CN203756313U - Gasoline engine - Google Patents
Gasoline engine Download PDFInfo
- Publication number
- CN203756313U CN203756313U CN201420076316.4U CN201420076316U CN203756313U CN 203756313 U CN203756313 U CN 203756313U CN 201420076316 U CN201420076316 U CN 201420076316U CN 203756313 U CN203756313 U CN 203756313U
- Authority
- CN
- China
- Prior art keywords
- gas
- air belt
- scavenging air
- scavenging
- crankcase
- 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 - Lifetime
Links
- 230000002000 scavenging effect Effects 0.000 claims abstract description 169
- 238000005192 partition Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 abstract description 105
- 239000002912 waste gas Substances 0.000 abstract description 9
- 239000000446 fuel Substances 0.000 abstract description 8
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 description 25
- 230000009467 reduction Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- 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
Abstract
The utility model discloses a gasoline engine, and belongs to the field of piston type internal combustion engines. The gasoline engine comprises a gas cylinder body with a cylinder cavity and a crankcase with a crankshaft chamber, the gas cylinder body is located above the crankcase, a gas inlet hole and a gas exhaust hole are formed in the inner wall of the gas cylinder body, a sealed gas scavenging channel set is further arranged, the gas scavenging channel set enables the cylinder cavity and the crankshaft chamber to be communicated, the gas scavenging channel set comprises a first gas scavenging channel and a second gas scavenging channel, a first gas scavenging opening and a second gas scavenging opening are formed in the positions, on the inner wall of the cylinder body, of the first gas scavenging channel and the second gas scavenging channel respectively, a first gas channel opening and a second gas channel opening are formed in the positions, on the inner wall of the crankcase, of the first gas scavenging channel and the second gas scavenging channel respectively, the first gas scavenging opening is closer to the gas exhaust hole than the second gas scavenging opening, the second gas channel opening is formed in the bottom of the crankcase, and the first gas channel opening is higher than the second gas channel opening. Poor mixed gas and rich mixed gas are separated, the poor mixed gas repels combusted waste gas out of the gas exhaust hole, fuel losses and harmful components in tail gas are reduced, and heat efficiency is improved by 20 percent to 30 percent.
Description
Technical field
The utility model relates to internal-combustion piston engine field, in particular to a kind of petrol engine.
Background technique
The working principle of common two stroke petrol engine is as follows now: piston stroking upward, and exhaust port and scavenging port are closed, and start the mixed gas in compression cylinder; Piston stroking upward to inlet hole is opened, and incoming mixture sucks crankcase; In the time that piston is about to arrive top dead center, plug ignition burning; Because plug ignition is lighted after mixed gas, promote descent of piston acting; Because piston is descending, the mixed gas in crankcase is compressed, and now the check valve sheet before inlet hole is closed automatically, and the gas in crankcase is by precompression; In the time that piston is about to arrive lower dead center, exhaust port is opened, and starts exhaust, and the precompressed mixed gas in crankcase enters cylinder through scavenging port simultaneously, and waste gas is discharged from exhaust port, completes scavenging process.
Utilize like this waste gas after the fresh mixed gas without burning burns cylinder combustion to expel, just cause mixed gas denseer in this mixed gas also together to discharge with waste gas without burning, not only fuel loss is larger, and harmful gas content in emission is higher.
Model utility content
The purpose of this utility model is to provide a kind of petrol engine, to solve existing two stroke petrol engine owing to utilizing the waste gas after fresh mixed gas burns cylinder combustion to extrude, cause denseer mixed gas also together to discharge with waste gas, the problem that fuel loss is larger.
The technical solution adopted in the utility model is: a kind of petrol engine, comprise the cylinder block with cylinder chamber and the crankcase with crankshaft room, described cylinder block is positioned at the top of described crankcase, the inwall of described cylinder block is provided with inlet hole, exhaust port, also be provided with enclosed scavenging air belt group, described scavenging air belt group is communicated with described cylinder chamber with described crankshaft room, described scavenging air belt group comprises the first scavenging air belt and the second scavenging air belt, described the first scavenging air belt and described the second scavenging air belt form respectively the first scavenging port on the inwall of described cylinder block, the second scavenging port, described the first scavenging air belt and described the second scavenging air belt form respectively the first gas port on the inwall of described crankcase, the second gas port, described the first scavenging port is with respect to the more close described exhaust port of described the second scavenging port, described the second gas port is positioned at the bottom of described crankcase, described the first gas port is higher than described the second gas port.
Scavenging air belt group is communicated with cylinder chamber with crankshaft room, a scavenging air belt group part is positioned at cylinder block, and a part is positioned at crankcase.Cylinder chamber is positioned at the firing chamber on cylinder block inner carrier top, and crankshaft room is positioned at the crankcase inner space of piston bottom, by moving down of piston, the mixed gas in crankshaft room is entered to cylinder chamber by the extruding of scavenging air belt group.Petrol engine in the running, mixed gas in crankcase is along with the sense of rotation rotational flow of bent axle, thereby the liquid fuel of a part of atomization in crankcase centrifugal do or the effect of gravity under, drop is attached on the inwall of crankcase, the final wall flow that forms, wall flow flows to the bottom of crankcase along the inwall of crankcase, focus on the position of the second gas port, the mixed gas that so under high pressure enters the second scavenging air belt from the second gas port is denseer mixed gas, the drop that contains a large amount of wall flow surfaces; The mixed gas that enters the first scavenging air belt from being positioned at the first gas port of eminence is rarer mixed gas, thereby forms mixed platform gas dense, rare separation, makes dense, weak mixture enter cylinder chamber by the second separate scavenging air belt, the first scavenging air belt respectively.The rich mixture entering from the second scavenging port is trapped near the piston-top surface of exhaust port offside, cover rich mixture from the weak mixture entering in cylinder chamber near the first scavenging port of exhaust port, and weak mixture is expelled the waste gas after burning near being positioned at exhaust port from exhaust port, realize stratiform scavenging, greatly reduce the escape of rich mixture, reduce the content of harmful components in fuel loss and tail gas, reached reduction oil consumption, improved the object of discharge.Can also, by the appropriate design of the shape to the first gas port or the second gas port, better separate dense, weak mixture.
Further, on the inwall of described crankcase, be provided with groove, described groove is positioned at the top of described the first gas port, and the notch of described groove is tilted to the direction of described crankcase by the direction of described cylinder block, and the minimum point of the notch of described groove departs from described the first gas port.Such groove both can collect wall flow, can prevent again wall flow that the first gas port top flows down from flowing into the first gas port and cause increasing the concentration of the weak mixture in the first scavenging air belt, the wall flow that the inwall of the crankcase of the first gas port top is flowed down collects by groove, and then the minimum point of passing through the notch of groove flows out groove, flow to the bottom of crankcase, it is the position that wall flow all focuses on the second gas port, thereby further strengthen dense, the concentration difference of rare mixed platform gas, better separate dense, weak mixture, reduce further the escape of rich mixture.
Further, described scavenging air belt group is two groups, and described in two groups, scavenging air belt group is symmetrically set.Make to present good scavenging distribution character in cylinder block, better ensure the performance of complete machine.
Further, the described scavenging air belt group being positioned in described cylinder block is cylinder body scavenging air belt group, be positioned at described the first scavenging air belt in described cylinder block, described the second scavenging air belt is respectively the first cylinder body scavenging air belt, the second cylinder body scavenging air belt, described cylinder body scavenging air belt group is provided with partition wall, described the first cylinder body scavenging air belt and described the second cylinder body scavenging air belt are separated by described partition wall, the outer wall of described cylinder block is provided with the opening communicating with described cylinder body scavenging air belt group, and described opening is provided with cylinder end caps.Simple in structure, practical, compared with the structure of existing enclosed scavenging air belt, reduce structure complexity and moulding difficulty.
Further, the described scavenging air belt group being positioned on described crankcase is casing scavenging air belt group, be positioned at described the first scavenging air belt on described crankcase, described the second scavenging air belt is respectively the first casing scavenging air belt, the second casing scavenging air belt, described the first casing scavenging air belt is included in the first groove of offering on described crankcase and the first housing plate that seals described the first groove, and described the second casing scavenging air belt is included in the second groove of offering on described crankcase and the second housing plate that seals described the second groove.Make, on the groove and end cap of casing scavenging air belt composing type on crankcase, to realize the sealing of scavenging air belt group, can greatly reduce technology difficulty.
The beneficial effects of the utility model are, comprise the scavenging air belt group of two scavenging air belts by setting, make the second gas port be positioned at the bottom of crankcase, the first gas port is higher than the second gas port, thereby rare in separation crankcase, rich mixture, and respectively by separately independently scavenging port flow in cylinder chamber, the second scavenging air belt near air inlet one side for rich mixture, the first scavenging air belt near exhaust one side for weak mixture, weak mixture is expelled the waste gas after burning from exhaust port, thereby realize stratiform scavenging, greatly reduce the escape of rich mixture, reduce the content of harmful components in fuel loss and tail gas, reach reduction oil consumption, improve the object of discharge.Not only can not increase cost, and due to the raising of charging efficiency, make increased power, the thermal efficiency has improved 20%～30%, has improved economic performance.
Brief description of the drawings
Fig. 1 is the sectional view of the petrol engine that provides of the utility model the first embodiment;
Fig. 2 is the schematic diagram of the scavenging air belt group of the petrol engine that provides of the utility model the first embodiment;
Fig. 3 is the overall schematic of the petrol engine that provides of the utility model the second embodiment;
Fig. 4 is the sectional view of the petrol engine that provides of the utility model the second embodiment;
Fig. 5 is the schematic diagram of the scavenging air belt group of the petrol engine that provides of the utility model the second embodiment.
Embodiment
Also by reference to the accompanying drawings the utility model is described in further detail below by specific embodiment.
Fig. 1, Fig. 2 shows the petrol engine that the utility model the first embodiment provides, comprise the cylinder block 101 with cylinder chamber and the crankcase 102 with crankshaft room, cylinder block 101 is positioned at the top of crankcase 102, the inwall of cylinder block 101 is provided with inlet hole 103, exhaust port 104, also be provided with enclosed scavenging air belt group, scavenging air belt group is communicated with cylinder chamber with crankshaft room, scavenging air belt group comprises the first scavenging air belt 111 and the second scavenging air belt 121, the first scavenging air belt 111 and the second scavenging air belt 121 form respectively the first scavenging port 112 on the inwall of cylinder block 101, the second scavenging port 122, the first scavenging air belt 111 and the second scavenging air belt 121 form respectively the first gas port 113 on the inwall of crankcase 102, the second gas port 123, the first scavenging port 112 is with respect to the more close exhaust port 104 of the second scavenging port 122, the second gas port 123 is positioned at the bottom of crankcase 102, the first gas port 113 is higher than the second gas port 123.
Petrol engine in the running, mixed gas in crankcase 102 is along with the sense of rotation rotational flow of bent axle, thereby the liquid fuel of crankcase 102 interior a part of atomizations centrifugal do or the effect of gravity under, drop is attached on the inwall of crankcase 102, the final wall flow that forms, wall flow flows to the bottom of crankcase 102 along the inwall of crankcase, focus on the position of the second gas port 123, the mixed gas that so under high pressure enters the second scavenging air belt 121 from the second gas port 123 is denseer mixed gas, the drop that contains a large amount of wall flow surfaces; The mixed gas that enters the first scavenging air belt 111 from being positioned at the first gas port 113 of eminence is rarer mixed gas, thereby form mixed platform gas dense, rare separation, make dense, weak mixture enter cylinder chamber by separate the second scavenging air belt 121, the first scavenging air belt 111 respectively.
The rich mixture entering from the second scavenging port 122 is trapped near the piston-top surface of exhaust port 104 offsides, cover rich mixture from the weak mixture entering in cylinder chamber near the first scavenging port 112 of exhaust port 104, and weak mixture is expelled the waste gas after burning near being positioned at exhaust port 104 from exhaust port 104, realize stratiform scavenging, greatly reduce the escape of rich mixture, reduce the content of harmful components in fuel loss and tail gas, reached reduction oil consumption, improved the object of discharge.
Fig. 3 to Fig. 5 shows the petrol engine that the utility model the second embodiment provides, comprise the cylinder block 101 with cylinder chamber and the crankcase 102 with crankshaft room, cylinder block 101 is positioned at the top of crankcase 102, the inwall of cylinder block 101 is provided with inlet hole 103, exhaust port 104, also be provided with enclosed scavenging air belt group, scavenging air belt group is communicated with cylinder chamber with crankshaft room, scavenging air belt group comprises the first scavenging air belt 111 and the second scavenging air belt 121, the first scavenging air belt 111 and the second scavenging air belt 121 form respectively the first scavenging port 112 on the inwall of cylinder block 101, the second scavenging port 122, the first scavenging air belt 111 and the second scavenging air belt 121 form respectively the first gas port 113 on the inwall of crankcase 102, the second gas port 123, the first scavenging port 112 is with respect to the more close exhaust port 104 of the second scavenging port 122, the second gas port 123 is positioned at the bottom of crankcase 102, the first gas port 113 is higher than the second gas port 123.
In the present embodiment, on the inwall of crankcase 102, be provided with groove 105, groove 105 is positioned at the top of the first gas port 113, and the notch of groove 105 is tilted to the direction of crankcase 102 by the direction of cylinder block 101, and the minimum point of the notch of groove 105 departs from the first gas port 113.The scavenging air belt group being positioned in cylinder block 101 is cylinder body scavenging air belt group, the first scavenging air belt 111, the second scavenging air belt 121 that are positioned in cylinder block 101 are respectively the first cylinder body scavenging air belt, the second cylinder body scavenging air belt, cylinder body scavenging air belt group is provided with partition wall 106, the first cylinder body scavenging air belt and the second cylinder body scavenging air belt are separated by partition wall 106, the outer wall of cylinder block 101 is provided with the opening 131 communicating with cylinder body scavenging air belt group, and opening 131 places are provided with cylinder end caps 132.The scavenging air belt group being positioned on crankcase 102 is casing scavenging air belt group, the first scavenging air belt 111, the second scavenging air belt 121 that are positioned on crankcase 102 are respectively the first casing scavenging air belt, the second casing scavenging air belt, the first casing scavenging air belt is included in the first groove 133 of offering on crankcase 102 and the first housing plate 134, the second casing scavenging air belts that seal the first groove 133 is included in the second groove 135 of offering on crankcase and the second housing plate 136 that seals the second groove 135.The lower end of the first groove 133, the second groove 135 communicates with the first gas port 113, the second gas port 123 respectively.The first groove 133 and the second groove 135 are all circular-arc, are positioned at the both sides of the crankshaft hole of crankcase 102, form air flue, take full advantage of the housing structure of crankcase 102.
In order to make to present good scavenging distribution character in cylinder block 101, better ensure the performance of complete machine, scavenging air belt group is two groups, and two groups of scavenging air belt groups are symmetrically set, thus, the first cylinder body scavenging air belt, the second cylinder body scavenging air belt and the first casing scavenging air belt, the second casing scavenging air belt is two respectively, and corresponding at the two ends of cylinder block 101 and the two ends of crankcase 102 be symmetrical arranged, be that opening 131 and corresponding cylinder end caps 132 are two, be positioned at the two ends of cylinder block, the first groove 133 and the second groove 135 and the first housing plate 134, the second housing plate 136 is two respectively, be positioned at the two ends of crankcase 102, it is the crankshaft hole place at crankcase 102 two ends.The structure of scavenging air belt group is simpler like this, practical, compared with the structure of existing enclosed scavenging air belt, structure complexity and moulding difficulty are reduced, on the groove and end cap of casing scavenging air belt composing type on crankcase 102, realize the sealing of scavenging air belt group, greatly reduce technology difficulty.
Groove 105 in the present embodiment both can collect wall flow, can prevent that again wall flow that the first gas port 113 tops flow down from flowing into the first gas port 113 and having caused increasing the concentration of the weak mixture in the first scavenging air belt 111, the wall flow that the inwall of the crankcase 102 of the first gas port 113 tops is flowed down collects by groove 105, and then the minimum point of passing through the notch of groove 105 flows out groove 105, flow to the bottom of crankcase 102, it is the position that wall flow all focuses on the second gas port 123, thereby further strengthen dense, the concentration difference of rare mixed platform gas, better separate dense, weak mixture, reduce further the escape of rich mixture.Not only can not increase cost, and the thermal efficiency improves 20%～30%, improved economic performance.
In the utility model, casing scavenging air belt group is not limited to be molded on the groove and end cap on crankcase, can also or be arranged on the modes such as the inside of crankcase by external tracheae and realize; Equally, also be not limited to collect wall flow by groove being set above the first gas port, prevent wall flow that the first gas port top flows down from flowing into the first gas port and caused reducing the concentration difference of dense, rare mixed platform gas, can also prevent that wall flow from flowing into the first gas port by setting up boss at the first gas port or the first gas port being arranged to the modes such as other shapes.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (5)
1. a petrol engine, comprise the cylinder block with cylinder chamber and the crankcase with crankshaft room, described cylinder block is positioned at the top of described crankcase, the inwall of described cylinder block is provided with inlet hole, exhaust port, it is characterized in that, also be provided with enclosed scavenging air belt group, described scavenging air belt group is communicated with described cylinder chamber with described crankcase, described scavenging air belt group comprises the first scavenging air belt and the second scavenging air belt, described the first scavenging air belt and described the second scavenging air belt form respectively the first scavenging port on the inwall of described cylinder block, the second scavenging port, described the first scavenging air belt and described the second scavenging air belt form respectively the first gas port on the inwall of described crankcase, the second gas port, described the first scavenging port is with respect to the more close described exhaust port of described the second scavenging port, described the second gas port is positioned at the bottom of described crankcase, described the first gas port is higher than described the second gas port.
2. petrol engine according to claim 1, it is characterized in that, on the inwall of described crankcase, be provided with groove, described groove is positioned at the top of described the first gas port, the notch of described groove is tilted to the direction of described crankcase by the direction of described cylinder block, and the minimum point of the notch of described groove departs from described the first gas port.
3. petrol engine according to claim 1, is characterized in that, described scavenging air belt group is two groups, and described in two groups, scavenging air belt group is symmetrically set.
4. petrol engine according to claim 1, it is characterized in that, the described scavenging air belt group being positioned in described cylinder block is cylinder body scavenging air belt group, be positioned at described the first scavenging air belt in described cylinder block, described the second scavenging air belt is respectively the first cylinder body scavenging air belt, the second cylinder body scavenging air belt, described cylinder body scavenging air belt group is provided with partition wall, described the first cylinder body scavenging air belt and described the second cylinder body scavenging air belt are separated by described partition wall, the outer wall of described cylinder block is provided with the opening communicating with described cylinder body scavenging air belt group, and described opening is provided with cylinder end caps.
5. petrol engine according to claim 1, it is characterized in that, the described scavenging air belt group being positioned on described crankcase is casing scavenging air belt group, be positioned at described the first scavenging air belt on described crankcase, described the second scavenging air belt is respectively the first casing scavenging air belt, the second casing scavenging air belt, described the first casing scavenging air belt is included in the first groove of offering on described crankcase and the first housing plate that seals described the first groove, and described the second casing scavenging air belt is included in the second groove of offering on described crankcase and the second housing plate that seals described the second groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420076316.4U CN203756313U (en) | 2014-02-21 | 2014-02-21 | Gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420076316.4U CN203756313U (en) | 2014-02-21 | 2014-02-21 | Gasoline engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203756313U true CN203756313U (en) | 2014-08-06 |
Family
ID=51251599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420076316.4U Expired - Lifetime CN203756313U (en) | 2014-02-21 | 2014-02-21 | Gasoline engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203756313U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790690A (en) * | 2014-02-21 | 2014-05-14 | 浙江天泰机械有限公司 | Gasoline engine |
| CN104929797A (en) * | 2015-07-02 | 2015-09-23 | 浙江天泰机械有限公司 | Two-stroke engine cylinder and two-stroke engine |
| CN110374759A (en) * | 2019-08-23 | 2019-10-25 | 山东朗森机械有限公司 | Gasoline box body and its gasoline engine |
-
2014
- 2014-02-21 CN CN201420076316.4U patent/CN203756313U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790690A (en) * | 2014-02-21 | 2014-05-14 | 浙江天泰机械有限公司 | Gasoline engine |
| CN104929797A (en) * | 2015-07-02 | 2015-09-23 | 浙江天泰机械有限公司 | Two-stroke engine cylinder and two-stroke engine |
| CN110374759A (en) * | 2019-08-23 | 2019-10-25 | 山东朗森机械有限公司 | Gasoline box body and its gasoline engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140806 |