CN102192055B

CN102192055B - Intake system structure of power unit

Info

Publication number: CN102192055B
Application number: CN2011100600632A
Authority: CN
Inventors: 池田健一郎; 箕轮和也; 洼田俊行
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2010-03-16
Filing date: 2011-03-10
Publication date: 2013-05-22
Anticipated expiration: 2031-03-10
Also published as: ES2702399T3; CN102192055A; JP5513943B2; EP2366884A2; JP2011190760A; EP2366884B1; EP2366884A3

Abstract

This intake system structure of a power unit (5), which is mounted to a vehicle (1), and in which an internal combustion engine (2) and a power transmission 3 are integrated with each other, an air cleaner (50) is provided at a position away from a cylinder part (44) of the internal combustion engine (2), a throttle body (52) is disposed at a position close to the cylinder part, and the air cleaner and the throttle body are connected to each other by a connecting tube (51), wherein a regulating member (54) around the axis of an intake passage (52a) regulates the throttle body (52) in a position in the rotating direction around the axis with respect to the cylinder part, the throttle body is assembled to the cylinder part through an inlet manifold (53) and supported integrally, and in the throttle body, a connecting cylindrical part (60) to the connecting tube is provided with a positioning part (61) for positioning the connecting tube in the rotating direction.

Description

The suction system structure of power unit

Technical field

The suction system structure that the present invention relates to be equipped on vehicle, especially is equipped on the power unit that possesses internal-combustion engine of dilly.

Background technique

At present, in the suction system that is equipped on vehicle, the internal-combustion engine that especially is equipped on dilly and the integrated power unit that forms of power transmitting deice, as shown in following patent documentation 1, the closure district is arranged between internal-combustion engine and air-strainer, and the closure district is connected by connecting tube with air-strainer.And, the embedding in the end of downstream side of connecting tube have the closure district the upstream side entrance part around fastening by restraint zone, thereby with the end of downstream side fixed bearing of connecting tube.

Patent documentation 1: TOHKEMY 2006-291777 communique (Fig. 2, Fig. 3)

Yet, for example shown in above-mentioned patent documentation 1, with respect to the cylinder portion of internal-combustion engine from the position on configuration air-strainer and near the position of cylinder section in the power unit of configuration section stigmatal field, usually connecting tube is long member, easily produces deviation on the rotational position of tubular axis line in the engagement portion during installation.If in the situation that the contraposition of sense of rotation exists deviation to carry out is fastening, may produce shape distortion etc. because of its warping stress.

In addition, in order to carry out exactly such contraposition, need the connection operation of complicated structure, complexity.

Summary of the invention

The object of the invention is to solve the problems referred to above in the existing suction system that is equipped on the power unit in vehicle, a kind of suction system structure of power unit is provided, its function that can suppress the space and improve suction system with simple structure be connected workability.

to achieve these goals, a first aspect of the present invention provides a kind of suction system structure of power unit, in power unit, internal-combustion engine and power transmitting deice are integrated, and this power unit is equipped on vehicle, with respect to the cylinder portion of described internal-combustion engine from the position possess air-strainer, in the position configuration closure district near this cylinder section, described air-strainer is connected by connecting tube with described closure district, the suction system structure of described power unit is characterised in that, with respect to described cylinder section, described closure district by restriction around the limiting part restriction of the axis of its air suction way rotation position around the sense of rotation of this axis, and described closure district is arranged on described cylinder section via intake manifold and is supported integratedly by described cylinder section, and, described closure the district with connection cylindrical part that described connecting tube is connected on be provided with the positioning part of the location of the sense of rotation of carrying out this connecting tube.

A second aspect of the present invention is take the suction system structure of the described power unit of first aspect as the basis, it is characterized in that, described positioning part is provided in the position that engages with the engagement portion in described closure district, the pipe side that described engagement portion is arranged on described connecting tube connects on cylindrical part.

A third aspect of the present invention is characterized in that take the suction system structure of the described power unit of second aspect as the basis, and described positioning part is arranged on the boss part that the idling air screw in described closure district is used.

A fourth aspect of the present invention is characterized in that take the suction system structure of the described power unit of the third aspect as the basis, and the position amesiality with respect to the axis of described air suction way is arranged to be positioned in described positioning part when above-below direction is observed.

A fifth aspect of the present invention take the 3rd or the suction system structure of the described power unit of fourth aspect as the basis, it is characterized in that, the connection cylindrical part that is connected with described connecting tube in described closure district is eccentric and form to a side with respect to the axis of described air suction way, and the described pipe side of described connecting tube connects cylindrical part and forms to side's bias equally with respect to the axis of the pipe side draught gas path in this connecting tube and described closure district side.

A sixth aspect of the present invention is characterized in that take the suction system structure of the 5th described power unit in aspect as the basis, and described connecting tube possesses from described pipe side and connects the upstream line part of side mark set a distance of cylindrical part.

A seventh aspect of the present invention is take the suction system structure of the 6th described power unit in aspect as the basis, it is characterized in that, connect cylindrical part in described pipe side and protrude with respect to the outer surface of the described line part of a side of the eccentric axis of described pipe side draught gas path and be provided with the cable guide portion, this cable guide portion possesses the recess of engaging cable.

A eighth aspect of the present invention is take the suction system structure of the 7th described power unit in aspect as the basis, it is characterized in that, described cable is the closure cable, it turns back into U word shape and sets towards the place ahead of vehicle at connecting tube from the closure drum, wherein, described closure drum is arranged on and the perforation that be configured in throttle plate pin in described closure district directed along the overall width direction arbitrary axle head in left and right to this closure district.

A ninth aspect of the present invention take the 3rd to the eight aspect the suction system structure of the described power unit of either side as the basis, it is characterized in that, dispose the containing box of described vehicle above described closure district and described connecting tube, be provided with the insepction window of described idling air screw in the bottom of this containing box.

The invention effect

The suction system structure of power unit according to a first aspect of the invention, be provided with the positioning part of the sense of rotation of connecting tube due to the connection cylindrical part in the closure district of the location of having carried out sense of rotation in the cylinder section with respect to internal-combustion engine, therefore can easily and exactly connect, can reduce the deviation of contraposition of the sense of rotation of connecting tube, and the shape distortion of the connecting tube that is accompanied of minimizing and deviation.

Consequently, acquisition can suppress the space of the suction system of power unit, and improves the function of suction system and the suction system structure of the power unit that is connected workability with simple structure.

According to a second aspect of the invention, except the effect of a first aspect of the present invention, owing to can carrying out at connecting tube the location of the sense of rotation of connecting tube in the connection operation of closure, therefore improved workability.

According to a third aspect of the invention we, except the effect of a second aspect of the present invention, because the boss part that idling air screw is used is also used as the positioning part, therefore can prevent the maximization in closure district.

According to a forth aspect of the invention, except the effect of a third aspect of the present invention, can reduce the stretching out of short transverse of positioning part, prevent the maximization in closure district.

According to a fifth aspect of the invention, except the of the present invention the 3rd or the effect of fourth aspect, even the connection cylindrical part in closure district is eccentric and form with respect to air suction way, the pipe side of connecting tube connects cylinder and forms with respect to pipe side draught gas path bias, as long as carry out the location of the sense of rotation of connecting tube, just can eliminate the skew of the axis of two air suction ways, can successfully carry out being connected of closure district and connecting tube, the performance of internal-combustion engine also is able to stabilization.

According to a sixth aspect of the invention, except the effect of a fifth aspect of the present invention, the retentivity when improving the connection operation by line part, thus improve workability and prevent that the position of sense of rotation is offset.

According to a seventh aspect of the invention, except the effect of a sixth aspect of the present invention, be provided with the cable guide portion at the line part of connecting tube, therefore easily guarantee to guide the space of cable, the cable that improves in vehicle is arranged property.

According to an eighth aspect of the invention, except the effect of a seventh aspect of the present invention, due to the closure cable is kept by the cable guide portion on connecting tube, therefore can configure the closure cable lower, can reduce the height of seat.

According to a ninth aspect of the invention, except the of the present invention the 3rd to eight aspect the effect of either side, even covered the top of closure district and connecting tube by large-scale containing box, also can not take off containing box and carry out the inspection of idling air screw, so workability is improved.

Description of drawings

Fig. 1 is the two-wheeled common explanatory drawing that is equipped with the related power unit of one embodiment of the present invention.

Fig. 2 is take present embodiment related power unit and the major component left side view of suction system on every side as leading thereof.

Fig. 3 is take present embodiment related power unit and the major component plan view of suction system on every side as leading thereof.

A part that Fig. 4 (a) has been having cut away of the air filter housing of present embodiment and connecting tube and the plan view that illustrates (b) are air filter housing and the cutting away a part of connecting tube and the left side view that illustrate of IVb under look in this figure (a).

Fig. 5 (a) be in Fig. 4 (a) Va to the front-end face figure that looks lower connecting tube, the sectional view of the connecting tube that is (b) the middle Vb of Fig. 4 (a) under look.

Fig. 6 (a) is the left side view in the closure district of present embodiment, is (b) rear view in the closure district of VIb under look in this figure (a).Need to prove, (a) with (b) in VIa suitable to view, (a) in VIc section be the part section of VIc under look in (b).

Fig. 7 (a) is the right side view in the closure district of present embodiment, is (b) plan view in the closure district of VIIb under look in this figure (a).Need to prove, (a) with (b) in VIIa suitable to view, (b) in VIIc section be the part section of VIIc under look in (a).

Fig. 8 (a) is the facade view in the closure district of VIIIa under look in Fig. 6, is (b) facade view in the closure district of VIIIb under look in Fig. 6.

Near when Fig. 9 is the starting in the closure district of IX under look in Fig. 6 bypass valve vertical view cutaway drawing.

Figure 10 is take a variation of present embodiment related power unit and the major component left side view of suction system on every side as leading thereof.

Figure 11 is take a variation of present embodiment related power unit and the major component plan view of suction system on every side as leading thereof.

Symbol description:

1 ... two-wheeled (vehicle)

2 ... internal-combustion engine

3 ... power transmitting deice

4 ... vehicle frame

5 ... power unit

6 ... seat

7 ... the power unit housing

15 ... main frame

17 ... transverse frame

18 ... suspension link

19 ... pivot plate

20L ... left back framework

20R ... right back framework

21 ... crossbeam

24 ... containing box

25 ... fuel tank

34 ... trailing wheel

40 ... hook section

42 ... cylinder head

44 ... cylinder section

50 ... air-strainer

50a ... air filter housing

50b ... the air-strainer unit

50d ... the cleaning side room

51 ... connecting tube

51a ... pipe side draught gas path

51d ... line part

52 ... the closure district

53 ... intake manifold

54 ... bolt (limiting part)

55 ... bolt

56 ... the pipe side connects cylindrical part

57 ... the cable guide portion

57a ... recess

58 ... the engagement portion

60 ... connect cylindrical part

61 ... positioning part (boss part)

62 ... idling air screw

63 ... closure

64 ... throttle plate pin

65 ... the closure drum

66 ... the closure cable

68 ... engine load sensor

69 ... the installation of sensors bolt

70 ... starting air pilot valve

71 ... the valve construction bolt

86 ... insepction window

87 ... lid

A～e ... wiring

A '～c ' ... wiring

Embodiment

Below, referring to figs. 1 through Fig. 9, the suction system structure of the related power unit of one embodiment of the present invention is described.

Need to prove, the inferior direction that all around goes up in the explanation of this specification and claims is the direction of the vehicle under the state that is equipped on vehicle, the particularly dilly such as two-wheeled according to the power unit that present embodiment is related.In figure, arrow F represents vehicle front, and L represents the vehicle left, and R represents that vehicle is right-hand, and U represents above vehicle.

In addition, in figure, hollow arrow schematically shows air-breathing the flowing to internal-combustion engine, and small arrow m schematically shows flowing of idling air, and when small arrow n schematically shows starting, bypath air flows.

Fig. 1 represents two-wheeled 1 left surface as the related vehicle of present embodiment.In two-wheeled 1, internal-combustion engine 2 and integrated to the power transmitting deice 3 of trailing wheel transferring power, and possess below seat 6 with respect to vehicle frame 4 and be mounted to swing power unit 5 freely, internal-combustion engine 2 is the Otto (cycle) engine of single cylinder.The mode of power unit 5 overall width direction orientation along two-wheeled 1 with the bent axle 8 of power unit housing 7 is equipped on two-wheeled 1.

As Fig. 1～shown in Figure 3, present embodiment two-wheeled 1 in, the pairing left and right front fork 12 of axle supporting front-wheel 11 can turn to the ground pivot suspension on the head tube 10 of the front end that is positioned at vehicle frame 4 via deflecting bar 13.In addition, the handlebar 14 that turns to use is installed on the top of deflecting bar 13.

Vehicle frame 4 is camber beam (under bone) type as described below,, extends a main frame 15 from head tube 10 to oblique lower rear that is, forms lower curtate between the seat 6 that main frame 15 and passenger are used and improves and straddle easness.Be equipped with at this lower curtate the end pedal 16 that the driver who supplies to sit on seat 6 is put pin.

The rearward end of main frame 15 engages with the left and right intermediate portion of extended transverse frame 17 to the left and right at the front and back of body bottom section intermediate portion.Left and right end portions joint at transverse frame 17 has pairing left and right pivot plate 19, and this pairing left and right pivot plate 19 supports the front portion of power unit 5 for swinging up and down via suspension link 18.

In addition, engage respectively the left back framework 20L of pairing left and right, the front end of right back framework 20R in the left and right end portions of transverse frame 17.

After left and

right afterframe

20L, 20R extend from transverse frame 17 to tiltedly upper rear, so that the mode that tilts mild is crooked.In addition, left and

right afterframe

20L, 20R extend obliquely upward midway by engaging mutually to link towards the outstanding crooked crossbeam that forms 21 of mode in vehicle front upper place, and mutually link joint in the rear end by the linking member 22 along overall width direction horizontal orientation.

Left back framework 20L and right back framework 20R are in the position that links with crossbeam 21, left back framework 20L is formed on different positions on the lower with respect to right back framework 20R, and left back framework 20L and left linking department 23L crossbeam 21 are positioned at than right back framework 20R and right linking department 23R crossbeam 21 position on the lower.

Be equipped with above left and

right afterframe

20L, 20R have along front and back the driver with and the seat 6 of the seat surface used of co-rider.

Be provided with containing box 24 between left and

right afterframe

20L, 20R and in the lower front of seat 6, be provided with fuel tank 25 in the lower rear of seat 6.

Need to prove the symbol 26 expression front mudguards in Fig. 1,27 expression rear mudguards, 28 expression taillights, the 29 main jiffy stands of expression, 30 expression side jiffy stands.

Vehicle frame 4 covers by the body cover 31 that mainly is made of synthetic resin, is equipped with Headlamps 32 on the body cover 31 of body forward structure.

In power unit 5, its anterior internal-combustion engine 2 is integrated with the power transmitting deice 3 in left side, rear portion, possesses hook section 40 in the forward lower part of power unit housing 7.

In hook section 40, power unit 5 is supported as swinging up and down by pivot plate 19 via suspension link 18, and left side, the rear portion of power unit 5 is to approach or to separate with left and

right afterframe

20L, 20R via rear shock absorber 33 by left and

right afterframe

20L, 20R supporting.

The rearward end axle supporting wheels 34 of the power transmitting deice 3 that arranges in the rear portion side of power unit housing 7 in addition.

As shown in Figure 2 and Figure 3, at the front side of power unit housing 7, near level and lean forward cylinder block 41, cylinder head 42, valve mechanism cover 43 is fastening in the mode that stacks gradually, thereby consist of the cylinder section 44 of internal-combustion engine 2.

Need to prove, from cylinder head 42, outlet pipe 45 is installed downwards and slightly forward, outlet pipe 45 rearward and the right side walk around the below of crankcase and be connected (with reference to Fig. 1) with the silencing apparatus 46 that is provided in the vehicle body right side

In the left side of trailing wheel 34 and on the top of power transmitting deice 3, be supported with air-strainer 50 in the position of separating with the cylinder section 44 of internal-combustion engine 2, in the position configuration near cylinder section 44, closure district 52 is arranged.Air-strainer 50 is connected by connecting tube 51 with closure district 52.

Closure district 52 be positioned at the bottom that is arranged on power unit 5 for power unit 5 is remained in vehicle frame 4 hook section 40 directly over, and be positioned at the top of power unit 5.

The downstream side in closure district 52 is anchored on the upstream side of intake manifold 53 by bolt 54, the downstream of intake manifold 53 is to be fixed on cylinder head 42 by bolt 55 with the mode that is communicated with at the not shown intakeport that arranges on cylinder head 42.

Therefore, intake manifold 53 is installed on cylinder section 44 by bolt 55 restriction around the axis rotation of air suction way, closure district 52 is fastened on intake manifold 53 around the axis Y of air suction way 52a (Fig. 6,7 references) rotation by bolt 54 restrictions, therefore closure district 52 limits around the position of the sense of rotation of this axis Y by the bolt 55 that conduct limit the limiting member that rotates around the axis Y of its air suction way 52a, and is arranged in cylinder section 44 and is supported integratedly by cylinder section 44 via intake manifold 53.

Air after being purified by air-strainer 50 is via the interior conveying of cylinder head 42 to internal-combustion engine 2 of the air suction way separately of connecting tube 51, closure district 52, intake manifold 53.

In addition, the chimeric bottom that has towards the fuel injection system 35 of not shown intakeport burner oil on the top of intake manifold 53, the other end of the fuel distribution tube 37 that one end is connected with the petrolift 36 of fuel tank 25 is connected with fuel injection system 35, and fuel is by fuel injection system 35 42 interior supplies from fuel tank 25 to cylinder head.

As shown in Figure 4, air-strainer 50 consists of by filter cleaner unit 50b is set in air filter housing 50a.Air filter housing 50a separates inside by be configured to flat filter cleaner unit 50b facing to left and right directions, is provided with the suction port 50c of extraneous gas in the left side side of filter cleaner unit 50b, is provided with cleaning side room 50d in right side side.Side room 50d is connected with connecting tube 51 in cleaning, and the entrance part 51b of its pipe side draught gas path 51a inserts this cleaning side room 50d.

Connecting tube 51 is to be formed with the rubber of strengthening rib 51c or resinous cross section for circular cylinder at outer surface, can tackle vibration, displacement and heat between connection device.

With respect to the entrance part 51b of upstream extremity that is inserted into cleaning side room 50d, be provided with the pipe side connection cylindrical part 56 that is connected for the closure district 52 in downstream side in the downstream of connecting tube 51.

In addition, connecting tube 51 has from managing the upstream line part 51d of side mark set a distance of side connection cylindrical part 56.

As shown in Fig. 5 (a), the axis S of the pipe side draught gas path 51a that the axis T of pipe side connection cylindrical part 56 is interior with respect to connecting tube 51 is to a side (top, diagram U side) bias.

The side with respect to the axis S bias of pipe side draught gas path 51a in the pipe side connects cylindrical part 56, be provided with by on axis S, T direction to engagement portion 58 (also with reference to Fig. 4) that closure district 52 side-prominent two projections consist of.

In addition, as shown in Fig. 5 (b), connect cylindrical part 56 in described pipe side and protrude with respect to the outer surface of the line part 51d of a side of the axis S bias of pipe side draught gas path 51a and be provided with cable guide portion (Japanese: ケ one Block Le ガイ De section) 57, cable guide portion 57 possesses the recess 57a (also with reference to Fig. 4) of engaging cable.Cable as engaging, effective especially during the such closure cable 66 of engaging aftermentioned, but the various cables that the power, electricity, the fluid that namely are used in other are used (comprising pipe) also can be configured in space on connecting tube 51 than the lowland with cable, easily guarantee to guide the space of cable.

As shown in Figure 6,52 are provided with the connection cylindrical part 60 that is connected with connecting tube 51 in the closure district, connect Z-shaped axis Y-direction one side (top, the diagram U side) bias that becomes with respect to the air suction way 52a in closure district 52 of the axis of cylindrical part 60.

Be provided with in connection cylindrical part 60 and carry out connecting tube 51 around the positioning part 61 of the location of the sense of rotation of the axis T of pipe side connection cylindrical part 56.

Positioning part 61 is provided in the connection cylindrical part 60 in closure district 52 on the position of engagement portion 58 engagings that are connected with the pipe side that is arranged on connecting tube 51 on cylindrical part 56, in the present embodiment, the positioning part is the boss part 61 in idling air screw 62 use of closure district's 52 settings.

As shown in Fig. 6 (b), when observing from above-below direction, the position with respect to the axis Y amesiality (left side, diagram L side) of the air suction way 52a in closure district 52 is arranged to be positioned in positioning part 61.

When connecting tube 51 as described above was attached to closure district 52, the front end Inserting Tube side of the connection cylindrical part 60 in closure district 52 connected in cylindrical part 56, and it is consistent with the axis Z of connection cylindrical part 60 that the pipe side connects the axis T of cylindrical part 56.

In addition, two projections of the engagement portion 58 of pipe side connection cylindrical part 56 engage with it in the mode of the positioning part 61 of the cylindrical part 60 that is clamped and connected, and carry out the location around the sense of rotation of the axis T that manages side connection cylindrical part 56.

Consequently, carried out the location of the sense of rotation of connecting tube 51, the axis Y of the air suction way 52a that the axis S that makes pipe side draught gas path 51a and closure district 52 are interior is consistent and carry out the connection of the regulation of two

air suction way

51a, 52a.

Under the coupled condition of regulation as described above, it is fastening by fixing belt 59 (with reference to Fig. 4) that the pipe side of front end that will insert in the inboard connection cylindrical part 60 in closure district 52 connects the periphery of cylindrical part 56.

Need to prove, as mentioned above, closure district 52 is by limiting the position around the sense of rotation of this axis Y as the bolt 54 that limits the limiting member that rotates around the axis Y of its air suction way 52a, and be installed on cylinder section 44 and by 44 supportings integratedly of cylinder section via intake manifold 53, so connecting tube 51 also is restricted with respect to power unit 5 around the rotational position of its axis S.

As Fig. 6, shown in Figure 7,52 air suction way 52a is equipped with the closure 63 of the butterfly type that opens and closes this air suction way 52a in the closure district, the axis V of throttle plate pin 64 that supports this closure 63 is directed along the overall width direction, thereby flatly across air suction way 52a, and by the left and right sides wall supporting in closure district 52 for rotating.

Right-hand (diagram R direction) outstanding axle head of 52 to the closure district at throttle plate pin 64 is connected with closure drum 65, be connected with closure cable 66 and to the Returnning spring 67 of closure 63 to the direction application of force of closing on this closure drum 65, utilize not shown throttle operation member traction valve cable 66, come opening throttle 63.

As shown in Figure 2 and Figure 3, closure cable 66 is rearward drawn from closure drum 65, engages with the recess 57a of cable guide portion 57 on connecting tube 51 and turns back and form U word shape, thereby being provided in the place ahead of two-wheeled 1.

Need to prove, closure cable 66 is inserted wildcard and is located in closure cable pipe.

Outer side wall in the other end of throttle plate pin 64 (left end, diagram L direction end) outstanding closure district 52 is equipped with the engine load sensor 68 that forms respectively with closure district 52.

The engine load sensor 68 that detects throttle opening is with the chimeric closure district 52 that is arranged on of its detection unit 68a mode consistent with the axis V of throttle plate pin 64, and the installation of sensors bolt 69 of the axis V direction by throttle plate pin 64 is installed to closure district 52 from left side side.

And the starting air pilot valve 70 as actuator that carries out the control in closure district 52 is arranged on closure district 52, and this air shut-off valve 70 is arranged in the top of engine load sensor 68, and forms respectively with closure district 52.

Starting air pilot valve 70 is near engine load sensor 68 and be arranged on closure district 52 from same direction by two valve construction bolts 71 along vehicle fore-and-aft direction alignment arrangements.

Starting air pilot valve 70 is made of solenoid valve, when internal-combustion engine 2 starting, makes closure 63 bypass and controls the above combustion air (bypath air during starting) of aperture that is supplied to closure 63.

As Fig. 6 (b), shown in Figure 8, during starting, bypath air is as shown in small arrow n, from the closure district upstream side of 52 closure 63, namely bloat bypath air groove 72 from formation to the air suction way 52a that connects cylindrical part 60 by bypath air inlet hole 73, and enter starting air pilot valve 70.

As shown in Figure 9, during the starting controlled by starting air pilot valve 70 bypath air as shown in small arrow n by bypath air supply hole 74, and as Fig. 7 (b) as shown in by to the air suction way 52a supply than closure 63 downstreams (intake manifold 53 sides).

Need to prove, the positioning part 61 that engages with the engagement portion 58 of connecting tube 51 sides is to screw togather the boss part 61 that idling air screw 62 is installed.

When the idling air adjustment valve 75 that is made of idling air screw 62 is used for being set in internal-combustion engine 2 idle running, even the delivery volume of the combustion air of necessity that close the throttle 63 is still supplied with (idling air).

As shown in Fig. 6, Fig. 8 (b), the idling air is as shown in small arrow m, the upstream side of 52 closure 63, idling air groove 76 from formation to the air suction way 52a that connects cylindrical part 60 that namely bloat enter idling air adjustment valve 75 from the closure district, according to the valve opening of being set by the amount of being screwed into of idling air screw 62 by idling air adjustment valve 75.Idling air after being adjusted by idling air adjustment valve 75 as shown in small arrow m by idling air supply hole 77, and as Fig. 7 (b) as shown in by the air suction way 52a supply to the downstream side (intake manifold 53 sides) of closure 63.

The supply of idling air presets according to characteristic and the service condition of each body, but can adjust by idling air screw 62 again.

Need to prove, as shown in Figure 2, dispose containing box 24 above closure district 52 and connecting tube 51, be provided with the insepction window 86 that checks idling air screw 62 for convenient in the bottom of containing box 24.Common lid 87 obturations by rubber system or resin etc. of insepction window 86.

As shown in Fig. 6 (a), engine load sensor 68 and starting air pilot valve 70 are arranged above and below and configure and be arranged on closure district 52, the valve construction bolt 71 of starting air pilot valve 70 has two along vehicle fore-and-aft direction alignment arrangements, and the installation of sensors bolt 69 of engine load sensor 68 disposes one on the above-below direction line P between two valve construction bolts 71.

Therefore, prevent the interference that installation of sensors bolt 69 and valve construction bolt 71 are mutual.

Engine load sensor 68 is distinguished equally towards the place ahead with outside the second wired coupling device 81 that is connected with outside the first wired coupling device 80 that is connected with starting air pilot valve 70, and on respect to the direction of the axis V intersection of throttle plate pin 64 alignment arrangements.

The first wired coupling device 80 is arranged on the engine load sensor 68 that is arranged on throttle plate pin 64, therefore roughly the same with the upper-lower position of the axis Y of air suction way 52a, and towards same direction, 52 air suction way 52a separates and configures but the second wired coupling device 81 of starting air pilot valve 70 is from the closure district.

Therefore, the axis W of the second wired coupling device 81 is configured to be inclined to acute angle theta with respect to the axis Y of air suction way 52a in the mode near air suction way 52a, the wiring b that draws from the second wired coupling device 81 towards roughly the same direction and near each other, therefore is easy to be wound around above-mentioned wiring a, b (with reference to Fig. 2,3) with the wiring a that draws from the first wired coupling device 80.

As shown in Figure 2 and Figure 3, the crossbeam 21 that two-wheeled 1 vehicle frame 4 has pairing left and

right afterframe

20L, 20R, installs between pairing left and

right afterframe

20L, 20R, crossbeam 21 is configured in first, second wired coupling device 80, the place ahead of 81, thus the wiring a that will draw from first, second

wired coupling device

80,81, the regional guidance that wiring b surrounds to the upper surface by crossbeam 21, left and

right afterframe

20L, 20R and power unit 5.

Wiring a, wiring b go back to rear view of vehicle at above-mentioned zone to left, form a wiring c of combination in the mode of boundling or formation single line bundle.

Need to prove, the illustrated situation of Fig. 2, Fig. 3 is directly rearward turned back in above-mentioned zone for wiring a, the b that draws from first, second

wired coupling device

80,81, but also can significantly unroll in above-mentioned zone and after the temporary transient supporting of crossbeam 21, rearward turn back.

In this case, because crossbeam 21 forms agley in the mode outstanding towards the vehicle front upper place, therefore can keep the bending of the wiring a, the b that draw from first, second

wired coupling device

80,81 larger, can increase the oscillating quantity of internal-combustion engine 2.

Wiring c in the place ahead of trailing wheel 34 across right-hand to the overall width direction and again turn back into forward U word shape, form a wiring e of combination with the wiring d of the starting motor 82 of the upper surface that is configured in power unit 5 with boundling or the mode that forms the single line bundle, and set towards the place ahead on power unit 5 right sides.

Near wiring e (the C section in Fig. 3) the right linking department 23R of crossbeam 21 and right back framework 20R rearward turns back, suitably lock by wire clamp 85 along right back framework 20R, extend the control gear (program fuel injection control unit) 83 that is set in the installation of the rear portion of right back framework 20R always, be connected with control gear 83.

Zone before and after near the reflex part C of wiring e right linking department 23R is adapted to the U font significantly, therefore has sufficient deflection between power unit 5 sides that swing and vehicle frame 4 sides.

In addition, crossbeam 21 is to form agley towards the outstanding mode in vehicle front upper place, and left back framework 20L is formed on different positions on the lower with respect to right back framework 20R, so that crossbeam 21 is near first, second

wired coupling device

80,81, thereby easily process wiring a, the wiring b that draws from first, second

wired coupling device

80,81.

In addition, intake manifold 53 is with respect to independent setting of cylinder head 42 of internal-combustion engine 2, be arranged on cylinder head 42 by bolt 55 is fastening, but be used for intake manifold 53 is overlapped (with reference to Fig. 2) with first, second

wired coupling device

80,81 when the regional A of the insertion of the setting tool of cylinder head 42 installations is configured to observe from the overall width direction, lean on vehicle body central side (with reference to Fig. 3) than first, second

wired coupling device

80,81 when observing from above-below direction, thereby easily carry out the fastening installation of intake manifold.

And, closure district 52 is arranged on intake manifold 53 by bolt 54 is fastening, but the joining portion of closure district 52 and first, second

wired coupling device

80,81 wiring a, b separately all is positioned at involutory surface B than intake manifold 53 and closure district 52 (Fig. 2,3 with reference to) by the position of intake manifold 53 sides, thereby can make closure 63 near the firing chamber of internal-combustion engine 2.

In above such present embodiment, play the effect as following.

Namely, be provided with the positioning part 61 of the sense of rotation of connecting tube 51 due to the connection cylindrical part 60 in the closure district 52 of the location of having carried out sense of rotation in the cylinder section 44 with respect to internal-combustion engine 2, therefore can reduce the deviation of contraposition of the sense of rotation of connecting tube 51, and the shape of the connecting tube that is accompanied of minimizing and deviation is out of shape.

Positioning part 61 is 52 positions that are provided in engagement portion 58 engagings that are connected with the pipe side that is arranged on connecting tube 51 on cylindrical part 56 in the closure district, therefore can carry out the location of the sense of rotation of connecting tube 51 at connecting tube 51 in the connection operation of closure 52, so improve workability.

Positioning part 61 is also used as positioning part 61 for being arranged on the boss part of idling air screw 62 use in closure district 52 with boss part, therefore can prevent the maximization in closure district 52.

Therefore in addition, the position amesiality with respect to the axis Y of air suction way 52a is arranged to be positioned in positioning part 61 when above-below direction is observed, and can reduce the stretching out of short transverse of positioning part 61, thereby can prevent the maximization in closure district 52.

the connection cylindrical part 60 that is connected with connecting tube 51 in closure district 52 is eccentric and form with respect to axis Y-direction one side of air suction way 52a, the pipe side of connecting tube 51 connects cylindrical part 56 and forms to side's bias equally with closure district 52 sides with respect to the axis S of the pipe side draught gas path 51a in connecting tube 51, therefore even the connection cylindrical part 60 in closure district 52 is eccentric and form with respect to air suction way 52a, the pipe side of connecting tube 51 connects cylinder 56 and forms with respect to pipe side draught gas path 51a bias, as long as carry out the location of the sense of rotation of connecting tube 51, just can eliminate two air suction way 52a, the axis Y of 51a, the skew of S, successfully carry out being connected of closure district 52 and connecting tube 51, the performance of internal-combustion engine 2 also is able to stabilization.

Connecting tube 51 possesses from managing the upstream line part 51d of side mark set a distance of side connection cylindrical part 56, the retentivity during therefore by line part 51d raising connection operation, thus improve workability and prevent that the position of sense of rotation is offset.

Connecting cylindrical part 56 in the pipe side protrudes with respect to the outer surface of the line part 51d of a side of the axis S bias of pipe side draught gas path 51a and is provided with cable guide portion 57, cable guide portion 57 possesses the recess 57a of engaging cable, therefore easily guarantee to guide the space of cable, improve the cable layout property in two-wheeled 1.

In addition, cable is closure cable 66, turn back into U word shape and set towards two-wheeled 2 the place aheads at connecting tube 51 from closure drum 65, therefore can configure closure cable 66 lower, can reduce the height of seat 6, wherein above-mentioned closure drum 65 is arranged on along the overall width direction directed and be configured in the right axle head to closure district 52 of connecting of throttle plate pin 64 in closure district 52.

Dispose two-wheeled 1 containing box 24 above closure district 52 and connecting tube 51, be provided with the insepction window 86 of idling air screw 62 in the bottom of containing box 24, even therefore covered the top of closure district 52 and connecting tube 51 by large-scale containing box 24, also can not take off containing box 24 and carry out the inspection of idling air screw 62, so workability is improved.

in addition, internal-combustion engine 2 with integrated to the power transmitting deice 3 of trailing wheel 34 transferring power and will be mounted to respect to vehicle frame 4 swing power unit 5 freely be configured in seat 6 below two-wheeled 1 in, the closure district 52 of the gettering quantity of controlling combustion engine 2 is arranged between power unit 5 and seat 6, the engine load sensor 68 that detects throttle opening is arranged on along the overall width direction directed and be configured in the axle head of the throttle plate pin 64 in closure district 52, and carry out closure district 52 control as the starting air pilot valve 70 of actuator near engine load sensor 68 and be installed to closure district 52 from same direction, the the second wired coupling device 81 that is connected with the outside with engine load sensor 68 and outside the first wired coupling device 80 that is connected with starting air pilot valve 70 is the same direction towards front and back respectively, and alignment arrangements on the direction of intersecting with respect to throttle plate pin 64, so a plurality of sensors independent of each other, starting air pilot valve 70 as actuator, engine load sensor 68 with respect to the installation in closure district 52 towards same direction, therefore the processability in closure district 52 is improved.

In addition, because first, second

wired coupling device

80,81 of configuration on the direction of intersecting with respect to throttle plate pin 64 connects up, therefore can prevent stretching out to throttle plate pin 64 directions, and make first, second

wired coupling device

80,81 direction towards front and back same direction, therefore can improve processing, winding, the connection workability of wiring a, wiring b.

Engine load sensor 68 and starting air pilot valve 70 are arranged above and below and are configured in

closure district

52,52 air suction way 52a separates and the second wired coupling device 81 of the starting air pilot valve 70 of configuration is configured to be inclined to acute angle theta with respect to air suction way 52a in the mode near air suction way 52a from the closure district, therefore the wiring a that draws from the first wired coupling device 80 and approaching from the wiring b that the second wired coupling device 81 is drawn, thereby easily be wound around above-mentioned wiring a, b, can reduce the processing space of wiring a, b.

in two-wheeled 1, dispose in the bottom of power unit 5 power unit 5 is remained on hook section 40 on vehicle frame 4, closure district 52 be positioned at hook section 40 directly over and be positioned at the top of power unit 5, therefore from first, the second wired coupling device 80, the 81 wiring portion a that draw, b be configured to the swing of two-wheeled 1 the power unit 5 together that travels under, they swing to two-wheeled 1 fore-and-aft direction, thereby can suppress to the swing of overall width direction and above-below direction, the miniaturization of realization wire structures of 52 to the closure district, easily eliminate two-wheeled 1 body width and seat 6 system limit highly.

Two-wheeled 1 vehicle frame 4 possesses left and

right afterframe

20L, 20R, is arranged on the crossbeam 21 between left and

right afterframe

20L, 20R; crossbeam 21 is configured in first, second wired coupling device 80, the place ahead of 81; to be directed to from wiring a, the b that first, second

wired coupling device

80,81 is drawn the zone that the upper surface by crossbeam 21, left and

right afterframe

20L, 20R and power unit 5 surrounds, therefore connect up a, b are increased by the space of crossbeam 21 protections and wiring operation.

A, b are after turning back to two-wheeled 1 rear in described zone in wiring, as the wiring c of combination in the place ahead of trailing wheel 34 along the overall width direction across and again turn back into forward U word shape, be combined with the wiring d of the starting motor 82 of the upper surface that is configured in power unit 5, therefore can more effectively carry out the wiring operation around internal-combustion engine 2.

Crossbeam 21 is to form agley towards the outstanding mode in two-wheeled 1 vehicle front upper place, therefore can keep the bending of the wiring a, the b that draw from first, second

wired coupling device

80,81 larger, oscillating quantity that can increasing combustion engine 2, thus two-wheeled 1 riding comfort improved.

A side in left and

right afterframe

20L, 20R forms the upper-lower position difference with respect to the opposing party, so that crossbeam 21 is near first, second

wired coupling device

80,81, therefore can guarantee and improve the wiring a that draws from first, second

wired coupling device

80,81, the treatability of b.

in the present embodiment, the installation component of the starting air pilot valve 70 of the side in engine load sensor 68 and starting air pilot valve 70 is that valve construction bolt 71 is arranged and disposes two along two-wheeled 1 front and back, the installation component of the opposing party's engine load sensor 68 is that installation of sensors bolt 69 is configured on above-below direction line P between valve construction bolt 71, therefore can prevent the interference that engine load sensor 68 is mutual with the installation component of starting air pilot valve 70, make engine load sensor 68 and starting air pilot valve 70 more approaching, thereby can realize the miniaturization of closure district 52 and its wire structures.

closure district 52 remains on respect on the independent intake manifold 53 that arranges of the cylinder head 42 of internal-combustion engine 2, when the insertion zone A that is used for setting tool that intake manifold 53 is installed to cylinder head 42 is configured to observe from the overall width direction and first, the second

wired coupling device

80, 81 overlap, and when observing from above-below direction than first, the second

wired coupling device

80, 81 by the vehicle body central side, therefore can envoy stigmatal field 52 and cylinder head 42 approach and realize miniaturization, easily carry out simultaneously the not fastening installation of the intake manifold 53 of consubstantiality, thereby can make intake manifold 53 as the good cylinder head 42 of productivity of consubstantiality not.

The joining portion with first, second

wired coupling device

80,81 wiring a, b in closure district 52 all is positioned at the position by intake manifold 53 sides with respect to the involutory surface B of closure district 52 and intake manifold 53, therefore envoy's stigmatal field 52 further miniaturizations, can make closure 63 near the firing chamber of internal-combustion engine, thereby can improve the responsiveness of internal-combustion engine 2, realize that the miniaturization of internal-combustion engine and performance improve.

Above, one embodiment of the present invention is illustrated, but certainly can makes local form different in the scope of purport of the present invention.

For example, referring to Figure 10, Figure 11, the different variation of configuration of the wiring of drawing from first, second

wired coupling device

80,81 is illustrated simply.

Need to prove, identical with above-mentioned mode of execution except the configuration difference that makes wiring in this variation, in Figure 10, Figure 11, same section mark same-sign is omitted record, only different items are described.

As Figure 10, shown in Figure 11, the wiring a ' that draws from first, second

wired coupling device

80,81, wiring b ' are by the regional guidance that surrounds to the upper surface by the crossbeam 21 that configures on the front than first, second

wired coupling device

80,81, left and

right afterframe

20L, 20R and power unit 5, and (the D section in Fig. 3) is temporarily to the left back U word shape that turns back near crossbeam 21, and along crossbeam 21 supportings, form a wiring c ' of combination in the mode of boundling or formation single line bundle.

Crossbeam 21 is to form agley towards the outstanding mode in vehicle front upper place, and left back framework 20L is formed on different positions on the lower with respect to right back framework 20R, so that crossbeam 21 is near first, second

wired coupling device

80,81, therefore in the situation that this variation, especially easily carry out the wiring a ' that draws from first, second

wired coupling device

80,81, the processing of wiring b '.

Except in the wiring of D section with more than needed and obtain deflection, crossbeam 21 is also to form agley towards the outstanding mode in vehicle front upper place, the bending that therefore wiring a ', the b ' that draws from first, second

wired coupling device

80,81 can be reached the wiring c ' of combination keeps greatlyr, can increase the oscillating quantity of internal-combustion engine 2.

Wiring c ' is suitably locked by wire clamp 85 along right back framework 20R near the right linking department 23R of crossbeam 21 and right back framework 20R afterwards, extend the control gear (program fuel injection control unit) 83 that is set in the installation of the rear portion of right back framework 20R always, and be connected with control gear 83.

Therefore, in this variation, remain on crossbeam 21 by will connect up a ', b ', c ', can limit the hunting range of wiring, reduce wiring space.

Need to prove, in above-mentioned mode of execution and variation thereof, as vehicle, especially dilly, illustration two-wheeled 1, but so long as used the vehicle in same power unit 5 and closure district 52 etc. to get final product, the present invention also goes for the vehicle of other forms, for example the dolly of three-wheel, four-wheel.

In addition, the present invention is not limited to form, the orientation of the power unit 5 shown in above-mentioned mode of execution and variation thereof, the present invention relates to the connection of " closure district ", " connecting tube " etc. etc., for possessing " the suction system structure of power unit " of the structure that technological scheme puts down in writing, comprise various forms in the scope of purport of the present invention.

Claims

1. the suction system structure of a power unit, in power unit (5), internal-combustion engine (2) is integrated with power transmitting deice (3), and this power unit (5) is equipped on vehicle (1), the position of separating in the cylinder section (44) with respect to described internal-combustion engine (2) possesses air-strainer (50), in the position configuration closure district (52) near this cylinder section (44), described air-strainer (50) is connected by connecting tube (51) with described closure district (52), the suction system structure of described power unit is characterised in that

With respect to described cylinder section (44), described closure district (52) limits it around the position of the sense of rotation of this axis by limiting this closure district (52) around the limiting part (54) of the axis rotation of its air suction way (52a), and described closure district (52) is arranged on described cylinder section (44) via intake manifold (53) and is supported integratedly by described cylinder section (44), and

be provided with the positioning part (61) of the location of the sense of rotation of carrying out this connecting tube (51) on described closure district (52) and connection cylindrical part (60) that described connecting tube (51) is connected, be provided with for the pipe side that is connected with described closure district (52) in described connecting tube (51) downstream and connect cylindrical part (56), connect in this pipe side and be provided with the engagement portion (58) that is consisted of by two projections side-prominent to described closure district (52) on cylindrical part (56), the described positioning part of clamping, engagement portion (58) (61) that is consisted of by two described projections and engaging with it, thereby position on the sense of rotation of the axis that connects cylindrical part (56) around described pipe side.

2. the suction system structure of power unit according to claim 1, is characterized in that,

Described positioning part (61) is provided in the position that engages with engagement portion (58) in described closure district (52), the pipe side that described engagement portion (58) are arranged on described connecting tube (51) connects on cylindrical part (56).

3. the suction system structure of power unit according to claim 2, is characterized in that,

Described positioning part (61) is arranged on the boss part (61) of idling air screw (62) use in described closure district (52).

4. the suction system structure of power unit according to claim 3, is characterized in that,

The amesiality position of axis with respect to described air suction way (52a) is arranged to be positioned in described positioning part (61) when above-below direction is observed.

5. the suction system structure of according to claim 3 or 4 described power units, is characterized in that,

The connection cylindrical part (60) that is connected with described connecting tube (51) in described closure district (52) forms to side's bias with respect to the axis of described air suction way (52a),

The axis that the described pipe side of described connecting tube (51) connects cylindrical part (56) the pipe side draught gas path (51a) interior with respect to this connecting tube (51) is to forming with respect to the identical direction bias of a side of the eccentric axis of described air suction way (52a) with the described connection cylindrical part (60) in described closure district (52).

6. the suction system structure of power unit according to claim 5, is characterized in that,

Described connecting tube (51) possesses from described pipe side and connects the upstream line part of side mark set a distance (51d) of cylindrical part (56).

7. the suction system structure of power unit according to claim 6, is characterized in that,

Connect cylindrical part (56) in described pipe side and protrude with respect to the outer surface of the described line part (51d) of a side of the eccentric axis of described pipe side draught gas path (51a) and be provided with cable guide portion (57), this cable guide portion (57) possesses the recess (57a) of engaging cable.

8. the suction system structure of power unit according to claim 7, is characterized in that,

Described cable is closure cable (66), it turns back into U word shape and sets towards the place ahead of vehicle (1) at connecting tube (51) from closure drum (65), wherein, described closure drum (65) is arranged on the left and right arbitrary axle head of perforation to this closure district (52) that is configured in the throttle plate pin (64) in described closure district (52) along overall width direction orientation.

9. the suction system structure of power unit according to claim 3, is characterized in that,

In described closure district (52) and the top of described connecting tube (51) dispose the containing box (24) of described vehicle (1), be provided with the insepction window (86) of described idling air screw (62) in the bottom of this containing box (24).