CN1759235A - Superstructure of engine - Google Patents

Abstract

With regard to a construction that a fan 41 is provided at one side of an engine 1 and covered by a fan casing 45, and an air cleaner 30 is arranged near the fan casing 45 and at a side of a cylinder head 5 on which an intake port 5a is disposed, a suction port 31a communicated with the inside of the fan casing 45 is provided in a main body 31 of the air cleaner 30. A barrier 46 is provided at a position facing to the suction port 31a in the air cleaner 30. A wall standing toward the fan casing 45 and the cylinder head 5 is formed on the outer surface of the main body 31 of the air cleaner 30. An air intake part is provided on one of side surfaces of a cover body 32 of the air cleaner 30 and the cover body 32 is constructed to be an equilateral polygon. An intake pipe 31k communicating the air cleaner 30 with the intake port 5a of the cylinder head 5 is constructed integrally with a main body 31 of the air cleaner 30.

Description

The superstructure of motor

Technical field

The present invention relates to the superstructure of motor, at length say, relate to the air-strainer that the air to the firing chamber that supplies to motor purifies structure, be arranged on the structure and the structure of air-breather on the top of valve arm chamber from air-strainer and air-breather to the suction unit of cylinder head.

Background technique

, in motor, waited on the position at an upper portion thereof in the past, be provided for purifying the air-strainer of the air of supplying with the firing chamber, import extraneous gas and purify, this extraneous gas that has purified was supplied with the firing chamber as combustion air by this air-strainer.

In this air-strainer, on cover body, suction unit is set as the member of formation of air-strainer, directly extraneous gas is sucked air-strainer from this suction unit, perhaps, for example Japanese patent gazette is opened introduce in flat 5-50061 number such in fact, the suction unit of air-strainer is connected with another device that has air cooling mechanism, imports air-strainer through passage from suction unit install chilled air by this, and then in motor, import combustion air.

, such as described above, in the occasion that directly imports extraneous gas, when engine configurations is waited, often can not import cold air in the housing of sealing owing to the hot gas of motor self from the suction unit that is arranged at air-strainer.In addition, open in fact in the technology of introducing for flat patent gazette 5-50061 number in aforementioned Japan, owing to use passage to connect air cooling mechanism and air-strainer, so number of spare parts increases and cost up.

In addition, air-strainer is installed in through sucking pipe on the intakeport on the cylinder head that is arranged at motor, but in such air-strainer, length and shape by the change sucking pipe, can be installed in position arbitrarily to air-strainer, the air that has been purified by air-strainer be imported intakeport through sucking pipe.

; even in the air-strainer on this intakeport that is installed in through sucking pipe on the cylinder head that is arranged at motor; for example; as the Japanese patent gazette spy open in 2001-73897 number introduce; because air-strainer and sucking pipe separate, so number of spare parts increases and cost improves.Have again, owing to use sucking pipe that air-strainer is installed on the cylinder head, so be difficult to make the structure of compact type.

Top at identical motor, in the past, in the valve arm housing above the coating gas cylinder cap ventilation chamber is set, adjust in the valve arm housing and the pressure between the extraneous gas, setting simultaneously has a seepage gas separation that is used for containing mist of oil and becomes the air-breather of the ventilation chamber of gas componant and oil component, is discharged from engine body exterior so that prevent mist of oil.The ventilation chamber of this air-breather is used by the sidewall of valve arm housing (air-breather housing) with space that this empty base plate of opening the certain intervals setting in valve arm housing the inside fences up to constitute, and catches oil component in the seepage gas by the filter screen that is configured in vent chamber etc.In this air-breather, for example, as Japanese patent gazette real open introduce in flat 6-4311 number, owing to form the sidewall of aforementioned air-breather housing and base plate etc., so exist when reducing part number and rigger, improve producibility, eliminate the technology etc. of noise of vibration of motor of resulting from.

In addition, on air-breather, also can be provided for preventing becoming in the valve arm housing of motor the one-way valve of high pressure.In having the air-breather of this one-way valve, the gas that becomes high pressure is discharged from the one-way valve that prevents adverse current, returns intakeport again.Vent chamber at this air-breather, accumulating has at the indoor lubricant oil that disperses of valve arm, when this lubricant oil is stored into to a certain degree, adheres to this lubricant oil near the inlet of aforementioned one-way valve, lubricant oil is discharged by one-way valve, thereby the gas that contains lubricant oil turns back to intakeport.If what influence a spot of this lubricant oil does not then have, but when the amount of the lubricant oil that sucks from the inlet of one-way valve increases, this lubricant oil is in the firing chamber internal combustion, produces the exhaust injection and makes the exhaust variation.For the intrusion of the lubricant oil that prevents to become the reason that this exhaust sprays as much as possible, be provided with baffle plate at the periphery of the vent of air-breather.

But, this baffle plate forms the roughly space of tubular with the wall of valve arm housing, when the lubricant oil more than a certain amount of is full of ventilation chamber, in the occasion of motor being carried on Trolley etc., the inclination of motor or vibration are shaken the liquid level of the lubricant oil of storage, have the danger that lubricant oil is drunk up same as before.

On the other hand, in the winter time or the low place of temperature such as cold area, the mixed gas firing chamber can't reach the occasion that the combustion temperature motor is difficult to start all the time because air temperature is low thereby exist.Therefore, in the past, in diesel engine, for being burnt easily, mixed gas improves compression ratio, thereby the path of the starting aid of the injection wet goods that is communicated with intakeport is set on the top of motor, injects the starting aid from this path, this starting aid enters the firing chamber from intakeport.Like this, only improved the compression ratio of the part of the starting aid that enters the firing chamber, the burning easily thereby mixed gas becomes, motor becomes and starts easily.The technology of the startability of this raising motor has become the crowd and has known technology.

But for the shape of the injection path of original starting aid, when injecting as the starting aid of motor oily, the user often injects the above oil of established amount.So, unnecessary oil enters the firing chamber, thus, exist to produce oil hammer and damages danger such as connecting rod.And when the injection path of this starting aid is set in addition, then can increase cost.

Summary of the invention

Therefore, the objective of the invention is to, in the superstructure of motor, improve the mounting structure of air-strainer, the occasion in the housing that engine configurations is being sealed etc., can in air-strainer, suck cool air, simultaneously, in the occasion that connects air-strainer and air cooling mechanism, can connect with simple structure, part number is reduced and reduce cost, make compact structure.

In addition, its purpose is, for air-breather, is arranged on the shape of the baffle plate on the vent (inlet) of air-breather by design, prevent to suck the lubricant oil that is full of vent chamber, prevent to spray from the exhaust that the lubricant oil that this vent sucks produces from vent.And its purpose is, the shape of the injection path by designed engines starting aid even general user etc. also can inject the starting aid well, prevents to overflow or the generation of oil hammer.Have, its purpose is that the injection path for air-breather and starting aid by with the top of its centralized configuration at motor, provides the superstructure of the motor of compactness again.

The present invention is provided with fan in a side of motor, covers this fan by blower-casting, and near configuration air-strainer this blower-casting on the main body of this air-strainer, is provided with the suction port to aforementioned blower-casting inner opening.Thus, the suction port of the extraneous gas of blower-casting has concurrently as the effect of the inlet of the cooling air of motor with as the effect that sucks the suction port of combustion air to air-strainer.That is, for example, in the occasion (occasion of the motor of sound insulation type) that engine configurations is waited in the housing of sealing, because, suction port can only be provided with one, so the design of air-breathing stream becomes easily, in the place that can supply with the cool air that cleans most suction port is set and becomes easy.

In addition, owing to can directly import air-strainer to the air in the blower-casting, so can unify suction system and make compact structure.And, owing to, can suck few air such as dust in the air-strainer, so can seek the long lifetime of the parts of air-strainer by the air in the suction fan housing is imported air-strainer.

Have again, owing to can use common air-strainer, so can reduce its kind and can reduce cost in the occasion of the motor of common motor and sound insulation type etc.

In addition, the present invention on the position relative with aforementioned suction port, is provided for disperseing the barrier of inhaled air.Thus,, run into backbarrier by dispersion and the not direct collision above-mentioned parts relative, be guided to that to spread all over parts all with suction port by the suction port inhaled air.Thus, can avoid air to be inhaled into the deflection of parts, also a part that can a plug members or only make a part of variation of parts is so can seek the long lifetime of parts.

In addition, the present invention is configured in the sidepiece of cylinder head to aforementioned air-strainer, simultaneously, forms the wall portion towards cylinder head side erects in the main body outside of air-strainer.Thus,, therefore, do not need to be provided in addition the baffle of handle, can reduce cost from the air guide cylinder head side of aforementioned fan because the main body of aforesaid wall portion and air-strainer constitutes and play the effect of baffle integratedly.

In addition, the present invention is provided with air-strainer with main body and cover body storage member in the suction side of motor, in the superstructure of this motor, forms the recess that is consistent with the peripheral shape of above-mentioned parts in the inboard of aforementioned body.Thus, when being contained in parts on the main body, before being fastened on parts on the main body,, can easily position by by the recess holding member that on main body, forms with bolt, nut etc.Thus, can prevent the loading error of parts, simultaneously can be simply and promptly assemble air-strainer.

In addition, the present invention is provided with air-strainer with main body and cover body storage member in the suction side of motor, in the superstructure of this motor, on a side of aforementioned cover body suction unit is set, and simultaneously, this cover body is made regular polygon.Thus, by cover body revolution predetermined angular is changed installation direction, can change the direction of suction unit.In addition, owing to can make opposite direction to the position of suction unit, can easily carry out the specification change of motor by the installation direction of cover body.

In addition, the present invention installs air-strainer on the intakeport of the cylinder head of motor, in the superstructure of motor, constitutes the sucking pipe that is communicated with aforementioned intakeport integratedly on the main body of aforementioned air-strainer.Thus, do not need sucking pipe is installed on air-strainer as in the past, can reduce number of spare parts, can reduce cost.Have again, can make simply with die casting or injection molding and forming etc. owing to contain the main body of sucking pipe, so can reduce cost.In addition, can shorten the width (sucking pipe direction) of main body.Thus, in the occasion that constitutes air-strainer with original size, because the parts in the air-strainer can increase the part that main body shortens, so can seek the long lifetime of parts.

In addition, the present invention be provided with on the aforementioned body be positioned at aforementioned air-strainer near the suction port that is communicated with of blower-casting.Thus, the suction port of the extraneous gas of blower-casting has concurrently as the effect of the inlet of the cooling air of motor with as the effect that sucks the suction port of combustion air to air-strainer.Promptly, for example, in the occasion (occasion of the motor of sound insulation type) that engine configurations is waited in the housing of sealing, because a suction port can only be set, so the design of air-breathing stream becomes easily, in the place that can supply with the cool air that cleans most suction port is set and becomes easy.

In addition, owing to can directly import air-strainer to the air in the blower-casting, so can unify suction system and make compact structure.And, owing to, can suck air-strainer to few air such as dust, so can seek the long lifetime of the parts of air-strainer by the air in the suction fan housing is imported air-strainer.

Have again, owing to can use common air-strainer, so can reduce its kind and can reduce cost in the occasion of the motor of common motor and sound insulation type etc.

In addition, the present invention forms in the outside of aforementioned body towards the wall portion that is positioned at edge-on of near the aforementioned air-strainer fan hub side and motor.Thus because the main body of aforesaid wall portion and air-strainer constitutes and plays the effect of baffle integratedly, so do not need to be provided in addition from the air of aforementioned fan to the baffle that cylinder head side leads, can reduce cost.

In addition, the present invention is with two casees casting mold moulding aforementioned body, comes moulding to be arranged on suction port on the main body by two molds of tight contact simultaneously, makes it to become the direction vertical with the withdrawing pattern direction.Thus, can easily come forming body by aluminium die casting.In addition and since can with by the moldings formed therefrom main body in the moulding suction port, so can save the processing in hole, thereby can reduce cost.

In addition, the present invention makes the inlet hole of aforementioned sucking pipe the elongated shape of the intakeport of aforementioned cylinder head.Thus owing to can successfully carry out from air-strainer through inlet hole can preventing from inlet passage, to produce turbulent flow to the flowing of the air of intakeport, so can be stably from air-strainer to the intakeport air supply.For this reason, the resistance force diminishes on the sucking pipe part of the air that imports from intakeport when the valve opening of Aspirating valves flows in the cylinder, can help the eddy current (vortex) that forms at air.

In addition, the present invention is provided with air-breather on the top of valve arm chamber, in the superstructure of this motor, around the vent of the indoor air-breather of aforementioned valve arm baffle plate is set, and the slit of the below of open this baffle plate is set simultaneously.Thus, even accumulate in more than the position of lower end that the indoor lubricant oil of valve arm is positioned at baffle plate, also can suck from aforementioned vent so can prevent to accumulate in the indoor lubricant oil of valve arm from being arranged on the slit exhausting air on the baffle plate.That is, indoor as long as lubricant oil is not full of the valve arm, just can prevent intrusion from the lubricant oil of vent, can prevent the exhaust injection that this lubricant oil produces, can improve venting quality.In addition, because moulding aforementioned slots simply, punching is not set in addition replaces slit, can obtain aforesaid effect with simple structure so do not need to process etc. with boring.

In addition, the present invention constitutes going back circulation flow path and starting aid injection path of aforementioned air-breather integratedly on the valve arm housing of aforementioned valve arm chamber.Thus, in the valve arm housing, because can the centralized configuration air-breather and starting aid injection portion, so can reduce number of spare parts and seek the simplification of the reductionization and the manufacturing procedure of cost, can seek save spaceization simultaneously.

In addition, the present invention is provided with air-breather on the top of valve arm chamber, in the superstructure of this motor, is communicated with going back circulation flow path and starting aid injection path of aforementioned air-breather, simultaneously, on this starting aid path restriction is set.Thus, when the oil that injects as the starting aid,, can prevent from excessively to inject by being arranged on the injection amount that the restriction of injecting on the path automatically limits the starting aid.In addition, inject because the injection amount of starting aid is restricted very slowly, so, even general user etc. also can go into eyes affirmation injection amount marginal not on the limit, can prevent that a large amount of oil from sucking overflowing and the oil hammer phenomenon of producing in the firing chamber quickly.

In addition, the present invention, intakeport in the cylinder head on the top that is arranged on the coating gas cylinder body sucks air, be configured aforementioned intakeport in aforementioned cylinder head below Aspirating valves this air is supplied with the firing chamber, in the superstructure of this motor, aforementioned intakeport outside inner face is made from the shape of plan view near the tangent direction of the cylinder liner in the aforementioned cylinder block.Thus, owing to can flow into the very little air of resistance in the outside of intakeport, so the flow velocity of outside air accelerates.Thus, become big, be easy to generate the vortex of air-flow in the difference of the flow velocity of the inboard of intakeport and outside inhaled air.That is, by the shape of this intakeport, what can not hinder air as far as possible fluidly easily produces strong eddy current (vortex), thereby air and fuel are well mixed, so can improve combustion efficiency and promote burning.

Description of drawings

Fig. 1 is the elevation cross-sectional view of motor.

Fig. 2 is the side cutaway view of motor.

Fig. 3 is the side cutaway view on motor top.

Fig. 4 is the side cutaway view of air-strainer.

Fig. 5 is the stereogram of the barrier in the expression air-strainer.

Fig. 6 is the rear view of air-strainer.

Fig. 7 is the worm's eye view of air-strainer.

Fig. 8 is the front view of the cover body of air-strainer.(a) be the front view that suction unit is arranged on the left surface of cover body.(b) be the front view that suction unit is arranged on the right flank of cover body.

Fig. 9 is the front view of the cover body of air-strainer.(a) be the top front view that suction unit is arranged on cover body.(b) be the following front view that suction unit is arranged on cover body.

Figure 10 is the top plan view of cylinder head.

Figure 11 is the plan view of valve arm housing.

Figure 12 is the worm's eye view of valve arm housing.

Figure 13 is that A-A among Figure 11 is to pseudosection.

Figure 14 is that B-B among Figure 11 is to looking midship section figure.

Embodiment

At first, all structures of motor 1 of the present invention are described to Fig. 3 with Fig. 1.

Motor 1 constitutes its upper part of body by cylinder block 2, is made of the bottom of its body crank box 3.Cylinder block 2 is the cylinder 2a of portion's formation above-below direction in the central, takes in piston 4 in the cylinder liner 17 in cylinder 2a the above-below direction free sliding.Below cylinder block 2, crankshaft 10 is bearing on the crank box 3 by axle along fore-and-aft direction ground, is connected by connecting rod 18 between this crankshaft 10 and piston 4.

The top of aforementioned cylinder block 2 is covered by cylinder head 5.Configuration Aspirating valves 22, outlet valve 23, fuel injection nozzle 6 etc. in this cylinder head 5.The top of cylinder head 5 is covered by valve arm housing 21 and constitutes valve arm chamber 20, at the side configuration baffler 8 of valve arm housing 21, at opposite side configuration fuel tank 9.And aforementioned fuel injection nozzle 6 is separated by valve arm housing 21 between Aspirating valves 22 and outlet valve 23, and its front end (carry-out part) is inserted in the firing chamber 19 that forms on the top position, center in the cylinder 2a, can be in this firing chamber 19 burner oil.

The assembly departments of upper end portion, valve arm 2526 and the fuel injection nozzle 6 of upper end portion, push rod 24 and the exhaust push rod of installation Aspirating valves 22 and outlet valve 23 in aforementioned valve arm chamber 20 (diagram is omitted) etc. simultaneously, are provided with air-breather 50 described later.

Configuration adjustment device 11 in aforementioned crank box 3 is at the top of this regulator 11 configuration fuel-injection pump 12.Fuel-injection pump 12 sucks fuel by its inner plunger 15 of push-and-pull from fuel tank 9, supply with quantitative fuel with scheduled time to aforementioned fuel injection nozzle 6, sprays to firing chamber 19 from this fuel injection nozzle 6.At this moment, the power of crankshaft 10 is given camshaft 13 through the gear transmission that is arranged on this crankshaft 10, and the push pull maneuver of plunger 15 is undertaken by the revolution that is arranged on the cam 14 on this camshaft 13.

In addition, as shown in Figures 2 and 3, aforementioned Aspirating valves 22 and outlet valve 23 are configured in the top of piston 4.The valve head 22a separately and the 23a of these Aspirating valvess 22 and outlet valve 23 are bearing in respectively on the following valve seat that is formed at cylinder head 5, are configured in previous combustion chamber 19 respectively and are formed between the intakeport 5a or relief opening 5b on the cylinder head 5.And, air-strainer 30 of the present invention is set on the suction side sidepiece of cylinder head 5, intakeport 5a is communicated with this air-strainer 30, and relief opening 5b is communicated with aforementioned baffler 8 through exhaust manifold 7.

Separately the valve rod 22b and the 23b of aforementioned Aspirating valves 22 and outlet valve 23 connect cylinder head 5 and outstanding in valve arm chamber 20 upward.And valve rod 22b and 23b be respectively outer embedding spring 2727 in valve arm chamber 20, is pushed by this spring 2727, Aspirating valves 22 and outlet valve 23 are slided respectively upward and closes these Aspirating valvess 22 and outlet valve 23.

In addition, below aforementioned air-strainer 30, on a side of cylinder block 2, dispose the flywheel 41a on the end that is fixedly installed on crankshaft 10.On the peripheral part of the outside of flywheel 41a, fixedly install a plurality of blade 41b41b ..., by these blades 41b41b ... constitute fan 41, this fan 41 is covered by blower-casting 45.And, cool off giving cylinder block 2 and cylinder head 5 etc. by the air in this fan 41 suction fan housings 45, simultaneously, give air-strainer 30, be inhaled into as the air of burning usefulness.The air of this burning usefulness, by the intakeport 5a that is inhaled into cylinder head 5 after air-strainer 30 purifications, the Aspirating valves 22 that is configured below this intakeport 5a is supplied with firing chambers 19.

Below, add that Fig. 4 describes air-strainer 30 of the present invention.

Air-strainer 30 is made of main body 31, cover body 32 and parts 33 etc.Cover body 32 is fixedly installed on the main body 31 through sealing component 34, storage member 33 between this cover body 32 and main body 31.Form the recess 31c suitable mutually on the inner side step shape ground of main body 31 with the peripheral shape of parts 33.Parts 33 clamp and are fixed on the main body 31 in sealing component 39 is engaged in this recess 31c and with stone bolt 35 and nut 36.Then, with nut 37 cover body 32 is fixed on the main body 31.

That is to say, 3 segmentation ground form the recess 31b31c31d that volume slowly increases on the inner face of main body 31, wherein, interior all shapes of the recess 31c of central authorities are roughly consistent with the peripheral shape of parts 33, only by component 33, promptly parts 33 can be remained on this recess 31c, it is not come off.The recess 31b of the minimum of bottom side forms the space between the bottom of main body 31 and parts 33, simultaneously, and at central part formation inlet hole 31e and the pass through path of this inlet hole 31e as air.In addition, the recess 31d of the maximum in the outside forms the space and constitutes between in the periphery of parts 33 and main body 31 inner faces and cover body 32 and sucks the space.

And, foot bolt 35 regularly after forming internal thread part 31f and precession on the center bottom of main body 31, parts 33 with when aforementioned recess 31c cooperates, make stone bolt 35 run through the central authorities of the cover 38 in the outside that is arranged on parts 33, fix parts 33 by tightening nut 36.Have, the outside periphery the peripheral part end of cover body 32 embedding main body 31 makes cover body 32 coating members 33 again, and the bolt hole that aforementioned stone bolt 35 is connected at the outside of this cover body 32 central opening tightens nut 36 at this stone bolt 35 and fixes cover body 32.

So, because the inboard in main body 31 is provided with the recess 31c that is consistent with the peripheral shape of parts 33, so go forward in that parts 33 usefulness stone bolt 35 and nut 36 are anchored on this main body 31, can easily remain on recess 31c to parts 33 and go up and position.Thus, can prevent the assembly defect of parts 33, simultaneously can be simply and promptly assemble air-strainer 30.

In addition, air-strainer 30 is configured in the top of blower-casting 45, bottom in the main body 31 that constitutes this air-strainer 30, be provided with towards the suction port 31a of blower-casting 45 inner openings, that is, as suction port, the peripheral part of sidepiece and bottom contacts and is closed with cylinder block 2 central part for blower-casting 45, the opening portion of opening upward is set on top, seals with the main body 31 of air-strainer 30 on every side.And, being communicated with air-strainer 30 bottoms and blower-casting 45 tops by suction port 31a, can suck the cool air of blower-casting 45 sides in the air-strainer 30 from this suction port 31a.

Because this structure, the suction port of the extraneous gas of blower-casting 45 have concurrently motor 1 cooling air inlet effect and suck the effect of the suction port of combustion airs to air-strainer 30.Promptly, for example, in the housing of sealing, wait the occasion (occasion of the motor of sound insulation type) of configuration motor 1, because suction port can only be provided with one, so the design of air-breathing stream becomes easily, in the place that can supply with the cool air that cleans most suction port is set and becomes easy.

In addition, owing to can directly import air-strainer 30 to the air in the blower-casting 45, so can unify suction system and make compact structure.And, owing to, can suck few air such as dust in the air-strainer 30, so can seek the long lifetime of parts 33 by the air in the suction fan housing 45 is imported air-strainer 30.Promptly, the occasion that the place is many places of dust etc. that is provided with at motor, as original, when the suction port of blower-casting and air-strainer is different structure, must has filter separately etc. at each suction port, and must carry out the replacing of filter etc. continually, if but adopt structure of the present invention, because suction portion is 1 place, so the position that is provided with of filter etc. gets final product with a place, can reduce the part replacement of air-strainer 30.

Have again, in the occasion of the motor of common motor or sound insulation type etc., owing to can use common air-strainer, so can reduce its kind and reduce cost.

In addition, as shown in Figure 5, in air-strainer 30, on the position relative, barrier 46 is set with suction port 31a.This barrier 46 is configured between suction port 31a and the parts 33.That is,, meet this barrier 46 backs and disperseed and directly do not run on the parts 33 relative, be guided to that to spread all over parts 33 all with suction port 31a from suction port 31a inhaled air.

In original air-strainer, has the tendency that only air is inhaled on the part relative with the suction port of parts, a part of variation of early stage parts, thereby cause the replacing time of parts to shorten, but as of the present invention,, can avoid air to suck to the deflection of parts by on the position relative, barrier 46 being set with suction port 31a, part that can a plug members 33 or be a part of variation can be sought the long lifetime of parts.Barrier 46 is bigger than suction port 31a, forms with the curved surface of the concentric circular arc of parts 33 and is configured in the outside of parts 33.

Then, the structure to the main body 31 of air-strainer 30 describes.

As Figure 6 and Figure 7, such wall portion below on the main body 31 of air-strainer 30, forming.Promptly, form from the along continuous straight runs of intermediate portion up and down of main body 31 the 31g of wall portion that (cylinder head 5 sides) laterally extend in cylinder head 5 sides, be connected with the 31g of this wall portion and from the 31h of wall portion of both sides, bottom (cylinder head 5 sides) extension laterally of main body 31, see from the bottom surface that from the bottom of the opposition side of the cylinder head side of main body 31 roughly U font ground is to the 31i of wall portion of downside (blower-casting 45 sides) extension, by the 31g of these wall portions, 31h, 31i, make from the air of fan 41 from the upper guide of blower-casting 45 to cylinder head 5 sides.So, because the 31g of wall portion, 31h, 31i be formed on the main body 31 and play the effect of baffle, so do not need to be provided in addition can reduce cost baffle from air guide cylinder head 5 sides of fan 41.Be formed on 31g of wall portion and the 31h that main body 31 is installed in bolt hole on the cylinder head 5.

In addition, air-strainer 30 is according to the field of employment of motor 1, and not only the air in the suction fan housing 45 also is formed on suction unit on the cover body 32, thereby can suck extraneous gas from this suction unit.

That is to say that as shown in Figure 6, in the edge portion of the suction port 31a of aforementioned body 31, it is the shape of " コ " font that the groove 31j that sees recess shapes from behind forms from the plane.This slot part 31j, as open sides, the width ground, front and back that spreads all over suction port 31a forms in the horizontal direction cylinder head side.And, on this slot part 31j, can insert bigger flashboard 40 slidably from the cylinder head 5 side direction outsides than suction port 31a.So, as required,, can seal the air that suction port 31a and cut-out are advanced from blower-casting 45 side direction air-strainer 30 side draughts by flashboard 40 is inserted the line slip of going forward side by side in the slot part 31j.

And the suction unit that forms on the cover body 32 of air-strainer 30 for example, has Fig. 8 or structure shown in Figure 9.That is,, can directly suck extraneous gas in the air-strainer 30 by changing aforementioned cover body 32 and suction unit 42a43a being arranged on the cover body 42 (Fig. 8) 43 (Fig. 9) of sidepiece.The suction unit 42a43a of these cover bodies 4243, near and be arranged on the side of up and down or left and right of cover body 4243 side separately.For example,,, after unloading lower nut 37 and unloading lower cover 42, change installation direction by returning turnback from state with figure (a) in the occasion of cover body shown in Figure 8 42, shown in figure (b), can about change the direction of suction unit 42a on the contrary.In addition,, similarly, change installation direction, shown in figure (b), can change the direction of suction unit 43a up and down on the contrary by making 43 times turnbacks of cover body from state with figure (a) in the occasion of cover body shown in Figure 9 43.

As mentioned above, cover body 4243 is made the front see that (right side among Fig. 4 is as the front) is the shape of regular polygon (n dihedral), can fix its central authorities with stone bolt 35 and nut 37, by on the one sidepiece, suction unit being set, can turning round predetermined angular (360/n degree) to cover body and change installation direction.Thus, can change the direction of suction unit.In addition, owing to can make opposite direction to the position of suction unit by the installation direction of cover body, so, can easily carry out the specification change of motor.In the present embodiment, cover body is done quadrate, install with turning 90 degrees, also can return the suction direction of change extraneous gas at every turn with turning 90 degrees by cover body is returned at every turn.

In addition, as shown in Figure 4,, that is,, form the sucking pipe 31k of the tubulose that extends to cylinder head 5 sides in the substantial middle portion of cylinder head 5 sides at the rear portion of main body 31 (parts 33 sides, the right side among Fig. 4 as the place ahead).And, the front end of sucking pipe 31k can be linked to each other with the intakeport 5a of cylinder head 5, thereby sucking pipe 31k is communicated with intakeport 5a.So, air-strainer 30 and intakeport 5a are connected and constitute the inlet passage that enters the air of intakeport 5a from air-strainer 30.Have, the periphery of sucking pipe 31k becomes the part of the 31g of aforesaid wall portion again.

Like this, because the main body 31 of sucking pipe 31k and air-strainer 30 constitutes integratedly,, can reduce part number and also can reduce cost so do not need sucking pipe is installed on air-strainer as in the past.Have again,, can make simply with die casting or injection-molded moulding etc., so can reduce cost owing to comprise the main body 31 of sucking pipe 31k.In addition, can shorten the width (sucking pipe direction) of air-strainer 30.Thus, constituting the occasion of air-strainer 30 with original size, owing to can shorten the part of main body 31 to 33 increases of parts, so can seek the long lifetime of parts 33.

Have again, because main body 31 is with two part mould and moulding, simultaneously, at tight its two molds of contact of suction port part, so the suction port 31a that is arranged on the main body 31 becomes right angle orientation with respect to the withdrawing pattern direction.For this reason, can easily make main body 31 moulding by aluminium die casting.In addition since with can moulding suction port 31a moulding main body 31 time by mold, so, can save hole processing, can reduce cost.

In addition, connect aforementioned sucking pipe 31k and the inlet hole 31e of opening, form the elongated shape of intakeport 5a.That is, in the side-looking section shape of inlet hole 31e and intakeport 5a, make the inclination of inwall up and down of intakeport 5a roughly consistent with the inclination of the inwall up and down of inlet hole 31e, separately face also unanimity roughly of section shape.So, there is not step difference at the inlet passage that enters the air of intakeport 5a from inlet hole 31e.Therefore, can successfully carry out from air-strainer 30 through inlet hole 31e can preventing from inlet passage, to produce turbulent flow, so can stably supply with intakeport 5a to air from air-strainer 30 to the flowing of the air of intakeport 5a.For this reason, the resistance force diminishes on the sucking pipe part of the air that imports from intakeport 5a can help the eddy current (vortex) that forms at air when the valve opening of Aspirating valves 22 flows in the cylinder 2a.

That is to say, especially in the such diesel engine of motor of the present invention 1, in order to make fuel perfect combustion in the short time, mixing air and fuel well.For this reason, motor is designed in the firing chamber to produce the vortex (eddy current) of air Mixture combustion gas etc.

Especially, intakeport is made the shape of having a mind to generate eddy current, as not hindering air-flow ground to produce the method for strong eddy current as far as possible, has developed and with the firing chamber intakeport has been set prejudicially and at the method for the design of the shape of valve.Therefore, in the present invention,, also descended the time for the shape that is formed on the intakeport 5a on the cylinder head 5 in order to help the generation of this eddy current.

As shown in figure 10, on top plan view, on cylinder head 5, on fore-and-aft direction, dispose Aspirating valves 22 and outlet valve 23, in the occasion that disposes these Aspirating valvess 22 and outlet valve 23 with respect to the cylinder axis of cylinder 2a to the right prejudicially, the position of these Aspirating valvess 22 and outlet valve 23 and intakeport 5a relation is configured to center with respect to cylinder liner 17 the left and right sides of Aspirating valves 22 opposition side (being the left side (upside among the figure) of body left and right directions in the present embodiment).And, the intakeport 5a that on cylinder head 5, forms, formation enters the vortex-like passage shape of crooked to the right back towards the center of the Aspirating valves 22 of the below that is configured in intakeport 5a from the left side.The part that is equivalent to this path outside, that is, the section shape of overlooking of the inwall in the outside of intakeport 5a (inner face) 5c is made from the shape of plan view near the tangent line t direction in week in the cylinder liner 17.In other words, from the inlet of intakeport 5a to cylinder liner 17 cylindraceous in intersect in week before, make the shape of the inwall 5c in the outside near the circular shape (circumferential shapes) of cylinder liner 17 as far as possible and connect sleekly.And the shape of the inwall 5c after inwall 5c intersected with 17 interior weeks of cylinder liner is connected with the periphery circle s of Aspirating valves 22 sleekly from top plan view.Have again, by inwall 5c being made and the slick and sly parabolic curve that is connected of periphery u by the valve opening of Aspirating valves 22 switches, the integral body of inwall 5c forms gyrate curve, and make shape, and intakeport 5a is configured on the cylinder head 5 with intakeport of holding the width that can suck enough air quantities.

Because by intakeport 5a is made this shape and configuration, can flow into by resistance in the outside air of intakeport 5a, so the quickening of the flow velocity of the air in the outside minimumly.Thus, become big, be easy to generate the vortex of air-flow in the difference of the flow velocity of the inboard of intakeport 5a and outside inhaled air.That is, because the shape of such intakeport 5a is easy to generate aforesaid eddy current, thus, air and fuel can mix well, thereby promote burning.

Below, with Figure 11 to Figure 14 air-breather 50 of the present invention is described.

On the valve arm chamber 20 above the cylinder head 5, such as described above, on the intakeport 5a of aforementioned valve arm housing 21 side (being the right side of Fig. 3 in the present embodiment) top, and valve arm housing 21 is provided for adjusting the air-breather 50 of the pressure between this valve arm chamber 20 and the extraneous gas pressure integratedly.

This air-breather 50 is communicated with machine atmosphere outward, pressure in the valve arm chamber 20 are not increased or reduce, the part of this air-breather 50 becomes such structure, by preventing that with valve arm housing 21 being used to of being provided with integratedly the one-way valve 51 of adverse current from discharge air, this air is discharged from the exhaust port 57 that forms at valve arm housing 21 by the circulation flow path 52 of going back of air-breather, returns intakeport 5a by the path 44 that forms on cylinder head 5.

Inside in this valve arm chamber 20, the lubricant oil of the dispersing upper end portion that is used for being contained in lubricated Aspirating valves 22 in the valve arm chamber 20 and outlet valve 23 and valve arm 2526 etc.Turn back in the crank box 3 as liquid in order to make this become vaporific lubricant oil, on the periphery of the vent 56 of the inlet that becomes air-breather 50, baffle plate 53 is set integratedly with valve arm housing 21.Promptly, by this baffle plate 53 is set, when pressure in the valve arm chamber 20 is released, when the pressurized gas in the valve arm chamber 20 enter vent 56, after vaporific lubricant oil is run into baffle plate 53, attached thereto, fall after little particle grows into liquid attached to the lubricant oil on this baffle plate 53, turn back in the crank box 3 by push rod chamber etc.

Around the bottom that spreads all over vent 56 full week the baffle plate of this effect has been set the time, when lubricant oil stores more for a long time in valve arm chamber 20 or tilts and when pasta is risen at body, this baffle plate often plays a part suction pipe, and lubricant oil is intactly drunk up.In addition, constitute said baffle 53 by board 53a and board 53b.These boards 53a and board 53b, on the direction of approximate vertical separately the mutual empty standard width of a room in an old-style house of front end every, and form, and be provided with highlightedly in the mode of surrounding the vent 56 that is communicated with one-way valve 51 with valve arm housing 21.That is, between board 53a and board 53b, the slit 54 of the open above-below direction in below is set.But this slit 54 also can be arranged between the sidewall of board 53a and board 53b and valve arm housing 21.

So, by on baffle plate 53, forming slit 54, as shown in figure 13, even because the liquid level of lubricant oil rises near the lower end of baffle plate 53 or motor 1 body vibration or motor 1 lift-launch shaken when Trolley is first-class.And the lubricant oil that are stored in the valve arm chamber 20 are positioned at more than the position of lower end of baffle plate, because air is discharged from this slit 54, be inhaled in the one-way valve 51 so can prevent the lubricant oil that are stored in the valve arm chamber 20.That is, just can not prevent the intrusion of lubricant oil, can prevent of the generation of this lubricant oil, can improve venting quality because of the exhaust ejection of a variety of causes generation to one-way valve 51 sides as long as lubricant oil is not full of in the valve arm chamber 20.In addition, because aforementioned slots 54 moulding simply, punching is not set in addition replaces slit 54, can obtain aforesaid effect with simple structure so do not need to process etc. with boring.

Then, the structure to starting aid injection of the present invention portion 60 describes.

This starting aid injection portion 60 is used to inject the part of carrying out the starting aid oil of engine start when being used for low temperature smoothly, as Fig. 3 and from Figure 11 to shown in Figure 13, be arranged on integratedly on the end of aforementioned valve arm housing 21 with valve arm housing 21.

Starting aid injection portion 60 is communicated with aforementioned intakeport 5a, and from the oil that the inlet 61 that starts aid injects, the injection path 62 that connects by the path 44 with formation on cylinder head 5 splashes into intakeport 5a, and 5a enters firing chamber 19 from this intakeport.Thus, the volume in the firing chamber 19 has reduced the part of the oil that drips and improved the compression ratio of mixed gas, and is easy thereby the starting of motor becomes.Have again, in aforementioned inlet 61, be inserted with lid 64 when injecting the starting aid, prevent to sneak into from the outside foreign matter.

In addition, when injecting the starting aid, aforementioned injection path 62 form restriction 65 with the portion 62a of accumulating midway, make the above oil of established amount inject firing chamber 19 and do not produce the oil hammer that becomes high pressure because of superfluous.That is, owing to what inject path 62 restriction 65 is set midway, the oil that injects from inlet 61 before entering this restriction 65, is formed at the funnelform collection that injects on the path 62 and deposits the 62a of portion in case be stored in, later on will be with under the suitable minim.

Owing to make this structure, when injecting starting aid oily, the injection amount by being arranged on the restriction 65 volitional checks starting aid that injects on the path 62 can stop excessively to enter.In addition, because the injection amount of starting aid is limited and very slow the injection, so,, can prevent that a large amount of oil is inhaled in the firing chamber 19 quickly and produces and overflow and the oil hammer phenomenon even general user etc. also can the limits confirmed that with eyes the injection amount marginal not goes into.

Have, aforementioned air-breather is circulation flow path 52 and the injection path 62 that starts aid also again, exhaust port is separately made the common exhaust port 57 that forms on valve arm housing 21.Promptly, air-breather 50 and starting aid injection portion 60 are arranged on the intakeport 5a side (upside of Figure 11) of valve arm housing 21, air-breather also circulation flow path 52 is formed on the valve arm housing 21 respectively integratedly with the injection path 62 that starts aid, becomes the structure that is communicated with an exhaust port 57.

Because such structure, in valve arm housing 21, because can centralized configuration air-breather 50 and starting aid injection portion 60, so can reduce number of spare parts and seek the simplification of the reductionization and the manufacturing procedure of cost, simultaneously, can seek save spaceization.

As mentioned above, the superstructure of motor of the present invention, can be widely applicable for motor, wherein this motor has the air-strainer of the air of the firing chamber that purifies supply engine, perhaps have the top that is arranged on valve arm chamber air-breather, be used for successfully carrying out the starting aid injection portion of starting aid of the startup of motor when being used to inject low temperature.

Claims (15)

1. the superstructure of a motor, side at motor is provided with fan, covers this fan by blower-casting, near configuration air-strainer this blower-casting, it is characterized in that, the suction port towards aforementioned blower-casting inner opening is set on the main body of this air-strainer.

2. the superstructure of motor as claimed in claim 1 is characterized in that, the barrier that disperses inhaled air is set on the position relative with aforementioned suction port.

3. the superstructure of motor as claimed in claim 1 is characterized in that, aforementioned air-strainer is configured in the sidepiece of cylinder head, simultaneously, on the main body outside of air-strainer, forms towards the wall portion that cylinder head side erects.

4. the superstructure of a motor in the suction side of motor, is provided with the air-strainer with main body and cover body storage member, it is characterized in that, the recess that is consistent with the peripheral shape of above-mentioned parts is formed on the inboard of aforementioned body.

5. the superstructure of a motor in the suction side of motor, is provided with the air-strainer with main body and cover body storage member, it is characterized in that, on a side of aforementioned cover body suction unit is set, and simultaneously this cover body is made regular polygon.

6. the superstructure of a motor is installed air-strainer on the intakeport of the cylinder head of motor, it is characterized in that, the sucking pipe that is communicated with aforementioned intakeport is formed on the main body of aforementioned air-strainer.

7. the superstructure of motor as claimed in claim 6 is characterized in that, be provided with on the aforementioned body be positioned at aforementioned air-strainer near the suction port that is communicated with of blower-casting.

8. the superstructure of motor as claimed in claim 6 is characterized in that, forms the wall portion of edge-on of near aforementioned air-strainer fan hub side and motor in the outside of aforementioned body.

9. the superstructure of motor as claimed in claim 6 is characterized in that, with two casees casting mold moulding aforementioned body, simultaneously, moulding is arranged on the suction port on the main body by two molds are closely contacted, and makes it to become the direction vertical with the withdrawing pattern direction.

10. the superstructure of motor as claimed in claim 6 is characterized in that, the inlet hole of aforementioned sucking pipe is made the elongated shape of the intakeport of aforementioned cylinder head.

11. the superstructure of a motor is provided with air-breather on the top of valve arm chamber, it is characterized in that, around the vent of the indoor air-breather of aforementioned valve arm baffle plate is set, and the slit of the below of open this baffle plate is set simultaneously.

12. the superstructure of motor as claimed in claim 11 is characterized in that, on the valve arm housing of aforementioned valve arm chamber, constitutes going back circulation flow path and starting aid injection path of aforementioned air-breather integratedly.

13. the superstructure of a motor is provided with air-breather on the top of valve arm chamber, it is characterized in that, when being communicated with the going back circulation flow path and starting aid and inject path of aforementioned air-breather, on this starting aid injection path restriction is set.

14. the superstructure of motor as claimed in claim 13 is characterized in that, constitutes aforementioned circulation flow path and the aforementioned starting aid injection path gone back on the valve arm housing of aforementioned valve arm chamber integratedly.

15. the superstructure of a motor, intakeport in the cylinder head on the top that is arranged on the coating gas cylinder body sucks air, be configured aforementioned intakeport in aforementioned cylinder head below Aspirating valves this air is supplied with the firing chamber, it is characterized in that, the outside inner face of aforementioned intakeport is made from the shape of plan view near the tangent direction of the cylinder liner in the cylinder block.

Images