CN2334878Y - Two-stroke engine with crankcase pressure isolator and straight line type waste gas exhausting - Google Patents

Abstract

The utility model relates to a two-stroke engine with a crankcase pressure isolator and for exhausting waste air in a straight line type, which comprises a cylinder body, wherein a crank case is connected to the lower part of the cylinder body, a piston and a connecting rod are arranged in the cylinder body, and a sealed separating sheet is arranged between the bottom of the cylinder body and the crank case. A neck sleeve is arranged on a position where the connecting rod passes through the separating sheet. An oil seal ring sleeve which is sheathed on the connecting rod is arranged in the neck sleeve. A sleeve barrel is sheathed outside the neck sleeve and is fixedly connected with the separating sheet. The utility model has the advantages of bigger horsepower, simple structure and less pollution.

Description

The two cycle engine that crankcase pressure obstructing instrument and linear type waste gas are got rid of

The utility model relates to the two cycle engine of a kind of crankcase pressure obstructing instrument and the eliminating of linear type waste gas.

Vehicle such as automobile, motorcycle with people's life and production the inseparable relation of work is arranged, yet topmost heart partly is exactly the engine part of automobile in automobile, motorcycle, can not explain so the practicability of car engine is not sayed as the traffic tool.

Two cycle engine all adopts the exhaust scavenge system of connection ring now, and its air inlet is to be got by the crankcase pressurization, and the gas that enters is to be controlled by one of following manner: leaf valve or rotary valve;

Its exhaust ports of plate valve that is assembled in crankcase wall is equipped with rotary valve pulsation in order to the adjusting waste scavenging in specific engine range of revolution, so as to improving air-breathing efficient, most two cycle engine all uses vapour/machine oil mixture, its ratio is about 20: 1, each partly can be lubricated to make engine, this lubricating system makes two cycle engine have the unclean problem of burning, recently the effort of doing for peace and quiet two cycle engine comprises the lubricating fitting of direct injection or separated type etc., but, because air inlet still can be flow through crankcase and by the machine oil particle pollution, and fail to be improved fully, in order to overcome the problem of supplying with air inlet through crankcase, thereby develop outside air supply system, for example: pressurized machine, turbosupercharger, the piston cylinder combination of secondary etc., though these outside plenum systems can make the air that sucks engine become comparatively clean, because of air can not pass through crankcase, its structure very complexity also is its shortcoming; Its another one shortcoming is: the horsepower of two cycle engine is comparatively limited, and desire the lifting of two-stroke horsepower comparatively is difficult for also is its shortcoming;

Therefore, above-mentioned traditional two cycle engine has the necessity that is improved in fact.

This creator promptly is at the shortcoming of above-mentioned traditional two cycle engine structure and deep design, and the road of active research improvement, through long-term effort, study and develop, design the utility model.

The purpose of this utility model, be to provide the two cycle engine of a kind of crankcase pressure obstructing instrument and the eliminating of linear type waste gas, mainly be to preserve the simple advantage of two cycle engine inherent structure, by means of separating with a partition between cylinder bottom and the crankcase and sealing, this baffler is to the connecting rod of reciprocating round or square, sealed with circular or square neck cover, while also makes this neck cover can do transverse movement, to match with the angular motion of connecting rod, the utility model and to have horsepower big and can reduce the advantage of pollution is rated as one progressive, practical novel designs.

The technical solution of the utility model is to provide the two cycle engine of a kind of crankcase pressure obstructing instrument and the eliminating of linear type waste gas, comprise cylinder block, cylinder block inside is provided with cylinder wall and ventilating hole, the cylinder block top is provided with the lining of longitudinal crossing cylinder block, the cylinder block bottom is connecting crankcase, be provided with piston and connecting rod in the cylinder block, the cylinder block bottom is provided with breather cheek valve, its top is provided with the air outlet, it is characterized in that: between cylinder block bottom and crankcase Packed partition is set, this connecting rod passes this partition place and is arranged with the neck cover, is provided with an oil seal ring cover and is set on the connecting rod in the neck cover, a sheathed sleeve outside the neck cover, sleeve and partition are fixedly connected.

The two cycle engine that described crankcase pressure obstructing instrument and linear type waste gas are got rid of is characterized in that:

The one partition obstruct casket with trough shaped void is set between cylinder block bottom and crankcase, and this partition is arranged in the trough shaped void of partition obstruct casket, intercepts between casket and the resistance sheet at partition and is provided with oil seal ring, and partition can intercept horizontal slip of the inner work of casket in partition;

In the two cycle engine of above-mentioned crankcase pressure obstructing instrument and the eliminating of linear type waste gas, air inlet can make air inlet enter the space of piston bottom through one-way valve or other porthole modes and partition is compressed, this compressed air by vent slot upwards to reach the firing chamber on piston top;

And the air inlet of having compressed can the straight line mode of making progress expel waste gas that it is discharged outside to through top rotary valve regularly;

The utility model compared with the prior art advantage and good effect is very obvious.By above technological scheme as can be known, the utility model have at least as after advantage:

(1). horsepower is big: the utility model can divide into upper and lower two partly with engine by partition, and the pressure of engine internal is increased, and the horsepower of engine output is promoted.

(2). pollute low: because of the utility model when the air inlet, ozone need not pass through crankcase, can not be subjected to the oil pollution in the crankcase, so have the lower advantage of pollution level.

(3). simple in structure: the utility model is with under the very simple spatial structure kenel, can reach creation purpose described in the utility model.

Further specify specific structural features of the present utility model and purpose below in conjunction with accompanying drawing.

Brief Description Of Drawings:

Fig. 1 be A type engine cylinder body of the present utility model in conjunction with sectional view.

Fig. 2 is the utility model piston when 85 ° of crankcases, the A type engine cylinder body that rotary valve 4 is opened in conjunction with sectional view.

Fig. 3 is that the utility model piston is positioned at bent axle and locates for 221 °, and suction port closes, and relief opening closes, the A type engine cylinder body of commencement of fuel injection in conjunction with sectional view.

Fig. 4 be the utility model Type B engine cylinder body of not having piston in conjunction with sectional view.

Fig. 5 be the utility model piston Type B engine cylinder body of being positioned at upper dead center position in conjunction with sectional view.

Fig. 6 be the utility model piston C type engine cylinder body of being positioned at upper dead center position in conjunction with sectional view.

Fig. 7 be the utility model D type engine cylinder body of not having piston in conjunction with sectional view.

Fig. 8 is that the utility model piston is positioned at bent axle and locates for 80 °, the D type engine cylinder body that rotary valve 4 is opened in conjunction with sectional view.

Fig. 9 is the planimetric map that partition of the present utility model blocks pattern.

Figure 10 is that partition of the present utility model blocks the pattern cross-sectional view.

Figure 11 is the stereogram that partition of the present utility model blocks pattern.

Figure 12 is the stereogram that another kind of partition of the present utility model intercepts casket.

Figure 13 is the stereogram of square connecting rod of the present utility model.

Figure 14 is the sectional drawing of another kind of partition pattern of the present utility model.

Figure 15 is that another kind of partition pattern of the present utility model is when the sectional drawing of connecting rod when the angular orientation is arranged.

Figure 16 is the planimetric map of flexible partition of the present utility model.

Figure 17 is the planimetric map of flexible partition of the present utility model.

Figure 18 is the sectional drawing of the axial flexible partition of Y-Y of the present utility model.

Figure 19 is the sectional drawing of the axial flexible partition of Z-Z of the present utility model.

Figure 20 is the planimetric map of flexible partition of the present utility model.

Figure 21 be rotary valve of the present utility model system in conjunction with sectional view.

Figure 22 be lining of the present utility model in conjunction with sectional view.

Figure 23 is that the rotary valve of axially open of the present utility model is in conjunction with sectional view.

The utility model is the two cycle engine that a kind of crankcase pressure obstructing instrument and linear type waste gas are got rid of, as shown in Figure 1, its be first kind of kenel A type engine in conjunction with sectional view, wherein the inside of cylinder block 1 includes the ventilating hole 11 of cylinder wall 10 and unlatching, the top of cylinder block 1 includes the lining 3 of longitudinal crossing cylinder, cylinder deck and crankcase 30,40 are divided into upper and lower two partly with a narrow narrow space region, have a partition and intercept casket 22 between upper and lower two parts.

Please referring to shown in Fig. 2, when piston 12 is 85 ° because of blast runs to bent axle down, rotating speed be half rotary valve 4 of bent axle open so that waste gas can be rapidly outlet 5 places by rotary valve inside discharge towards the outside, connecting rod 13 is with slidably partition 20a encirclement, have the circular oil sealing and the spherical axle collar on the partition 20a, this slidably the partition system can make connecting rod 13 do angled motion, and can between suction port below the piston and crankcase, produce pressure drag every, in crankcase 30, lubrication system in 40 is dried groove or wet sump system commonly used, inhaled air is entered by shell fragment valve 7, thereby can not be subjected to being positioned at the pollution of the inner machine oil of crankcase, air can very clean and not with fuel mix, fuel is that the pulse mode with accurate control sprays into through nozzle 6, after ventilating hole 11 and rotary valve 4 are all closed, see also Fig. 3, piston is in 221 ° of positions of bent axle, the fuel that sprays into can sweep away through the piston head of high temperature, fuel is gasified rapidly, discharge by relief opening to prevent unburned fuel oil particle.When piston descends again, the new suction in the fresh air of piston base compressed between partition obstruct casket 22, its compression ratio can reach 2: 1 ratio or higher, approximate general two cycle engine exhaust greatly and remove four to five times of pressure, the air inlet of this high pressure is exceedingly fast because of speed, tolerable needn't be too wide along the ventilating hole of top by piston week, these straight formula ventilating holes 11 are narrow groove shape, be uniformly distributed in cylinder wall around, so can obtain evenly, effectively, air at a high speed enters the firing chamber, this high-speed air from the four directions impacts mutually in the piston tip center portion, form an eddy flow that rises, and rapidly waste gas is discharged from exporting 5, because all lubricant oil all are controlled in the crankcase, so can not pollute the mixture of air and fuel oil, cylinder wall and piston then adopt the material of selflubricating formula to add the oil film of fuel evaporation, lubricated purpose can be reached, required requirement should be reached with the alloy of the metal model that obtains to prove and new-type surface treatment method.

Again as shown in Figure 4, the Type B engine that is second kind of kenel is in conjunction with sectional view, include cylinder wall 10 and vent slot 50, this air grid in cylinder block becomes narrow ventilating hole, the through top position that intercepts casket 22 to partition, this Type B engine has smooth cylinder wall, narrow air grid and several are only arranged for machine oil evaporation aperture 26 on it, this machine oil evaporation aperture 26 is supplied with the lubricated piston 27 that gives interlayer of pulsed, these machine oil evaporation apertures 26 link to each other with the machine oil vent slot 25 of ring-type and send the machine oil groove back to, two-sided piston, as Fig. 5, sealed piston ring 27a is respectively being arranged up and down, 27b, the top of piston and base plate are to have the structure of purlin to link and become the support of piston tip with tubulose, the top of piston 27 and the space of bottom are sealed with the flexible sleeve pipe of cutting apart 28, and fix by the edge of the eaves on the piston, therefore make piston become even curface between the piston ring up and down, so that hold the machine oil steam of lubricated usefulness, the machine oil steam of this pulse is kept at up and down between the two-piston ring forever, and do not cause air inlet and firing chamber to be polluted by machine oil, the below inhaled air of piston 27 can intercept partition and be compressed, compression ratio can reach 6: 1 ratio, so piston itself becomes the pressurized machine of a positive displacement, when it breaks out stroke, the high pressure of this moment produces high airspeed, the time that sucks equals bent axle and rotates 82 °, therefore, can adopt extremely narrow vent slot 50, the engine of this Type B can use rock gas, because of must not leaning on the boil-off gas of gasoline, do not lubricate cylinder wall, this kind of engine when using gasoline or diesel oil because from the effect of engine supercharging, so horsepower that can be high and torsion are exported.

Again as shown in Figure 6, for C type engine of the present utility model in conjunction with sectional view, this structure is similar to the Type B engine, and difference is that rotary valve is a tubulose relief opening across the piston top, the body 36 of this rotary valve in the inner rotation of seal cartridge 35 and with bent axle with the speed rotation, other pistons and the suction stroke that links to each other are all identical with the Type B engine, do not repeat them here.

Again as shown in Figure 7, be the utility model D type engine in conjunction with sectional view, the tangent plane of cylinder block 1 comprises the firing chamber that cylinder wall 10 is constituted and the bottom 10a of casing wall, forms a bigger breathing space in the below of piston, has narrow vent slot 50 identical with C type engine in the cylinder block 10.

Fig. 8 represents that piston is a structure of two layers, comprise a top 125 and a larger-diameter base plate 125a, top board and base plate have the tubular body of purlin to link with one, while is the support piston tip also, the crankcase partition intercepts the pattern of casket, its structure is compressed inhaled air with aforementioned to partition, its compression ratio is about 6: 1, because its diameter of space of cylinder lower 10a is bigger, thus the space of institute's inhaled air can reach on the piston, therefore when the air of high speed enters the firing chamber, can obtain suitable pressurized effect, and when this pressurized machine situation took place, most time of the rotary valve of exhaust was for closing, only unlatching when the earliest 15 ° of crankshaft rotating.

For another example shown in the 9th, 10 figure, this connecting rod 13 is to be enveloped by 21 in the spherical neck cover of opening in a minute on Figure 10.This spherical neck cover 21 also comprises an oil sealing ring set 21a simultaneously, this spherical neck cover 21 swing in a sleeve 20, sleeve is then fixed with a resilient jump ring 20b, the sleeve 20 of this split and slidably partition 20a binding, partition then slides in the trough shaped void of partition obstruct casket 22, the top that partition intercepts casket has an oil seal ring 22a to be hidden among the groove available silica gel or equivalent material is made, this oil seal ring 22a contacts with the top of the partition 20a of slip, so that machine oil is kept in the crankcase.The stereogram of expression partition among Figure 11, among Figure 12 then expression intercept the another kind of structural design of casket 22, Figure 13 then represents structural design and the relevant neck cover 21 and the shape of slip partition sleeve 20 of another kind of square cross-section connecting rod 13a.

The another kind of structure of crankcase that intercepts is then by being represented among Figure 14 to the 20 figure.This kind obstruct mode is to adopt flexible partition 60 to resist the pressure that sucks air with its tension force, the structure of this partition can make connecting rod 13 swing generations that the stress of material is reduced to minimum, its structure be two halves separately or as the 20th figure in when assembling, on connecting rod, give combination, in conjunction with after be glued at the both sides of connecting rod neck cover again with two convex epitheliums 61, this partition must be made with special plastic materials, must the flexible pressure that bears simultaneously.

Characteristic of the present utility model is to be: the rotary valve 4 in engine top is a kind of very easy sealing, and minimum design rubs, shown in Figure 21, rotary valve 4 has comprised outlet 5, this otch crosses the center of cylinder shape valve, this valve body is with the speed rotation of bent axle 1/2, two ends then hold on bearing, when being applied to the cylinder engine of linear type, can use bearing to increase supporting in the centre, the employed material of rotary valve, be preferably the not stupalith or the metal sintering material of temperature influence, outsourcing is with columniform carbon material lining 3, this lining is available metal agglomerated material coating ceramic also, or carbonaceous composite material, to obtain the effect of engine selflubricating, this lining 3 has one to crack 303 along its central upper portion line, and overlap 304 both sides at the outlet neck, simultaneously also stationary bushing with rotation inhibiting, exhaust outlet 3a is arranged on the lining 3, and match with outlet 5 above the rotary valve 4, the outer shroud of exhaust outlet 3a is with compressible falope ring 301 and be stuck in the line of rabbet joint of carbonaceous seal cartridge outer, the pressure effect of outburst makes lining push down rotary valve and forms a SEALING FITTING 302, as shown in Figure 22, the outer of lining 3 may directly contact with the cooling water of engine when lining upwards contacts to rotary valve 4, contact the friction that produced to reduce with rotary valve 4 along the buffer space 300 that then leaves special shape in it, and the interior edge of lining does not need the oil film of lubrication oil gas generation can make between self-lubricating type pottery and the carbonaceous material to be lubricated.The space 300 of buffering has vent that the oil gas particle that overflows from SEALING FITTING 302 is discharged.

Again as shown in Figure 23, design for another kind of rotary valve, this valve only has an opening 308 and links to each other with pipe-type outlet 309, this kind rotary valve and bent axle rotate simultaneously, valve body 306 rings are identical with above-mentioned structure with circular lining 35, this lining 35 is inserted into lining on one side cutting apart valve body 306 with a keratotic plug 307 and is fixed on the cylinder block, and the rotary valve of this design is highly desirable to the four-stroke engine that is used for shown in Figure 23 with Figure 21, can replace camshaft and automobile door structure.

Claims (2)

1. the two cycle engine got rid of of crankcase pressure obstructing instrument and linear type waste gas, comprise cylinder block, cylinder block inside is provided with cylinder wall and ventilating hole, the cylinder block top is provided with the lining of longitudinal crossing cylinder block, the cylinder block bottom is connecting crankcase, be provided with piston and connecting rod in the cylinder block, the cylinder block bottom is provided with breather cheek valve, its top is provided with the air outlet, it is characterized in that: between cylinder block bottom and crankcase Packed partition is set, this connecting rod passes this partition place and is arranged with the neck cover, is provided with an oil seal ring cover and is set on the connecting rod in the neck cover, a sheathed sleeve outside the neck cover, sleeve and partition are fixedly connected.

2. the two cycle engine that crankcase pressure obstructing instrument according to claim 1 and linear type waste gas are got rid of is characterized in that:

One partition with trough shaped void is set between cylinder block bottom and crankcase intercepts casket, this partition is arranged in the trough shaped void of partition obstruct casket, intercepts between casket and the resistance sheet at partition and is provided with oil seal ring.

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