CN1153866A - Lubricating oil feeding device for four-stroke internal combustion engine - Google Patents

Abstract

The purpose of the invention is to supply sufficient oil to a total unit of a valve system by a small number of part items. In a four-cycle internal combustion engine mounted in a vehicle by an attitude large front tilting a cylinder, oil passages t13, t14, guiding oil supplied from an oil pump to an upper side wall 34b of a cylinder head cover 34 large front tilted similarly to the cylinder 32, are formed, a downstream end opening 34e of the oil passages t13, t14 is formed in an upper side wall inner surface of the cylinder head cover 34 toward a valve system 56 in an upper side of the internal combustion engine.

Description

The oil feeding device of quartastroke engine

The present invention relates to a kind of oil feeding device that cylinder is equipped on Valve Drive System in the quartastroke engine on the vehicle with big forward lean.

Oil circulation system in the quartastroke engine is except aspirating up the lubricant oil that accumulates below the crankcase from also driving lubricating pump by the rotation of bent axle the lubricant oil of lubricating oil tank, supply with the place that each needs, Valve Drive System structure wherein is on cylinder head, and be positioned at away from crankshaft room on the spaced position by cylinder, therefore, all be along cylinder arranged outside lubricant oil pipe arrangement from crankcase one side to cylinder head one side in the past.

Thisly open the example of putting down in writing in the flat 4-81525 communique the spy and describe with reference to Figure 11.

Figure 11 is the right, side view that this quartastroke engine 01 dispenses DC generator etc., and in quartastroke engine 01, cylinder body 03 protrudes in the place ahead from crankcase 02 with big leaning forward, and is connected with cylinder head 04 on its end.

Forming the big circular open 05 have crankcase 02 in the bent axle 05 that disposes along the left and right horizontal direction on the side of right crankcase 02, the discoideus substrate 06 that forms the through hole that connects for this bent axle 05 is sealed this circular open 05, in its arranged outside DC generator is arranged.

Constituted lubricating pump 08 in inside by substrate 06 mulched ground, can be supported with the pump shaft 09 parallel at bent axle 05 following with bent axle 05 with rotating freely, the actuation gear 010 that is flush-mounted on the bent axle 05 is meshing with each other with the driven gear 011 that is inlaid on the pump shaft 09, drives lubricating pump 08.

Driving by this lubricating pump 08 supplies to the place that each needs with lubricant oil, and wherein the lubricant oil of Valve Drive System is supplied with is by constituting by lubricating oil purifier 012 and the lubricant oil pipe arrangement 013 that forwards extends via cylinder body 03 below, the end of this lubricant oil pipe arrangement 013 is connected the center of top of cylinder cap 04, thereby be connected with valve driving chamber 014, lubricant oil supplied to the central authorities of valve driving chamber 014 by lubricant oil pipe arrangement 013.

Yet, under the situation of the quartastroke engine 01 that above-mentioned this cylinder leans forward significantly, the lubricant oil deficiency of supplying with to the Valve Drive System of upside often.

That is to say, supply with owing to be that the central authorities that are being positioned at the valve system on the upper-lower position carry out to the lubricant oil of valve driving chamber 014, the lubricant oil that is fed to valve driving chamber 014 has the supply of abundance to the Valve Drive System of downside, and the Valve Drive System of upside is difficult to supply with, lubricant oil is then often not enough.

In addition, owing to use lubricant oil pipe arrangement 013 supplying lubricating oil with cylinder block 03 and cylinder head 04 split, so part count is many, the installation exercise trouble.

The present invention is because above-mentioned problem produces, and its objective is provides a kind of oil feeding device that can carry out the quartastroke engine of sufficient lubricating oil supply with few part count to the integral body of Valve Drive System.

In order to realize above-mentioned purpose of the present invention, the present invention is in the quartastroke engine that cylinder is carried with big forward lean on vehicle, with the upper side wall of the same big valve mechanism cover that leans forward of above-mentioned cylinder on form the oil passage of the lubricant oil channeling conduct that lubricating pump is supplied with, the downstream-end opening of this oil passage is formed on the inside of the upper side wall of valve mechanism cover, towards the Valve Drive System of the upside of internal-combustion engine, thereby constituted the oil feeding device of quartastroke engine.

Because cylinder has significantly and leans forward, the Valve Drive System of quartastroke engine is positioned at upper-lower position, owing to be formed with towards the downstream-end opening of the oil passage of the Valve Drive System of this upside, at first supply to the upside valve driving system from the lubricant oil of this opening ejection, flow downwards then, arrive the downside Valve Drive System, thus can be finally to the whole sufficient lubricating oil of supplying with of Valve Drive System.

In addition,, thereby do not need independent lubricant oil pipe arrangement etc., thereby component number is reduced, installation exercise is simplified owing to oil passage is formed on the upper side wall of valve mechanism cover.

In addition, in the above-mentioned quartastroke engine, head gasket also is installed on cylinder head, be connected with above-mentioned valve mechanism cover, the oil passage that is formed on the cylinder head is connected with the oil passage of above-mentioned valve mechanism cover by the oilhole that forms on above-mentioned head gasket, and the aperture of the oilhole of above-mentioned head gasket makes littler than the internal diameter of above-mentioned two oil passages.

From the oil passage of this cylinder head one side when the oil passage of valve mechanism cover one side flows into lubricant oil, can be by the oilhole of head gasket minor diameter, because the nozzle act of this oilhole, make flow velocity increase, increased from the situation of downstream-end opening, thereby can further improve lubricity to Valve Drive System jet lubrication oil.

Fig. 1 is the side view of the scooter type motor cycle integral body of one embodiment of the present of invention.

Fig. 2 is the sectional view of the internal-combustion engine of this scooter type motor cycle along II-II line among Fig. 1.

Fig. 3 is the sectional view along III-III line among Fig. 2.

Fig. 4 is the sectional view along IV-IV line among Fig. 3.

Fig. 5 takes off the AC generator of this internal-combustion engine and the right side view of substrate.

Fig. 6 is the sectional view along VI-VI line among Fig. 5.

Fig. 7 is the sectional view along VII-VII line among Fig. 5.

Fig. 8 be among Fig. 3 cylinder body along the view of arrow VIII.

Fig. 9 is the plan view of the cylinder head cut open along IX-IX line among Fig. 3.

Figure 10 is the worm's eye view of the valve mechanism cover cut open along X-X line among Fig. 3.

Figure 11 is the right side view of the omission AC generator of quartastroke engine in the past.

Below, describe with reference to Fig. 1-10 for one embodiment of the present of invention.

Fig. 1 is the side view with scooter type motor cycle of component oscillating internal-combustion engine of the present invention.

3 couple together by low base plate 4 behind Vehicular body front 2 and the car body, form car body bone vehicle body frame roughly by under manage 6 be responsible for 7 and constitute.

Promptly, managing 6 steering heads 5 from Vehicular body front 2 down extends downwards, this time pipe 6 is in the bending of lower end edge substantially horizontal, make the lower direction rear extension of base plate 4, connect pairing left and right in its back-end and be responsible for 7, be responsible for 7 and recede from this connection part and to rise to certain height, horizontal curvature rearward extends then.

This person in charge 7 is supporting fuel tank and storage tank etc., disposes seat 8 above it.

On the other hand, above Vehicular body front 2, be provided with handle 11, be supported on the steering head 5 by axle, below stretch out front fork 12, supporting front-wheel 13 in its lower end by axle.

The lower end of the person in charge 7 rising part is outstanding to be provided with carriage 15, and wobble component 17 is being supported in the freely swung ground connection by connected element 16 on this carriage 15.

In wobble component 17, single cylinder quartastroke engine 30 is roughly being carried near the big forward lean of level with cylinder body 32 in its front portion, the forwards outstanding suspension carriage 18 in lower end from the part suitable with the crankcase of this assembly swing case 31 is connected its end on the above-mentioned connected element 16 by bearing pin 19.

Be formed with the inorganic variable-speed motor 35 of belt type to the rear from this internal-combustion engine 30, on the reducing gear 38 that is arranged at its rear portion, supporting trailing wheel 31 by axle.

Between the upper end of this reducing gear 38 and the above-mentioned person in charge's 7 upper bend part, rear shock absorber 22 is installed.

The air-strainer 25 that disposes Carburetor 24 on the top of wobble component 17 and be connected with this Carburetor 24,24 in described Carburetor is connected from the outward extending suction port 23 in internal-combustion engine 30 cylinder head 33 tops together.

Supporting master bracket 26 with axle on the outstanding suspension carriage 18 that is provided with in bottom of opposite side assembly swing case 31, fixing the root of start arm 28 from the outstanding starter axles 27 of the transmission-case cover 36 of the inorganic variable-speed motor 35 of belt type, the front end of this start arm 28 is provided with and starts pedal 29.

Vehicular body front 2 is covered from fore-and-aft direction by protecgulum 9a and bonnet 9b, and is covered from the left and right side direction by preceding lower cover 9c, and the central part of handle 11 is then covered by handle cover 9d.

Base plate 4 is covered by side cover 9e, and in addition, rear vehicle 3 is crossed bottom 10a and afterbody side cover 10b covering from the left and right side square tube.

Fig. 2 blocks wobble component 17 sectional view of cutting open along the II-II line among Fig. 1.

Assembly swing case 31 is to be made of left module case 31L that divides right and left and right module case 31R zoarium, right module case 31R forms crankcase portion half, and left module case 31L then is made of front and back size long front crankshaft case 31a, central transmission case 31b, rear portion deceleration cabinet 31c.

The left side open surface of this left side module case 31L is covered by transmission-case cover 36, and inside contains belt type adjustable speed drive 35, and the right side open surface of rear reduction gear crate part 31c is covered by deceleration cabinet 37, and inside contains reducing gear 38.

In the so-called crankcase of 31a of crankcase portion and right module case 31R, can bent axle 40 be supported on the left and right sides main bearing 40,41 with rotating freely, the right extension part of the part of extending along the left and right horizontal direction is provided with AC generator 60, and left extension is provided with the driving wheel 76 of cam chain driving sprocket wheel 55 and the inorganic variable-speed motor 35 of belt type.

Internal-combustion engine 30 by connecting rod 43 will be in the cylinder sleeve 44 of cylinder body 32 the crankpin 40a of piston 42 and bent axle 40 of back and forth movement couple together.

This quartastroke engine 30 has adopted OHC type valve system, in valve mechanism cover 34, be provided with valve driving mechanism 50, cam chain 51 to these valve driving mechanism 50 transmission of drive force is erected between camshaft 53 and the bent axle 40, like this, the form that is connected with the 31a of crankcase portion, cylinder body 32, cylinder cap 33 just is arranged in cam chain chamber 52.

That is, the left end setting-in of the camshaft 53 that is oriented to the left and right horizontal direction by movable sprocket 54 and be inlaid in the cam chain 51 that passes the inside of cam chain chamber 52 between the above-mentioned driving sprocket wheel 55 on the bent axle 40.

Embedding on cylinder head 33 has from the cam chain chamber 52 opposite sides (right side) towards the spark plug 45 of firing chamber.

As shown in Figure 3, valve driving mechanism 50 in the valve mechanism cover 34 is owing to approach big the leaning forward of level at cylinder, thereby, upper-lower position at camshaft 53 disposes suction valve 56 and outlet valve 57, the pivot that can freely swing respectively on pitman arm shaft 58,58 up and down is equipped with Rocker arm 59,59, cam rotation by camshaft 53 makes Rocker arm 59,59 swings, thereby carries out the suction valve 56 of predetermined instant and the on-off action of outlet valve 57.

The AC generator 60 that is provided with on the right flank of right module case 31R, by the ACG back-up ring 61 from the end of the outstanding bent axle 30 that is provided with of the right module case 31R cylindrical part 31d of central authorities, fixing bowl-shape external rotor 62, the inboard of the magnet 63 that along the circumferential direction is provided with on the side face within it, 64 of stators that are wound with stator coil 65 are fixed on the central cylindrical part 31d.

Forced air-cooling fan 66 is installed on the right flank of external rotor 62, and its side is covered by fan guard 67, and, be provided with fan shroud 68 to cover the cylinder body 32 and cylinder cap 33 form on every side that are connected with fan guard 67.

On the other hand, in the 31a of crankcase portion of assembly swing case 31, just in time separate crankshaft room by main bearing 41, form above-mentioned cam chain chamber 52, the left side wall of this cam chain chamber 52 then is a partition wall 71 of separating belt type adjustable speed drive chamber 70 with the cam chain chamber 52 of its left.On this partition wall 71, be formed with the flat circular through hole 71a cylindraceous of major diameter that bent axle 40 connects.In this through hole 71a, be pressed into circular sealed member 72, bent axle 40 passed the hollow portion of this circular sealed member 72.

Be embedded with above-mentioned driving sprocket wheel 55 on the bent axle 40 between sealing parts 72 and the main bearing 41, volume hangs with above-mentioned cam chain 51 on this driving sprocket wheel 55, by sealed member 72 belt type adjustable speed drive chamber 70 and cam chain chamber 52 watertights is separated.Thereby, prevented that lubricant oil from bleeding in the belt type adjustable speed drive chamber 70.

On the bent axle 40 that extends out passing sealed member 72, can be provided with drive pulley 76 therewith rotatably.

Drive pulley 76 is made of half belt pulley of fixed side 77 and movable half belt pulley of side 78, fixed side belt pulley 77 is fixed on the left part of bent axle 40 by back-up ring 79, be entrenched on the bent axle 40 by spline 78 of half belt pulleys of movable side on its right side, this movable side half belt pulley 78 is with bent axle 40 rotations, and can slide along axial direction, approaching, leave half skin of fixed side wheel 77.Volume is hung clamping and V-shape belt 75 between two half belt pulley 77,78.

The right side of movable half belt pulley of side 78, be provided with cam disk 80 near the fixed position of above-mentioned circular sealed member 72, be arranged on the slide key spare 80a of its outer circumference end and cooperating that the cam disk slide protrusion 78a of portion formation on the outer circumference end that is formed at half belt pulley of movable side 78 along axial direction can be free to slide.

The side of cam disk 80 1 sides of movable half belt pulley of side 78 forms taper towards cam disk 80 1 sides.Accommodate the gravity roller 81 that is clipped on this cam disk 80 in this conical surface inboard.

Like this, when the rotational speed of bent axle 40 increases, the gravity roller 81 that also rotates between cam disk 80 at movable side half belt pulley 78 moves to the direction away from the center of circle because of centrifugal force, movable half belt pulley of side 78 moves to left under the pushing of this gravity roller 81, near half belt pulley of fixed side 77, constitute like this and make the V-shaped belt pulley 75 that is clipped between two half skin wheel wheel 77,78 to moving, thereby make winding radius become big away from center of circle direction.

Setting-in half belt pulley of fixed side 87 on the inner sleeve 89 that the speed reducer input shaft 92 with respect to reducing gear 38 can support with rotating freely, on can being supported on outer sleeve 90 on the inner sleeve 89 along axial direction with being free to slide, the left side of half belt pulley of this fixed side 87 is embedded with half belt pulley of movable side 88, like this, corresponding with described drive pulley 76 rear negative pulley wheel 86 is made of two half belt pulleys 87,88.

Above-mentioned V-shape belt 75 in clamping on two half belt pulley 87,88.

Left side at speed reducer input shaft 92 and inner sleeve 89 is provided with centrifugal clutch 91, be delivered to power on the inner sleeve 89 by V-shape belt 75, when its rotational speed increases, make centrifugal clutch 91 combinations, thereby with transmission of power to speed reducer input shaft 92.

Reducing gear 38 will be delivered to power on the speed reducer input shaft 92 by jack shaft 93 and slow down by gear meshing and be delivered on the output shaft 94.Output shaft 94 is axletrees of trailing wheel 21, makes trailing wheel 21 rotations.

The hub portion of trailing wheel 21 is provided with drum-type brake 95, be embedded with the drum brakes arm 97 that links to each other with brake cable on the drum-type brake axle 96, the pulling brake cable, drum brakes arm 97 will be swung, drum-type brake axle 96 is rotated, thereby make drum-type brake 95 actions.

Cover the transmission-case cover 36 of belt type stepless variable-speed motor 70 from the left side, cover the centrifugal clutch 91 at rear from the drive pulley 76 in the place ahead always, forward position connects to be supported with free to rotately and starts axle 27 at the middle part, driving spiral gear 100 at this inner end setting-in that starts axle 27.Exert pressure by return spring 101.

Like this, front interior at transmission case cover 36, rotatable and supporting the sliding axle 102 coaxial slidably with bent axle 40 along axial direction, the passive spiral gear 103 that forms on this sliding axle 102 is meshed with above-mentioned driving spiral gear 100, simultaneously, fixing ratchet 104 at right-hand member, their integral body is exerted pressure to left by friction spring 105.

On the other hand, be formed with and ratchet 105 corresponding ratchet 79a on the back-up ring 79 of a side of bent axle 40, both can engage, separate by the slip of sliding axle 102.

Like this.Step on and start pedal 29, by start arm 28 startup axle 27 elastic force that overcome return spring 101 are rotated, just can rotate with startup axle 27 driving spiral gears 100 that are one, make the passive spiral gear 103 that is engaged with sliding axle 102 rotations, overcome simultaneously friction spring 105 elastic force and to right-hand slip, ratchet 104 is meshed with the ratchet 79a of back-up ring 79, thereby makes bent axle 40 force revolution, so just internal-combustion engine 30 can be started.

On the other hand, this internal-combustion engine disposes starting electrical machinery 110 above the 31a of crankcase portion of left module case 31L, starting electrical machinery 110 as shown in Figure 4, the magnet 111 internal rotor coil 112 on every side that is trapped among external stator is wrapped on the small gear 113, this small gear 113 is outstanding to the left, at the end of small gear 113 formative gear 113a.

Like this, be clamped in and fly into gear mechanism 115 between 31a of crankcase portion and the transmission case cover 36, its axle points to the left and right horizontal direction, be arranged between starting electrical machinery 110 and the drive pulley 76, on flying into the input gear 116 on gear mechanism 115 right sides, this is meshing the small gear 113a of starting electrical machinery 110, on the other hand, during the flying into gear 117 and fly out to the left of its left side, be meshed with starter receiver 77a on being formed at half belt pulley of fixed side, 77 outer periphery.

Like this, when starting electrical machinery 110 drives, the rotation of small gear 113 is passed on the input gear 116 that flies into gear mechanism 115, flying into gear 117 flies out to left, be engaged on the starter receiver 77a of half belt pulley of fixed side 77, make fixed side half belt pulley 77 with bent axle 40 rotations, thereby can make internal-combustion engine 30 begin to start.

In addition,, fly into 117 of gears and return, thereby untie engagement with starter receiver 77a if starting electrical machinery 110 stops.

Form half skin wheel 77 of fixed side that acceptance flies into the starter receiver 77a of gear 117 engagements, on the side of the opposite side of this V-shape belt 75 of clamping (left surface), by the rubber sintering being attached with the cooling fan 118 of rubber system, cool off belt type adjustable speed drive 35 by the rotation of cooling fan 118.

With reference to Fig. 1 and Fig. 2, the outstanding gas-entered passageway 36a that is formed with tubular in front portion on transmission case cover 36, vertically be formed with tubular exhaust passage 36b in fore-and-aft direction substantial middle position along what tilt along sidewall, the rear end that is connecting corrugated flexible hose 14 on the above-mentioned gas-entered passageway 36a, this corrugated flexible hose 14 forwards extends, and its front end is connected from managing down on the outstanding outlet pipe 6b that forms of 6 crooked positions.

Near the following height and position place of the steering head 5 of pipe 6, the outstanding suction tude 6a that is formed with, suction tude 6a and outlet pipe 6b are connected by managing 6 inside down.

Like this, in belt type adjustable speed drive chamber 70, rotation by bent axle 40 makes cooling fan 118 rotations, at this moment, suck air from managing 6 suction tude 6a down, by under manage 6 inside and enter the corrugated flexible hose 14 from outlet pipe 6b, be drawn in the belt type adjustable speed drive chamber 70 from intake duct 36a again by corrugated flexible hose 14, belt type adjustable speed drive 35 is cooled off, be discharged to the outside from air outlet flue 36b again.

Like this, with the right module case 31R as crankcase of the opposite side of the left module case 31L that constitutes belt type adjustable speed drive chamber 70 in, be formed with the central cylindrical part 31d that is through with bent axle 40 as described above highlightedly to right-hand, thereunder the front portion of slight inclination is formed with circular open 130 along central cylindrical portions may 31d, this circular open 130 is by circular substrate 131 sealings as cover, and lubricating pump 140 is equipped with in portion within it.

Fig. 5 is a right, side view of having removed the AC generator 60 and the substrate 131 of this internal-combustion engine 30.

Right module case 31R has two openings of above-mentioned central cylindrical part 31d and circular open 130 on sidewall, be formed with highlightedly 40 concentric with bent axle, promptly have the bigger cylindric flange 132 of external rotor 62 external diameters of the above-mentioned AC generator 60 of ratio in identical axle center with central cylindrical portions may 31d, like this, be provided with periphery wall 133 in its outside along circumference.

The below part of cylindric flange 132 is lacked because of above-mentioned circular open 130, and periphery wall 133 bloats downwards because of above-mentioned circular open 130.

Like this, circular open 130 is adjacent not contain as mode and the cylindrical part 31d of these central authorities of the central cylindrical part 11d of bent axle 40 through holes, the radius of its external diameter and periphery wall 133 about equally, the lubricating pump 140 that reaches dress in covering with its near degree.

The circular substrate 131 that seals this circular open 130 embeds in the circular open shown in Figure 6 130 by seal ring 134, attachment face 130a on the circumference of flange part 131a and circular open 130 contacts, and fixes by bolt 135 at forward and backward screw portion 130b place.

The outside of substrate 131 is extended with installation base 131b, is fixing pulse oscillator 137 on this installation base 131b.

Pulse oscillator 137 is to induce the coil type detecting sensor, and it is relative with the outer circumferential face of the external rotor 62 of AC generator 60 and be provided with highlightedly to right-hand, detects the magnetic resistance 138 that is arranged on the external rotor 62, thereby obtains the information of crank position and rotation rotating speed.

Shown in double dot dash line among Fig. 5, pulse oscillator 137 outstanding being arranged on because of circular open 130 makes on the position of cylindric flange 132 shortcomings are put in order and can be replenished mutually with the shortcoming part of cylindric flange 132, form wall.

Like this, the rotation of the strong air-cooling fan 66 that the right flank of the external rotor 62 by AC generator 60 is set and from the central inhaled air of fan guard 67, the essentially no guiding has the central authorities of cylindric flange 132 and pulse oscillator 137 with leaking, then, import cylinder body 32 1 sides of internal-combustion engine 30 by fan shroud 68, thereby can improve cooling effectiveness.

Central authorities at substrate 131 internal surfaces of opposite side have projection 131c cylindraceous, the driven gear 141 of the lubricating pump 140 that pushing is inner.

Driven gear 141 is inlaid on the oil pump shaft 142, and the actuation gear 143 that is inlaid on the opposite side bent axle 40 along main bearing 41 is meshed with driven gear 141, the rotation of bent axle 40 is delivered on the oil pump shaft 142, thereby drives lubricating pump 140.

As shown in Figure 6, lodge in the lubricant oil of the 31a of crankcase portion bottom, through lubricating oil filter 147, module case 31R moves to the right by the oil passage t1 of level, pass through the oil passage t2 of approximate vertical again, suction port 140a by lubricating pump 140 sucks, and discharges from exhaust port 140b again, supplies in the device of each lubrication system.

As Fig. 3 and shown in Figure 7, the lubricant oil of being discharged by exhaust port 140b passes through oil passage t3, through the oil passage t4 between right module case 31R and the left module case 31L, again by oil passage t5, along flowing towards the module case 31L of the cylinder body 32 that leans forward significantly that is similar to level, the formed oil passage t6 of junction plane 32a (with reference to Fig. 8) lower right side between the 31R towards the right substantially horizontal of right module case 31R.

As shown in Figure 8, from the lubricant oil of oil passage t6 the circuitous upward oil passage t7 of cylinder-bore by on the module case 31L of cylinder body 32, junction plane 32 between the 31R, forming, enter among oil passage t8 cylinder-bore right upper portion opening, that connect abreast with the cylinder-bore axial direction of cylinder body 32, then shown in double dot dash line among Fig. 3, by the oil passage t9 that prolongs from the oil passage t8 of cylinder head 33, thereby enter in cylinder body 32 and the cylinder cap 33, flow to valve mechanism cover 34.

With reference to Fig. 3, oil passage t9 is divided into oil passage t10 and two branches of oil passage t11 halfway again, the oil passage of the oil passage t10 of one side by being communicated with valve mechanism cover 34, towards the pitman arm shaft 58 of upside, opposite side oil passage t11 then extends obliquely upward.

In addition, on downside pitman arm shaft 58, also be formed with other oil passage t20.

Like this, owing to be formed with oil passage t8, t9, t10, t11, t20, thereby just do not need to be provided with again in addition lubricant oil pipe arrangement with its split on the sidewall of cylinder body 32, cylinder cap 33, thereby make part count reduce, simplified installation exercise.

Above-mentioned towards the oil passage t11 of oblique upper such as the plan view of cylinder cap 33, promptly shown in Figure 9, form opening 33b at upper right quarter with the junction plane 33a of the valve mechanism cover 34 of cylinder cap 33.

Liner 150 in clamping on the junction plane of cylinder cap 33 and valve mechanism cover 34, liner 150 with the opening 33b corresponding part of above-mentioned lubricant oil by road t11 on be formed with ratio open 33b diameter and want little oilhole 150a.

After leading to this oilhole 150a, worm's eye view with reference to valve mechanism cover 34 and packing ring 150, be Figure 10, on valve mechanism cover 34 1 side junction planes, be formed with ditch, enter and be arranged in Figure 10 and be hidden in the end 34a of packing ring 150 by the oil passage t12 upper right quarter shown in the dotted line, move to left along the top of the junction plane of valve mechanism cover 34 by oil passage t12, turn round in substantial middle position, the left and right sides, enter and allow among the oil passage t13 that the last side arm 34b of valve mechanism cover 34 extends along the cylinder-bore axis direction.

As shown in Figure 3, the last side arm 34 wall 34b of the valve mechanism cover 34 that oil passage t13 leans forward along the big tilt angle that roughly becomes level are to roughly the place ahead extension, oil passage t13 extends on the junction plane of valve mechanism cover 34 and the internal surface roof 34c substantial middle position of the ventilation chamber 34d that is separated by many flanges and form, its front end is crooked downwards, the oil passage t14 short with size is communicated with, and this oil passage t14 has opening 34e on the internal surface of last side arm 34b.

This lubricant openings 34e is positioned at the position near the valve pocket end 56a top of last side valve 56.

As above-mentioned formed oil passage, the lubricant oil that oil passage t11 by cylinder head 33 transports is by the oilhole 150a of packing ring 150, this oilhole 150a is owing to be littler than the diameter of the end 34a of the lubrication passages t12 of the opening 33b of oil passage t11 and valve mechanism cover 34 1 sides, form aperture, thereby lubricant oil is when this oilhole 150a, flow velocity can increase, thereby enter among the oil passage t12 of valve mechanism cover 34 1 sides, then by oil passage t13, among the t14, from the lubricant openings 34e that valve mechanism cover 34 upper side wall 34b internal surfaces form, vomit, on the edge of the valve pocket end of suction valve 56 56a, disperse.

Like this, have in the OHC type quartastroke engine 30 that large inclined angle leans forward at cylinder, because upside Valve Drive System at this lubricant oil undersupply, promptly in suction valve 56 valve sleeve end 56a from above disperse ground supplying lubricating oil, thereby can obtain sufficient lubricating oil and supply with, this lubricant oil and then fall downwards flows to the Valve Drive System of camshaft 53 and downside, be on the outlet valve 57, thus can be to the whole supplying lubricating oil of Valve Drive System.

Owing to having significantly, cylinder leans forward in the present invention, the Valve Drive System of quartastroke engine is under the situation of upper-lower position, because be formed with downstream-end opening towards the oil passage of the Valve Drive System of this upside, at first supply to the upside Valve Drive System from the lubricant oil of this opening ejection, flow downwards then, arrive the downside Valve Drive System, thereby can finally make Valve Drive System integral body have sufficient lubricating oil to supply with.

In addition, oil passage is owing to be formed on the upper side wall of valve mechanism cover thereby do not need with the lubricant oil pipe arrangement of its split etc., thereby part count is reduced, and installation exercise is simplified.

Be formed at the oil passage on the cylinder head, be connected with the oil passage of above-mentioned valve mechanism cover by the oilhole that forms on the head gasket, allow the aperture of oilhole of above-mentioned head gasket make littler than the internal diameter of above-mentioned two oil passages, thereby jet-action by this oilhole, make flow velocity increase, having increased from downstream-end opening is the situation of jet lubrication oil to valve driving, thereby can further improve lubricity.

Claims (2)

1, a kind of oil feeding device of quartastroke engine, it is characterized in that: in the quartastroke engine that cylinder is carried with big forward lean on vehicle, on the upper side wall of the valve mechanism cover that equally greatly leans forward with above-mentioned cylinder, form the oil passage of the lubricant oil channeling conduct that will supply with from lubricating pump, on the inside of the upper side wall of valve mechanism cover, towards the Valve Drive System of the upside of internal-combustion engine, form the downstream-end opening of this oil passage.

2, the oil feeding device of quartastroke engine as claimed in claim 1, it is characterized in that: in the above-mentioned quartastroke engine, head gasket also is installed on cylinder head, be connected with above-mentioned valve mechanism cover, the oil passage that is formed on the cylinder head is connected with the oil passage of above-mentioned valve mechanism cover by the oilhole that forms on the above-mentioned head gasket, and the aperture of the oilhole of above-mentioned head gasket makes littler than the internal diameter of above-mentioned two oil passages.

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