CN100523443C - Air leakage access structure of internal combustion engine - Google Patents
Air leakage access structure of internal combustion engine Download PDFInfo
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- CN100523443C CN100523443C CNB2006101101433A CN200610110143A CN100523443C CN 100523443 C CN100523443 C CN 100523443C CN B2006101101433 A CNB2006101101433 A CN B2006101101433A CN 200610110143 A CN200610110143 A CN 200610110143A CN 100523443 C CN100523443 C CN 100523443C
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- combustion engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
- F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
- F01M13/022—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure using engine inlet suction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
- F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
- F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
Abstract
To provide blow-by gas passage structure for an internal combustion engine, constituting a blow-by gas reducing device without complication of the device, and preventing enlargement of an engine. The blow-by gas passage structure for an internal combustion engine, comprises: a housing having a crankcase 14; an intake device introducing air into a combustion chamber; the blow-by gas reducing device 90 recirculating blow-by gas from an internal communication space 60 of the housing into the intake device; an auxiliary machine 44 attached to the housing to assist operation of the internal combustion engine. The blow-by gas reducing device 90 has a fresh air supply pipe 92 for guiding the air from the intake device to the internal communication space 60 of the housing, the auxiliary machine 44 has a communication passage 44f communicating with the internal communication space 60 from the outside of the housing, and the fresh air supply pipe 92 is connected with the communication passage 44f.
Description
Technical field
The present invention relates to the air leakage access structure of internal-combustion engine, it has makes blow-by gas recirculation to the interior leakage restoring device of suction means.
Background technique
In being equipped on the internal-combustion engine of cart etc., be trapped in crankshaft room's (and communicating space) if leak into the gas leakage of crankshaft room from the firing chamber, then the deterioration by dilution such as gasolene ingredient in the gas (HC) or moisture and in advance of the lubricant oil in the crankcase.For this reason, in existing internal-combustion engine, have and be used for supplying with the leakage restoring device that combustion disposal is carried out in the firing chamber once more to the suction side gas leakage that refluxes.As this leakage restoring device, for example, the known mode (for example, with reference to patent documentation 1) that has the outlet end that will be used to guide the blow-by gas recirculation path of gas leakage to be communicated with the space, downstream side (clean side) of air cleaner.
[patent documentation 1] real opening put down 2-No. 34710 communiques
Yet in small-sized carts such as scooter-type vehicle, the position at general seat is lower than other cart and constitutes, and, need guarantee the containing space of safety helmet etc. in the bottom at seat.In addition, internal-combustion engine (power unit) is located at the bottom of this containing space and drives trailing wheel and constitute, and therefore preferred internal-combustion engine is avoided the maximization towards above-below direction.
In the past, seepage (bleeding) pipe arrangement was connected on joint (joint) path of the special use that is installed on crankcase or cylinder head etc., and was installed in and starts pusher side.Therefore, for leakage restoring device is set, produce the problem that the part number increases or cause structure complicated, or the maximize problem of maximization of the reduction that causes space efficiency or finished car of internal-combustion engine.In addition, leakage restoring device utilizes backflow that the pulsation of crankshaft room leaks gas etc.Therefore, be created in the position connecting pipings that the influence of the interior pressure change of this crankshaft room is tried one's best big, improve the problem of reduction efficiency.
Summary of the invention
In view of above-mentioned problem, the object of the invention is to provide and can make leakage restoring device complicated and constitute and can avoid the air leakage access structure of internal-combustion engine of the maximization of motor.
In order to achieve the above object, the air leakage access structure of internal-combustion engine of the present invention has: shell, and it has crankcase and forms, and inside is formed with the internal communication space that is communicated with the crankshaft room of the inside that is formed on crankcase; Leakage restoring device, it makes blow-by gas recirculation in the internal communication space of shell to suction means; And cam chain tension means, it is installed on the shell, the action of auxiliary internal-combustion engine, wherein, leakage restoring device has: new gas supplying tubing, it is used for forming on the cam chain tension means from the access in the external communications internal communication space of shell to the air of the internal communication space of shell guiding from suction means, connects new gas supplying tubing on this access.
In addition, preferably make above-mentioned cam chain tension means be located at the tension force of timing chain (timing chain) effect regulation of chain drive in the internal communication space of shell to formation, and as suppressing the lax chain tensioning device of timing chain.In addition, form on the preference chain tension device: the press part, it pushes timing chain; And tapped hole, it is at the locking component that inserts the push action of pinning the press part when shell is installed, after installation, replace locking component to insert obstruction component from the outside, new gas supplying tubing is installed on the chain tensioning device, and be connected on the joint of the engagement member that is formed with the joint that is communicated with access, engagement member is fixed on the chain tensioning device via obstruction component.In addition, preferably constitute: with timing chain in the internal communication space, be configured in crankshaft room near, make the air of the gas supplying tubing of making a fresh start be subjected to the internal communication space of the interior pressure change guiding shell of crankshaft room.
Air leakage access structure according to the internal-combustion engine of the present invention of this spline structure, be formed with on the cam chain tension means from the access in the internal communication space of external communications shell, on this access, be connected with new gas supplying tubing from the internal communication space of the air guide shell of suction means.So,, improve the efficient of discharging gas leakage from shell side owing to be directed to shell from the air of suction means.In addition, with as the existing mode that special-purpose installation component is set on the cylinder head float chamber compare, can realize the miniaturization of mounting construction, and can realize the minimizing of the part number of leakage restoring device.
In addition, when on chain tensioning device, the engagement member that connects new gas supplying tubing being installed, via the obstruction component of the tapped hole that inserts chain tensioning device, lock seaming member.So, always carry out as a ring of the assembling stroke of chain tensioning device obstruction component is inserted tapped hole the time, engagement member is installed simultaneously, can reduce part number and assembling procedure when thus new gas supplying tubing being connected shell side.
In addition, near crankshaft room, the air of the gas supplying tubing of making a fresh start is subjected to the interior pressure change of crankshaft room to timing chain in the internal communication spatial configuration, is directed to the internal communication space of shell.Thus, the position that connects new gas supplying tubing, become the structure that connects new gas supplying tubing in the space of the bigger effect of influence of the interior pressure change of crankshaft room, the delivery volume of the air of supplying with to inner communicating space increases thus, thereby can realize the raising of the scavenging efficiency in the shell.
Description of drawings
Fig. 1 is the left side view of the suitable scooter type cart of the air leakage access structure of internal-combustion engine of the present invention.
Fig. 2 is the schematic representation of representing motor, suction system, air cleaner, reaching the structure of leakage restoring device.
Fig. 3 is the sectional drawing of the above-mentioned motor of expression cam chain mechanism.
Fig. 4 is the plan view that arrow IV direction shown in Figure 1 is observed.
Fig. 5 is the plan view of the air cleaner of assembled state.
Fig. 6 is the side view of the air cleaner of assembled state.
Fig. 7 is the side view of the inboard of expression clean side halfbody.
Fig. 8 is the sectional drawing of representing U word rib, reaching the air cleaner of gas leakage guide space.
Fig. 9 is the sectional drawing of representing oval rib, reaching the air cleaner of new gas supplying tubing.
Figure 10 is the sectional drawing of representing air-breathing inlet, reaching the air cleaner of new gas supply outlet.
Figure 11 is the stereogram of expression control valve.
Figure 12 represents cam chain tension means, (a) is plan view, (b) is side view, (c) sectional drawing of representing for the arrow c-c along (a).
Figure 13 represents engagement member, (a) is plan view, (b) sectional drawing of representing for the arrow b-b along (a).
Among the figure: PU-power unit; 1-scooter type cart (vehicle); 10-motor; 14-crankcase; 19-firing chamber; 43-cam chain; 44-cam chain tension means; 45-cam chain chamber; 60-internal communication space; 80-air cleaner; 90-leakage restoring device; 91-blow-by gas recirculation path; 92-new gas supplying tubing; 95-bonding apparatus; 96-engagement member.
Embodiment
Below, with reference to accompanying drawing preferred implementation of the present invention is described.Be shown with the left side view of scooter type cart 1 of the air leakage access structure of the internal-combustion engine that possesses present embodiment among Fig. 1.This scooter type cart 1 is identical with general scooter type cart, comprising: front-wheel 3, and it is installed on the front fork 2; Steering handle 5, itself and front fork 2 link; Power unit PU, it can be installed in the rear portion for unit swing (unit swing) formula with swinging up and down; Trailing wheel 6, it is supported by power unit PU axle.
In addition, scooter type cart 1 extends towards oblique upper with respect to the rear in the rear view of vehicle setting, and overlooks the rear frame 7 of observing approximate U word shape and constitute, and power unit PU is installed, and it is positioned at the U word inboard and the below of this rear frame 7.Above rear frame 7, shown in two dot and dash line, seat mount 9 is installed, it is bearing in horizontally extending seat 8 on the fore-and-aft direction.Have again, on rear frame 7, cover the power unit PU that is positioned at the inboard, be provided with not shown cover by shapings such as resinous woods.Thus, can below seat 8 and between this cover, guarantee containing space.
Below, in conjunction with Fig. 2～Fig. 4 the power unit PU that is equipped on the scooter type cart 1 is described.The motor 10 of power unit PU is 4 circulating internal-combustion engines, by cylinder head cover 11, cylinder head 12, cylinder block 13, and crankcase 14 constitute.Have, this motor 10 as shown in Figure 2, is the horizontal cylinder type that is equipped with cylinder head 12 with forwards extending again, and in the explanation afterwards, as the top, the direction of arrow F describes as the place ahead with the direction of the arrow U among Fig. 1.
On cylinder block 13, embedding has columned cylinder sleeve, in the cylinder chamber 15 that forms around this cylinder sleeve, disposes the piston 16 that is free to slide in this cylinder chamber 15.Piston 16 is connected on the bent axle 18 of free rotary ground supporting in crankcase 14 via connecting rod 17.By this piston 16, cylinder head 12, cylinder sleeve around and be formed with firing chamber 19.In addition, stockpile the food tray 20 of lubricant oil in the shaping of the bottom of crankcase 14.
On cylinder head 12, be formed with suction port 21 and exhaust port 22.Suction port 21 extends in cylinder head 12 upward, and an end is communicated with firing chamber 19 by intakeport 23, and the other end is by the external communications of air-breathing connection mouth 24 with cylinder head 12.On the other hand, exhaust port 22 extends downwards in cylinder head 12, and an end is communicated with firing chamber 19 by intakeport 25, and the other end is by the external communications of exhaust connection mouth 26 with cylinder head 12.
In addition, cylinder head 12 has the Aspirating valves 27 and the outlet valve 28 of mushroom shaped, and these valve 27,28, one ends are installed on the valve shaft and are supported by retainer (retainer), the other end is by the valve spring by cylinder head 12 supporting, respectively to the direction application of force of closing intakeport 23 and intakeport 25 often.
In addition, on cylinder head 12, free rotary ground supporting is useful on the camshaft 31 that makes Aspirating valves 27 and outlet valve 28 on-off actions, by the rotation of cam chain mechanism 40 transmission bent axles 18.Cam chain mechanism 40 comprises: driving sprocket wheel 41, and it is by 18 supportings of bent axle; Driven sprocket 42, it is by 31 supportings of camshaft; And cam chain (timing chain) 43, it is erected between two sprocket wheels 41,42, with half rotational speed rotating cam axle 31 of bent axle 18.Cam chain 43 be configured in the inner space that is communicated with cylinder head 12 and crankcase 14 the inner space (below, become the 14a of crankshaft room) chain chamber 45 in, cam chain tension means 44 is installed on cylinder block 13, and it is used to prevent the lax of cam chain 43 to camshaft 31 transferring power the time.
On camshaft 31, be formed with the cam 32 that corresponds respectively to Aspirating valves 27 and outlet valve 28, lift rocking arm 33, depress each valve 27,28 thus, thereby open and close intakeport 23 and relief opening 25 respectively by this cam 32.
On the air-breathing connection mouth 24 inlet duct 51 is installed, and then vaporizer 52 is installed via this inlet duct 51.Sucking pipe 53 in the upstream of vaporizer 52 via free bend connects air cleaner 80.On inlet duct 51, in addition, be used for the fuel of vaporizer 52 is overflowed the control cab ventilation channel 52a that turns back to air cleaner 80, connect vaporizer 52 and air cleaner 80.So, constitute the suction means of motor 10 by inlet duct 51, vaporizer 52, sucking pipe 53 and air cleaner 80.
Power unit PU with this motor 10, supply with the mixed gas of firing chamber 19 by not shown spark plug burning, piston 16 is moved up and down, and rotation drives the bent axle 18 that links by connecting rod 17, makes the rotation speed change of bent axle 18 and passes to trailing wheel 6 by being housed in a speed change mechanism in the gearbox.In the course of action of this motor 10, contain the gasolene ingredient of not combustion of combuster 19 or the gas leakage of moisture etc. and leak to the 14a of crankshaft room between the inner peripheral surface of piston 16 and cylinder chamber 15.
Have, the 14a of crankshaft room is communicated with the inner space of cylinder head 12 via the cam chain chamber 45 that disposes cam chain 43 again, and the gas leakage that leaks into the 14a of crankshaft room also is trapped in the inner space of cam chain chamber 45 and cylinder head 12.Equally, follow piston 16 move up and down crankcase 14 in cut down output and change movingly, press in this change to inner space of the cam chain chamber 45 that is communicated with the 14a of crankshaft room, cylinder head 12 transmission.So, motor 10 by cylinder head cover 11, cylinder head 12, cylinder block 13, crankcase 14, and forms cam chain box (not shown) the formation shell of cam chain chamber 45, below, with the add up to internal communication space 60 that is called shell and describing of the 14a of crankshaft room and this communicating space (inner space of cam chain chamber 45, cylinder head 12).
Then, leakage restoring device 90 is described.As shown in Figure 2, leakage restoring device 90 has: blow-by gas recirculation path 91, and it is communicated with space, the downstream side 80b of internal communication space 60 and air cleaner 80; New gas supplying tubing 92, it is communicated with space, the downstream side 80b of internal communication space 60 and air cleaner 80 equally; Control valve 93, it is located on the new gas supplying tubing 92.Blow-by gas recirculation path 91 be for communicating space 60 internally to air cleaner 80 guiding gas leakage and be provided with, new gas supplying tubing 92 be for from air cleaner 80 to inner communicating space 60 guiding air and be provided with.
Blow-by gas recirculation path 91, entry end is located on the cylinder head cover 11 integratedly, embedding is to the outstanding columned joint 11a of foreign side, be communicated with the inner space of cylinder head cover 11, outlet end embeds the columned reflux side joint 82d that is located on the air cleaner 80, be communicated with space, the downstream side 80b of air cleaner 80, the fixed mechanism of regulations such as employing wire clamp is fixed.So, connect cylinder head cover 11 that is configured in the place ahead and the blow-by gas recirculation path 91 that is configured in the air cleaner 80 of left back, extend configuration at fore-and-aft direction, so that the left of motor 10 is along rear frame 7.In addition, in the inboard of cylinder head cover 11, form ventilation (breather) chamber 94 that is communicated with the inner space of cylinder head 12.The gas leakage that flows into this ventilation chamber 94 is by gas-liquid separation.
New gas supplying tubing 92 comprises: the first supply passage 92a, and it is positioned at the upstream side of control valve 93; The second supply passage 92b, it is positioned at the downstream side of control valve 93.The first supply passage 92a, entry end embeds the supply side joint 82e be located on the air cleaner 80 and is communicated with space, the downstream side 80b of air cleaner 80, outlet end embeds the upstream side joint 93d of control valve 93, and adopts the fixed mechanism of regulation such as wire clamp to fix respectively.The second supply passage 92b, entry end embeds the downstream side joint 93e of control valve 93, outlet end embeds the joint 96d be fixed on the bonding apparatus of installing on the cam chain tension means 44 95, and is communicated with cam chain chamber 45, and adopts the fixed mechanism of regulation such as wire clamp to fix respectively.
So in the leakage restoring device 90 of present embodiment, control valve 93 is located at the vehicle right back, guarantees vaporizer 52 is configured in the space of the top of motor 10 thus.On the other hand, the second supply passage 92b, outlet end is connected on the joint 96d of the bonding apparatus 95 that is installed on the cylinder block 13, bonding apparatus 95 is configured in not the position that overlaps up and down with vaporizer 52, as shown in Figure 4, overlook observation, the second supply passage 92b is right-hand vaporizer 52, extends upward and is connected on the bonding apparatus 95 in front and back.
The leakage restoring device 90 of Gou Chenging like this, if piston 16 moves down in cylinder chamber 15, the interior pressure of space, the downstream side 80b of firing chamber 19 and air cleaner 80 becomes negative pressure (the interior pressure of crankcase communicating space becomes malleation), then be trapped in gas leakage in the crankcase communicating space 60 in ventilation chamber 94 by gas-liquid separation, and import blow-by gas recirculation path 91, thereby be back among space, the downstream side 80b of air cleaner 80 from the joint 11a of cylinder head cover 11.At this moment, leaf valve 93a closes valve, and the gas leakage that flows into the second supply passage 92b can not be imported into the first supply passage 92a and adverse current.
In addition, the interior pressure of crankcase communicating space 60 becomes negative pressure if piston 16 moves up, then leaf valve 93a leaves valve, the air of space, the downstream side 80b of air cleaner 80 is imported into the first supply passage 92a, and import the second supply passage 92b with flow corresponding to the aperture of solenoid valve 93b, supply with cam chain chamber 45.Supply with the new gas of cam chain chamber 45, impel the discharge of gas leakage, improve the seepage efficient in internal communication space 60 thus.
Below, with reference to Fig. 5～Figure 10 the structure of air cleaner 80 is described.Air cleaner 80, as the configurating filtered element 83 of inner space 80A of the above-mentioned purifier case 85 that is shaped by contaminated side halfbody 81 and clean side halfbody 82 and constituting.
As Fig. 5, shown in Figure 6, if engaging rib 81b, 82b by contaminated side halfbody 81 and clean side halfbody 82 engage filter house 83a, the cushion part 83b of filter element 83 and assemble contaminated side halfbody 81 and clean side halfbody 82, case inner space 80A then, by the engaging rib 81b and the filter element 83 of contaminated side halfbody 81, be divided into the upstream side space 80a of air-breathing inlet 81a opening and space, the downstream side 80b of air-breathing outlet 82a opening.
In addition, as shown in Figure 7, on clean side halfbody 82, form the reflux side joint 82d of outlet end of connection blow-by gas recirculation path 91 of cylindric (tubulose) of both ends open and the supply side joint 82e of the entry end that is connected new gas supplying tubing 92 of cylindric (tubulose) that form both ends open integratedly, and on clean side halfbody 82, be formed with the gas leakage inlet 82g of reflux side joint 82d, and be formed with the new gas supply outlet 82h of supply side joint 82e.In addition, the joint 82f that is used to install from the control cab ventilation channel 52a of vaporizer 52 is located at the close position with supply side joint 82e.
As shown in Figure 7, the opening of reflux side joint 82d promptly is located at the gas leakage inlet 82g on the clean side halfbody 82, is positioned at the rising wood of clean side halfbody 82, and, be provided with near air-breathing outlet 82a.In addition, near gas leakage inlet 82g, be provided with from the inwall side of clean side halfbody 82 and observe the outstanding U word rib 82j of approximate U word shape, surrounded by the upper limb inwall of U word rib 82j and clean side halfbody 82 around this gas leakage inlet 82g.In addition, be provided with notch part 82k at the front end of U word rib 82j, notch part 82k is to towards direction (left among Fig. 7) skew of air-breathing outlet 82a and form.As shown in Figure 8, U word rib 82j is under the assembled state of air cleaner 80, front end to extend near the mode of the inwall of contaminated side halfbody 81 and to be provided with, forms the gas leakage guide space 80c of the gas leakage inlet 82g opening of reflux side joint 82d in the 80b of space, downstream side in the 80b of space, downstream side.
In addition, supply side joint 82e, as shown in Figure 6, the side that is located at assembled state is observed down, the position that overlaps with filter element 83, new gas outlet 82h is relative with filter element 83.In addition, being shaped integratedly with clean side halfbody 82 is provided with the outstanding oval rib 821 of sub-elliptical shape, its inwall from clean side halfbody 82 surround new gas outlet 82h around.This ellipse rib 821 as Fig. 9, shown in Figure 10, under the assembled state of air cleaner 80, extends towards the filter house 83a of filter element 83, forms the new gas guide space 80d of roughly cutting apart from space, downstream side 80b.
Owing to constitute air cleaner 80 like this, therefore be directed to the gas leakage of space, downstream side 80b from blow-by gas recirculation path 91, the guiding of guide space 80c of being subjected to leaking gas does not flow towards filter element 83, and be directed to air-breathing outlet 82a, so can avoid the stained of filter element 83, thereby can prolong the wear life of filter element 83.In addition, the air that has passed through new gas guide space 80d is directed to the first supply passage 92a, flows into filter element 83 sides even flow into the gas leakage of space, downstream side 80b, is subjected to the influence of oval rib 821, can not flow into the first supply passage 92a yet, thereby can prevent the reduction of seepage efficient.
Below, with reference to Figure 12, Figure 13 the bonding apparatus 95 that is connected with the second supply passage 92b is described.Bonding apparatus 95 is made of cam chain tension means 44 and engagement member 96.
As shown in figure 12, cam chain tension means 44 has and the conventional device identical construction, has: tension device housing department 44a, and it is formed with the fitting seat 44d that installs to cylinder block 13; Press part 44b, it is provided with from inside of tension device housing department 44a to foreign side is outstanding, with the contact element 44A butt that contact cam chain 43, and the pressing force of stipulating to this contact element 44A effect; Pressing force generating unit (not shown), the inside that it is housed in tension device housing department 44a is used for to press part 44b performance pressing force; Locking mechanism portion (not shown), it is equipped in the inside of tension device housing department 44a, stops the performance of the pressing force of pressing force generating unit; The central, threaded hole 44c of portion, it is used for inserting pinning sells (not shown), and this pinning pin is used to make the generation effect of locking mechanism portion.
The pressing force generating unit has spiral spring (pressure spring) and constitutes, and the ejection force that utilizes this spiral spring is to press part 44b performance pressing force.In the 44c of portion of central, threaded hole, be inserted with under the state that pins pin, stop the performance of the ejection force of spiral spring by the effect of locking mechanism portion.Have again, before being installed to cam chain tension means 44 on the cylinder block 13, in the 44c of portion of central, threaded hole, inserting in advance and pin pin, become the A-stage that press part 44b is positioned at tension device housing department 44a side.
In addition, in cam chain tension means 44, retaining thread hole 44e, 44e are set with central, threaded hole 44c adjacency, and, abut to form the access 44f that extends up and down in the inside of tension device housing department 44a with central, threaded hole 44c.This access 44f is by open upward columned accommodation section 44g and form diameter and constitute less than the columned passage portion 44h of accommodation section 44g.
Cam chain tension means 44 makes press part 44b be positioned at cam chain chamber 45, and makes fitting seat 44d and cylinder block 13 butts, via being inserted into being bolted on the cylinder block 13 in retaining thread hole 44e, the 44e.Thus, the accommodation section 44g of access 44f opens to the outside of cylinder block 13, and passage portion 44h opens to inner communicating space 60.And,, then in central tapped hole 44c, extract the pinning pin that inserts in advance if be fixed on the cylinder block 13.Thus, locking mechanism portion does not produce effect, spiral spring performance ejection force, and press part 44b and contact element 44A butt are via the tension force of contact element 44A to cam chain 43 effect regulations.In the past, if the installation of cam chain tension means 44 finishes, then pinned inserting bolt in the central, threaded hole 44c that sells, the inaccessible thus central, threaded hole 44c that opens to the outside to having extracted.The cam chain tension means 44 of An Zhuaning like this is configured in the position relative with cam chain 43.
As shown in figure 13, engagement member 96 has: baseplate part 96a, and it is formed with the installation seat surface 96e that installs to cam chain tension means 44; The circular 96b of tapped hole portion, it is formed on the baseplate part 96a; The columned post 96c of portion, its up/down perforation baseplate part 96a and installing, inside is formed with open passage portion 96f downwards; Joint 96d, it is configured as the tubulose of both ends open and is installed on the 96c of post portion, and an end is communicated with the other end with passage portion 96f and opens to the outside.
In addition, engagement member 96 constitutes, and the distance at the center of the distance at the center of the 96b of tapped hole portion and the center of passage portion 96f and the central, threaded hole 44c of portion of cam chain tension means 44 and the center of accommodation section 44g about equally.And, the 96c of post portion, than the more outstanding part of seat surface 96e is installed, external diameter forms slightly littler than the internal diameter of the accommodation section 44g of cam chain tension means 44, and the outstanding length in its below forms shorter slightly than the degree of depth of accommodation section 44g.On the 96c of this post portion, will be called insertion part 96g downwards from the outstanding part of seat surface 96e is installed.
Under the state that like this center is aligned, inserting bolt in the 96b of tapped hole portion of engagement member 96 and the central, threaded hole 44c of portion, engagement member 96 is fixed on the cam chain tension means 44, and the central, threaded hole 44c of portion is by obturation.On the joint 96d of the bonding apparatus 95 that constitutes like this, be connected with the second supply passage 92b, from the air of air cleaner 80 interior pressure variable supply cam chain chamber 45 according to the 14a of crankshaft room.
Structure according to this present embodiment, on the cam chain tension means 44 that is installed on the cylinder block 13, be formed with from the outside of cylinder block 13 to the access 44f of internal communication, with joint 96d that this access 44f is communicated with on be connected with new gas supplying tubing 92.Therefore, with as the existing structure that special-purpose mounting construction is set on cylinder head cover 12 float chambers 14 compare, can reduce the part number and constitute, and can easily constitute leakage restoring device 90.
In addition, cam chain tension means 44 and cam chain 43 relative configurations, even for access 44f, the opening of internal communication space 60 sides is also relative with cam chain 43, and opens to cam chain chamber 45.On the other hand, if drive 43 actions of this chain mechanism 40 cam chains, near the oil component that gas leakage contained that then is in cam chain 43 is atomized.Therefore,, also can reduce the intrusion of oil component, prevent the reduction of seepage efficient, and can reduce the stained of control valve 93 even exist the gas leakage in the cam chain chamber 45 to flow into the situation of the second supply passage 92b from access 44f.
In addition, textural at cam chain tension means 44, by the bolt that is used for the inaccessible central, threaded hole 44c of portion that always adopts in the assembling stroke, engagement member 96 is fixed on the cam chain tension means 44.Thus, avoid increasing part number or assembling stroke, the installation that can carry out engagement member 96 constitutes bonding apparatus 95.
At this, cam chain chamber 45 forms more wide space in order to accommodate cam chain 43, in addition, for be in the 14a of crankshaft room near, form the space of the bigger effect of influence of the interior pressure change of comparing the 14a of crankshaft room with the inner space of cylinder head 12.The air of gas supplying tubing 92 because the interior pressure variable supply that is subjected to this cam chain chamber 45 is made a fresh start, therefore the air delivery volume from air cleaner 80 increases, thereby can realize the raising of seepage efficient.
The air leakage access structure of internal-combustion engine of the present invention is not limited to the structure of the foregoing description, can suitably change.For example, make the air leakage access structure of internal-combustion engine of the present invention be applicable to the scooter type cart and be illustrated, even but be applicable to other vehicle etc., also can similarly implement to obtain same effect.In addition, subsidiary engine of the present invention is not limited to cam chain tension means 44, so long as the device of the access that can be shaped integratedly etc., also can adopt other subsidiary engine.
Claims (4)
1. the air leakage access structure of an internal-combustion engine has:
Shell, it has crankcase, is formed with the internal communication space that is communicated with the crankshaft room of the inside that is formed at described crankcase in inside;
Leakage restoring device, it makes blow-by gas recirculation in the internal communication space of described shell to suction means; With
Cam chain tension means, it is installed on the described shell, the action of auxiliary internal-combustion engine,
It is characterized in that:
Described leakage restoring device has: new gas supplying tubing, and it is used for to the air of the internal communication space of described shell guiding from described suction means,
On described cam chain tension means, be formed with from the access in the described internal communication of the external communications of described shell space,
On described access, be connected with described new gas supplying tubing.
2. the air leakage access structure of internal-combustion engine according to claim 1 is characterized in that,
Described cam chain tension means is located at the tension force of timing chain effect regulation of chain drive in the internal communication space of described shell to formation, be to suppress the lax chain tensioning device of described timing chain.
3. the air leakage access structure of internal-combustion engine according to claim 2 is characterized in that,
On described chain tensioning device, be formed with: the press part, it pushes described timing chain; Tapped hole, it is inserting the locking component of the push action of pinning described press part when described shell is installed, replace described locking component to insert obstruction component from the outside after installation,
Described new gas supplying tubing is installed on the described chain tensioning device, and is connected on the described joint of the engagement member that is formed with the joint that is communicated with described access,
Described engagement member is fixed on the described chain tensioning device via described obstruction component.
4. the air leakage access structure of internal-combustion engine according to claim 3 is characterized in that,
Described timing chain in described internal communication space, be located at described crankshaft room near,
Be subjected to the interior pressure change of described crankshaft room from the air of described new gas supplying tubing, be directed to the internal communication space of described shell.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005248728A JP4469769B2 (en) | 2005-08-30 | 2005-08-30 | Blow-by gas passage structure of internal combustion engine |
| JP2005248728 | 2005-08-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1924307A CN1924307A (en) | 2007-03-07 |
| CN100523443C true CN100523443C (en) | 2009-08-05 |
Family
ID=37817088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101101433A Expired - Fee Related CN100523443C (en) | 2005-08-30 | 2006-08-07 | Air leakage access structure of internal combustion engine |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4469769B2 (en) |
| KR (1) | KR100736196B1 (en) |
| CN (1) | CN100523443C (en) |
| ES (1) | ES2319358B2 (en) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2250200A (en) * | 1938-05-27 | 1941-07-22 | Donaldson Co Inc | Crankcase ventilating system |
| JP2678294B2 (en) * | 1988-09-13 | 1997-11-17 | マツダ株式会社 | Blow-by gas recirculation system for V-type engine |
| JPH0723531Y2 (en) * | 1988-10-18 | 1995-05-31 | 日産自動車株式会社 | Blow-by gas recirculation system for engines |
| JPH02149809U (en) * | 1989-05-23 | 1990-12-21 | ||
| JPH0799088B2 (en) * | 1989-05-29 | 1995-10-25 | 日産自動車株式会社 | Chain cover for internal combustion engine |
| JPH03122242U (en) * | 1990-03-26 | 1991-12-13 | ||
| JP3021575B2 (en) * | 1990-08-27 | 2000-03-15 | スズキ株式会社 | Breather device |
| JP3163555B2 (en) * | 1994-07-14 | 2001-05-08 | ヤマハ発動機株式会社 | Engine blow-by gas discharge device |
| JP3331763B2 (en) * | 1994-09-20 | 2002-10-07 | 日産自動車株式会社 | Blow-by gas ventilation system for internal combustion engine |
| JPH08326520A (en) * | 1995-06-01 | 1996-12-10 | Nissan Motor Co Ltd | Blow-by gas ventilating device for internal combustion engine |
| JP2001248416A (en) * | 2000-03-02 | 2001-09-14 | Yamaha Motor Co Ltd | Blow-by gas return system in engine |
| JP4502737B2 (en) * | 2003-08-29 | 2010-07-14 | 本田技研工業株式会社 | Blow-by gas ventilation system for internal combustion engines |
-
2005
- 2005-08-30 JP JP2005248728A patent/JP4469769B2/en not_active Expired - Fee Related
-
2006
- 2006-06-28 ES ES200601741A patent/ES2319358B2/en not_active Expired - Fee Related
- 2006-07-13 KR KR1020060065825A patent/KR100736196B1/en not_active IP Right Cessation
- 2006-08-07 CN CNB2006101101433A patent/CN100523443C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007064038A (en) | 2007-03-15 |
| ES2319358B2 (en) | 2010-01-11 |
| KR20070025979A (en) | 2007-03-08 |
| KR100736196B1 (en) | 2007-07-06 |
| ES2319358A1 (en) | 2009-05-06 |
| CN1924307A (en) | 2007-03-07 |
| JP4469769B2 (en) | 2010-05-26 |
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