CN1088501C

CN1088501C - Cooling device of V-shape internal combustion engine list

Info

Publication number: CN1088501C
Application number: CN99118578A
Authority: CN
Inventors: 神户敬司; 野村明史
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 1998-09-14
Filing date: 1999-09-09
Publication date: 2002-07-31
Anticipated expiration: 2019-09-09
Also published as: EP0987410B1; CN1247935A; JP4057714B2; DE69905667D1; JP2000087743A; EP0987410A2; EP0987410A3; DE69905667T2

Abstract

To enable successive supply of coolant discharged from the water pump into the water jacket in the first and second banks and to the radiator by means of non-prominent piping in the cooling system of the V-type internal combustion engine. A discharge pipe 76 of a water pump 62 is communicated to a water jacket 241 of a first bank 41. The bottom portion of the water jacket 241 of the first bank 41 is communicated to the bottom portion of the water jacket 241 of a second bank 42 via a bottom-portion communicating water pipe 773. The upper portion of the water jacket 241 of the first bank 41 is communicated to a junction chamber 80 which is formed in the second bank 42 and runs in line with its water jacket 242 via an upper-portion communicating water pipe 774. The bottom-portion communicating water pipe 773 and the upper- portion communicating water pipe 774 are positioned in the root portion of the banks 41, 42, respectively.

Description

The cooling unit of V-type internal combustion engine

The present invention relates in the 1st and the 2nd combination of V-type internal combustion engine, form the cooling unit of the V-type internal combustion engine of water jacket.

In the prior art as the cooling unit of such V-type internal combustion engine, for example Japan Patent disclose shown in the clear and 58-96121 communique like that, two output tubes are set on water pump, two upstream water pipes of bottom of the water jacket that is communicated to the 1st and the 2nd combination respectively are connected on these output tubes, two downstream water pipes on the top of the water jacket that is communicated to the 1st and the 2nd combination respectively are connected the person is known on the shared water pipe of the import that is connected in radiator.

In the above-mentioned formation of prior art, because need long respectively two upstream water pipes and downstream water pipe, so their pipe arrangement is very showy, outward appearance is good hardly.

The present invention makes in light of this situation, and its purpose is to provide a kind of cooling unit of V-type internal combustion engine, and this cooling unit can supply to the water jacket and the radiator of the 1st and the 2nd combination successively with the cooling water that not too showy pipe arrangement is exported water pump.

To achieve these goals, the cooling unit of V-type internal combustion engine of the present invention, in the 1st and the 2nd combination of V-type internal combustion engine, form the 1st and the 2nd water jacket, it the 1st is characterised in that, the output tube of water pump is communicated to the water jacket of the 1st combination, in addition, the water jacket bottom that the water jacket bottom of the 1st combination is communicated with cross current to the 2 combinations via the bottom, and then, the water jacket top of the 1st combination is communicated with cross current to the chamber, interflow that forms and be connected in the top of its water jacket in the 2nd combination via top, bottom and top are communicated with the paddy portion that water pipe is configured in two combinations.

According to this one the 1st feature, the cooling water that water pump is exported, at first supply to the water jacket of the 1st combination, then be communicated with the water jacket that water pipe also supplies to the 2nd combination via the bottom, the cooling water flow that has cooled off the 1st combination is communicated with water pipe and flows to the chamber, interflow to top, flow out to radiator then with the cooling water interflow of having cooled off the 2nd combination, can supply to cooling water equably the water jacket of the 1st and the 2nd combination.

And because to be communicated with water pipe just passable with relatively shorter pipe arrangement bottom and top, and they are configured in two paddy portions between combination, and are unshowy so be hidden between two combinations, do not undermine the outward appearance of internal-combustion engine.

In addition, the present invention is on the basis of above-mentioned feature, and it the 2nd is characterised in that, in the chamber, interflow, the thermostat (サ-モス Star ト) that opens and closes its outlet is set, and the outlet connection of this chamber is communicated to the import of radiator.

According to this one the 2nd feature, because thermostat is arranged in the chamber, interflow at the cooling water interflow of having cooled off the 1st and the 2nd combination, so thermostat detects the average water temperature of two combinations really, can carry out the suitable water temperature control of two combinations.And need can not realize the simplification of pipe arrangement at the pipe arrangement of thermostat.

And then, the present invention is on the basis of the 1st or the 2nd feature, it the 3rd is characterised in that, when this internal-combustion engine is contained on the two-wheeled motor vehicle, configuration before and after the 1st and the 2nd combination, on the outstanding upper front surface that is arranged on the 2nd combination of the outlet connection of chamber, interflow, this outlet connection via the import of cross current to the radiator in front that is arranged on internal-combustion engine.

According to this one the 3rd feature, can reduce the bending that connects the water pipe between chamber, interflow and radiator, can suppress its flow resistance very for a short time, realize the improvement of outward appearance simultaneously.

Have again, on the basis of the present invention's any one in the 1st～the 3rd feature, it the 4th is characterised in that, the top sub that connects top connection water pipe is engaged in the 2nd combination, on this top sub, integrally form to be communicated to the bypass outlet connection of chamber, interflow than its little diameter, the Bypass hose of the suction pipe that is connected in water pump is connected to this pass-out mouth joint on one side.

According to this one the 4th feature, integrated by the top sub that engaged and bypass outlet connection in the 2nd combination can be realized the simplification of pipe distribution operation.

Have, the present invention is on the basis of the 4th feature again, and it the 5th is characterised in that, in the bypass water route, is clamping the hot room of the Carburetor of each combination.

According to this one the 5th feature,, can prevent the freezing of Carburetor of two combinations by means of the cooling water that flows through the bypass water route.

Accompanying drawing is simply described as follows:

Fig. 1 is the side view that has carried the two-wheeled motor vehicle of V-type internal combustion engine of the present invention.

Fig. 2 is the side view of above-mentioned internal-combustion engine.

Fig. 3 is the amplification longitudinal section along the 3-3 line intercepting of Fig. 2.

Fig. 4 is the sectional view along the 4-4 line intercepting of Fig. 3.

Fig. 5 is the sectional view along the 5-5 line intercepting of Fig. 2.

Fig. 6 is the cooling water system figure of above-mentioned internal-combustion engine.

Fig. 7 is the sectional view along the 7-7 line intercepting of Fig. 2.

Fig. 8 is the front and rear timing transmission device enlarged view on every side of Fig. 3.

Fig. 9 is the variable-speed motor enlarged view on every side of Fig. 3.

Figure 10 is the exhaust system plan view on every side of above-mentioned internal-combustion engine.

Figure 11 is the cylinder head plan view of the rear portion combination of above-mentioned internal-combustion engine.

Figure 12 be Fig. 9 12 to view.

Below, the one embodiment of the present of invention shown in illustrate and implement form of the present invention with reference to the accompanying drawings.

Fig. 1 is the side view that has carried the two-wheeled motor vehicle of V-type internal combustion engine of the present invention, Fig. 2 is the side view of above-mentioned internal-combustion engine, the 3rd, along the amplification longitudinal section of the 3-3 line of Fig. 2 intercepting, Fig. 4 is the sectional view along the 4-4 line intercepting of Fig. 3, Fig. 5 is the sectional view along the 5-5 line intercepting of Fig. 2, Fig. 6 is the cooling water system figure of above-mentioned internal-combustion engine, Fig. 7 is the sectional view along the 7-7 line intercepting of Fig. 2, Fig. 8 is the front and rear timing transmission device enlarged view on every side of Fig. 3, Fig. 9 is the variable-speed motor enlarged view on every side of Fig. 3, Figure 10 is the exhaust system plan view on every side of above-mentioned internal-combustion engine, Figure 11 is the cylinder head plan view of the rear portion combination of above-mentioned internal-combustion engine, Figure 12 be Fig. 9 12 to view.

Moreover so-called all around is meant that the car body with two-wheeled motor vehicle is the benchmark person in the explanation.[integral body of two-wheeled motor vehicle constitutes (with reference to Fig. 1, Fig. 2)]

At the front end of the vehicle frame 1 of two-wheeled motor vehicle M, can connect the front fork that supports front-wheel (all not shown go out) with turning to.In addition, can connect the back vent 3 that supports trailing wheel 2 with swinging up and down, between each rearward end of this back vent 3 and vehicle frame 1, clamp posterior bumper 7 at the rear portion of vehicle frame 1.

At the intermediate portion of vehicle frame 1, carrying and having front and rear combination 4 ₁, 4 ₂V-type internal combustion engine E, fuel tank 5 is installed simultaneously above it.And then, at the rear portion of vehicle frame 1, be connected in fuel tank 5 the rear end main vehicle seat 6a and secondary vehicle seat 6b be installed.

Connect the chain-driven unit 10 between the wheel hub of the output shaft 97 that is connected the variable-speed motor 8 that is provided with above-mentioned internal-combustion engine E and trailing wheel 2, be configured in the left side of trailing wheel 2.Actuating motor 11 is configured in the front lower place of bent axle 15.

Front and rear combination 4 at internal-combustion engine E ₁, 4 ₂Between paddy portion 28 in, disposing and the corresponding front and rear Carburetor 12 that combination connected ₁, 12 ₂In addition, be connected to anterior combination 4 ₁Front and rear portion combination 4 ₂The anterior outlet pipe 13 at rear portion ₁With rear part exhaust pipe 13 ₂, converge and be connected in and clip the opposite side that trailing wheel 2 is configured in aforementioned chain-driven unit 10, be i.e. the front end of the shared exhaust silencer 14 on the right side of trailing wheel.[the overall formation of internal-combustion engine (with reference to Fig. 2, Fig. 3, Fig. 5, Fig. 8)]

The front portion combination 4 of internal-combustion engine E ₁With rear portion combination 4 ₂90 ° are opened and the configuration of ground, front and back around the bent axle 15 that disposes along left and right directions.Bent axle 15 has the single crank portion 16 that crank pin 16a is arranged and is adjacent to the pairing left and right

main journal

17,18 at its two ends, and its

main journal

17,18 is bearing on the crankcase 21 via ball bearing 19,20 respectively.

Front and

rear combination

4 ₁, 4 ₂Have the cylinder block 22 on inclined-plane, front and back that bent axle 15 is engaged in the chevron top of above-mentioned crankcase 21 respectively ₁, 22 ₂, and be engaged in the cylinder head 23 of their upper end ₁, 23 ₂, in each cylinder block 22 ₁, 22 ₂With cylinder head 23 ₁, 23 ₂The a series of water jackets 24 of middle formation ₁, 24 ₂

Cooperate each cylinder block 22 of packing into ₁, 22 ₂Cylinder-bore 25 ₁, 25 ₂Piston 26 ₁, 26 ₂, via connecting rod 27 ₁, 27 ₂Be connected in above-mentioned crank pin 16a.At this moment, the rear portion combination 4 ₂Connecting rod 27 ₂Be adjacent to above-mentioned anterior combination 4 ₁Connecting rod 27 ₁Left and be configured on the above-mentioned crank pin 16a, according to these connecting rods 27 ₁, 27 ₂The amount of the staggering S (Fig. 8) of left and right directions, make rear portion combination 4 ₂Axis with respect to front portion combination 4 ₁Axis stagger left.

As shown in Figure 5, on the outstanding right-hand member in 18 more laterals of main journal to the right of bent axle 15, from its inboard actuation gear 54a that the overrunning clutch 53 of starting transmission gear 94 is installed successively and is connected in a transmission device 54 of clutch 100, configuration simultaneously with being adjacent to each other.At this moment, the external member of overrunning clutch 53 combines with bent axle 15 splines, is fixedly installing starting gear 52 on its inner member.Actuation gear 54a and bent axle 15 bonds are closed.

In addition, as shown in Figure 8, on the outstanding left end in 17 more laterals of main journal left of bent axle 15, from its inboard be installed with successively to drive anteriorly make up 4 ₁Valve driving cam axle 41 ₁Anterior timing transmission device 46 ₁ Driving timing sprocket 42 ₁, drive rear portion combination 4 ₂Valve driving cam axle 41 ₂Rear portion timing transmission device 46 ₂ Driving timing sprocket 42 ₂, and the rotor 31 of generator 30, configuration simultaneously with being adjacent to each other.At this moment, rotor 31 closes with bent axle 15 bonds.Relevant two

drive timing sprocket

42 ₁, 42 ₂Mounting structure will address hereinafter.

Be fixed on the inwall of the left cap 33 that engages with the left side of crankcase 21 round stator 32 rotor 31, generator 30.

Form projection 35 on the position of above-mentioned rotor 31 outer circumferential faces, a projection 35 crankshaft position sensor 36 of coordinating to detect the rotational position of bent axle 15 is fixed in the left side of crankcase 21 therewith.The output signal of this crankshaft position sensor 36 is as the control signal of ignition mechanism or the input signal of tachometer.

On bent axle 15 and right-hand members generator 30 opposite sides, be adjacent to right side main journal 18 and supporting starting gear 52 via overrunning clutch 53, and then, be adjacent to these starting gear 52 bonds and closing actuation gear 54a one time.

If constitute as described above, then can assemble front and rear timing transmission device 46 at one stroke in left end one side of

bent axle

15 ₁, 46 ₂, their assembling has become well.This external front and rear timing transmission device 46 that carries out ₁, 46 ₂Maintenance when, as long as the generator 30 in their outside is taken off from bent axle 15, just can carry out its maintenance at an easy rate, to other things without any interference.And, by 30 pairs of two timing transmission devices 46 of generator ₁, 46 ₂In abutting connection with the configuration, be in operation, because from two

timing transmission devices

46 ₁, 46 ₂The oily foam that is splashed hangs on the generator 30, so can cool off it effectively.

In addition, because at the left side of crankcase 21 configuration front and rear

timing transmission device

46 ₁, 46 ₂With generator 30, and at opposite side configuration starting transmission gear 94, a transmission device 54 and a clutch 100, so the weight balancing of crankcase 21 both sides is good, thereby when being contained on the vehicle frame 1, can realize the left and right sides weight balancing of two-wheeled motor vehicle M at an easy rate.[valve power train (with reference to Fig. 2～Fig. 4, Fig. 8, Fig. 9)]

In each

combination

4 ₁, 4 ₂Cylinder head 23 ₁, 23 ₂On Aspirating valves 37 is being set ₁, 37 ₂With outlet valve 38 ₁, 38 ₂, make Aspirating valves 37 ₁, 37 ₂Near two

combinations

4 ₁, 4 ₂Between paddy portion 28.In addition, at each cylinder head 23 ₁, 23 ₂On, respectively via ball bearing 50,50 ' and bent axle 15 supporting camshaft 41 abreast ₁, 41 ₂Two ends,

camshaft

41 ₁, 41 ₂Via valve rocker 39 ₁, 39 ₂, 40 ₁, 40 ₂The suction of driven for opening and closing correspondence, outlet valve 37 ₁, 37 ₂, 38 ₁, 38 ₂And, at the driving timing sprocket 42 of the left end that is fixed in

bent axle

15 ₁, 42 ₂, and be fixed in and respectively make up 4 ₁, 4 ₂Camshaft 41 ₁, 41 ₂The driven timing sprocket 43 of left end ₁, 43 ₂On, around hanging timing chain 44 ₁, 44 ₂Above-mentioned two

drive timing sprocket

42 ₁, 42 ₂The shared axle sleeve 45 that has the outer end of the left side main journal 17 that is adjacent to bent axle 15 and be pressed into.

So, anterior combination 4 ₁ Driving timing sprocket 42 ₁, timing chain 44 ₁With driven timing sprocket 43 ₁Constitute the rotational delay to 2 of bent axle 15/1 is delivered to corresponding camshaft 41 ₁Anterior timing transmission device 46 ₁, they are configured in anterior combination 4 ₁, the anterior timing Transmission Room 47 that on the sidewall of generator 30 1 sides, forms ₁In.In addition, the rear portion combination 4 ₂ Driving timing sprocket 42 ₂, timing chain 44 ₂With driven timing sprocket 43 ₂Constitute the rotational delay to 2 of bent axle 15/1 is delivered to corresponding camshaft 41 ₂Rear portion timing transmission device 46 ₂, they also are to be configured in rear portion combination 4 ₂, the rear portion timing Transmission Room 47 that on the sidewall of generator 30 1 sides, forms ₂In.

At this moment, rear portion timing transmission device 46 ₂Be configured in anterior timing transmission device 46 ₁Axial more lateral, i.e. generator 30 1 sides.

Bent axle 15 is rotation in the counterclockwise direction shown in arrow R among Fig. 4, thereby, each timing chain 44 ₁, 44 ₂Rear side has become slack-side.Should give certain force of strain to these slack-side, at each timing chain 44 ₁, 44 ₂Slack-side, contacting sliding freely and swinging the earth's axis freely and be supported on arc chain tensioning device 48 on the crankcase 21 ₁, 48 ₂, with certain load these chain tensioning devices 48 ₁, 48 ₂The longitudinal direction central part to the timing chain 44 of correspondence ₁, 44 ₂The known stretcher tappet 49 of pushing ₁, 49 ₂, be installed on respectively in each combination 4 by

bolt

109 ₁, 4 ₂Cylinder block 22 ₁, 22 ₂On the attachment face that forms on the rear surface.

Crankcase 21 is divided into left half chests body 21a and right half chests body 21b at its right and left central part place, the outer ring of aforementioned ball bearing 19,20 is installed on these half chests bodies in advance by gently being pressed into, two

half chests body

21a, 21b in conjunction with the time, the left and right sides

main journal

17,18 of bent axle 15 gently is pressed into the inner ring of above-mentioned ball bearing 19,20 respectively, but this moment, drive timing sprocket 42 ₁, 42 ₂Outside diameter d ₁Be configured to be slightly smaller than the inner diameter d of the inner ring of above-mentioned ball bearing 19 ₂, shared axle sleeve 45 is pressed into the driving timing sprocket 42 of bent axle 15 so that be adjacent to the outside of left side

main journal

17 ₁, 42 ₂Can pass the inner ring of left side ball bearing 19.Thereby two drive timing sprocket 42 when bent axle 15 is monomer ₁, 42 ₂Being pressed into of axle sleeve 45 become possibility, can carry out it at an easy rate and be pressed into operation.In addition, by

half chests body

21a, 21b about ball bearing 19,20 gently is pressed into and about

main journal

17,18, can be in engine operation, suppress the vibration of ball bearing 19,20, realize reducing noise.[exhaust system (with reference to Fig. 2, Figure 10 and Figure 11)]

Anterior combination 4 ₁Relief opening 51 ₁Outlet, be opened on its cylinder head 23 ₁Front surface on, anterior outlet pipe 13 ₁Upstream extremity be connected in this opening.In addition, the rear portion combination 4 ₂Relief opening 51 ₂Outlet, be opened on its cylinder head 23 ₂The rear portion, with rear portion timing transmission device 46 ₂On the right flank of opposite side, rear part exhaust pipe 13 ₂Upstream extremity be connected in this opening.

Anterior outlet pipe 13 ₁With rear part exhaust pipe 13 ₂All be up and down abreast pipe arrangement in front and rear chain-driven

unit

46 ₁, 46 ₂The right side of the internal-combustion engine E of opposite side is converged the exhaust silencer 14 that is connected in the right side that is configured in trailing wheel 2 to downstream simultaneously.

So, because as mentioned above front and rear

timing transmission device

46 ₁, 46 ₂The concentrated area be configured in internal-combustion engine E, rear portion combination 4 ₂To front portion combination 4 ₁A side of the direction side that staggers, on the other hand front and rear outlet pipe 13 ₁, 13 ₂Concentrate the opposite side of pipe arrangement up and down abreast, so though avoided two timing transmission devices 46 at an easy rate at internal-combustion engine E ₁, 46 ₂With two outlet pipes 13 ₁, 13 ₂Interference, still, can be comprising two outlet pipes 13 ₁, 13 ₂Do one's utmost to do narrow at the overall width of interior internal-combustion engine E.

In addition, because the rear part exhaust pipe 13 of pipe arrangement on the right side of two-wheeled motor vehicle M ₂Be connected in and be opened on rear portion combination 4 ₂Cylinder head 23 ₂The rear portion right flank on relief opening 51 ₂So,, can reduce rear part exhaust pipe 13 ₂Curved part, reduce its pipe resistance, help the raising of output performance.[power train (with reference to Fig. 2, Fig. 3 and Fig. 9)]

On crankcase 21, integrally form to rear portion combination 4 ₂The outstanding gearbox portion 95 in bottom, in this gearbox portion 95, after being right after bent axle 15, accommodate the input shaft 96 and the output shaft 97 of variable-speed motor 8 before and after the ground in parallel side by side, their two ends are bearing on the left and right sides wall of gearbox portion 95 via a pair of ball bearing 98,98 ', 99,99 ' respectively.Right-hand member at its input shaft 96, spline is in conjunction with the inner member 101 of the clutch 100 that is covered by the right cap 34 of the right flank that is engaged in crankcase 21, on the inner of its external member 102, be installed with and be meshed with an aforementioned actuation gear 54a and constitute a driven gear 54b of a transmission device 54.In addition, 97 of input shaft 96 and output shafts, multistage (being 5 grades in the illustrated embodiment) change gear train G is being set selectively ₁～G ₅

Supporting the left side wall 95a (with reference to Fig. 9) of gearbox portion 95 of the left end of input shaft 96 and output shaft 97, from rear portion combination 4 ₂ Timing transmission device 46 ₂Stagger to the right and a bit form.Thereby, the rear portion is being made up 4 ₂ Timing transmission device 46 ₂In stretcher tappet 49 ₂Be installed in rear portion combination 4 ₂Cylinder block 22 ₂Occasion on the rear surface can be avoided the interference with gearbox portion 95.

Particularly, because rear portion combination 4 ₂ Timing transmission device 46 ₂Be configured in anterior combination 4 ₁ Timing transmission device 46 ₁The outside, promptly the left side, so gearbox portion 95 is suppressed to inferior limit with respect to crankcase 21 amount of staggering to the right, can realize the miniaturization of internal-combustion engine E.[vehicle speed sensor (with reference to Fig. 2, Fig. 9 and Figure 12)]

On the rear wall of gearbox portion 95, be provided with mounting hole 103, make detection unit 105a pass the vehicle speed sensor 105 that stretches in the gearbox portion 95 in this hole 103 and be fixed in the rear wall of gearbox portion 95 by means of bolt 110.This vehicle speed sensor 105 is configured to make its detection unit 105a facing to high-grade driven gear, promptly high-grade train of gearings G ₅The tooth top of driven gear 104.

High-grade driven gear 104 spline fitted are in output shaft 97, and double as is set up 2 grades of train of gearings G by being moved to the left ₂Change gear, even, can not make the periphery of this gear break away from the detection range of vehicle speed sensor 105 because it moves.Vehicle speed sensor 105 is to the output of unillustrated computer and near the corresponding signal of the number of teeth of the high-grade driven gear 104 that skims over the front of its detection unit, in this computer, come the computing speed of a motor vehicle according to input signal, be presented on the speed of a motor vehicle meter on the unillustrated instrument panel of two-wheeled motor vehicle M (not shown go out).

So, vehicle speed sensor 105 is because being installed on the rear wall of gearbox portion 95 as the vehicle speed sensor 105 that the speed of a motor vehicle detects with the rotating speed with the high-grade driven gear 104 of output shaft 97 rotations all the time, so it installs the rear portion combination 4 of much less inclining to gearbox portion 95 1 rear flank ₂, even the rear part exhaust pipe 13 that install at its rear portion ₂Also can not be subjected to anyly to carry out with bothering.

On the rear surface of gearbox portion 95, integrally form the fin 106 be trapped among below the vehicle speed sensor 05, have the through hole 107 that the lead-in wire 108 of vehicle speed sensor 105 passes in the central authorities of this fin.

In addition, as shown in Figure 2, respectively integrally the back of gearbox portion 95 outstanding be provided with pairing left and right, on next group earrings portion 112 ₁, 112 ₂, the outstanding pairing left and right earrings portion 112 that is provided with in the front of this external crankcase 21 ₃, when internal-combustion engine E is contained on the vehicle frame 1, these earrings portions 112 ₁, 112 ₂, 112 ₃Engage with vehicle frame 1.Utilize the two groups of earrings portions 112 in its rear portion ₁, 112 ₂The dead angle at gearbox portion 95 rears on every side is provided with aforementioned vehicle speed sensor 105, can improve space availability ratio.

So; above-mentioned fin 106 performance protection vehicle speed sensor 105 in the advancing of two-wheeled motor vehicle M exempts from from the function of the evil of the sudden gravel of bottom, and the through hole 107 that this outer fuse 108 passes is also as invading the rainwater in the fin 106, the exhaust port performance function of scouring water.[lubricated and cooling system (with reference to Fig. 2, Fig. 3, Fig. 5 and Fig. 6)]

As shown in Fig. 2, Fig. 3 and Fig. 5, be incorporated at key on the actuation gear 54a of right-hand member of bent axle 15, meshing pump driver gear 56 and a driven gear 54b at two of its circumferencial direction different positions.

Pump driver gear 56 closes with pump shaft 61 bonds that are bearing in the right cap 34 of the right side that is engaged in crankcase 21 via bearing 86.This pump shaft 61, it is parallel with bent axle 15, is configured in the front upper place of bent axle.

On the inner of this pump shaft 61, fixing lubricated internal rotor 58 with gerotor type oil pump 57, on the outer end, fixing the impeller 63 of cooling water pump 62 in addition.Pump case 60 screws of accommodating the external rotor 59 of oil pump 57 are fixed in next door 65 crankcase 21, fulcrum ball bearing 20.In addition, the pump case 64 of accommodating impeller 63 leans on bolt 87 to be fixed in the outer side surface of right cap.So, oil pump 57 and water pump 62 are configured in the front upper place of bent axle 15 coaxially, and oil pump 57 (looks that example is like that at grade in abutting connection with ground as shown) along radial direction and aforementioned overrunning clutch in abutting connection with ground and is located on the crankcase 21 in addition.

On the suction port of oil pump 57, manage 68 strainers 67 (with reference to Fig. 2) that are connected in the oil sump portion 66 that is located at crankcase 21 bottoms via sucting, delivery outlet is communicated to bent axle 15 and each combination 4 via fuel feeding road 69 in addition ₁, 4 ₂

Camshaft

41 ₁, 41 ₂And other lubricated portions.

On fuel feeding road 69 midway, clamping be positioned at bent axle 15 substantially directly over oil purifier 70.This oil purifier 70 is installed on right cap 34 in the formed filter chamber 71, and the lid 72 that seals the open ports of this chamber 71 is fixed in right cap 34.In filter chamber 71, oil purifier 70 outer Monday side upstream chamber 71a be communicated to the delivery outlet of oil pump 57 via the upstream portion 69a on formed fuel feeding road 69 in crankcase 21, in addition, oil purifier 70 interior Monday side the 71b of room of outlet be communicated to two oil circuit 69b of branch on formed fuel feeding road 69 in lid 72,69c, the oil circuit 69b of branch on one side is communicated to the lubricated portion 73 of bent axle 15 systems, the oil circuit 69c of branch of another side, locate further to be branched off into the oil circuit 69d of branch of front and back on the crankcase 21 and the mating face of right cap 34,69e is communicated to front and

rear combination

4 ₁, 4 ₂Comprise each

camshaft

41 ₁, 41 ₂Lubricated portion 74 in interior valve power train ₁, 74 ₂

Thereby, if along with the rotation of bent axle 15, oil pump 57 is driven via pump driver gear 56 and pump shaft 61, and then the fluid in the oil sump portion 66 is sucted and be pressed to filter chamber 71 from strainer 67, after oil purifier 70 filtrations, be fed into lubricated portion 73 and each combination 4 of bent axle 15 systems ₁, 4 ₂The lubricated portion 74 of valve power train ₁, 74 ₂, can lubricate them.And, by above-mentioned configuration, the formation on oil pump 57, filter chamber 71, oil purifier 70 and fuel feeding road 69, having done one's utmost to shorten the length on fuel feeding road 69, simultaneously, can constitute symmetrically substantially front and

rear combination

4 ₁, 4 ₂Lubricating system, lubricated equably two

combinations

4 ₁, 4 ₂Become possibility.

In oil purifier 70, be provided with the relief valve 70b that when its filter core stops up, makes short circuit between upstream chamber 71a and the 71b of room of outlet.

On the other hand, in water pump 62, as shown in Figure 6, its suction pipe 75 is via water pipe 77 ₁Be connected to the outlet of radiator 29 (being arranged on the front of internal-combustion engine E as shown in FIG.), output tube 76 is via water pipe 77 ₂Be connected to anterior combination 4 ₁Water jacket 24 ₁The bottom.

As previously mentioned, the front and

rear combination

4 ₁, 4 ₂In each cylinder block 22 ₁, 22 ₂With cylinder head 23 ₁, 23 ₂In have a series of water jackets 24 ₁, 24 ₂, in addition, in rear portion combination 4 ₂Cylinder head 23 ₂In, be formed on the chamber, interflow 80 of its open-front, water jacket 24 ₂Top be communicated in this one the interflow chamber 80.

Forwardly with

rear portion combination

4 ₁, 4 ₂Face-off face on, integrally outstanding the setting and corresponding water jacket 24 ₁, 24 ₂The bottom joint 78 that is connected of bottom ₁, 78 ₂, the bottom that is configured in paddy portion 28 is communicated with water pipe 77 ₃Two ends be connected in these

joints

78 ₁, 78 ₂

In addition, forwardly make up 4 ₁The rear surface on, integrally form and its water jacket 23 ₁The top sub 79 that is connected of top ₁, and then, in rear portion combination 4 ₂Cylinder head 23 ₂On the lower surface, screw is being fixed the top sub 79 that is connected with chamber 80, interflow ₂Flange, the rear portion that is configured in the paddy portion 28 is communicated with water pipe 77 ₄Two ends be connected in these top subs 79 ₁, 79 ₂

In chamber 80, interflow, thermostat 82 is being set, simultaneously, while the duct thermostat lid 81 that keeps this thermostat to seal the opened portion of chamber 80, interflow is engaged in cylinder head 23 ₂Front surface.

On duct thermostat lid 81, integrally form the outlet connection 83 of the outlet that is connected in thermostat 82, this outlet connection 83 is via water pipe 77 ₅Be connected to the import of radiator 29.

In addition, at top sub 79 ₂On, integrally forming the bypass outlet connection 84 that is communicated to chamber 80, interflow via access 84 ', this one side pass-out mouth joint 84 makes up 4 with the rear portion successively by means of Bypass hose 85 ₂Carburetor 12 ₂Hot room, anterior combination 4 ₁Carburetor 12 ₁Hot room and aforementioned suction pipe 75 be connected.Bypass outlet connection 84 is formed the diameter enough littler than the outlet connection 83 of duct thermostat lid 81.

When the water temperature of thermostat 82 in chamber 80, interflow is lower than set point of temperature 81 blocking-up are covered in chamber 80, interflow and duct thermostat, open the access 84 ' of 84 of chamber 80, interflow and bypass outlet connections simultaneously, in addition, its water temperature one becomes above set point of temperature, just chamber 80, interflow is communicated with 81 on duct thermostat lid, closes above-mentioned access 84 ' simultaneously.

Thereby, along with the rotation of bent axle 15, when water pump 62 is driven via pump driver gear 56 and pump shaft 61, if the water temperature of chamber 80, interflow is lower, then because thermostat 82 covers 81 blocking-up to chamber 80, interflow and duct thermostat, open access 84 ' simultaneously, so cooling water at first is sent to anterior combination 4 from output tube 76 by means of water pump 62 ₁Water jacket 24 ₁, then, the only about half of of this cooling water directly is communicated with water pipe 77 via the bottom ₃Flow to rear portion combination 4 ₂Water jacket 24 ₂Then, flow through anterior combination 4 ₁Water jacket 24 ₁Cooling water be communicated with water pipe 77 via top ₄Flow to rear portion combination 4 ₂Chamber, interflow 80, and flow through rear portion combination 4 ₂Water jacket 24 ₂Cooling water interflow, flow out bypass outlet connection 84 from chamber 80, interflow via access 84 ', successively via the Carburetor 12 at rear portion ₂Carburetor 12 with the front portion ₁Hot room, turn back to the suction pipe 75 of water pump 62, after, repeat same circulation.Can promote the warming-up of internal-combustion engine E by this of cooling water not via the circulation of radiator 29, give Carburetor 12 simultaneously ₁, 12 ₂Heat, can prevent freezing around the fuel nozzle of these Carburetors.

If the warming-up of internal-combustion engine E progress flows through two

combinations

4 ₁, 4 ₂Water jacket 24 ₁, 24 ₂And the water temperature of the cooling water at interflow surpasses specified value in chamber 80, interflow, then owing to thermostat 82 is communicated with chamber 80, interflow with 81 on duct thermostat lid, close access 84 ' simultaneously, so, above-mentioned cooling water flow turns back to the suction pipe 75 of water pump 62 to outlet connection 83 1 sides via radiator 29.After, owing to repeat same circulation,, can cool off two combinations 4 effectively with the cooling water that the thermolysis by radiator 29 is cooled ₁, 4 ₂

, because bottom and top are communicated with water pipe 77 ₃, 77 ₄Just passable with relatively short pipe arrangement, and they are configured in two paddy portions between combination, so be hidden in two

combinations

4 ₁, 4 ₂Between and unshowy, do not undermine the outward appearance of internal-combustion engine E.

In addition, because thermostat 82 is arranged on cooling front and

rear combination

4 ₁, 4 ₂The chamber, interflow 80 at cooling water interflow in, so thermostat 82 detects two combinations 4 really ₁, 4 ₂Average water temperature, can carry out two the

combination

4 ₁, 4 ₂The control of suitable water temperature.And need can not realize the simplification of pipe arrangement at the pipe arrangement of thermostat 82.

And then, because in rear portion combination 4 ₂Upper front surface on engaging the duct thermostat lid 81 that has forward outstanding outlet connection 83, so reduced the water pipe 77 that this outlet connection 83 is communicated to the import of radiator 29 ₅Bending, can suppress its flow resistance very for a short time, realize the improvement of outward appearance simultaneously.

In addition, because in rear portion combination 4 ₂Top sub 79 ₂On integrally form be communicated to than its little diameter the interflow chamber 80 bypass outlet connection 84, so can carry out top sub 79 at one stroke ₂With 84 pairs of rear portion combinations 4 of bypass outlet connection ₂Installation, can realize the simplification of pipe distribution operation.

In addition and since oil pump 57 and water pump 62 be configured in coaxial on, do by means of the shared pump shaft 61 that is driven by actuation gear 54a to drive them, so can realize the simplification that their driving is.

And along radial direction and overrunning clutch 53 adjacency configurations, whereby by the arranged coaxial of oil pump 57 and water pump 62, the horizontal width that can also suppress internal-combustion engine E increases oil pump 57.

In addition, because oil pump 57 and water pump 62 are configured in the front upper place of bent axle 15, so the gearbox portion 59 that can form the rear portion of crank pin 21 fully uninterruptedly and be attached thereto with above-mentioned oil pump 57 and water pump 62, can carry out at an easy rate internal-combustion engine E road clearance guarantee the reduction with the height of

vehicle seat

6a, 6b with the occupant.In this occasion, owing to pass through the above-mentioned configuration of oil pump 57 and water pump 62, even the front portion of crankcase 21 becomes the shape that how much bloats, its bellying also is absorbed into anterior combination 4 ₁In the following dead angle, so do not hinder the miniaturization of internal-combustion engine E.

And, avoided being immersed in the fluid of oil sump portion 66 because occupy the driving system of two

pumps

57,62 of the top position of bent axle 15, so it drives the stirring that system does not cause fluid, can help the minimizing of power loss.

And then, the input shaft 96 of variable-speed motor 8 and output shaft 97 and above-mentioned oil pump 57 and water pump 62 fully uninterruptedly horizontally after adjacent bent axle 15, realize the miniaturization of gearbox portion 95 on one side, being formed flatly its upper wall becomes possibility on one side, whereby, guarantee gearbox portion 95 and aforementioned rear part exhaust pipe 13 fully ₂Between distance, can avoid at an easy rate from rear part exhaust pipe 13 ₂The heat affecting of the variable-speed motor 8 that gearbox portion 95 and Qi Nei are accommodated.[starting system (with reference to Fig. 2 and Fig. 7)]

On the anterior bottom surface of crankcase 21, form and accommodate recess 88, disposing actuating motor 11 in it, its axis is paralleled with bent axle 15.The housing 89 of this starting motor 11, the 89a of the cylindrical support portion liquid of one end thickly is matched with formed through hole 90 on above-mentioned end wall of accommodating recess 88, simultaneously the support wrist 89b of its other end is fixed in crankcase 21 by bolt 111, is installed in whereby on the crankcase 21.The rotor shaft 91 of actuating motor 11 stretches in the crankcase 21 its front end, and formed small gear 92 can drive aforementioned starting gear 52 via reducing gear train 93 on its front end.So, starting gear 52, overrunning clutch 53 and reducing gear train 93, the starting transmission gear 94 that formation contact actuating motor 11 and bent axle are 15.

As mentioned above, owing to the front lower place that actuating motor 11 is configured in bent axle 15, so this starting motor 11 does not hinder the rear portion of crankcase 21 and the miniaturization of gearbox portion 95 yet, and, because be absorbed in the dead angle of front portion combination 41 bottoms, so do not hinder the miniaturization of internal-combustion engine E.In addition, though the above-mentioned configuration by actuating motor 11, reducing gear train 93 is immersed in the fluid in the oil sump portion 66 of crankcase 21 bottoms, but, because it is to move, do not stir fluid, so do not cause power loss in the engine operation action when engine start.

The present invention is not limited to the various embodiments described above, and all design alterations are possible in the scope that does not break away from its spirit.

As mentioned above according to the 1st feature of the present invention, owing to the output tube of water pump is communicated to the water jacket of the 1st combination, the water jacket bottom that in addition the water jacket bottom of the 1st combination is communicated with cross current to the 2 combinations via the bottom, and then the water jacket top of the 1st combination is communicated with cross current to the chamber, interflow that forms and be connected in the top of its water jacket in the 2nd combination via top, bottom and top are communicated with the paddy portion that water pipe is configured in two combinations, so by means of fairly simple pipe arrangement, cooling water becomes possibility, two combinations of cooling that can be good to the supply of the equalization of the water jacket of the 1st and the 2nd combination.And because to be communicated with water pipe just passable with relatively shorter thing bottom and top, and they are configured in two paddy portions between combination, and are unshowy so be hidden between two combinations, do not undermine the outward appearance of internal-combustion engine.

In addition according to the 2nd feature of the present invention, owing in the chamber, interflow at the cooling water interflow of having cooled off the 1st and the 2nd combination, be provided with thermostat, so thermostat detects the average water temperature of two combinations really, can carry out the suitable water temperature control of two combinations.And need can not realize the simplification of pipe arrangement at the pipe arrangement of thermostat.

And then according to the 3rd feature of the present invention, because when internal-combustion engine is contained on the two-wheeled motor vehicle, configuration before and after the 1st and the 2nd combination, the outlet connection of chamber, interflow is given prominence on the upper front surface that is arranged on the 2nd combination, this outlet connection via the import of cross current to the radiator in front that is arranged on internal-combustion engine, so can reduce the bending that connects the water pipe between chamber, interflow and radiator, can suppress its flow resistance very for a short time, realize the improvement of outward appearance simultaneously.

With good grounds again the 4th feature of the present invention, because the top sub that connects top connection water pipe is engaged in the 2nd combination, on this top sub, integrally form to be communicated to the bypass outlet connection of chamber, interflow than its little diameter, the Bypass hose of the suction pipe that is connected in water pump is connected to this pass-out mouth joint on one side, so integrated by the top sub that engaged and bypass outlet connection in the 2nd combination can be realized the simplification of pipe distribution operation.

With good grounds again the 5th feature of the present invention is because in the bypass water route, so the hot room of Carburetor that is clamping each combination, can prevent the freezing of Carburetor of two combinations by means of the cooling water that flows through the bypass water route.

Claims

1. the cooling unit of a V-type internal combustion engine makes up (4 at the 1st and the 2nd of V-type internal combustion engine (E) ₁, 4 ₂) the middle water jacket (24 that forms ₁, 24 ₂), it is characterized in that, the output tube of water pump (62) (76) is communicated to the 1st combination (4 ₁) water jacket (24 ₁), in addition, the 1st combination (4 ₁) water jacket (24 ₁) bottom is communicated with water pipe (77 via the bottom ₃) be communicated to the 2nd the combination (4 ₂) water jacket (24 ₂) bottom, and then, the 1st combination (4 ₁) water jacket (24 ₁) top is communicated with water pipe (77 via top ₄) be communicated in the 2nd combination (4 ₂) in form and be connected in its water jacket (24 ₂) the chamber, interflow (80) on top, bottom and top are communicated with water pipe (77 ₃, 77 ₄) be configured in two the combination (4 ₁, 4 ₂) paddy portion.

2. the cooling unit of the V-type internal combustion engine described in the claim 1 is characterized in that, in chamber, interflow (80), the thermostat (82) that opens and closes its outlet is set, and the outlet connection of this chamber (80) (83) is communicated to the import of radiator (29).

3. the cooling unit of the V-type internal combustion engine described in the claim 1 or 2 is characterized in that, when this internal-combustion engine (E) is contained on the two-wheeled motor vehicle (M), the 1st and the 2nd combination (4 ₁, 4 ₂) before and after configuration, being arranged on the 2nd and making up (4 the outlet connection (83) of chamber, interflow (80) is outstanding ₂) upper front surface on, this outlet connection (83) via water pipe (77 ₅) be communicated to the import of the radiator in front (29) that is arranged on internal-combustion engine (E).

4. the cooling unit of the V-type internal combustion engine described in any one in the claim 1～3 is characterized in that, is communicated with water pipe (77 connecting top ₄) top sub (79 ₂) be engaged in the 2nd the combination (4 ₂) on, at this top sub (79 ₂) on, integrally form to be communicated to the bypass outlet connection (84) of chamber, interflow (80) than its little diameter, the Bypass hose of the suction pipe that is connected in water pump (62) (75) (85) is connected to this pass-out mouth joint (84) on one side.

5. the cooling unit of the V-type internal combustion engine described in the claim 4 is characterized in that, in Bypass hose (85), is clamping each combination (4 ₁, 4 ₂) Carburetor (12 ₁, 12 ₂) hot room.