and also the convex outer surfaces in cylinder block 104 and cylinder head 105 is provided with a plurality of cooling fin.

Desired area in the cylinder block of water-cooled internal combustion engine is provided with air introducing port 112 and air export mouth 113,114,115 as described above, form the simple processing of air delivery line 121 by the opening place that adds to pipe that changes cylinder head, do not change main cooling construction and promptly can be used as the air cooling internal-combustion engine.

In two-wheeled occasion, vehicle body is lighter, and the internal-combustion engine of air-cooling type is more suitable, and Figure 22 and Figure 23 illustrate and above-mentioned water-cooled engine 101 be equipped on two-wheeled 200 example.

This two-wheeled 200 is a small motorcycle type motorbicycle, from the beginning vehicle frame is managed 201 and is stretched out to expansion pairing left and right main frame 202 to the left and right towards the below, be bent to form horizontal part towards the rear in the lower end, side's bending constitutes

rearward end

202a, 202a obliquely at the rear portion, between this left and right sides rearward

end

202a, 202a, set up crossbeam 202b, be connected to this left and right sides rearward

end

202a, 202a ground and extend towards the rear portion oblique upper back framework 203 is set.

Head pipe 201 turns to handle 205 by steering shaft 204 supportings, from the bottom of steering shaft 204 around extending forearm 206 towards oblique below to ground, right side, by connecting rod 207 from unilateral component brought forward wheel 208.

This water-cooled engine 101 that is configured to the oblique rearward end 202a rear of the square neck obliquely of main frame 202 is for shaking the Set Type internal-combustion engine, extend towards the rear from the rear side mating face of lower crankcase 3 and speed changer case 210 to be set, gear-box 210a supporting wheels 211 in its back-end.

This water-cooled engine 101 is between left and right sides rearward end 202a, the 202a of main frame 202 front of covering fan cover 131, and speed changer case 210 towards the rear, is connected cylinder head 105 and supports to vehicle frame to tilt near the level posture of position substantially towards the right side.

Back projection along left and right sides rearward end 202a, the 202a of main frame 202 is provided with carriage 212,212, this water-cooled engine 101 is supported on the motor pivot 213,213 of this carriage 212,212 with the front portion, can joltily be supported with trailing wheel 211 easy on and off.

Gear-box 210a and the above-mentioned posterior bumper 214 of afterwards installing between the framework 203 at supporting wheels 211.

Above this water-cooled engine 101, case 220 supportings of accommodating of the helmet etc. are arranged at back framework 203, but and freely openable this accommodate case 220 the top opening vehicle seat 221 is set.

Between the left and right horizontal portion of main frame 202, set up supporting fuel case 215, cover footrest 222 thereon.

From the front portion of steering shaft 204 by front shroud 223 and shank protection apron 224 covering main frames 202, the top of front-wheel 208 is covered by front mudguard 225.

The fan cover 131 of the front of water-cooled engine 101 is between left and right sides rearward end 202a, the 202a of main frame 202, so, be taken into mouthful 131c at the air of fanning cover 131 front openings and be provided with opening (with reference to Figure 22), can easily be taken into air in the space of accommodating 215 of case 220 and fuel tanks.

More than carry water-cooled engines 101 at two-wheeled 200 of light vehicle body, be used for water-cooled internal-combustion engine 1 but also can carry at the heavier motor tricycle of vehicle body and motor-driven four-wheel wagon.

Figure 24 is illustrated in the example that motor tricycle 300 carries above-mentioned water-cooled engine 1.

Main frame 302 shared above-mentioned two-wheeled 200 main frames 202 that use of this motor tricycle 300, the supporting construction of front-wheel 308 is also identical with above-mentioned two-wheeled 200.

From the rearward end extension of main frame 302 back framework 303 is set, by 304 supportings of motor pivot this water-cooled engine 1 is installed anteriorly at the carriage that is installed on this back framework 303.

This water-cooled engine 1 is also for shaking Set Type, and speed changer case 310 is integrated with lower crankcase 3 and is wholely set the case of differential 311 in the rear end of speed changer case 310, from the case of differential 311 towards about the axletree setting-in trailing wheel 312,312 that protrudes.

The secondary framework 307 of the pairing left and right of extending from the Nai Shi plate 306 between the rear portion that is set up in main frame 302 towards the rear portion oblique upper is installed posterior bumper 308 through water-cooled engine 1 between the rear end of the secondary framework 307 about connecting and the case of differential 311.

The space of 307,307 of secondary frameworks can joltily be installed with trailing wheel 312,312 easy on and off at rear portion about the radiator 7 of front that is equipped on the water-cooled engine 1 of motor tricycle 300 was in.

Figure 25 is illustrated in the example that motor-driven four-wheel wagon 400 carries this water-cooled engine 1.

The main frame 402 of this motor-driven four-wheel wagon 400 also can be shared and above-mentioned two-wheeled 200 and the identical framework of main frame 202,302 of above-mentioned motor tricycle 300 uses.

The left and right horizontal portion of this main frame 402 is strengthened by the side pipe 403,403 that points to fore-and-aft direction, and framework 405,405 before the front end of this side pipe 403,403 is provided with towards the place ahead extension by buffering framework 404 sets up front bumper 406 between its front end.

From near steering shaft 407 underparts towards about the preceding end bearing front-wheel 409,409 of forearm 408,408 of expansion, installation anterior bumper 410,410 between each forearm 408,408 and buffering framework 404.

Rear end at above-mentioned side pipe 403,403 erects the column jecket 411 that the connection front end is set in the side obliquely agley.

In the rear end of the pairing left and right postbrachium 413,413 that extends towards the rear from the Nai Shi plate 412 that is set up between main frame 402 rear portions, this water-cooled engine 1 is installed anteriorly by moving 414,414 supportings of motor pivot.

This water-cooled engine 1 is the same with the internal-combustion engine that is equipped on above-mentioned motor tricycle 300, speed changer case 420 and lower crankcase 3 be integrated and be wholely set the case of differential 421 in the rear end of speed changer case 420, from the case of differential 421 towards about the axletree setting-in trailing wheel 422,422 that protrudes.

Just stretch out framework 415,415 after the pairing left and right obliquely from the rearward end of main frame 402, installation posterior bumper 416,416 between the left and right sides axletree sleeve of this back framework 415,415 and the case of differential 421.

In the water-cooled engine 1 that is equipped on motor-driven four-wheel wagon 400 like this, the radiator 7 of front towards front space, can joltily be installed with trailing wheel 422,422 freedom between postbrachium 413,413.

As described above, this internal-combustion engine need not change main structure and promptly all can easily obtain using in the occasion of water-cooled and air cooling, can shared internal combustion engine main body, be equipped on two-wheeled 200 as combinations such as air-cooling type and speed changers, on the other hand, can easily be equipped on motor tricycle 300, motor-driven four-wheel wagon 400 as water-cooled.

Claims

1. internal-combustion engine cooling construction, it is characterized in that: the stream around the firing chamber of stream around the cylinder hole of cylinder block and cylinder head is communicated with, form cooling flowing path, by sealing the opening portion of the stream of above-mentioned cylinder head towards the outside by cover member watertight ground, can be with above-mentioned cooling flowing path as water jacket, make the cooling water circulation, constitute water-cooled internal combustion engine, simultaneously, can be with above-mentioned cooling flowing path as the air cover, air is flow through, constitute the air cooling internal-combustion engine;

Above-mentioned cover member and thermostat tank during as water-cooled internal combustion engine form as one.

2. internal-combustion engine cooling construction as claimed in claim 1 is characterized in that: above-mentioned cover member and spark plug support during as water-cooled internal combustion engine form as one.

3. internal-combustion engine cooling construction as claimed in claim 1 is characterized in that: constitute the air cooling internal-combustion engine; One side in above-mentioned cylinder block is provided with the air introducing port that overlaps connection and opening to above-mentioned cylinder-bore ambient air, above-mentioned air introducing port and air-supply upstream side in opposite directions, in the another side setting of above-mentioned cylinder block from the air export mouth of above-mentioned air cover to external communications and opening; The air that imports to above-mentioned air introducing port flows through above-mentioned air cover, around the cooling cylinder-bore, flows out from above-mentioned air export mouth.

4. internal-combustion engine cooling construction as claimed in claim 3 is characterized in that: the fan of supporting blowing fan covers the one side of coating gas cylinder body at least, disposes said fan opposite to each other with above-mentioned air introducing port.