CN101956589B - Ventilation structure of engine - Google Patents
Ventilation structure of engine Download PDFInfo
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- CN101956589B CN101956589B CN 201010230224 CN201010230224A CN101956589B CN 101956589 B CN101956589 B CN 101956589B CN 201010230224 CN201010230224 CN 201010230224 CN 201010230224 A CN201010230224 A CN 201010230224A CN 101956589 B CN101956589 B CN 101956589B
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- air bells
- detector
- chamber
- gear
- bells chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/027—Gearboxes; Mounting gearing therein characterised by means for venting gearboxes, e.g. air breathers
Abstract
The invention provides a ventilation structure of an engine. The ventilation structure comprises an engine case for accommodating an air valve transmission mechanism or a transmission, a ventilation chamber for communicating the inside and the outside of the engine case to separate gas blow-by flow, and a detector supported in the engine case and used for detecting the state in the engine case. In the ventilation structure of the engine, miniaturization of the engine is realized by improving the structure of the ventilation chamber. Most of the shape of the detector is columnar, at least one part of the detector is arranged in the ventilation chamber, and a labyrinth sealing ring of the ventilation chamber is formed on the lateral surface of the detector.
Description
Technical field
The present invention relates to a kind of aeration structure of mobile engine.
Background technique
Disclose the structure (for example, with reference to patent documentation 1) that disposes starting motor, air bells chamber, velocity transducer on the top of crankcase.
Patent documentation 1: TOHKEMY 2008-126681 communique
In the prior art, be arranged because the upper wall of the upper wall of formation air bells chamber and supporting velocity transducer divides, so motor maximizes.
Summary of the invention
The object of the invention is to improve the structure of air bells chamber, realize the miniaturization of motor.
The present invention is the technology that has solved the problems referred to above, and the aeration structure of technological scheme one described motor possesses:
Accommodate valve actuating gear or speed changer engine case,
Be communicated with the inside and outside of described engine case and with the air bells chamber of gas blowby gas-liquid separation,
Be supported on described engine case and detect the detector of the state in the engine case, the aeration structure of described motor is characterised in that,
The major part of the profile of described detector is column, and at least a portion of described detector is configured in the air bells chamber, is formed the labyrinth type sealing ring of air bells chamber by the side of this detector.
Described engine case comprises crankcase, working cylinder, working-cylinder head and clutch release slave cylinder housing etc.
On the basis of the aeration structure of technological scheme one described motor, the aeration structure of technological scheme two described motors is characterised in that,
The sidewall of described detector is opposed at adjacent portion and this entrance opening of air bells chamber's entrance opening, and the roughly along the vertical direction configuration of the axis of described detector.
On the basis of the aeration structure of technological scheme one or technological scheme two described motors, the aeration structure of technological scheme three described motors is characterised in that,
Described air bells chamber has through hole at diapire,
Described detector disposes to the outstanding mode in the below of described through hole with its underpart,
Between the interior week of the sidewall of described detector and described through hole, be provided with the gap.
On the basis of the aeration structure of technological scheme one or technological scheme three described motors, the aeration structure of technological scheme four described motors is characterised in that,
Described engine case is the case of accommodating speed changer,
Described detector is the vehicle speed sensor with the gear arranged opposite of described speed changer.
On the basis of the aeration structure of technological scheme one～technological scheme four described motors, the aeration structure of technological scheme five described motors is characterised in that,
Described air bells chamber is configured in the top of speed changer,
In described air bells chamber, dispose the oil circuit that supplies to in-engine lubricant housings fuel feeding,
On the next door between the gear teeth wheels of described confession oil circuit and speed changer, form the oil circuit that splashes that spreads all over left and right sides engine case along transmission shaft,
From described for oil circuit to the described oil circuit fuel feeding that splashes, and from the spray-hole of the described oil circuit that splashes to the assigned position of the gear teeth wheels fuel feeding that splashes, and lubricated gear teeth wheels.
On the basis of the aeration structure of technological scheme one～technological scheme three described motors, the aeration structure of technological scheme six described motors is characterised in that,
Described engine case is the case of accommodating valve actuating gear,
Described detector is the cam pulses generator with the camshaft arranged opposite of described valve actuating gear.
The invention effect
In the invention of technological scheme one,
Expose in the air bells chamber side of detector, forms the labyrinth type sealing ring of air bells chamber by detector self.
Owing to abolished the part of the supporting boss of the side that covers in the prior art detector, so the capacity of air bells chamber becomes large.
And, because a part of having cut down supporting boss, so the engine case quality lightens.
And then, owing to form labyrinth type sealing ring by detector self, therefore can improve the gas-liquid separation performance.
In the invention of technological scheme two,
By making from the gas blowby of air bells chamber's entrance intrusion and the contacts side surfaces of detector, reduce the speed of gas blowby, make oily part be attached to the side of detector, the oil that makes the sidewall that is attached to detector drops downwards along the sidewall of the detector that axis disposes along the vertical direction, therefore can carry out well gas-liquid separation.
In the invention of technological scheme three,
Can be with the through hole of air bells chamber's diapire as oily return aperture utilization, and prevent that by detector oil from invading from through hole.
In the invention of technological scheme four,
Owing to vehicle speed sensor is used for forming the labyrinth type sealing ring of air bells chamber as the speed of a motor vehicle detection of original purposes and with its outer surface, so can effectively utilizes the shape of vehicle speed sensor.
In the invention of technological scheme five,
Since guarantee air bells chamber's capacity and the oil circuit that will splash be configured in speed changer near, therefore can be lubricated to assigned position.
In the invention of technological scheme six,
Detect and form the labyrinth type sealing ring of air bells chamber with its outer surface because the cam pulses generator is used for camshaft angle as original purposes, so can effectively utilize the shape of cam pulses generator.
Description of drawings
Fig. 1 is the longitudinal section of the related engine for motor bicycle of the first mode of execution of the present invention of observing from left.
Fig. 2 is the right elevation that takes off the state behind the right crankcase cover of above-mentioned motor.
Fig. 3 is the III-III profile stretch-out view of Fig. 1.
Fig. 4 is that (inboard) figure is looked on the right side of the left crankcase of above-mentioned motor.
Fig. 5 is that (internal surface) figure is looked on the left side of the right crankcase of above-mentioned motor.
Fig. 6 is the unfolded drawing of Fig. 4 and VI-VI section shown in Figure 5.
Fig. 7 is the unfolded drawing of Fig. 4 and VII-VII section shown in Figure 5.
Fig. 8 is the longitudinal section from the top of the related engine for motor bicycle of right-hand the second mode of execution of the present invention of observing.
Fig. 9 is the IX-IX sectional view of Fig. 8.
The reference numeral explanation
9 speed changers
25 velocity transducers
The circular cylindrical shell of 25a velocity transducer
28 valve actuating gears
44,46 for oil circuit
48 are communicated with oil circuit
65M, 65C speed change gear train
75 air bells chambers
76 labyrinth type sealing rings
77 dividing plates
78 gas flow siphunculus
81 air bells chamber's entrances
The diapire of 84 air bells chambers
85 bottom through holes
88 gaps
89 store oil sections
90 spray-holes
93 air bells chambers
96 valve actuating gears
97 camshaft angle detection devices
104 pulse oscillator rotors
104a detects and uses teat
106 cam pulses generators
The circular cylindrical shell of 106a cam pulses generator
108 air bells chamber's diapires
109 dividing plates
110 labyrinth type sealing rings
112 air bells chamber's entrances
114 gas flow siphunculus
116 bottom through holes
119 gaps
Embodiment
Fig. 1 is the longitudinal section of the related engine for motor bicycle 1 of the first mode of execution of the present invention of observing from left.In description of the present embodiment or accompanying drawing, front (F), left (L), right (R) etc. represent take vehicle as benchmark.The engine case of above-mentioned motor 1 (housing of motor) is made of crankcase 2, working cylinder 3, working-cylinder head 4 and clutch release slave cylinder housing 5.Crankcase 2 is for being divided into the form of left and right sides two halves, and detailed construction is made of left crankcase 2L, right crankcase 2R, left crankcase cover 6L and right crankcase cover 6R as shown in Figure 3.In Fig. 1, the left surface (inner side surface) of right crankcase 2R is shown, and the mating face 2Ra with left crankcase 2L is shown.In the following description, to the symbol mark L of the member in the left side of correspondence, to the symbol mark R of the member on right side.Be provided with crankshaft 7, trunnion shaft 8 at crankcase 2, main shaft 10, countershaft 11, shift fork supporting axle 12 and the speed transmission drum 13 of mesh gear speed changer 9 when normal.The chimeric piston 14 that is equipped with slidably on working cylinder 3 is connected with the crank pin 16 of crankshaft 7 by connecting rod 15, comes 7 rotations of driving crank axle according to the action of piston 14.Be formed with firing chamber 17 on the bottom of working-cylinder head 4, the top of piston 14.Be connected with intakeport 18, relief opening 19 in this firing chamber 17, and be provided with Aspirating valves 20 and the outlet valve 21 that makes these inner switchings.Thereby Aspirating valves 20 and outlet valve 21 open and close with the rotary synchronous driving of crankshaft 7 by the valve actuating gear 28 that possesses rocking arm 68, and wherein rocking arm 68 is driven for the pair of cams axle 30 that can rotate by supporting between working-cylinder head 4 and clutch release slave cylinder housing 5 respectively.Be connected with throttle-valve body 22 and Fuelinjection nozzle 23 at intakeport 18.Rear upper surface at crankcase 2 is provided with starting motor 24 and velocity transducer 25.At shift fork supporting axle 12 a pair of reverse shift fork 26 is installed.On trunnion shaft 8, be provided with integratedly counterbalance 27.
Fig. 2 is the right elevation that takes off the state behind the right crankcase cover 6R of above-mentioned motor 1.Among the figure, the right surface (outer side surface) of right crankcase 2R is shown and mating face 2Rb with right crankcase cover 6R is shown.Can observe from the opening that takes off right crankcase cover 6R, be provided with the equipment group on the right surface of right crankcase 2R.
Right-hand member the place ahead, trunnion shaft 8 at crankshaft 7 is provided with water pump 36.Because counterbalance is positioned at the opposite side of the vertical wall of right crankcase 2R, therefore in this figure, do not observe.Below main shaft 10, be provided with speed change gear 37.
Below crankshaft 7, be provided with oil pump 38.The oil of discharging from this oil pump 38 via with the right side (the front side of figure) of oil pump 38 in abutting connection with and be arranged at oil strainer 39 on the wall body of right crankcase cover 6R, and via the rising oil circuit 40 in the wall body that is formed at right crankcase cover 6R the oil circuit branching portion 41 to crankcase top is carried, carry to in-engine each lubricant housings thus.
In the drawings, main shaft right side bearing portion 42R and countershaft right side bearing portion 43R have been shown.Above main shaft right side bearing portion 42R and countershaft right side bearing portion 43R, be provided with for oil circuit 44,45,46.Supply to the speed change gear train 65C (Fig. 3) of countershaft 11 from the axle side via the center hole 11a of countershaft shown in Figure 3 11 via the oil that supplies to countershaft right side bearing portion 43R for oil circuit 44,45 from above-mentioned oil circuit branching portion 41.From being communicated with main shaft left side bearing portion 42L (Fig. 4) towards the supplying oil circuit 47 (Fig. 4) of oblique below via extending into to left for oil circuit 46 for oil circuit 44 branches.The oil of supplying with supplies to the speed change gear train 65M of main shaft 10 from the axle side via the center hole 10a (Fig. 3) of main shaft 10.
Fig. 3 is the III-III sectional stretch-out view of Fig. 1.Crankcase 2 is by vertical the form that is divided into left and right sides two halves of separating by the clutch release slave cylinder axis, is made of left crankcase 2L, right crankcase 2R, left crankcase cover 6L and right crankcase cover 6R.The upper surface of crankcase 2 under be connected with working cylinder 3, working-cylinder head 4, clutch release slave cylinder housing 5 in turn.Be provided with the spark plug 49 in the face of firing chamber 17 in the bottom of working-cylinder head 4.Crankshaft 7 is supported on left and right sides crankcase 2L, vertical wall 2Lv, the 2Rv of 2R that forms crankshaft room 50 by metal bearing 51A, 51B.Main shaft 10 is supported on left and right sides crankcase 2L, 2R by ball bearing 52A, 52B.Countershaft 11 is supported on left and right sides crankcase 2L, 2R by ball bearing 53A, 53B.
Left extension part at crankshaft 7 is provided with alternator 54, and it is covered by left crankcase cover 6L.The stator 54A of alternator 54 is fixed in the internal surface of left crankcase cover 6L.The rotor 54B of alternator 54 is fixed in the left end of crankshaft 7.Starting driven gear 55 is adjacent with metal bearing 51A and be set to can rotate with respect to crankshaft 7.The rotation of starting driven gear 55 is delivered to crankshaft 7 by the rotor 54B of mono-directional overrun clutch 56 and alternator 54.
Be fixed with successively subsidiary engine actuation gear 57, cam chain driving sprocket wheel 29 at the right-hand extension part of crankshaft 7, with the transmission of power of the crankshaft 7 elementary actuation gear 58 to speed changer 9.Subsidiary engine actuation gear 57 is by trunnion shaft 8 driven equilibrium spares 27 (Fig. 1), and the water pump 36 (Fig. 2) that is connected with trunnion shaft 8 of driving.In cam chain chamber 59, hang with cam chain 32 at cam chain driving sprocket wheel 29 and cam chain driven sprocket 31 volumes that are arranged at the right-hand member of camshaft 30.
Be provided with multidisc clutch 60 in the right part of main shaft 10, hub 61 is fixed with the elementary driven gear 62 that receives power from above-mentioned elementary actuation gear 58 outside this clutch.Hub 63 is fixed on the main shaft 10 in the clutch.By driver's clutch operation, be switched on or switched off power according to a plurality of friction plates 64 between the hub 63 in the outer hub 61 of clutch and the clutch.The speed change that is provided with mesh gear speed changer 9 when normal at main shaft 10 and countershaft 11 is with gear train 65M, 65C, and speed change is to a speed～six speed by the operation of speed change gear 37 (Fig. 2).Countershaft 11 is output shafts of this speed changer 9, is fixed with rear wheel drive with sprocket wheel 66 at the left end of countershaft 11, and hangs volume and rear wheel drive is arranged with chain 67.
Fig. 4 is that (inboard) figure is looked on the right side of the left crankcase 2L of above-mentioned motor 1, and the mating face 2La with right crankcase 2R is shown.Among the figure, remove running shaft, crankshaft left side bearing portion 70L, trunnion shaft left side bearing portion 71L, main shaft left side bearing portion 42L have been shown, and countershaft left side bearing portion 43L, declutch shift shaft left side support 72L, speed transmission drum left side bearing portion 73L, variable-speed shaft left side bearing portion 74L.
Among the figure, above countershaft 11, be formed with and be communicated with the inside and outside air bells chamber 75 of crankcase 2.Illustrated air bells chamber 75 is the left 75L of air bells chamber, with the integrated and air bells chamber 75 of complete of the right 75R of air bells chamber (Fig. 5) that forms at right crankcase 2R.In the inside of the left 75L of air bells chamber, the dividing plate 77L and the left crankcase 2L that consist of labyrinth type sealing ring 76 form.Erect to be provided with at the upper wall of the left 75L of air bells chamber and be communicated with the inside and outside gas flow siphunculus 78 in air bells chamber 75.In addition, between working cylinder assembly department 79 and air bells chamber 75, be provided with starting motor assembly department 80.
Fig. 5 is that (internal surface) figure is looked on the left side of the right crankcase 2R of above-mentioned motor 1, and the mating face 2Ra with left crankcase 2L is shown.Among the figure, crankshaft right side bearing portion 70R, trunnion shaft right side bearing portion 71R, main shaft right side bearing portion 42R have been shown, and countershaft right side bearing portion 43R, declutch shift shaft right side support 72R, speed transmission drum right side bearing portion 73R, variable-speed shaft right side bearing portion 74R.
Among the figure, the right 75R of air bells chamber that is connected with the left 75L of air bells chamber shown in Figure 4 is shown above the bearing portion 43R of countershaft right side.When left and right sides crankcase 2L, 2R were fit, the 75L of air bells chamber, the left and right sides, 75R were fit, the air bells chamber 75 that is integrally formed, a series of space of inner formation.In the inside of the right 75R of air bells chamber, the dividing plate 77R that consists of labyrinth type sealing ring 76 also forms with right crankcase 2R.Dividing plate 77R is arranged on the position corresponding with the dividing plate 77L of left crankcase 2L.Velocity transducer 25 with its axis roughly along the vertical direction mode be installed on the right 75R of air bells chamber.And rectangular air bells chamber entrance 81 is arranged at the opposite side of velocity transducer 25, can observe a part.
Fig. 6 is the unfolded drawing of Fig. 4 and VI-VI section shown in Figure 5, and left and right sides crankcase 2L, 2R are fit and consisted of the crankcase 2 of one.Among the figure, it is fit that the 75L of air bells chamber, the left and right sides, 75R have been shown, and forms the unfolded drawing of section and the Chang Shi mesh gear speed changer 9 of a series of air bells chamber 75.Air bells chamber's entrance 81 is arranged at right crankcase 2R, erects the top that is arranged at left crankcase 2L as the gas flow siphunculus 78 of the outlet of gas.
Since velocity transducer be arranged at as mentioned above air bells chamber's entrance 81 near, the side impact of the gas blowby of therefore invading and the circular cylindrical shell 25a of velocity transducer 25, the speed of gas descends, oily part is attached to the side of above-mentioned circular cylindrical shell 25a.Drop downwards in the side of the circular cylindrical shell 25a of the velocity transducer 25 that the oil that is attached to the side disposes along the vertical direction along axis, the gap 88 between velocity transducer 25 and bottom through hole 85 drops to the crankshaft room 50 and is recovered.
The function of the dividing plate 77 of above-mentioned velocity transducer 25 performance labyrinth type sealing rings 76.And in this air bells chamber's structure, the bottom through hole 85 of air bells chamber's diapire 84 utilizes as oily return aperture, and prevents that by velocity transducer 25 oil is from 85 intrusions of bottom through hole.The tooth top section of the 5th fast gear M5w of the front end of velocity transducer 25 and main shaft described later 10 is opposed.Above-mentioned velocity transducer is magnetic sensor, with the tooth top of gear by the time magnetic flux change be converted into electrical signal, thereby detect the rotational speed of gear.
In Fig. 6, be provided with multidisc clutch 60 at main shaft 10.The speed change of main shaft 10 is made of the fast gear M1x of a speed～six, M2x, M3s, M4s, M5w, M6w with gear train 65M.The speed change of countershaft 11 is made of the fast gear C 1w of a speed～six, C2w, C3w, C4w, C5s, C6s with gear train 65C.M is the attached gear of main shaft, and C is the attached gear of countershaft, one～six numeral speed change level.Diacritic x is with the axle one or is fixed on gear on the axle, and diacritic w is that the assigned position on axle can be with respect to the gear of axle idle running, and diacritic s keeps by spline, can not dally but gear in axial sliding.Above-mentioned gear consists of speed change gear train 65 with the engagement of corresponding gear.Coming to drive speed transmission drum 13 (Fig. 1) by speed change gear 37 (Fig. 2) according to driver's idea rotates, the reverse shift fork 26 (Fig. 1) that is supported on shift fork supporting axle 12 and is embedded in the telescoping groove G of gear (diacritic s) in axial sliding drives the in axial sliding gear (diacritic s) of regulation, it is engaged with adjacent idler gear (diacritic w) and carries out speed change.
The 5th fast gear M5w of above-mentioned main shaft 10 is idler gear, not with main shaft 10 interlocks, all the time with as not the dallying of countershaft 11 of output shaft and in axial sliding gear C 5s engagement, therefore with countershaft 11 interlocks.Countershaft 11 also by rear wheel drive with sprocket wheel 66 and rear wheel drive with chain 67 and with the trailing wheel interlock of vehicle.The rotational speed of the trailing wheel of vehicle and the ground speed of vehicle are roughly proportional.Thus, can detect main shaft 10 the 5th fast gear M5w rotational speed and calculate the speed of vehicle.
Fig. 7 is the unfolded drawing of Fig. 4 and VII-VII section shown in Figure 5.From shown in Figure 2 for oil circuit 44 branches for oil circuit 46, extend to left as shown in Figure 7, so become as Fig. 4 and shown in Figure 7 extend downwards for oil circuit 47, thereby be communicated with main shaft left side bearing portion 42L.The oil that main shaft left side bearing portion 42L supplies with is supplied with gear train 65M the speed change of main shaft 10 from the axle side via the center hole 10a of main shaft 10.
Be provided with abreast store oil section 89 with supplying oil circuit 46.Store oil section 89 is the deep holes that will pass the opposed section that is arranged at left crankcase 2L and right crankcase 2R to upper and form.Be communicated with oil circuit 48 for being provided with between oil circuit 46 and the store oil section 89.Be provided with towards the spray-hole 90 of speed change with gear train 65M in the bottom at the two ends of store oil section 89.Form the oil circuit that splashes by above-mentioned connection oil circuit 48, store oil section 89 and spray-hole 90.This oil circuit that splashes is near speed changer 9 configuration, can spray oil with the tooth top section of gear train 65M and is lubricated towards speed change, therefore the engaging piece of the speed change of lubricating spindle 10 and countershaft 11 gear train 65M, 65C effectively.
In the above-described embodiment, show the example of top that the air bells chamber is arranged at the speed changer at crankcase rear portion.In the inside of above-mentioned engine case (housing of motor), be communicated with by the cam chain chamber in the clutch release slave cylinder housing that contains valve actuating gear from crankshaft room.Thus, the air bells chamber be not must with crankcase in abutting connection with setting, also can be arranged on the position beyond the crankcases such as working cylinder, working-cylinder head or clutch release slave cylinder housing.
And, in the above-described embodiment, show velocity transducer as the example of detector.But, can also be the parts beyond the velocity transducer as detector, such as the cam pulses generator of camshaft angle detection device, the position-detection sensor of movable valve etc. is so long as the major part of profile is cylindric or prism-shaped gets final product.
Fig. 8 is the longitudinal section from the top of the related engine for motor bicycle of right-hand the second mode of execution of the present invention of observing.Fig. 9 is the IX-IX sectional view of Fig. 8.Present embodiment is the example of the upside of air bells chamber 93 valve cage 92 that is arranged at the motor top.Among the figure, air bells chamber 93 and the camshaft angle detection device 97 on the top that the part that is arranged on the valve actuating gear 96 between working-cylinder head 94 and the clutch release slave cylinder housing 95 is shown, is arranged at valve actuating gear 96.
As the part of valve actuating gear 96, in Fig. 8, cam chain 98, suction side camshaft 99, exhaust side camshaft 100, suction side cam chain driven sprocket 101 and exhaust side cams chain driven sprocket 102 etc. have been shown.Cam chain driven sprocket 101,102 is installed in and camshaft 99, the 100 integrally formed 99a of mounting flange section, 100a by construction bolt 103.Particularly, suction side cam chain driven sprocket 101 with the pulse oscillator rotor 104 of a part that becomes camshaft angle detection device 97 by locating stud 105 location and jointly be fastened to the 99a of mounting flange section of suction side camshaft 99 by construction bolt 103.
The air bells chamber 93 that connects the top of valve actuating gear 96 is equipped with the cam pulses generator 106 of a part that becomes camshaft angle detection device 97.The front end of cam pulses generator 106 is positioned at outside the radial direction of detection with teat 104a of above-mentioned pulse oscillator rotor 104.Cam pulses generator 106 is magnetic sensor, with the detection of impulser rotor 104 with teat 104a by the time magnetic flux change be converted to electrical signal, thereby detect the rotational position of cam, its testing result is used for the determining of fuel injection time point of Fuelinjection nozzle.
The air bells chamber 93 that is arranged at the top of valve actuating gear 96 is surrounded the chamber that forms by the wall of air bells chamber's upper wall 107, air bells chamber's diapire 108 and air bells chamber all around, forms labyrinth type sealing ring 110 by a plurality of dividing plates 109 of inside.Because valve cage 92 is communicated with the crankshaft room (not shown) of below, so the gas blowby in the crankshaft room is via cam chain chamber 111 and valve cage 92 and from air bells chamber's entrance flow ventilation chambers 93 112.Gas by air bells chamber 93 is carried to air filter via the gas flow siphunculus 114 of rear wall 113.
Because cam pulses generator 106 is arranged in the air bells chamber 93 as mentioned above, the side impact of the gas blowby of therefore invading and the circular cylindrical shell 106a of cam pulses generator 106, the speed of gas descends, and the part of the oil that contains in the gas is attached to the side of circular cylindrical shell 106a.Because cam pulses generator 106 disposes along the vertical direction with the axis of circular cylindrical shell 106a, therefore the oil that is attached to the side drops downwards along the side of circular cylindrical shell 106a, gap 119 between cam pulses generator 106 and bottom through hole 116 drops to the valve cage 92, is recovered behind lubricated valve actuating gear 96.
The function of the dividing plate of the circular cylindrical shell 106a performance labyrinth type sealing ring 110 of cam pulses generator 106.In this air bells chamber's structure, the bottom through hole 116 of air bells chamber's diapire 108 utilizes as oily return aperture, and self prevents that by cam pulses generator 106 oil is from 116 intrusions of bottom through hole.
In each mode of execution of above detailed record, can bring following effect.
(1) because expose in the air bells chamber side of the detectors such as velocity transducer or cam pulses generator, forms the labyrinth type sealing ring of air bells chamber by above-mentioned detector self, so can improve the gas-liquid separation performance.In addition, owing to abolished the in the prior art part of the supporting boss of the side of coverage speed sensor, so the capacity of air bells chamber becomes large.And owing to cut down the part of the supporting boss that arranged in the past, the engine case quality lightens.
(2) by making gas blowby or the gas blowby that passes through the air bells chamber and the contacts side surfaces of above-mentioned detector of invading from air bells chamber's entrance, reduce the speed of gas blowby, make oily part be attached to the side of detector, dropped downwards in the side of the detector that the oil that is attached to the side disposes along the vertical direction along axis, therefore can carry out well gas-liquid separation.
(3) can be with the bottom through hole of air bells chamber's diapire as oily return aperture utilization, and prevent that by detector self oil from invading from the bottom through hole.
(4) owing to vehicle speed sensor is used for that the speed of a motor vehicle as original purposes detects and forms the labyrinth type sealing ring of air bells chamber with its outer surface, therefore can effectively utilize the shape of vehicle speed sensor.
(5) in the first embodiment since guarantee air bells chamber's capacity and the oil circuit that will splash be configured in speed changer near, therefore can spray oil towards the tooth top section of gear, thereby can effectively be lubricated the engaging piece of speed change with gear train.
(6) owing to the cam pulses generator is used for camshaft angle as original purposes detects and form the labyrinth type sealing ring of air bells chamber with its outer surface, so can effectively utilize the shape of cam pulses generator.
Claims (6)
1. the aeration structure of a motor, it possesses:
Accommodate valve actuating gear or speed changer engine case,
Be communicated with the inside and outside of described engine case and with the air bells chamber of gas blowby gas-liquid separation,
Be supported on described engine case and detect the detector of the state in the engine case,
The aeration structure of described motor is characterised in that,
The major part of the profile of described detector is column, and at least a portion of described detector is configured in the air bells chamber, is formed the labyrinth type sealing ring of air bells chamber by the side of this detector.
2. the aeration structure of motor according to claim 1 is characterized in that,
The sidewall of described detector is opposed at adjacent portion and this entrance opening of air bells chamber's entrance opening, and the roughly along the vertical direction configuration of the axis of described detector.
3. the aeration structure of motor according to claim 1 and 2 is characterized in that,
Described air bells chamber has through hole at diapire,
Described detector disposes to the outstanding mode in the below of described through hole with its underpart,
Between the interior week of the sidewall of described detector and described through hole, be provided with the gap.
4. according to claim 1 or the aeration structure of 3 described motors, it is characterized in that,
Described engine case is the case of accommodating speed changer,
Described detector is the vehicle speed sensor with the gear arranged opposite of described speed changer.
5. the aeration structure of motor according to claim 4 is characterized in that,
Described air bells chamber is configured in the top of speed changer,
In described air bells chamber, dispose the oil circuit that supplies to in-engine lubricant housings fuel feeding,
On the next door between the gear teeth wheels of described confession oil circuit and speed changer, form the oil circuit that splashes that spreads all over left and right sides engine case along transmission shaft,
From described for oil circuit to the described oil circuit fuel feeding that splashes, and from the spray-hole of the described oil circuit that splashes to the assigned position of the gear teeth wheels fuel feeding that splashes, and lubricated gear teeth wheels.
6. the aeration structure of motor according to claim 1 is characterized in that,
Described engine case is the case of accommodating valve actuating gear,
Described detector is the cam pulses generator with the camshaft arranged opposite of described valve actuating gear.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-166286 | 2009-07-15 | ||
| JP2009166286A JP5275934B2 (en) | 2009-07-15 | 2009-07-15 | Engine breather structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101956589A CN101956589A (en) | 2011-01-26 |
| CN101956589B true CN101956589B (en) | 2013-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010230224 Active CN101956589B (en) | 2009-07-15 | 2010-07-13 | Ventilation structure of engine |
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| Country | Link |
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| JP (1) | JP5275934B2 (en) |
| CN (1) | CN101956589B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5918095B2 (en) | 2012-09-26 | 2016-05-18 | 大豊工業株式会社 | Engine lubricant supply mechanism |
| CN103850754B (en) * | 2012-12-07 | 2016-12-21 | 光阳工业股份有限公司 | Engine blow gas leakage mechanism |
| JP6029514B2 (en) * | 2013-03-29 | 2016-11-24 | 本田技研工業株式会社 | Crankcase structure of internal combustion engine |
| JP6061752B2 (en) * | 2013-03-29 | 2017-01-18 | 本田技研工業株式会社 | Internal combustion engine |
| JP5850890B2 (en) * | 2013-08-02 | 2016-02-03 | 本田技研工業株式会社 | Breather structure of internal combustion engine |
| CN106855002B (en) * | 2015-12-09 | 2019-06-14 | 光阳工业股份有限公司 | Engine blows gas leakage mechanism |
| JP6623815B2 (en) * | 2016-02-19 | 2019-12-25 | スズキ株式会社 | Gas-liquid separator for internal combustion engines |
| JP6605424B2 (en) | 2016-09-30 | 2019-11-13 | 本田技研工業株式会社 | Saddle riding |
| JP2019214979A (en) | 2018-06-13 | 2019-12-19 | スズキ株式会社 | Internal combustion engine |
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| JP4776506B2 (en) * | 2006-11-16 | 2011-09-21 | 本田技研工業株式会社 | Power unit speed sensor mounting structure |
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| US6431159B2 (en) * | 2000-07-11 | 2002-08-13 | Honda Giken Kogyo Kabushiki Kaisha | Oil separator structure of internal combustion engine |
| US6672294B1 (en) * | 2003-01-09 | 2004-01-06 | Thomas A. Pirone | Rocker box oil separation vent system |
| CN101391629A (en) * | 2007-09-18 | 2009-03-25 | 雅马哈发动机株式会社 | Motorcycle |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5275934B2 (en) | 2013-08-28 |
| JP2011021522A (en) | 2011-02-03 |
| CN101956589A (en) | 2011-01-26 |
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