CN1103854C

CN1103854C - Leakage restoring device

Info

Publication number: CN1103854C
Application number: CN99123417A
Authority: CN
Inventors: 荻巢纪之; 松浦弘明
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 1998-11-04
Filing date: 1999-11-04
Publication date: 2003-03-26
Anticipated expiration: 2019-11-04
Also published as: JP2000145555A; CN1253234A; JP4036988B2

Abstract

A return passage extending from the breather chamber of an engine is connected at one end to a joint part at the lower end of a return chamber. The return chamber is integrated with the interior of a clean side in an air cleaner case body so as to connect to the clean side via a communication hole formed in the top of a return chamber cover. An inflected passage including ribs is defined between the joint part and the communication hole to offer a vapor-liquid separation section where blowby gas is filtered to give gas contents, which is fed into the clean side via the communication hole, and water contents, which is urged to flow back into the joint part or into the return passage that returns it to the crankcase breather chamber. This system requires no drain lines and only simple pipe arrangement to thus reduce the number of components used.

Description

Leakage restoring device

Technical field

The present invention relates to internal-combustion engine leakage restoring devices such as a kind of motor bike.

Background technique

In Japan's reality public clear 56-24258 number, showed such leakage restoring device: the leakage restoring chamber of integrally formed long path shape from the air filter housing top wall along back face wall; The reduction path of this upper end portion, reduction chamber by pipeline etc. led to the gas leakage generating unit of motor, and its lower end is connected to discharge pipe.Import the gas leakage in this device, by gas-liquid separation, gas componant is taken near the inlet by the guide pipe supply company that is installed in air filter housing top wall inboard, together sends into vaporizer with the peace and quiet air in the clean side during flowing to the bottom from top.

But even make reduction chamber and air filter housing integrally formed as above-mentioned, the path that also needs to reduce is with pipe arrangement and discharging pipe arrangement, owing to the conduits structure more complicated, so wish the conduits structure simplification.In addition, produce obstruction, wish as far as possible gas leakage to be supplied near the connecting tube inlet for not making it be attached to filter; But just need guide pipe as described above etc., this has just increased part number for this reason.But the present invention promptly is the simplified construction that provides in order to address these problems, the leakage restoring device that reduces the part number.

Summary of the invention

For solving above-mentioned problem, a kind of internal-combustion engine leakage restoring device of the present invention, with the gas leakage of motor carry out gas-liquid separation, with gas reduction to the clean side of air filter housing, it is characterized in that, it is integrally formed with air filter housing in clean side to reduce the chamber, is connecting from starting an end of the extended reduction path of pusher side in the bottom of this reduction chamber; And the top in the reduction chamber is provided with connecting port towards clean side, simultaneously, is provided with the gas-liquid separation portion that is formed by curved pathway between the joint of aforementioned reduction path and connecting port.

Be collected in the gas leakage of motor ventilation chamber, because of intake negative-pressure is incorporated into the air filter housing side, enter the indoor bottom of reduction by the reduction path, gas-liquid separation in the middle of the curved pathway by gas-liquid separation portion is moved upward, the oil-containing gases composition enters clean side from connecting port and supplies with vaporizer, aqueous composition such as moisture is wandered through curved pathway and is entered the reduction path downwards, gets back to the ventilation chamber of starting pusher side.

For this reason, the past, required discharge pipe just no longer needed, and only this can simplify conduits structure.In addition, chamber and air filter housing are integrally formed owing to reducing in clean side, can form the reduction chamber at an easy rate; Simultaneously, can not need conduit and directly be communicated in the clean side.Thereby, but the unitary construction of simplified reduction device reduces part number, therefore also just can reduce cost.

Description of drawings

Fig. 1 is the left side view that is suitable for embodiment's motor bike;

Fig. 2 amplifies the figure that its motor of expression is wanted the portion side on every side;

Fig. 3 is the further enlarged view of air filter housing part;

Fig. 4 is its drawing in side sectional elevation;

Fig. 5 removes lid and represents the enclosure body portion side view that it is inner;

Fig. 6 is the partial enlarged drawing represented of a part of cutting the reduction chamber open.

Embodiment

Borrow one of the present invention that description of drawings is applicable to motor bike embodiment.Fig. 1 is the left side view of the direct of travel seen outside the motor bike of expression; Fig. 2 amplifies the figure that its motor of expression is wanted the portion side on every side; Fig. 3 is the side view that further amplifies expression air filter housing part; Fig. 4 is its drawing in side sectional elevation; Fig. 5 takes off the side view that lid is represented the enclosure body portion that it is inner; Fig. 6 is a partial enlarged drawing of a reduction chamber part being cut open expression.

At first, the unitary construction of this motor bike of diagrammatic illustration.As shown in Figure 1, this motor bike is American structure, and it has following feature: the front-wheel 1 and trailing wheel 2 that constitute Long Wheelbase, the front fork 3 of big deflecting roller back rake angle, steering tiller 4, fuel tank 5, and the lower double seat 6 in mounting point, and the backrest 7 of rear portion setting etc.

Be disposed at the motor 8 between front and back wheels, such as being small-sized air cooled engine about 100CC.Cylinder head 9 along the fore-and-aft direction approximate horizontal keeping flat, suck mixed gass from the vaporizer 10 of top, the outlet pipe 11 through rearward extending from relief opening carries out exhaust with baffler 12.

Vaporizer 10 is supplied with fresh air from fuel tank 5 fuelings from the air-strainer (housing) 13 at rear.And vaporizer 10 is configured in fuel tank 5 belows and becomes in the folded space of front side cap that pairing left and right is provided with 14.Air filter housing 13 is configured in the rear of vaporizer 10, covers its left and right sides by central side cover 15.

Motor 8 roughly circlewise the front portion of framework of body is supported by side-looking in the framework of body (Fig. 1), and this part is by head pipe 16, upper tube 17, down tube 18, and lower tube 19 and articulated slab 20 constitute.Upper tube 17 from the beginning manage along the vehicle body center 16 rearward extend, supporting fuel case 5, simultaneously, in the bending of vehicle body substantial middle portion, extend downwards, be connected on the articulated slab 20.

The framework of body rear portion roughly becomes truss-like to constitute by seat rail 22 and side framework 23, and wherein seat rail 22 becomes pairing left and right approximate horizontal ground rearward to extend and supporting double seat 6 from the curved part of upper tube 17; Side framework 23 connect lower tube 19 rearward end, upwards extend back sideling, be connected on the intermediate portion of a rail 22 through articulated slab 20 sides.Roughly disposing air filter housing 13 in the space of triangularity in this side-looking, and then this space is covered by aforementioned central side cover 15.

Can free joltily support the front end of back vent 24 on articulated slab 20, trailing wheel 2 is supporting in portion in its back-end.Symbol 25 is buffers among the figure.

Bottom is described in more detail motor structure on every side by Fig. 2.Vaporizer 10 is connected on the air filter housing 13 by connecting tube 30; The intakeport that connects cylinder head 9 through inlet tube 31.The breathing pipe 33 that one end is connecting the float chamber 32 of vaporizer 10 sets along connecting tube 30, and its other end nearby opens wide at air-strainer 13.

The ventilation chamber that is provided with in the crankcase 34 of motor 8 is connecting an end of the reduction path 35 that is made of pipe etc.; Its other end then rearward extends through the top of crankcase 34 and is connected in the reduction chamber 36 that is located in the air filter housing 13.

As shown in Figure 3 and Figure 4, air filter housing 13 by to the enclosure body portion 40 of vehicle body left open, cover the lid 41 of this opening portion and be sandwiched in enclosure body portion 40 and the filter 42 of 41 on lid constitutes, clip that filter 42, enclosure body portion 40 are inboard to be clean side 43; Lid 41 inboards are dirty side 44.

Part in clean side 43 is provided with reduction chamber 36, and this reduction chamber is that the base section ground of enclosure body portion 40 is upheld and the incorporate cell of formation to the vehicle body right side.Reduction chamber opening portion 45 is closed with covering 46 by the reduction chamber, and separates with clean side 43.

Rear portion side at lid 41 is provided with conduit 47, and an end of this conduit 47 is at dirty side 44 inner openings; Its other end is to the rear extension and the opening of air filter housing 13.For this reason, be drawn into the outer gas in the dirty side 44 from the rear of air filter housing 13, after filtering through filter 42, enter clean side 43, be sent to connecting tube 30 from the front of enclosure body portion 40.

As shown in Figure 4, the intermediate portion of breathing pipe 33 is supported by integrally formed guide portion 37 on enclosure body portion 40 connecting tube 30 peripheral parts nearby.In addition, in opening end 49 scopes of breathing pipe 33, covered, hidden its outward appearance by the front end coating portion 48 of the central side cover 15 on vehicle body right side from part that this guide portion 37 is set.

Symbol 38 among Fig. 4 is toolboxes integrally formed with enclosure body portion 40; The 39th, be communicated with the discharge pipe in the dirty side 44.

The detailed construction of reduction chamber 36 now is described with Fig. 4～Fig. 6.Reduction chamber 36 is positioned near the inlet of the connecting tube 30 of clean side 43 openings, and the joint 50 that its underpart is provided with forms from enclosure body portion 40 one are outstanding, and has been communicated with reduction path 35 herein.

The top of reduction chamber 36, the connecting port 51 that is formed by reduction chamber cap 46 tops is communicated with clean side 43 (Fig. 6).Reduction chamber cap 46 is installed by 52 one of fixing part up and down of diagonal angle configuration, and is covered with opening portion 45 with hot riveting.

Between the connecting port 51 of the joint 50 of underpart and upper end portion, by forming curved pathway 54 with reduction chamber 36 internal faces rib 53 integrally formed, that along continuous straight runs staggers mutually, this part becomes gas-liquid separation portion.

Bottom illustrates the effect of present embodiment.As Fig. 2, Fig. 4 and shown in Figure 5, be collected in the gas that spills in the ventilation chamber of crankcase 34, by intake negative-pressure from vaporizer 10 1 side draughts to air filter housing 13, enter the bottom of reduction chamber 36 from connector portions 50 by reduction path 35, again by forming the curved pathway 54 of gas-liquid separation portion, during being moved upward by gas-liquid separation.

The gas componant of oil-containing enters clean side 43 from connecting port 50, infeeds vaporizer 10 with the peace and quiet air that filters through filter 42 from connecting tube 30 here.

On the other hand, the liquid constituent of moisture grade is wandered downwards through curved pathway 54, and through reduction path 35, the ventilation chamber of getting back to crankcase 34 is recovered in the mixed solution of the oil of the liquefaction that portion was detained within it and water from connector portions 50.

Thereby, because the aqueous composition of gas-liquid separation reduces processing repeatedly.Improved the collecting efficiency of the fuel that disperses etc., simultaneously, sufficient capacity has been arranged, also be out of question to wherein reclaiming aqueous composition owing to can guarantee the ventilation chamber in the crankcase 34.Therefore, owing to do not need directly to discharge outside the car with pipe arrangement by discharging, no longer need to use independent discharge pipe as prior art, only this can simplify conduits structure.

Particularly in gas leakage in the less mini engine of moisture absolute content, because the aqueous component contents such as moisture that return tail off, and are even reclaim aqueous composition to the less ventilation chamber of the Capacity Ratio of crankcase 34, also no problem fully, its result also is applicable to the motor that air leakage is few.

In addition, make reduction chamber 36 integrally formed with air filter housing 13 in clean side 43, and directly be opened on connecting port 50,, simultaneously, nearby open connecting port 50, do not need as prior art, to be provided with guide pipe as inlet at connecting tube 30 so form easily.Therefore, can reduce the part number, simplified construction, and can reduce adhesion amount as much as possible to filter 42.

In addition, owing to can form reduction chamber 36 by widen air filter housing 13 to the overall width direction, even so limit under the very tight situation for the configuration space of air-strainer 13 at the vehicle body above-below direction, reduction chamber 36 also can obtain necessary and sufficient certain assurance at an easy rate with the capacity of clean side 43.

Moreover, the invention is not restricted to the foregoing description, various application possibilities are arranged, such as, on the internal-combustion engine applicable to the various vehicles beyond the automotive bicycle.In addition, also can be the reduction chamber be contained in clean side 43 inside with lid 46, and makes the reduction chamber 46 unlimited, be installed on its outside to the outside of enclosure body portion 40 with covering.Besides, the ventilation chamber of motor also is not limited to be located in the crankcase 34, also can be located at other suitable positions.

Claims

1. internal-combustion engine leakage restoring device, with the gas leakage of motor carry out gas-liquid separation, with the clean side of gas reduction to air filter housing, it is characterized in that,

It is integrally formed with air filter housing in clean side to reduce the chamber, is connecting from starting an end of the extended reduction path of pusher side in the bottom of this reduction chamber; And the top in the reduction chamber is provided with connecting port towards clean side, simultaneously, is provided with the gas-liquid separation portion that is formed by curved pathway between the joint of aforementioned reduction path and connecting port.