CN104343495B - Ventilating structure of internal combustion engine - Google Patents

Abstract

The present invention provides a ventilating structure of an internal combustion engine. With the supply of the clutch shaft inserted through the insertion hole as a vent channel, The ventilating structure can reduce costs and prevent the entire internal combustion engine is increased. The ventilating structure includes: the clutch shaft (39) inserted through the insertion hole (60b), the inserting hole (60b) from the central portion (P) along the radial direction toward the peripheral edge portion (Q) in the clutch cover (7) covers the outer side wall (7v) perforations made on the structure of the internal combustion engine in the ventilation in the vicinity of the insertion hole (60b) of the central portion (P) formed to form the side opening inlet (60a) to the transmission chamber vent (2M); and from the peripheral edge portion (Q) of the insertion hole (60b), to cover an outer peripheral wall (7s) and crankcase (2) is perforated, to form the upper rear space (2) within the crankcase formed the breather chamber (61) of the vent passage (60c, 60d).

Description

The ventilation device of internal combustion engine

Technical field

The present invention relates to the ventilation device that the blow-by gas in internal combustion engine are processed.

Background technology

In the past, proposed there is such ventilation device：Blow-by gas in crankcase are involved in because integrally revolving with bent axle The rotation in the outer rotor portion of the AC electromotors for turning and in the rotary current that produces, separate oil by means of centrifugal force, using formation Breather chamber will be imported in the venting channels of crankcase cover in the blow-by gas of central remaining (for example, referring to patent documentation 1).

Patent documentation 1：Japanese Unexamined Patent Publication 9-53436 publication

In the ventilation device disclosed in patent documentation 1, the AC electromotors arranged in the end of bent axle from outer side covers Crankcase cover (ACG covers) is big by the perisporium of opposed with AC electromotors vertically side wall and the exterior circumferential for covering AC electromotors Cause is configured to bowl-shape, on the wall of side, from the part opposed with the end of bent axle along being formed radially venting channels.

In the case where being important to form the special venting channels of blow-by gas process on the side wall of crankcase cover, due to The clutch release shaft of the action for being externally controlled clutch to be also installed on the clutch cap as crankcase cover, therefore, If venting channels and clutch release shaft are located on a crankcase cover, structure becomes complicated and does not allow easy processing.

Therefore, be formed as making venting channels be arranged at ACG cover sides and make clutch release shaft as patent documentation 1 When staying in structure as clutch cap side, it is necessary to which machine-shaping respectively goes out the crankcase cover of both sides to be configured, and can cause Cost is raised, and causes internal combustion engine integrally to increase.

The content of the invention

The present invention be in view of such problem points and complete, its object is to provide a kind of ventilation device of internal combustion engine, Wherein, by the way that venting channels will be used as through patchhole through insertion for clutch release shaft, reduces cost and can prevent Internal combustion engine integrally increases.

In order to reach above-mentioned purpose, the invention described in technical scheme 1 is a kind of ventilation device of internal combustion engine, in crankcase 2 In, e axle supporting has bent axle 10, and is accommodated with variator M, and the breather chamber 61 that blow-by gas are carried out with gas-liquid separation is formed at institute The upper back space in crankcase 2 is stated, at the end that the side to the crankcase 2 of the main shaft 12 of the variator M is prominent Portion, is provided with speed change clutch 30, and the speed change clutch 30 arranged in the side of the crankcase 2 is covered by clutch cap 7 Lid, the clutch cap 7 be generally formed into by cover lateral wall 7v and cover periphery wall 7s it is bowl-shape, on the outside of the cover of the clutch cap 7 On wall 7v, running through towards peripheral part Q along radiation direction from the axially opposed central part P with the main shaft 12 has through slotting Enter hole 60b, make the Detaching and Lapping of the speed change clutch 30 clutch release shaft 39 be inserted it is described through patchhole 60b In, the ventilation device of the internal combustion engine is characterised by, in the vicinity through the central part P of patchhole 60b, shape Into the ventilation introducing port 60a of oriented variator room 2M side openings, from the peripheral part Q through patchhole 60b to institute State cover periphery wall 7s and the crankcase 2 enters eleven punch 11, form venting channels 60c, the 60d connected with the breather chamber 61.

Invention described in technical scheme 2 is characterised by, in the ventilation device of the internal combustion engine described in technical scheme 1, institute State through the peripheral part Q of patchhole 60b be in along the end on observation of the bent axle 10 when with the weight of the breather chamber 61 The position of conjunction.

Invention described in technical scheme 3 is characterised by, in the logical of the internal combustion engine described in technical scheme 1 or technical scheme 2 In depressed structure, described venting channels 60c, 60d are vertical in the peripheral part Q through patchhole 60b with described.

Invention described in technical scheme 4 is characterised by, described in any one in technical scheme 1 to technical scheme 3 Internal combustion engine ventilation device in, the ventilation introducing port 60a through patchhole 60b is formed as and the speed change clutch The side of device 30 is opposed.

Invention described in technical scheme 5 is characterised by, described in any one in technical scheme 1 to technical scheme 4 Internal combustion engine ventilation device in, it is described through patchhole 60b from the central part P along oblique upper towards the peripheral part Q and formed.

The ventilation device of the internal combustion engine according to technical scheme 1, in the clutch for making the Detaching and Lapping of speed change clutch 30 Device separates axle 39 through vicinity through the patchhole central part P that 60b's and main shaft 12 is axially opposed of insertion, formation The ventilation introducing port 60a of oriented variator room 2M side openings, from the peripheral part Q through patchhole 60b to perisporium and crankcase 2 Enter eleven punch 11, form venting channels 60c, the 60d connected with the breather chamber 61 in the upper back space in crankcase 2, therefore, When being involved in blow-by gas in the rotary current produced because of the rotation of speed change clutch 30 and separate oil using centrifugal force, The blow-by gas remained near central part are imported from ventilation introducing port 60a runs through patchhole 60b, and from becoming venting channels Breather chamber 61 is imported into through venting channels 60c, 60d of connection through patchhole 60b, in breather chamber 61 gas-liquid is further carried out Separate.

Ventilation introducing port 60a eliminates oil and to remain in central part attached near the central part of speed change clutch 30 Near blow-by gas are imported into ventilation introducing port 60a, therefore, following situations will not occur：Oil immersion in blow-by gas Ventilation introducing port 60a and block ventilation introducing port 60a.

Using the clutch release shaft 39 formed on the cover lateral wall 7v of clutch cap 7 through patchhole 60b as logical Gas passage is utilized, it is therefore not necessary to particularly form venting channels, can reduces cost, and, it is to avoid because in clutch cap 7 Cover lateral wall 7v newly forms venting channels and the expansion vertically of caused clutch cap 7, is prevented from internal combustion engine and integrally becomes big.

The ventilation device of the internal combustion engine according to technical scheme 2, the peripheral part Q through patchhole 60b is in edge The position Chong Die with breather chamber 61 during the end on observation of bent axle 10, therefore, from the peripheral part Q through patchhole 60b to ventilation Room 61 point-blank forms vertically venting channels 60c, 60d, can shorten venting channels 60c, 60d, and is easily ventilated Passage 60c, 60d's processes through setting.

The ventilation device of the internal combustion engine according to technical scheme 3, venting channels 60c, 60d with exist through patchhole 60b Peripheral part Q is vertical, therefore, easily carry out together with venting channels 60c, 60d through patchhole 60b through setting processing.

The ventilation device of the internal combustion engine according to technical scheme 4, the ventilation introducing port 60a through patchhole 60b is formed It is opposed with the side of speed change clutch 30, therefore, oil mostly disperses to speed change clutch because of the rotation of speed change clutch 30 The peripheral of device 30, the hardly side from speed change clutch 30 disperse to side, and oil is from the side with speed change clutch 30 Opposed ventilation introducing port 60a immersions are relatively low through the probability of patchhole 60b.

The ventilation device of the internal combustion engine according to technical scheme 5, it is described through patchhole 60b from the central part P Formed towards the peripheral part Q along oblique upper, therefore, in breather chamber 61 by gas-liquid separation after oil can by ventilation Passage 60c, 60d, flow down in through patchhole 60b and are expelled in the 2M of variator room from ventilation introducing port 60a.

Description of the drawings

Fig. 1 is the two-wheeled overall side view that an embodiment of the invention is related to.

Fig. 2 is the right side view of internal combustion engine.

Fig. 3 is the rearview of internal combustion engine.

Fig. 4 is the sectional view of the IV-IV lines in Fig. 2.

Fig. 5 is the sectional view of the V-V lines in Fig. 2.

Fig. 6 is the internal view of right crankcase cover.

Fig. 7 is the right side view of the internal combustion engine that right crankcase is observed from outside.

Fig. 8 is the left side view of the internal combustion engine that right crankcase is observed from inner side.

Fig. 9 is the right side view of the internal combustion engine that left crankcase is observed from inner side.

Label declaration

1：Internal combustion engine；2：Crankcase；2L：Left crankcase；2R：Right crankcase；2C：Crank chamber；2M：Variator room；3：Gas Cylinder body；4：Cylinder head；5：Valve mechanism cover；6：Left crankcase cover；7：Right crankcase cover (clutch cap)；7a：Cylindrical portion；7b：It is interior Side bearing boss portion；7c：Outboard bearing boss portion；7d：Barrel；7e：Spaced walls；7f：Cylindrical wall；7s：Cover periphery wall；7v：Cover Lateral wall；7g：Mating surface；8：Clutch chamber；10：Bent axle；12：Main shaft；13：Jackshaft；15：Balance shaft；16：Output chain gear； 23：Main drive gear；24：Active and passive gear；29：AC electromotors；30：Speed change clutch；31：Outer clutch race；32：Clutch Device inside race；35：Pressing plate；36：Clutch spring；37：Trip(ping) lever；39：Clutch cam axle (clutch release shaft)；40：From Clutch actuating strut；41：Clutch cable；60a：Ventilation introducing port；60b：Through patchhole；60c、60d：Venting channels；61：It is logical Air chamber；62：Ventilation delivery line.

Specific embodiment

Hereinafter, an embodiment of the invention is illustrated based on Fig. 1 to Fig. 9.

Fig. 1 is the overall side view of the saddle riding type two-wheeled 90 for being equipped with internal combustion engine of the present embodiment 1.

In the present embodiment, using the state of the direction of advance towards two-wheeled 90 as benchmark come left before and after determining It is right.

For this two-wheeled 90 vehicle frame 92, left and right main car frame 92b, 92b in a pair from turn to standpipe 92a to Rear extends backward lower section bending and forms drastically rake 92ba, 92ba, and its underpart is flexed up to forwards lower end in く words Portion.

In addition, side-looking observe when, under pair of right and left vehicle frame 92c, 92c from turn to standpipe 92a with inclined wide-angle direction Lower section and extend substantially in parallel with the drastically rake 92ba of main car frame 92b.

Seat rail 92d, 92d rearward extend from the top of drastically rake 92ba, 92ba of main car frame 92b, 92b, By the central part of the seat rail 92d, 92d and backstay 92e that drastically bottom of rake 92ba, 92ba links together, 92e carries seat rail 92d, 92d.

More than in such vehicle frame 92, front fork 93 is pivotally supported in steering standpipe 92a, front-wheel 94 by e axle supporting in The lower end of front fork 93, steering handle 100 is arranged at the upper end of the pivot of front fork 93, and front end is by e axle supporting on pivot plate 92f Back vent 95 rearward extend, the pivot plate 92f is located at the bottom of main car frame 92b, 92b, and trailing wheel 96 is by e axle supporting in back vent 95 rear end, rear shock absorber 97 is installed between the central part of back vent 95 and backstay 92e, 92e.

Fuel tank 98 is provided with main car frame 92b, 92b restocking, seat 99 is supported by seat rail 92d, 92d and is arranged on combustion The rear of hopper 98.

The internal combustion engine 1 being equipped on vehicle frame 92 is the stroke IC engine of single cylinder 4 of SOHC (Single Over Head Camshaft) type, and it is with such as Lower posture is by suspension：Make bent axle 20 relative to car body towards width of the carbody direction, and cylinder is somewhat leaned forward and is erected.

Front shroud 101 is covered with the top of lower vehicle frame 92c, 92c of vehicle frame 92 from the left and right sides, and side cover 102 is covered with internal combustion The left and right sides between machine 1 and seat 99, back cover 103 is covered with the latter half of seat rail 92d, 92d.

Front mudguard 104 is covered with the top of front-wheel 94, and rear mudguard 105 is covered with the top of trailing wheel 96.

Fig. 2 is the right side view of internal combustion engine 1, and Fig. 3 is the rearview of internal combustion engine 1, and Fig. 4 is cuing open for the IV-IV lines in Fig. 2 View, Fig. 5 is the sectional view of the V-V lines in Fig. 2.

With reference to Fig. 2, by towards the e axle supporting of bent axle 10 of left and right directions into the crankcase 2 that can be rotated freely it is oblique on Side, cylinder block 3 and cylinder head 4 are overlapped successively and are fastened as a whole, and are covered with valve mechanism cover 5 in cylinder head 4, cylinder block 3, Cylinder head 4, valve mechanism cover 5 are provided projectingly with leaning forward from crankcase 2 slightly towards front.

With reference to Fig. 4, in the cylinder block 3 projected obliquely upward from crankcase 2, in the way of it can slide piston is embedded with 18, crank-pin 10p connection of the piston 18 between connecting rod 19 and crank arm 10w, 10w for being erected at bent axle 10, corresponding to work Fill in 18 action and drive bent axle 10 to rotate.

In the bottom of cylinder head 4 and piston 18 top, formed combuster 20.

The valve actuating gear (not shown) for driving inlet and exhaust valve is arranged at cylinder head 4, and the inlet and exhaust valve is opened and closed the burning The opening of the porting of room 20.

As shown in figure 1, the air inlet pipe 71 rearward stretched out from cylinder head 4 connects via throttle body 72 with air filter 73 Knot.

The exhaustor 75 stretched out forwards from cylinder head 4 bends downwards, then rearward bends, along crankcase 2 Lower surface links near rear and right side with the acoustic filter 76 on the right side for being configured in trailing wheel 96.

With reference to Fig. 3 and Fig. 4, crankcase 2 is configured to be divided into left and right two halves, left crankcase 2L and right crankcase 2R it Between be formed with space in crankcase.

In crankcase space be between left and right vertical bearing wall 2Lv, 2Rv opposite one another by crankcase periphery wall 2Ls, The space that 2Rs is surrounded and formed, to constituting crank chambers 2C received of crank arm 10w of the counterweight of bent axle 10 and to often nibbling The variator room 2M that box-like gear-shift mechanism M is received is configured in front and back each other and is connected and constitute a space.

Left crankcase cover 6 and right crankcase cover 7 cover the left and right more lateral of left crankcase 2L and right crankcase 2R, and AC sends out Motor 29 is incorporated in the Dynamo Room 9 in left crankcase cover 6, speed change clutch 30 be incorporated in right crankcase cover 7 from Clutch room 8.

Clutch chamber 8 is connected with variator room 2M.

The lateral part root of the crank arm 10w of bent axle 10 via metal bearing 11,11 by e axle supporting in left crankcase 2L and Left and right opposite one another vertical bearing wall 2Lv, 2Rv of right crankcase 2R.

AC electromotors 29 are arranged at the left side projected to the left than the metal bearing 11 on the left of this of bent axle 10, and the AC sends out Motor 29 is covered by left crankcase cover 6.

With reference to Fig. 4, the main shaft 12 and jackshaft 13 of normally meshed gear variator M is via bearing 12b, 12b, 13b, 13b By e axle supporting between the left and right sidewall that the rear of vertical to the left and right bearing wall 2Lv, 2Rv of left and right crankcase 2L, 2R extends, quilt Drive gear set 12g for being supported on main shaft 12 and driven gear group 13g for being supported in jackshaft 13 make respectively corresponding gear Always intermesh and be accommodated in variator room 2M.

Projecting on the right side in clutch chamber 8 through right vertical bearing wall 2Rv to the right in main shaft 12, is arranged There is the speed change clutch 30 as many plate friction clutches.

On the left part that the running through left vertical bearing wall 2Lv to the left of jackshaft 13 projects to outside, it is embedded with defeated Go out sprocket wheel 16.

Rear wheel drive chain 17 is wound with output chain gear 16.

Main shaft 12 is parallel relative to bent axle 10 with jackshaft 13, and with reference to Fig. 8, main shaft 12 is located at the top of retreading of bent axle 10, Jackshaft 13 is located at the more rear of main shaft 12 and the somewhat position of obliquely downward, and jackshaft 13 is located at the position than bent axle 10 slightly by top Put.

Also, balance shaft 15 is arranged at parallel to each other the front of bent axle 10.

With reference to Fig. 4, balancer driven gear 21, cam chain drive sprocket 22, main drive gear 23 are with bent axle 10 integrally Ground rotation mode be entrenched in successively from left to right bent axle 10 by e axle supporting in right vertical bearing wall 2Rv metal bearing 11 simultaneously To the right on prominent right side.

Balancer driven gear 21 engages to enter action edge transmission, the balance driven gear with balance driven gear (not shown) It is flush-mounted in the balance shaft 15 in the front of bent axle 10.

For the valve actuating gear for being transferred to be arranged on the top of cylinder head 4 by power, in cam chain drive sprocket Cam chain 22c is wound with 22.

Main drive gear 23 engages to enter action edge transmission with active and passive gear 24, and the active and passive gear 24 is supported in and sets The outer clutch race 31 (with reference to Fig. 4) of the speed change clutch 30 on the right side of the main shaft 12.

With reference to Fig. 4 and Fig. 5, as many plate friction clutches speed change clutch 30 outer clutch race 31 by bottom 31b and cylindrical portion 31c are formed as having round-ended cylinder body, are rotatably embedded in through the central circular hole for being arranged on bottom 31b The cylinder base portion of active and passive gear 24, and be supported to be rotated freely centered on main shaft 12, also, the Jing of outer clutch race 31 Circumferentially linked with active and passive gear 24 by shock-absorbing spring 25.

The inner clutch race 32 arranged in the inner side of cylindrical portion 31c of outer clutch race 31 is embedded in main shaft by spline 12, and integratedly rotate with main shaft 12.

Inner clutch race 32 has the compression zone 32b and and cylindrical portion of the bottom 31b in the face of outer clutch race 31 Cylindrical portion 31c of 31c opposed concentric cylindrical portion 32c, multiple frictional disks 33 and clutch disk 34 in outer clutch race 31 Inner side by alternately be fitted together to be inserted in the annulus in the outside of cylindrical portion 32c of inner clutch race 32.

Frictional disk 33 slides axially and is embedded in cylindrical portion 31c of outer clutch race 31 freely, and with clutch outside Seat ring 31 integratedly rotates.

In addition, sliding axially the clutch that be embedded in freely with the clutch disk 34 of the alternately chimeric insertion of frictional disk 33 Cylindrical portion 32c of inside race 32, and integratedly rotate with inner clutch race 32.

Pressing plate 35 is rotatably supported on the shaft on the flange part 37f of trip(ping) lever 37 via bearing 38, the quilt of trip(ping) lever 37 Sliding freely be fitted together to and be inserted in the hollow bulb formed on main shaft 12, pressing plate 35 by means of clutch spring 36 elastic force from outer Side presses outermost frictional disk 33, and inserts to alternately chimeric between the compression zone 32b of inner clutch race 32 Frictional disk 33 and clutch disk 34 are extruded in the way of clamping from both sides, and speed change clutch 30 is due to frictional disk 33 and clutch disk Friction between 34 and become fastening state.

Trip(ping) lever 37 stretches out to the right than flange part 37f, and tapered portion 37a formed in its terminal part is inserted in right bent axle The inside of prominent cylindrical portion 7a for being formed on the inner surface of case cover 7.

It is vertical with trip(ping) lever 37 and rotate freely ground axle suspension in the suitable with clutch release shaft of right crankcase cover 7 The cam 39a of the inner end of clutch cam axle 39 is sticked in tapered portion 37a of the terminal part of the trip(ping) lever 37.

Clutch cam axle 39 makes outer end be projected into the outside of right crankcase cover 7, vertical with clutch cam axle 39 The base end part of clutch operating bar 40 is fitted the outer end for being installed on clutch cam axle 39 (with reference to Fig. 5).

The end of clutch cable 41 is combined together with the terminal part of the swing of the clutch operating bar 40.

Cover periphery wall 7s of the clutch cable 41 from the terminal part of clutch operating bar 40 along right crankcase cover 7 is upward Extend, and be supported in the engaging portion of the protrusion of locking support 42 and stretch out forwards, the locking support 42 is installed in right song The rear top of the ring-type frame wall 2Rss of axle box 2R.

Therefore, when clutch cable 41 is pulled due to the operation of driver, clutch operating bar 40 swings and makes Clutch cam axle 39 is rotated, and the cam 39a of clutch cam axle 39 makes trip(ping) lever 37 mobile to axially right side, pressing plate 35 with from Closing bar 37 overcomes together the elastic force of clutch spring 36 mobile to axially right side, and thus, frictional disk 33 and clutch disk 34 are pressed Pressure is released from, and gap is formed therebetween, and speed change clutch 30 becomes disengaged position.

Also, with reference to Fig. 1 of the right side view as car body, from the right cover 102 of the central part of side covering body From the position of the upper limb of the valve mechanism cover 5 along internal combustion engine 1 of front side, backward obliquely downward extends lower lip 102e, and along bent axle The back curve of case 2, the main body almost all of internal combustion engine 1 for making the oblique front lower place of right cover 102 is exposed, but, from crankcase 2 Clutch operating bar 40 that rear portion is provided projectingly and the clutch cable 41 that extends upward from clutch operating bar 40 are in the right side The inner side (lower lip 102e with reference to shown in the double dot dash line of Fig. 2) of lower lip 102e of side cover 102, the quilt of clutch operating bar 40 Right cover 102 is protected.

With reference to Fig. 5 and Fig. 8, constituting in the underlying space of main shaft 12 and jackshaft 13 has shift drive mechanism 50.

In the lower section of main shaft 12 and the height and position roughly the same with bent axle 10, shift fork axle 51 is erected at crankcase 2 Between left and right vertical bearing wall 2Lv, 2Rv, and then, in the lower section of shift fork axle 51, drum 52 of shifting gears is erected at the left and right of crankcase 2 Between vertical bearing wall 2Lv, 2Rv, by e axle supporting in selector fork 53a, 53b, 53c turning by gearshift drum 52 of shift fork axle 51 Dynamic and be axially moveable, drive gear set 12g and each of driven gear group 13g for selecting normally meshed gear variator M is nibbled Gear mesh in the gear mesh of conjunction, effectively entering action edge transmission is carrying out speed change.

In the oblique back lower place of gearshift drum 52, gearshift main shaft 54 is set up in the right side from left-external side through left vertical bearing wall 2Lv Vertical bearing wall 2Rv, the rotation of main shaft 54 of shifting gears makes the action of gear switching mechanism 55, and gearshift drum 52 is rotated (Fig. 5 references).

Fig. 8 is the left side view of the internal combustion engine 1 for eliminating left crankcase 2L and right crankcase 2R being observed from inner side, right bent axle Mating surface 2Rf (with the part shown in grid hatching) coordinated with left crankcase 2L of case 2R is with ring-type (a part of cylinder part Divide and be cut off) illustrate.

Fig. 9 is the right side view of the internal combustion engine 1 for eliminating right crankcase 2R and left crankcase 2L being observed from inner side, left bent axle Mating surface 2Lf (with the part shown in grid hatching) coordinated with right crankcase 2R of case 2L is with ring-type (a part of cylinder part Divide and be cut off) illustrate.

Crank chamber 2C and variator room 2M of left and right crankcase 2L, 2R are formed together with left and right vertical bearing wall 2Lv, 2Rv Crankcase periphery wall 2Ls, 2Rs cover periphery in the following manner：From the front of balance shaft 15 around the lower section of bent axle 10 and often The lower section of meshed gear transmission M and towards rear, at the rear of normally meshed gear variator M around upward, and then arrives Up to the top (with reference to Fig. 8, Fig. 9) of normally meshed gear variator M.

The mutual inner side ends of crankcase periphery wall 2Ls, 2Rs are mating surfaces 2Lf, 2Rf.

The upper back of the variator room 2M in left and right crankcase 2L, 2R, breather chamber 61 is bloated upward and by spaced walls 2Lt, 2Rt separate from variator room 2M, and are formed across left and right crankcase 2L, 2R.(with reference to Fig. 5, Fig. 8, Fig. 9).

Breather chamber 61 is formed as maze-type structure, and to blow-by gas gas-liquid separation is carried out, and has isolated the blowby gas of oil Body is derived to outside from ventilation delivery line 62 (with reference to Fig. 9), and the ventilation delivery line 62 is from the embedded left crankcase 2L sides in top Breather chamber 61.

Fig. 7 is the right side view of the state after the unloading on right crankcase cover 7 of above-mentioned internal combustion engine 1, in right crankcase 2R Show together with right vertical bearing wall 2Rv protrusion be formed at the ring-type frame wall 2Rss of right flank its right end face, i.e. with right song Right side mating surface 2Rg (with the part shown in grid hatching) of the ring-type that axle box cover 7 coordinates.

Spaced walls 2Rt of the formation breather chamber 61 of right crankcase 2R extend to right side mating surface 2Rg and constitute venting channels 60d (with reference to Fig. 5), the opening of venting channels 60d is formed at the position by the top at the rear portion of right side mating surface 2Rg of ring-type.

The right crankcase cover 7 for covering the right side of right crankcase 2R is generally formed into by cover lateral wall 7v and cover periphery wall 7s It is bowl-shape, match somebody with somebody end face, i.e. mating surface 7g (with reference to Fig. 6) of cover periphery wall 7s and the right side of the ring-type frame wall 2Rss of right crankcase 2R Conjunction face 2Rg is abutted each other, and speed change clutch 30 is accommodated in into inside and right crankcase cover 7 is fixedly installed in into right crankcase 2R.

Figure 6 illustrates the internal view of the right crankcase cover 7 on the right side for covering right crankcase 2R.

In the circular plate like portion opposed with speed change clutch 30 of the inner surface of the cover lateral wall 7v of right crankcase cover 7 Center portion point, is formed with cylindrical portion 7a that tapered portion 37a of the terminal part for trip(ping) lever 37 is inserted, also, along from center Cylindrical portion 7a go up rearward and slightly rearward inclined radiation direction, stretch out and be provided with clutch cam axle 39.

With reference to Fig. 5 and Fig. 6, clutch cam axle 39 is rotatably supported on the shaft on the cylindrical portion with right crankcase cover 7 Inboard bearing boss portion 7b that 7a forms as one and outboard bearing boss portion 7c for being formed at cover periphery wall 7s.

Clutch cam axle 39 it is vertical with cylindrical portion 7a and run through inboard bearing boss portion 7b, cam part 39a and trip(ping) lever Tapered portion 37a engaging in 37 insertion cylindrical portion 7a.

In the end for running through outboard bearing boss portion 7c laterally of clutch cam axle 39, clutch operating bar is embedded in 40 base end part.

The inner side at the position of spaced walls 7e formation outboard bearing boss portion 7c to the right in the cover periphery wall 7s of crankcase cover 7 Bloat, and formed to mating surface 7g from the inner surface of cover lateral wall 7v, spaced walls 7e separate variator room 2M, and along outside cover Perisporium 7s towards vehicle-width direction constitutes venting channels 60c.

Clutch cam axle 39 runs through venting channels 60c.

When right crankcase cover 7 is installed in right crankcase 2R, the ventilation formed in mating surface 7g of right crankcase cover 7 The opening of passage 60c is aligned with the opening of the venting channels 60d formed in right side mating surface 2Rg of right crankcase 2R, ventilates Passage 60c is connected with venting channels 60d.

In inboard bearing boss portion 7b and outboard bearing boss of the e axle supporting clutch cam axle 39 of right crankcase cover 7 Between spaced walls 7e near portion 7c, barrel 7d is formed with along cover lateral wall 7v, the inside of barrel 7d becomes and supplies clutch Camshaft 39 is through insertion through patchhole 60b.

That is, through patchhole 60b from the axially opposed central part P with main shaft 12 along radiation direction towards peripheral part Q forms the part contacted with inboard bearing boss portion 7b of central part P of the barrel 7d through patchhole 60b through arranging Be cut off, and be formed with the ventilation introducing port 60a through patchhole 60b openings to inner side (with reference to Fig. 5, Fig. 6).

Venting channels 60c is reached through the peripheral part Q of patchhole 60b and generally perpendicularly connect with venting channels 60c.

There is interval between the inner surface and clutch cam axle 39 of barrel 7d through patchhole 60b and lead to as ventilation Road plays a role, therefore, near the axially opposed central part P with main shaft 12 of the cover lateral wall 7v of right crankcase cover 7 Clutch chamber 8 opening ventilation introducing port 60a via in side wall 7v outside the cover along radiation direction extension through patchhole 60b so via in the ring-type frame wall 2Rss of perisporium 7s outside the cover and right crankcase 2R along vehicle-width direction extend ventilation lead to Road 60c, 60d, connect with breather chamber 61.

It is in concentric in the peripheral of cylindrical portion 7a in the inner surface of the cover lateral wall 7v of right crankcase cover 7 with reference to Fig. 6 Shape is projected and is formed with cylindrical wall 7f.

Cylindrical wall 7f has makes ventilation introducing port 60a be located at the diameter of inner side, and will prolong along radiation direction from cylindrical portion 7a The cutaway existing for barrel 7d stretched.

In the ventilation device of this internal combustion engine 1, for passing through the clutch cam axle 39 of the Detaching and Lapping of speed change clutch 30 Intert into the vicinity through the patchhole central part P that 60b's and main shaft 12 is axially opposed, form oriented clutch chamber 8 The ventilation introducing port 60a of side (variator room 2M sides) opening, make the ring-type frame wall 2Rss of cover periphery wall 7s and right crankcase 2R from Through the peripheral part Q of patchhole 60b, via upper in venting channels 60c, the 60d and crankcase 2 bored a hole along vehicle-width direction The breather chamber 61 of portion's rear space is connected, therefore, it is involved in because of speed change clutch 30 the blow-by gas in clutch chamber 8 will be flowed into Rotation and in the rotary current that produces and when separating oil using centrifugal force, near the central part of the inner side of cylindrical wall 7f The blow-by gas of residual are imported from ventilation introducing port 60a runs through patchhole 60b, and from become venting channels through patchhole 60b is imported into breather chamber 61 through venting channels 60c, 60d of connection, and in breather chamber 61 gas-liquid separation is further carried out.

Ventilation introducing port 60a eliminates oil and residual to a certain extent near the central part of speed change clutch 30 The blow-by gas stayed near central part are imported into ventilation introducing port 60a, therefore, following situations will not occur：Blow-by gas In reduction oil immersion ventilation introducing port 60a and block ventilation introducing port 60a.

In addition, be formed as opposed with the side of speed change clutch 30 through the ventilation introducing port 60a of patchhole 60b, therefore, Oil mostly disperses to the peripheral of speed change clutch 30 because of the rotation of speed change clutch 30, hardly from speed change clutch 30 side is dispersed to side, and oil runs through patchhole from the ventilation introducing port 60a immersions opposed with the side of speed change clutch 30 The probability of 60b is relatively low.

It is convex by the use of the clutch formed on the side wall as the right crankcase cover 7 of clutch cap in this ventilation device Wheel shaft (clutch release shaft) 39 through patchhole 60b as venting channels, therefore venting channels, energy need not be particularly formed Enough reduces costs, and, it is to avoid because the cover lateral wall 7v in right crankcase cover 7 newly forms venting channels and caused right crankcase Cover (clutch cap) expansion vertically, is prevented from internal combustion engine and integrally becomes big.

As shown in figure 5, through the peripheral part Q of patchhole 60b be in along the end on observation of bent axle 10 when and breather chamber 61 positions for overlapping, therefore, it is logical that ventilation is point-blank formed vertically to breather chamber 61 from the peripheral part Q through patchhole 60b Road 60c, 60d, can shorten venting channels 60c, 60d, and easily carry out processing through setting for venting channels 60c, 60d.

In addition, as shown in figure 5, venting channels 60c, 60d with through patchhole 60b it is vertical in peripheral part Q, therefore, appearance Easily carry out together with venting channels 60c, 60d through patchhole 60b through setting processing.

Formed towards peripheral part Q along oblique upper from central part P through patchhole 60b, therefore, the quilt in breather chamber 61 Oil after gas-liquid separation can by venting channels 60c, 60d, flow down in through patchhole 60b and from ventilation introducing port 60a is expelled in clutch chamber 8 and then variator room 2M.

Also, carry out gas-liquid separation in breather chamber 61 and the blow-by gas after eliminating oil are led from the ventilation of top Outlet pipe 62 is derived, and by being directed to air filter 73 with the ventilation breather (not shown) that is connected of delivery line 62, and again It is secondary to be attracted in the gas handling system of internal combustion engine 1 for burning.

Claims (7)

1. a kind of ventilation device of internal combustion engine, in crankcase (2), e axle supporting has bent axle (10), and is accommodated with variator (M),

Blow-by gas are carried out with the upper back space that the breather chamber (61) of gas-liquid separation is formed in the crankcase (2),

In the end that the side to the crankcase (2) of the main shaft (12) of the variator (M) is prominent, speed change clutch is provided with Device (30),

The speed change clutch (30) arranged in the side of the crankcase (2) is covered by clutch cap (7), the clutch cap (7) be formed as bowl-shape by cover lateral wall (7v) and cover periphery wall (7s),

On the cover lateral wall (7v) of the clutch cap (7), from the axially opposed central part (P) with the main shaft (12) Running through towards peripheral part (Q) along radiation direction has through patchhole (60b),

Make the speed change clutch (30) Detaching and Lapping clutch release shaft (39) be inserted it is described through patchhole (60b) in,

The ventilation device of the internal combustion engine is characterised by,

In the vicinity of the central part (P) through patchhole (60b), oriented variator room (2M) side opening is formed Ventilation introducing port (60a),

The cover periphery wall (7s) and the crankcase (2) are entered from the peripheral part (Q) through patchhole (60b) Eleven punch 11, forms the venting channels (60c, 60d) connected with the breather chamber (61).

2. the ventilation device of internal combustion engine according to claim 1, it is characterised in that

The peripheral part (Q) through patchhole (60b) be in along the end on observation of the bent axle (10) when and institute State the position of breather chamber (61) coincidence.

3. the ventilation device of internal combustion engine according to claim 1, it is characterised in that

The venting channels (60c, 60d) are vertical at the peripheral part (Q) through patchhole (60b) with described.

4. the ventilation device of internal combustion engine according to claim 2, it is characterised in that

The venting channels (60c, 60d) are vertical at the peripheral part (Q) through patchhole (60b) with described.

5. the ventilation device of the internal combustion engine described in any one in claim 1 to claim 4, it is characterised in that

The ventilation introducing port (60a) through patchhole (60b) is formed as the side with the speed change clutch (30) It is opposed.

6. the ventilation device of the internal combustion engine described in any one in claim 1 to claim 4, it is characterised in that

It is described to be formed towards the peripheral part (Q) along oblique upper from the central part (P) through patchhole (60b).

7. the ventilation device of internal combustion engine according to claim 5, it is characterised in that

It is described to be formed towards the peripheral part (Q) along oblique upper from the central part (P) through patchhole (60b).