CN1337522A

CN1337522A - Cooling structure of internal combustion engine

Info

Publication number: CN1337522A
Application number: CN 01124873
Authority: CN
Inventors: 轮违薰; 新妻桂一郎; 冈野则明; 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: 2002-02-27
Anticipated expiration: 2021-08-03
Also published as: CN1145742C; ITTO20010779A1; TW482857B; ES2224761B1; JP2002047934A; ES2224761A1

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.

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, the one side of above-mentioned cylinder block have the opening that is communicated to above-mentioned cylinder-bore ambient air cover and with air-supply upstream side air introducing port in opposite directions, another side in above-mentioned cylinder block has the air export mouth that is communicated to outside opening from above-mentioned air cover, 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 cover of supporting blowing fan covers on the one side of cylinder block 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.

The specific embodiment

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

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

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

Fig. 1 is all front elevations of this internal combustion engine 1, and Fig. 2 is its subsequent figures, and Fig. 3 is and bent axle 2 The sectional drawing that dissects, Fig. 4 illustrate to comprise the section that the plane of bent axle 2 dissects and its with meeting at right angles The section of its member.

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

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

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

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

As shown in Figure 1, stretch out blast pipe 13 from the sidewall of the front side of cylinder head 5, from cylinder head 5 The position of cylinder front cover 6 of top side sidewall protrude breather pipe 14 towards the top, from the 1st cover member 9 Protrude the serum cap 23 of spark plug 22.

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

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

In addition, in the back that adds to device 8 o 19 that fuel feeding is used is installed, from cylinder head 5 The sidewall of rear side further stretch out air inlet pipe 20.

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

As shown in Figure 3 and Figure 4, the cylinder jacket 30 in the cylinder section of cylinder block 4 can be free to slide the ground embedding Close reciprocating piston 31, connected the crank-pin 2a of this piston 31 and bent axle 2 by connecting rod 32.

As shown in Figure 4, but bent axle 2 by base bearing 35,36 free rotaring ground supportings at a pair of axle Bolster 33,34, the bent axle 2 that protrudes at the front side sidewall that connects lower crankcase 3 and cylinder block 4 The front portion arranges alternating current generator 37, is fixedly mounted on song around the rotating outer rotor 37b of inner stator 37a The front end of axle 2 is installed cooling fan 38 in the front of outer rotor 37b.

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

Connect coaxially in the end of the protrusion that is supported on base bearing 36 of bent axle 2 and to be flush-mounted in above-mentioned circle The pump driving shaft 24a of the trochoid formula oil pump 24 in hole 15.

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

The timing gears 40 that are flush-mounted in bent axle 2 rear ends are nibbled with the cam wheel that is flush-mounted in camshaft 41 Close, and camshaft 41 revolutions 1 are turned to when bent axle 2 every revolutions 2 are turned to.

As shown in Figure 3, form 3 cams with camshaft 41, contact respectively coaxially The 1st intake rocker (not shown), the 1st that is supported on the 1st rocker arm shaft 42 adds to rocking arm 43, the 1st exhaust rocker arm 44.

On the other hand, prop up coaxially in the 2nd rocker arm shaft 45 in cylinder head 5 and honour inlet valve 51 and carry out Open the 2nd intake rocker (not shown) that valve drives, open to adding to valve 52 that valve drives The 2nd add to Rocker arm 46, and exhaust valve 53 left the 2nd exhaust rocker arm 47 that valve drives, by Air inlet pull bar (not shown) connects between the 1st, the 2nd intake rocker, connects by adding to pull bar 48 Connect the 1st, the 2nd and add to Rocker arm 43,46, connect the 1st, the 2nd exhaust by exhaust pull bar 49 and shake Arm 44,47.

When turning to, bent axle 2 every revolutions 2 drive revolution 1 camshaft that turns to by above valve actuating mechanism 41 revolution by each the 1st rocking arm, pull bar, the 2nd rocking arm drive into valve 51, add to valve 52, Exhaust valve 53, in regulation constantly to air inlet pipe 20, add to the combustion chamber 5a of pipe 55, blast pipe 13 The peristome of side opens and closes.

As shown in Figure 4, be formed at the combustion chamber 5a opening of cylinder head 5 by court in cylinder head 5 castings The air inlet pipe 20 that consists of of tubing, add to pipe 55, blast pipe 13, mix being formed at air inlet from protrusion Fuel and air amount that the Fuelinjection nozzle 56 of the installation portion 20a of pipe 20 sprays supply to combustion Burn chamber 5a, add to add to air.

Be located at bent axle 2 the 2nd crank arm 2b periphery a driven wheel 57 with can be freely to rotate Be installed on a driven gear 58 engagement of the starting clutch 60 of output shaft 25, bent axle 2 moving Power 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 top view of cylinder block 4 from the cylinder axis direction of principal axis, and Fig. 6 is front view (figure 5 VI is to view), Fig. 7 is rearview (VII of Fig. 5 is to view).

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

From the front of this cylinder section towards this water jacket 70 recessed go out to form 1 circular depressions 72 (with reference to Fig. 6, 8), go out to form the

recess

73,74 of 2 circles (with reference to figure from the back of cylinder section towards water jacket 70 is recessed 7,8).

In the occasion as air-cooled internal combustion engine, this

recess

72,73,74 is being used for casting for passing through Replace and the part as the air gateway of perforation with the logical pin of casting in the casting mold of cylinder block.

In addition, cylinder block 4 with the composition surface of lower crankcase 3 in the part of stretching out towards a side and cylinder section The projected side wall setting has the installation bracket 75 of big circular hole, installs at this installation bracket 75 and adds to dress Put 8.

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

By the blast pipe 13, the air inlet pipe 20 that are communicated with the combustion chamber 5a of cylinder head 5, add to pipe 55, and install combustion chamber 5a that the installing 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 composition surface.

The space that consists of this water jacket 80 has rectangle as shown in Figure 9 in a side of cylinder head 5 Opening 81 cooperates the 1st cover member 9 on its opening composition surface 83, and watertight ground is installed, obturation Water jacket 80.

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

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

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

What cast onto cylinder head 5 adds to pipe 55 as shown in Figure 11 from the opening bending of combustion chamber 5a To the connection opening 5b that is located at identical amalgamation face, stretch out from adding to device 8 in connection opening 5b connection The above-mentioned discharge pipe 18 that adds to, supply with to combustion chamber 5a and to add to gas.

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

The 1st cover member 9 arranges on the composition surface 91 that is coupled to composition surface 83 as shown in Figure 13 The groove bar 91a of embedding sealing material, by the outer wall 92 that protrudes from this composition surface 91 towards the outside in the inboard Space 90 in forming.

Such as Figure 12 and shown in Figure 13, protrude in space 90 inwardly from the left and right directions central portion of outer wall 92 The spark plug support 93 of the more tubular that is used for installation spark plug 22 than composition surface 91 more projectedly Form.

Side in the left and right side of outer wall 92 installs thermostat 97, the above-mentioned cooling of integrally formed connection The maintenance case 94 of water tube hose 12 and the opposing party that is connected connect the connecting box 95 of standby pipes 21, and with above-mentioned Spark plug support 93 forms the mounting cylinder section 96 of cooling-water temperature sensor 98 adjacently.

As shown in figure 16, at the 1st cover member 9 thermostat 97, cooling-water temperature sensor 98, for subsequent use are installed Pipe 21 enters

composition surface

83,91 at the opening of the water jacket 80 of cylinder head 5 by seal mutually Row cooperates, and covers members 9 by bolt 99 at 4 jiaos the fastening the 1st.

The 1st cover member 9 by seal with periphery composition surface 91 watertights join cylinder head 5 to Composition surface 83 time, will protrude into the front end setting-in of inner spark plug support 93 to cylinder The installing hole 82 of lid 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 Attitude makes cooling water circulation.

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

Make the water pump 10 of this cooling water circulation be installed on as described above the front that adds to device 8, as Fig. 1 connects with the pump cover 10b of being connected at the pump case 10a that covers this water pump 10 from the place ahead Cooling water flexible pipe 11.

Pump case 10a and pump cover 10b extend to the part of cylinder block 4, cover above-mentioned cylinder block 4 before The cooling water of face imports road 71 (with reference to Fig. 1), and it is logical to import road 71 formation cooling waters towards this cooling water Road 10c (with reference to Fig. 4).

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

By cooling water flexible pipe 11 cooling water is drawn into pump case from radiator 7 by the driving of water pump 10 10a imports the water jacket that road 71 supplies to cylinder block 4 by cooling water path 10c from cooling water 70, carry 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 from cylinder Body 4 is transferred to the water jacket 80 of cylinder head 5, the combustion chamber 5a of cold gas cylinder cap 5.

Enter into the cooling water in interior space 90 of the 1st cover member 9 from the water jacket 80 of cylinder head 5 by perseverance Temperature device 97 is regulated 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 circulation path, circulate cold gas cylinder body 4 Hes Cylinder head 5.

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

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

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

Be applicable to the internal combustion engine 101 of air-cooled 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 consists of lower crankcase 103 and cylinder front cover 106 and above-mentioned lower crankcase 3 and cylinder Protecgulum 6 is identical, cylinder block 104 and cylinder head 105 and above-mentioned cylinder block 4 and cylinder head 5 Not changing aspect essential structure, only is that cooling construction has some differences.

That is, for air-cooled type cylinder block 104, the same with water-cooled above-mentioned cylinder block 4 by using Metal pattern and local utilize the logical pin casting of casting, carry out simple perforate processing etc., thereby can advance Row is made.

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

With regard to cylinder block 104, recessedly towards the water jacket 70 of the cylinder section of above-mentioned cylinder block 4 from foreign side go out The

recess

72,73,74 (with reference to Fig. 8) that ground arranges is can be at the casting mold that is used for the casting cylinder block The recess that connects by replacing the logical pin of casting is by connecting this recess by the logical pin of casting, as shown in figure 19 Like that, being communicated to air with the suitable position of water jacket overlaps 110 ground and forms in front the air introducing port 112, form in the back air export mouth 113,114.

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

In the occasion of this cylinder block 104, again be processed to form towards the air cover at a side's of cylinder section sidewall 110 circular holes that connect are 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-cooled type, do not need this processing.

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

Can use same-sign with the member that above-mentioned water-cooled engine 1 shares.

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

As shown in figure 18, at the alternative electric generation of being located at the bent axle 2 that protrudes into these cylinder block 104 the place aheads The antetheca of the outer rotor 37b of machine 37 is installed the cooling fan 130 of big blade, by fan cover 131 in the past The side covers this cooling fan 130.

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

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

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

On the other hand, the extension 131b of fan cover 131 is connected to the air cover of coating gas cylinder cap 105 The 2nd cover member 109 of 120 opening, the part of the air that is sucked by cooling fan 130 is by stretching out The 131b of section guiding, the air that imports to cylinder head 105 from the 2nd cover member 109 overlaps 120.

The structure of cylinder head 105 is basically identical with above-mentioned cylinder head 5, but such as Figure 20 and Figure 21 institute Show not add to like that pipe, above-mentioned add to pipe 55 towards combustion chamber 5a opening, made by the logical processing of casting What add to that valve 52 connects mouthful be closed, and as adding to substituting of pipe 55, is communicated with cylinder head 105 Air cover 120 casts onto air delivery line 121 in the cylinder head 105 with outside.

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

In addition, the 2nd cover member 109 of the opening of the air cover 120 of closed cylinder lid 105 is except tool Be useful on outside the spark plug support that spark plug is installed, do not install and be connected thermostat, water temperature sensing Device, standby pipes etc.

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

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

This internal combustion engine 101 is except having above such inside air cooling structure, also in cylinder block 104 With the convex outer surfaces of cylinder head 105 a plurality of cooling fins are set.

Desired area in the cylinder block of water-cooled internal combustion engine arranges air introducing port 112 Hes as described above Air export mouth 113,114,115 is by changing the opening place forming sky that adds to pipe of cylinder head The simple processing of gas delivery line 121 does not change main cooling construction and namely 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-cooled type is more suitable, Figure 22 and Figure 23 illustrates above-mentioned water-cooled engine 101 is equipped on two-wheeled 200 example.

This two-wheeled 200 is small motorcycle type motorbicycle, and vehicle frame from head tube 201 left Right expansion ground stretches out pair of right and left main truss 202 towards the below, is bent to form towards the rear level in the lower end Section, side's bending consists of

rearward end

202a, 202a obliquely at the rear portion, in this left and right sides rearward end Set up crossbeam 202b between 202a, 202a, be connected to this left and right sides rearward

end

202a, 202a ground backwards Section's oblique upper extension arranges rear framework 203.

Head tube 201 turns to handle 205 by steering spindle 204 supporting, from the bottom of steering spindle 204 around to Ground, right side extends forearm 206 towards oblique below, takes turns 208 by connecting rod 207 from the unilateral component brought forward.

Be configured in this water-cooled at the oblique rearward end 202a rear of the obliquely square neck of main truss 202 Combustion machine 101 extends from the rear side composition surface of lower crankcase 3 towards the rear for shaking the Set Type internal combustion engine Speed changer case 210 is set, gear-box 210a supporting wheels 211 in its back-end.

This water-cooled engine 101 make the front of covering fan cover 131 be in main truss 202 about after Between

end

202a, 202a, with speed changer case 210 towards the rear, substantially to tilt to water towards the right side The posture of position supports to vehicle frame with cylinder head 105 connections near flat.

Along the back projection of left and right sides rearward end 202a, the 202a of main truss 202 arrange

carriage

212, 212, this water-cooled engine 101 is supported on this carriage 212,212 engine pivot with the front portion 213,213, can joltily be supported with trailing wheel 211 easy on and off.

Between the gear-box 210a of supporting wheels 211 and above-mentioned rear framework 203, posterior bumper is installed 214.

Above this water-cooled engine 101, after containing case 220 supportings of the helmet etc. are arranged at Framework 203, but and the upper opening of this containing case 220 of freely openable vehicle seat 221 is set.

Between the left and right horizontal section of main truss 202, set up supporting fuel case 215, cover leg rest thereon Plate 222.

From steering spindle 204 by front shroud 223 and protective boards for legs 224 cover main truss 202 before Section, 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 in the left and right sides rearward end of main truss 202 Between 202a, 202a, so the air that covers 131 front openings at fan is taken into mouthful 131c at containing case 220 and the space of 215 of fuel tanks be provided with opening (with reference to Figure 22), can easily be taken into sky Gas.

More than carry water-cooled engines 101 at two-wheeled 200 of light vehicle body, but also can The motor tricycle that vehicle body is heavier and motor-driven carriage carry and are used for water-cooled internal combustion engine 1.

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

The main truss 302 of this motor tricycle 300 shares the above-mentioned two-wheeled 200 main structures that use Frame 202, the supporting construction of front-wheel 308 are also identical with above-mentioned two-wheeled 200.

Rear framework 303 is set, framework 303 after being installed on this from the rearward end extension of main truss 302 Carriage by engine pivot 304 supporting this water-cooled engine 1 is installed anteriorly.

Also for shaking Set Type, speed changer case 310 is combined into lower crankcase 3 this water-cooled engine 1 One also 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.

About extending from the Nai Shi plate 306 between the rear portion that is set up in main truss 302 towards the rear portion oblique upper A pair of secondary framework 307 is through water-cooled engines 1, the rear end of the secondary framework 307 about connecting with Posterior bumper 308 is installed between the case of differential 311.

About the radiator 7 of front that is equipped on the water-cooled engine 1 of motor tricycle 300 is in Secondary framework 307,307 space can be shaken with trailing wheel 312,312 easy on and off at rear portion Install movingly.

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

The main truss 402 of this motor-driven carriage 400 also can share and above-mentioned two-wheeled 200 and upper State main truss 202 that motor tricycle 300 uses, 302 identical frameworks.

The left and right horizontal section of this main truss 402 is strengthened by the side pipe 403 that points to fore-and-aft direction, 403, This side pipe 403,403 front end extend towards the place ahead by buffering framework 404 arrange before framework 405,405, between its front end, set up front bumper 406.

From near steering spindle 407 bottoms towards about the forearm 408,408 front end bearing of expansion Front-wheel 409,409, each forearm 408,408 and buffering anterior bumper is installed between the framework 404 410,410.

The side erects agley the post that connects front end is set obliquely in above-mentioned side pipe 403,403 rear end Pipe 411.

After the pair of right and left of extending towards the rear from the Nai Shi plate 412 that is set up between main truss 402 rear portions This water-cooled is installed by moving 414,414 supportings of engine pivot in arm 413,413 rear end anteriorly Formula internal combustion engine 1.

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

Just stretch out obliquely framework 415,415 after the pair of right and left from the rearward end of main truss 402, Should after framework 415,415 and the left and right sides axletree sleeve of the case of differential 421 between posterior bumper is installed 416,416.

In the water-cooled engine 1 that is equipped on so motor-driven carriage 400, the radiator 7 of front Between postbrachium 413,413, towards front space, can be with trailing wheel 422,422 freedom Joltily install.

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

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.

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

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

4. internal-combustion engine cooling construction as claimed in claim 1, it is characterized in that: constitute the air cooling internal-combustion engine, the one side of above-mentioned cylinder block have be communicated to above-mentioned cylinder-bore ambient air cover ground opening and with air-supply upstream side air introducing port in opposite directions, have from above-mentioned air cover at the another side of above-mentioned cylinder block and to be communicated to the air export mouth of opening externally, the air that imports to above-mentioned air introducing port flows through above-mentioned air cover, around the cooling cylinder-bore, from outflows such as above-mentioned air export mouths.

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