CN1018078B - Two stroke engine - Google Patents
Two stroke engineInfo
- Publication number
- CN1018078B CN1018078B CN88107889A CN88107889A CN1018078B CN 1018078 B CN1018078 B CN 1018078B CN 88107889 A CN88107889 A CN 88107889A CN 88107889 A CN88107889 A CN 88107889A CN 1018078 B CN1018078 B CN 1018078B
- Authority
- CN
- China
- Prior art keywords
- valve
- intake valve
- stroke engine
- cylinder head
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 34
- 238000010304 firing Methods 0.000 claims description 35
- 230000000994 depressogenic effect Effects 0.000 claims description 10
- 239000000446 fuel Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims 1
- 230000000873 masking effect Effects 0.000 abstract 1
- 239000000295 fuel oil Substances 0.000 description 17
- 230000002000 scavenging effect Effects 0.000 description 11
- 230000014509 gene expression Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000003921 oil Substances 0.000 description 5
- 239000002912 waste gas Substances 0.000 description 5
- 238000010926 purge Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Images
Classifications
-
- 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
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
-
- 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
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
A two-stroke engine having an intake valve and an exhaust valve which are arranged on the cylinder head. A masking wall is formed on the inner wall of the cylinder head to mask the valve opening between the valve seat and the peripheral portion of the intake valve, which is located on the exhaust valve side, for the entire time for which the intake valve is open.
Description
The present invention relates to two stroke engine.
In order in the firing chamber of known two stroke diesel engine, to realize good Schnuerle scavenging operation, when the valve lift of intake valve and exhaust valve all hour, be provided with the coverage wall, be used to cover between the valve seat of intake valve and peripheral part and be positioned at the valve openings of cylinder-bore axis side, meanwhile cover between the valve seat of exhaust valve and peripheral part and be positioned at the valve openings of cylinder-bore axis side.Suction port and relief opening are parallel to cylinder-bore axis and extend upward (seeing the open No.52-104613 of Japanese unexamined patent).In this two stroke diesel engine, the air that flows into the firing chamber from suction port flows towards piston-top surface along cylinder inner wall.Then, change, air is flowed to relief opening along cylinder inner wall, thereby realize the Schnuerle scavenging operation at the piston-top surface air-flow direction.
Yet, in this two stroke diesel engine, when the valve lift of intake valve and exhaust valve becomes big, valve openings between intake valve and its valve seat will be opened towards the firing chamber along the whole periphery of intake valve, and the valve openings between exhaust valve and its valve seat also will be opened towards the firing chamber along the whole periphery of exhaust valve.Consequently, the air that is positioned at the valve openings flow into combustor of cylinder-bore axis side from intake valve flows forward along the cylinder head inwall, and the valve openings by exhaust valve enters relief opening then.Therefore, in this two stroke diesel engine, because the portion of air of supplying with from suction port must be used to guarantee effective Schnuerle scavenging operation, so a problem that exists in this motor is to realize good Schnuerle scavenging operation.
The purpose of this invention is to provide a kind of two stroke engine that can realize good Schnuerle scavenging operation.
According to two stroke engine provided by the present invention, it comprises: an engine body, and it comprises a cylinder head with inwall; One can be in this body pistons reciprocating, limit a firing chamber between the inwall of this cylinder head and this piston-top surface: at least one is arranged on the intake valve on the cylinder head inwall; At least one is arranged on the exhaust valve on the cylinder head inwall; An and spark plug or oil nozzle that is arranged on the cylinder head inwall; It is characterized in that: be provided with mask between intake valve and exhaust valve, it is used for will being formed on all the time in the All Time that intake valve is opened between the valve seat of intake valve and the peripheral part and the valve openings that is positioned at exhaust valve one side is covered.
From down the description to most preferred embodiment of the present invention in conjunction with the accompanying drawings, present invention will become more fully understood.
In the accompanying drawings:
Fig. 1 is the sectional view of a two stroke engine;
Fig. 2 is the view of expression cylinder head inwall;
Fig. 3 is the sectional drawing of this cylinder head;
Fig. 4 is that expression intake valve and exhaust valve are opened the schematic representation of time;
Fig. 5 has schematically represented the valve lift of intake valve and exhaust valve and the variation in pressure in the relief opening;
Fig. 6 A and 6B are the sectional views of motor, the operational circumstances when they have represented the motor underloading;
Fig. 7 A and 7B are the sectional views of motor, the operational circumstances when they have represented the motor heavy duty;
Fig. 8 is another embodiment's of two stroke engine a sectional view;
Fig. 9 is the view of the cylinder head inwall of expression motor shown in Figure 8;
Figure 10 is the sectional view of motor, has represented the operational circumstances of Fig. 8 and motor shown in Figure 9;
Figure 11 is the bottom view of a two stroke diesel engine cylinder head;
Figure 12 is the sectional view of this two stroke diesel engine.
Referring to figs. 1 through Fig. 3, cylinder block of label 1 expression, one of label 2 expression can be cylinder block 1 in pistons reciprocating, cylinder head that is fixed on the cylinder block 1 of label 3 expressions, and label 4 is represented and is molded over the inwall 3a of cylinder head 3 and the firing chamber between piston 2 end faces.On the inwall 3a of cylinder head 3, form one towards the firing chamber 4 convex portions 5 that protrude, and this convex portion 5 extends along the whole diameter length of inwall 3a.As shown in Figure 1, convex portion 5 has and is essentially leg-of-mutton cross section, and individual peak ridge 5a is arranged in the lower end of its cross section.In Fig. 1 to Fig. 3, the root of convex portion 5 is represented by label 5b.Side at convex portion 5 is provided with a pair of intake valve 6, and is provided with a pair of exhaust valve 7 at its opposite side.
Convex portion 5 has individual middle body 5c, and this middle body constitutes a vault in the face of exhaust valve 7, and a spark plug 8 is arranged on intake valve one side of central vault part 5c.Therefore, spark plug 8 roughly is positioned on the cylinder-bore axis of intake valve one side that is in convex portion 5.On convex portion 5, form the coverage wall 10 that is used for each intake valve, so that cover between the peripheral part of valve seat 9 and intake valve 6 and be positioned at the valve openings of exhaust valve one side.These cover the peripheral part setting of wall 10 as close as possible corresponding intake valves 6, and extend along the peripheral part of corresponding intake valve 6, and its shape is consistent with the shape of the valve part of being covered.In addition, these coverage walls 10 expand to than the also low position of intake valve 6 that is in by the maximum lift position shown in Fig. 1 dotted line towards firing chamber 4.Therefore, between the peripheral part of valve seat 9 and intake valve 6 and be positioned at the valve openings of exhaust valve one side, when intake valve 6 is opened, cover by corresponding coverage wall 10 all the time.Owing between the root 5b of the peripheral part of exhaust valve 7 and convex portion 5, exist the fixed interval (FI), so, between the peripheral part of valve seat 11 and exhaust valve 7 and the valve openings that is positioned at intake valve one side can not cover by convex portion 5.Therefore, when exhaust valve 7 was opened, the valve openings between valve seat 11 and exhaust valve 74 was opened towards the firing chamber along the whole periphery of exhaust valve 7.
In cylinder head 3, form suction port 12 that is used for intake valve 6 and the relief opening 13 that is used for exhaust valve 7.Suction port 12 is for example linked to each other with an air-strainer (not shown) with a suction tude 15 by engine-driven mechanically driver type pressurized machine 14 by one, and suction tude 15 is provided with a throttle valve 16.Oil nozzle 17 is arranged on the upper wall of suction port 12, and the fuel oil with little scattering angle sprays from oil nozzle 17 with bar-shaped form, the shadow zone 18 of directive intake valve 6, as shown in Figure 3.Shadow zone 18 is positioned at spark plug one side of the axis of suction port 12, and for the straight line of the valve stem that passes two intake valves 6, is positioned in the face of spark plug 8 one sides.
Fig. 4 shows intake valve 6 and exhaust valve 7 is opened the example of time and the example of discharge time.In example shown in Figure 4, exhaust valve 7 is than intake valve 6 Zao opening, and exhaust valve 7 is than intake valve 6 Zao cutting out.In addition, injection time is set up after intake valve 6 is opened and commencement of fuel injection before piston 2 arrives bottom dead center BDC.
Fig. 5 shows the valve lift of intake valve 6 and exhaust valve 7 and variation in pressure P1, P2, Q1, the Q2 in the relief opening 13.The back will describe variation in pressure P1, P2, Q1, Q2.
With reference to the accompanying drawings 6 and Fig. 7 purge operation and hierarchical operations are described.Fig. 6 shows motor and is in the underloading working condition in when operation, and the working condition of Fig. 7 when showing motor and being in over-loading operation.In addition, the state when Fig. 6 (A) and Fig. 7 (A) show intake valve 6 and just opened, and Fig. 6 (B) and Fig. 7 (B) show the state that piston 2 is close to when arriving bottom dead center BDC.
At first purge operation and the hierarchical operations of motor when underloading is operated described with reference to Fig. 6.
When piston 2 moves downward and exhaust valve 7 when opening, the high-pressure gas in the firing chamber 4 flows into relief opening 13, and the pressure in relief opening 13 is a temporary transient positive pressure like this, as in Fig. 5 by P
1Shown in.This positive pressure P
1In the exhaust passageway of downstream direction, propagate, and be reflected at the joint of the exhaust passageway of each cylinder.Then, the next pressure of reflection is propagated to relief opening 13 heavily again with the form of vacuum pressure.Therefore, when intake valve 6 is opened, in relief opening 13, produce vacuum pressure, as in Fig. 5 by P
2Shown in.The length of exhaust passageway is depended in the timing that produces vacuum pressure.When being in the underloading serviceability when starting, firing pressure is low, therefore the positive pressure P that produces in relief opening 13
1With vacuum pressure P
2Also smaller.
When intake valve 6 was opened, the fresh air that contains fuel oil infeeded firing chamber 4 from suction port 12.At this moment, owing to cover wall 10, so fresh air and fuel oil mainly partly flow into firing chamber 4 by the valve openings that is positioned at that side relative with coverage wall 10 on the intake valve 6 for the valve openings of each intake valve 6 is provided with.In addition, when intake valve 6 is opened, owing in relief opening 13, produce vacuum pressure (as the P among Fig. 5
2Shown in), so under the effect of this vacuum pressure, the waste gas (combustion gas) that is arranged in 4 tops, firing chamber just is absorbed into relief opening 13.At this moment, as the arrow R among Fig. 6 (A)
1Shown in because this motion of waste gas, and fresh air and fuel oil are pulled to exhaust valve 7, fuel oil are incorporated into around spark plug 8(see Fig. 2 thus) the space in.When piston 2 further moves downward (shown in Fig. 6 (B)) so, the fresh air that contains fuel oil flows downward along the cylinder inner wall of intake valve 6 belows, as the arrow R among Fig. 6 (B)
2Shown in.But when motor was in the underloading serviceability, the amount of fresh air that infeeds firing chamber 4 was little, and fresh air to flow into the flow velocity of firing chamber 4 also little.Consequently, fresh air can not arrive the end face of piston 2, but be positioned at the top of firing chamber 4, therefore when piston 2 moves upward, because the mixture of air and fuel oil accumulates in the top of firing chamber 4, and residual unreacted fuel gas accumulates in the bottom of firing chamber 4, so, the inside of firing chamber 4 is by layering, so the mixture of air and fuel oil just can be lighted aptly by spark plug 8.
When motor is in the over-loading operation state, owing to firing pressure uprises, so the positive pressure that produces in relief opening 13 also uprises (Q in as Fig. 5
1Shown in), in addition, by positive pressure Q
1The vacuum pressure that produces of reflection also become greatly, as Q among Fig. 5
2Shown in.In addition, vacuum pressure Q
2Peak value at positive pressure Q
1Just occur after having produced one period short time.
When motor was in the over-loading operation state, the amount of fresh air that infeeds firing chamber 4 was big, and the speed that fresh air flows into firing chamber 4 also uprises.Therefore, when intake valve 6 was opened, a large amount of fresh airs that contain fuel oil were to flow into firing chamber 4 at a high speed.Then, the vacuum pressure Q that produces at relief opening 13 when the waste gas that is arranged in 4 tops, firing chamber
2Effect under when being inhaled in the relief opening 13, the middle part of the flow direction break-in firing chamber 4 of fresh air is as arrow S among Fig. 7 (A)
1And S
2Shown in.When piston 2 further moved downward, fresh air flowed downward along the cylinder inner wall of intake valve 6 belows so, and arrived the end face of piston 2, as arrow S among Fig. 7 (B)
3Shown in.Therefore, the unreacted fuel gas in the firing chamber 4 is little by little released and enters relief opening 13(shown in arrow T among Fig. 7 (B) by fresh air), thus in firing chamber 4, realize the Schnuerle scavenging operation.
In the two stroke engine that is equipped with above-mentioned intake valve and exhaust valve structure,, just can obtain the most effective scavenge effect by implementing a kind of like this Schnuerle scavenging operation.In addition, in this two stroke engine, the residual volume of waste gas is big, even in order also to obtain good igniting and combustion performance under the big situation of this waste gas residual volume, the mixture of air and fuel oil is assembled around spark plug, promptly obtained good layering.To embodiment shown in Figure 3, the structure of covering wall 10 makes it might stop the fresh air and the fuel oil that will flow into relief opening 13 mobile along the inwall 3a of cylinder head 3, consequently can realize good purge operation and well layering at Fig. 1.
In addition,, just can make the mixture of air and fuel oil trend towards assembling, so just might utilize the mixture of 8 pairs of air of spark plug and fuel oil to realize appropriate igniting around spark plug 8 by spark plug 8 being arranged on intake valve one side of convex portion 5.Specifically, the mixture of air and fuel oil trends towards accumulating in the central arched part 5c region surrounded by convex portion 5, because spark plug 8 also is arranged in this zone, so improved ignition performance thus.In addition, owing to be after fuel oil impacts the air door body ear end face of intake valve 6, to be fed to the firing chamber 4 at once and to be atomized from the fuel oil of oil nozzle 17 ejection, so fuel oil will can not adhere on the inwall of suction port 12.
Fig. 8 and Fig. 9 show another embodiment of two stroke engine, utilize this embodiment can realize better Schnuerle scavenging operation.In this embodiment, form a depressed part 20 on the inwall 3a of cylinder head 3, and intake valve 6 is arranged on the inner wall section 3b of cylinder head 3, this inner wall section 3b constitutes the bottom of depressed part 20.Except depressed part 20, the inner wall section 3c of cylinder head 3 is flat basically, and on this inner wall section 3c exhaust valve 7 is being set.The inner wall section 3b of cylinder head 3 and 3c are by peripheral wall 21 interconnection of depressed part 20.The peripheral wall 21 of depressed part 20 comprises covers wall 21a and fresh air guide wall 21b and 21c.Wherein cover the peripheral part setting of the as close as possible corresponding intake valve 6 of wall 21a and extend along the peripheral part of corresponding intake valve 6, its shape is consistent with the valve of being covered shape partly.Fresh air guide wall 21b is arranged in twos between the valve 6, and each fresh air guide wall 21c is arranged between the peripheral wall and corresponding intake valve 6 of inwall 3a of cylinder head 3.Covering wall 21a 4 extends to than the also low position of intake valve 6 that is in maximum lift position towards the firing chamber, like this, between the peripheral part of valve seat 9 and intake valve 6 and be positioned at the valve openings of exhaust valve one side, when intake valve 6 is opened, cover by corresponding coverage wall 21a all the time.Fresh air guide wall 21b and 21c are located substantially on same plane, and are arranged essentially parallel to the straight-line extension at the center of passing two intake valves 6.Spark plug 8 is arranged on the inner wall section 3c of cylinder head 3, and its set-up mode is to make it be positioned at the center of the inwall 3a of cylinder head 3.
In this embodiment, arch is covered peripheral length coverage wall 10 length extremely more shown in Figure 3 than Fig. 1 of wall 21a, like this, valve openings place between intake valve 6 and valve seat 9,1/3 opening that is positioned at exhaust valve one side is covered wall 21a accordingly and is covered, so fresh air infeeds firing chamber 4 from 2/3 valve openings of not covered of the opposite side that is positioned at exhaust valve 7.In addition, in this embodiment, the fresh air that flows into the firing chamber 4 from intake valve 6 is led by fresh air guide wall 21b and 21c, so that its inwall along cylinder is flowed downward.Therefore, in this embodiment, when intake valve 6 was opened, most of fresh air flowed (shown in the arrow U among Figure 10) towards the end face of piston 2 along the inwall of cylinder, can realize good Schnuerle scavenging operation thus.
Figure 11 and Figure 12 show and apply the present invention to two stroke diesel engine, in this embodiment, on the inwall 3a of the cylinder head 3 between intake valve 6 and the exhaust valve 7, be formed with a convex parts 30 that extends downwards, and near convex parts 30, be provided with oil nozzle 31.This convex parts 30 is provided with covers wall 30a, covers the peripheral part of the as close as possible intake valve 6 of wall 30a and extends with the arch formula along the periphery of intake valve 6.Covering wall 30a 4 extends downwardly into than the also low position of intake valve 6 that is in maximum lift position towards the firing chamber.Thus, when intake valve 6 is opened, between the valve seat of intake valve 6 and peripheral part and the valve openings that is positioned at exhaust valve one side covered wall 30a all the time and cover.Therefore, in this embodiment, air flows along direction shown in the arrow V among Figure 12, realizes good Schnuerle scavenging operation thus.For convex parts 30, its degree of convexity must be bigger, interferes in order to prevent that convex parts 30 from producing with piston 2, convex parts 30 can be arranged to face with the pit of piston 2.
In the above-described embodiment, cover wall and all be molded on the cylinder head, yet, cover wall also can be molded over one with the cylinder head separated components on, for example, cover wall and can be molded on the valve seat of intake valve or exhaust valve, at this moment just need suitably change the shape of these valve seats.
According to the present invention, in the All Time that intake valve is opened, cover the valve openings that between the valve seat of intake valve and peripheral part, forms all the time by utilize covering wall in exhaust valve one side, just might obtain good Schnuerle scavenging operation, just can obtain the good combustion performance and the high-output power of motor thus.
Though invention has been described in conjunction with specific embodiments for the purpose of example,, under the situation that does not exceed basic thought of the present invention and scope, can make many changes obviously for the people who is familiar with related domain.
Claims (25)
1, a kind of two stroke engine, it comprises:
An engine body, it comprises a cylinder head with inwall,
One can be in described engine body pistons reciprocating, between the end face of described cylinder head inwall and described piston, limit a firing chamber,
At least one is arranged on the intake valve on the described cylinder head inwall,
At least one is arranged on the exhaust valve on the described cylinder head inwall,
A spark plug that is arranged on the cylinder head inwall,
It is characterized in that:
Be provided with mask between described intake valve and exhaust valve, it is used for will being formed on all the time in the All Time that intake valve is opened between the valve seat of described intake valve and the peripheral part and the valve openings that is positioned at described exhaust valve one side is covered.
2, according to the two stroke engine of claim 1, it is characterized in that described mask has the coverage wall that is provided with near the peripheral part that is positioned at described exhaust valve one side on the described intake valve, this coverage wall extends downwardly into than the also low position of described intake valve that is in maximum lift position towards described piston.
3, according to the two stroke engine of claim 2, it is characterized in that described coverage wall extends along the peripheral part of described intake valve, its shape is consistent with the shape of the valve part of being covered.
4,, it is characterized in that described coverage wall extends along roughly 1/3 part of the peripheral part of described valve according to the two stroke engine of claim 3.
5, according to the two stroke engine of claim 2, it is characterized in that described cylinder head inwall has the convex portion that stretches out and extend along described cylinder head inwall towards described piston downwards between described intake valve and exhaust valve, and described coverage wall is molded on the described convex portion.
6,, it is characterized in that described convex portion has the general triangular cross section according to the two stroke engine of claim 5.
7,, it is characterized in that described exhaust valve and described convex portion branch is arranged according to the two stroke engine of claim 5.
8,, it is characterized in that described convex portion extends along the whole length of described cylinder head inwall according to the two stroke engine of claim 5.
9, two stroke engine according to Claim 8 it is characterized in that described motor has two intake valves, and described coverage wall offers each intake valve.
10, two stroke engine according to Claim 8 is characterized in that described spark plug is arranged on intake valve one side of described convex portion.
11,, it is characterized in that described convex portion has the arch middle body that faces described exhaust valve, and described spark plug is arranged on the central authorities of described cylinder head inwall basically and is centered on by described arch middle body according to the two stroke engine of claim 10.
12, according to the two stroke engine of claim 2, it is characterized in that described cylinder head inwall has moulding depressed part thereon, and comprise the diapire of an inner wall section flat basically except described depressed part and a described depressed part and the peripheral wall of a described depressed part, described peripheral wall is between described inner wall section and described diapire, described intake valve is arranged on the described diapire, described exhaust valve is arranged on the described inner wall section, and described coverage wall is arranged on the described peripheral wall.
13, according to the two stroke engine of claim 12, the peripheral wall that it is characterized in that described depressed part extends between the opposite end of the peripheral wall of described cylinder head inwall, and described peripheral wall constitutes the fresh air guide wall of extending towards described piston downwards except that described coverage wall.
14, according to the two stroke engine of claim 13, it is characterized in that described motor has two intake valves, and described fresh air guide wall comprises in first guide wall between described two intake valves and in the peripheral wall of described cylinder head inwall and second guide wall between the described intake valve.
15, according to the two stroke engine of claim 14, it is characterized in that described first guide wall and second guide wall are located substantially on same plane, this plane is arranged essentially parallel to the straight-line extension of the center line that passes described two intake valves.
16,, it is characterized in that described spark plug is positioned at the center of described cylinder head inwall substantially according to the two stroke engine of claim 12.
17,, it is characterized in that described exhaust valve opens and closes early than described intake valve according to the two stroke engine of claim 1.
18,, it is characterized in that also comprising the oil nozzle that is arranged in the described suction port according to the two stroke engine of claim 1.
19, according to the two stroke engine of claim 18, it is characterized in that the ear end face part injected fuel of described oil nozzle towards the air door body of described intake valve, this ear end face partly is positioned at the opposite side of described mask.
20,, it is characterized in that described oil nozzle is to have the bar-shaped injected fuel of little scattering angle according to the two stroke engine of claim 19.
21,, it is characterized in that described oil nozzle injected fuel after described intake valve is opened and before described piston arrives bottom dead center according to the two stroke engine of claim 18.
22, a kind of two stroke engine, it comprises
An engine body, it comprises a cylinder head with inwall,
One can be in described engine body pistons reciprocating, between the end face of described cylinder head inwall and described piston, limit a firing chamber,
At least one is arranged on the intake valve on the described cylinder head inwall,
At least one is arranged on the exhaust valve on the described cylinder head inwall,
An oil nozzle that is arranged on the described cylinder head inwall,
It is characterized in that:
Be provided with mask between described intake valve and exhaust valve, it is used for will being formed on all the time in the All Time that intake valve is opened between the valve seat of described intake valve and the peripheral part and the valve openings that is positioned at described exhaust valve one side is covered.
23, according to the two stroke engine of claim 22, it is characterized in that described mask has the coverage wall that is provided with near the peripheral part that is positioned at described exhaust valve one side on the described intake valve, this coverage wall extends downwardly into than the also low position of described intake valve that is in maximum lift position towards described piston.
24, according to the two stroke engine of claim 23, it is characterized in that described coverage wall extends along the peripheral part of described intake valve, its shape is consistent with the shape of the valve part of being covered.
25,, it is characterized in that described exhaust valve opens and closes early than described intake valve according to the two stroke engine of claim 22.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP288390/87 | 1987-11-17 | ||
| JP28839087 | 1987-11-17 | ||
| JP102659/88 | 1988-04-27 | ||
| JP63102659A JPH0733770B2 (en) | 1987-07-09 | 1988-04-27 | Combustion chamber structure of two-cycle internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1034247A CN1034247A (en) | 1989-07-26 |
| CN1018078B true CN1018078B (en) | 1992-09-02 |
Family
ID=26443343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN88107889A Expired CN1018078B (en) | 1987-11-17 | 1988-11-16 | Two stroke engine |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR920006810B1 (en) |
| CN (1) | CN1018078B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4265434B2 (en) * | 2004-02-10 | 2009-05-20 | 日産自動車株式会社 | Combustion chamber of internal combustion engine |
| JP6264882B2 (en) * | 2013-12-26 | 2018-01-24 | トヨタ自動車株式会社 | Combustion chamber structure of a spark ignition internal combustion engine |
| CN104234818B (en) * | 2014-09-18 | 2018-04-10 | 石建民 | A kind of two-stroke internal combustion engine |
| CN104484552B (en) * | 2014-11-20 | 2018-04-03 | 哈尔滨工程大学 | Two-stroke low speed diesel engine peculiar to vessel sweeps capacity computational methods |
| CN105756780B (en) * | 2016-04-25 | 2018-03-09 | 雷斌 | A kind of reciprocating independent lubricating two stroke engine and its operation method |
| CN106640338B (en) * | 2016-12-28 | 2019-03-08 | 天津大学 | A kind of overhead valve two-stroke directly spraying petrol engine combustion camber in cylinder |
| CN108915850A (en) * | 2018-06-13 | 2018-11-30 | 中国北方发动机研究所(天津) | A kind of two stroke diesel engine valve is against tumble flow air exchange system |
| CN111140342B (en) * | 2020-04-07 | 2020-11-20 | 潍柴动力股份有限公司 | Gas engine combustion system and gas engine with same |
-
1988
- 1988-11-16 CN CN88107889A patent/CN1018078B/en not_active Expired
- 1988-11-17 KR KR8815155A patent/KR920006810B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR890008434A (en) | 1989-07-10 |
| CN1034247A (en) | 1989-07-26 |
| KR920006810B1 (en) | 1992-08-20 |
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