CN104018939A - Engine with oppositely-arranged pistons and oppositely-arranged cylinders - Google Patents
Engine with oppositely-arranged pistons and oppositely-arranged cylinders Download PDFInfo
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- CN104018939A CN104018939A CN201310066967.5A CN201310066967A CN104018939A CN 104018939 A CN104018939 A CN 104018939A CN 201310066967 A CN201310066967 A CN 201310066967A CN 104018939 A CN104018939 A CN 104018939A
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- 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
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Abstract
The invention discloses an engine with oppositely-arranged pistons and oppositely-arranged cylinders. The engine comprises pre-combustion devices, and the pre-combustion devices are installed on the cylinders of the engine respectively. Each pre-combustion device comprises a fuel injector, an igniter and a swirl chamber, each pre-combustion device is provided with a channel used for connecting the corresponding swirl chamber and a combustion chamber of the engine, a fuel spray nozzle of the fuel injector of each pre-combustion device is connected with the swirl chamber of the corresponding pre-combustion device, and the extending portion of each igniter is connected with the inside of the corresponding swirl chamber. The engine has the advantages that the cylinders of the engine are provided with the pre-combustion devices so that mixed gas of oil and gas completely mixed before a top end center is pre-combusted, fuel gas ignited at the upper end center later jets and enters the combustion chamber, work efficiency of the engine with the oppositely-arranged pistons and the oppositely-arranged cylinders is effectively improved in the processes, and meanwhile, the cold start characteristic of the engine with the oppositely-arranged pistons and the oppositely arranged cylinders can be improved.
Description
Technical field
The present invention relates to internal-combustion engine, be specifically related to a kind of opposed pistons opposed-cylinder engine.
Background technique
In some two stroke engines, the internal-combustion engine of the opposed cylinder of opposed pistons that for example some single shafts are arranged, when these motors are during by diesel driven, their cold start-up always can not reach good effect, and this patent is intended to improve the cold start characteristics of the opposed cylinder type diesel engine of opposed pistons.
Chinese patent CN202707314U discloses a kind of diesel engine that makes can be high and cold, the diesel engine cold-starting device of the environmental work of high height above sea level, comprise circulating water heating system and cold start-up air-path control system, described cold start-up air-path control system comprises master controller, diesel engine oil tank, easing valve, atmospheric valve, bypass solenoid valve, inverse proportion valve, load solenoid valve and control gas path pipe, described master controller is connected with loading solenoid valve with bypass solenoid valve by guide line, described diesel engine oil tank is respectively by controlling gas path pipe and atmospheric valve, bypass solenoid valve is connected with loading solenoid valve, described atmospheric valve and easing valve, inverse proportion valve is connected with loading solenoid valve.The disclosed diesel engine cold-starting device of this patent, makes pneumatics function be applicable to environment high and cold, high height above sea level; Cold-starting successful, reliable performance; Simple to operate, easy to use, this patent and the application are in order to improve the cold start-up of diesel engine, but both all exist significant difference on the engine type of concrete structure and application.
Chinese patent CN102493905A discloses a kind of cold-booting auxiliary device for diesel engine and controlling method.Because the diesel engine cold start-up auxiliary control method in this invention is adjusted the heating time of heater plug according to actual water temperature, the heating time of heater plug is adjusted in realization according to the variation of ambient temperature, and start up period and idling warm-up period all can play the effect of heating, the temperature that improves engine chamber, the burning of motor and exhaust emissions can be significantly improved; Simultaneously by detecting opening time and the fuel injection quantity of the positioning control Injection Pump advancer of true temperature and enable switch, thereby changed the fuel supply advance angle of diesel engine, when water temperature is on the low side, can auxiliary diesel oil spout, further improve the cold starting performance of diesel engine.Cold-booting auxiliary device for diesel engine based on said method has improved the cold starting performance of diesel engine, all there is obvious difference with the application in the concrete structure that this patent adopts in improving diesel engine cold start-up and the concrete grammar of use, and the application is specifically used on opposed pistons opposed-cylinder engine.
Summary of the invention
The problems referred to above that exist for existing internal-combustion engine, the invention provides a kind of opposed pistons opposed-cylinder engine that improves cold start characteristics.
The technological scheme that the present invention adopted is for achieving the above object:
A kind of opposed pistons opposed-cylinder engine, comprise preheat device, described preheat device is installed on respectively on the cylinder of described motor, described preheat device comprises oil sprayer, igniter and vortex chamber, described preheat device is provided with a passage to connect the firing chamber of described vortex chamber and described motor, the fuel nozzle of described oil sprayer is connected into described vortex chamber, and the extension of described igniter is connected in described vortex chamber.
Above-mentioned opposed pistons opposed-cylinder engine, wherein, described preheat device connects the fuel oil supply system of body.
Above-mentioned opposed pistons opposed-cylinder engine, wherein, described vortex chamber is circular whirlpool shape.
Above-mentioned opposed pistons opposed-cylinder engine, wherein, described igniter is glow plug, and described igniter is arranged in the eddy current downstream of described vortex chamber, the extension of described igniter is the firing tip of described igniter, and described firing tip is positioned at the central position of described vortex chamber.
Above-mentioned opposed pistons opposed-cylinder engine, wherein, the ellipse that the passway of described passage matches for the cylinder inner wall with described motor, air-flow enters in the pit of installing on the piston top of described motor by described passway, makes not interfere with each other with the air-flow of described firing chamber.
Above-mentioned opposed pistons opposed-cylinder engine, wherein, described passage both can make air enter described vortex chamber via it, also can allow the fuel mixture of lighting expand and enter in the described firing chamber of described motor from described vortex chamber.
Owing to having adopted above-mentioned technology, the good effect that technique scheme compared with prior art has is:
By install preheat device on cylinder, the fuel-air mixture pre-burning of mixing completely in budc with realization and the fuel gas injection of lighting when top dead center subsequently enter into firing chamber, realize the working efficiency that such process can effectively improve opposed pistons opposed-cylinder engine, also can improve on the other hand the cold start characteristics of the opposed cylinder diesel engine of opposed pistons.
Accompanying drawing explanation
Fig. 1 is the sectional view of the piston in the right cylinder of a kind of opposed pistons opposed-cylinder engine of the present invention while reaching top dead center;
Fig. 2 is the sectional view of A-A part in Fig. 1;
Fig. 3 is the sectional view of the piston in the right cylinder of a kind of opposed pistons opposed-cylinder engine of the present invention while moving to top dead center from lower dead center;
Fig. 4 is that the piston in the right cylinder of a kind of opposed pistons opposed-cylinder engine of the present invention is reaching the sectional view of budc;
Fig. 5 is the amplification view that the piston of a kind of opposed pistons opposed-cylinder engine of the present invention reaches the main port connection firing chamber of budc preheat device;
Fig. 6 be the piston of a kind of opposed pistons opposed-cylinder engine of the present invention while reaching top dead center the main port of preheat device connect the amplification view of firing chamber;
Fig. 7 is the amplification view that the piston of a kind of opposed pistons opposed-cylinder engine of the present invention has just reached the main port connection firing chamber of atdc preheat device;
Fig. 8 is the mounting point schematic diagram of the igniter of a kind of opposed pistons opposed-cylinder engine of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but not as limiting to the invention.
The sectional view of a kind of opposed pistons opposed-cylinder engine of the present invention as illustrated in fig. 1 and 2, comprise preheat device 200, preheat device 200 is installed on respectively on the cylinder of motor, preheat device 200 comprises oil sprayer 250, igniter 230He vortex chamber 210, preheat device 200 is provided with a passage 208 to connect the firing chamber of vortex chamber 210 and motor, the fuel nozzle 252 of oil sprayer 250 connects into vortex chamber 210, and the extension of igniter 230 is connected in vortex chamber 210.
Further, the right cylinder assembly 100 of opposed pistons opposed-cylinder engine.In opposed pistons opposed-cylinder engine, on common bent axle, conventionally there is identical opposed cylinder designated as left hand cylinder and right cylinder.For the ease of simple understanding, only have here a cylinder of motor is described in detail to its technology and running and done example.Yet this thought describing mode is equally applicable to opposed another cylinder, and the equally applicable such drive manner of the mode of cylinder described in stroke in the back.
Further, the right cylinder assembly 100 described in Fig. 1 and Fig. 2, is included in the interior outer piston while reaching its top dead center position in right cylinder 110.The interior outer piston that is arranged on 110 li of right cylinder has formed to-and-fro motion and has been connected on bent axle and (is not shown here) by piston rod.Right side outer piston is connected with corresponding Piston and rod assembly 300.Right side outer piston has the right side outer piston end face 105 relative with right side inner carrier end face 102.Here the right side outer piston end face 105 that will introduce has the spheric structure of spill, and right side inner carrier end face 102 has the spheric structure of convex.Here two piston top spherical radius embodying are duplicate, and this is in order to form embedded structure or accurate cooperation when two pistons reach top dead center position.In order to deepen its advantage, right side inner carrier end face 102 has can provide extra pit 104 when piston reaches its top dead center.At the inner close inner carrier external margin of pit 104, place has formed first passage 106, and it can provide and continue to connect between pit 104 and inner carrier edge.Ramp way 107(shown on right side outer piston end face 105 is as shown in Figure 6) and from outer piston end face 105 tops, right side, extend to the edge of right side outer piston and relative with first passage 106.
Further, when in right side, outer piston reaches top dead center position, in right cylinder 110, just in time match with the position of first passage 106 and ramp way 107 in formed oil spout port one 21 positions.
Further, there is the preheat device 200 of nose shape end 202 to be connected with right cylinder 110.Preheat device 200 provides rigging position for oil sprayer 250 and igniter 230.Preheat device 200 also comprises the nose shape end 202 of its inner vortex chamber 210 and strict coupling oil spout port one 21.The nose shape end 202 of preheat device 200 have the passage 208 that is positioned between oil spout port one 21He vortex chamber 210 with and the passway 212 of exterior extremity.In this position of right cylinder 110, because the installation of piston can prevent to close, so passway 212 is in order often to keep path.From this angle, passway 212 the shortest physical dimensions are crooked ellipse and align with the motion of piston, and its symmetry axis is positioned on the curve corresponding with cylinder inner wall circular curve.
Further, as shown in Figure 2, on the circular sectional view of this angle, vortex chamber 210 generally in the shape of a spiral, and has independent passway 212 to be connected with passage 208.The direct connected fuel nozzle 252 in oil sprayer 250You He vortex chamber 210.Igniter 230 has the firing tip 232 that extends to 210 inside, vortex chamber.
A kind of opposed pistons opposed-cylinder engine of the present invention as shown in Figure 3, the view of right cylinder 110 has been illustrated two pistons just from the position of lower dead center, enters into and makes air be pressed into the compression stroke of vortex chamber 210 by passway 212 and passage 208.
Invent as shown in Figures 4 and 5 a kind of opposed pistons opposed-cylinder engine, interior outer piston reaches top dead center position separately.In Fig. 5, when right side inner carrier reaches its top dead center position, first passage 106 and passway 212 alignment are not to influence each other the air that enters into vortex chamber 210 by piston compression.The passway 212 of the shape of first passage 106 and size and alignment is in fact the same.The piston the other side's closer to each other moment in compression stroke, although the ramp way 107 of outer piston passway 212 alignment of getting along well, also not on the position with its interference.That is because the unique asymmetric piston movement time of this pancake engine.About this point, inner carrier reached its top dead center before outer piston.Result is that outer piston just reaches its top dead center position when inner carrier is toward left movement and while starting its expansion stroke.
A kind of opposed pistons opposed-cylinder engine of the present invention as shown in Figure 6, when outer piston reaches top dead center position, is defined in the firing chamber that inside and outside piston top forms and is in its minimum volume.This of whole cycle constantly, lighted at the igniter 230 that 210 li of vortex chambers fuel oil is injected in the air that forms eddy current and this fuel mixture is flowing through after heating.Fuel mixture forms blast expansion by chemical reaction in igniting process and produces plasma mixed gas, and Bing Cong vortex chamber 210 is injected in firing chamber by passage 208 and passway 212, and enters first passage 106 and ramp way 107.
Further, the position at first passage 106 and ramp way 107 edges does not affect injected plasma mixed gas out by passway 212, therefore in these positions, does not produce unnecessary focus yet.
A kind of opposed pistons opposed-cylinder engine of the present invention as shown in Figure 7, interior outer piston shortly past top dead center position and be accompanied by outer piston be moved to the left to ramp way 107 just with passway 212 justified margins this constantly.But do not provide the plasma mixed gas that enough advantages are expansion to produce focus.
Further, in compression stroke running, the fresh air compressing between interior outer piston is allowed to enter firing chamber, is equally also pressed into vortex chamber 210.Corresponding to the moment about 25 ° of budc, the fuel spray ejecting from fuel nozzle 252 enters into vortex chamber 210 and forms fuel mixture.Firing tip 232 along fuel nozzle 252 to make to form the gas of the eddy-currents chemical reaction that takes fire under enough temperatures.The delay of this chemical reaction makes fuel mixture light completely in 10 ° of-15 ° of generations of budc.Be accompanied by the process of combustion reaction, the plasma mixed gas of generation is expanded and is entered into the firing chamber being defined between inside and outside piston top by passway 212 and nose shape end 202.The exceptional space that pit 104 produces allows more plasma mixed gas when piston reaches top dead center position, enter in the firing chamber of contraction and can be dispersed throughout the very large region of piston top.After Top Center, along with the expansion of combustion gas, the power of its generation can overcome the inertial force of piston and enter expansion stroke thereupon.At the end of expansion stroke, because making the waste gas after burning, pressure drop from vortex chamber, discharges completely, and only leave over considerably less remainder of exhaust gas and in upper once compression stroke, affect the burning of fresh fuel mixture.
A kind of opposed pistons opposed-cylinder engine of the present invention as shown in Figure 8, vortex chamber 210 two angles of interior use go to illustrate the position that igniter 230 is installed separately and the position of extending therein.The angle replacing at first, the residing position of igniter 230 can make its firing tip 232 be in arbitrary plane and be engaged in the general closed planar in above-mentioned described fuel mixture eddy current route downstream.Second angle replacing, the residing position of igniter 230 can make its firing tip 232 perpendicular to eddy current route and can provide point of ignition near vortex chamber's 210 cores.
The foregoing is only preferred embodiment of the present invention, not thereby limit claim of the present invention, so the equivalent structure that all utilizations specification of the present invention and diagramatic content are made changes, be all included in protection scope of the present invention.
Claims (6)
1. an opposed pistons opposed-cylinder engine, it is characterized in that, comprise preheat device, described preheat device is installed on respectively on the cylinder of described motor, described preheat device comprises oil sprayer, igniter and vortex chamber, described preheat device is provided with a passage to connect the firing chamber of described vortex chamber and described motor, and the fuel nozzle of described oil sprayer is connected into described vortex chamber, and the extension of described igniter is connected in described vortex chamber.
2. opposed pistons opposed-cylinder engine as claimed in claim 1, is characterized in that, described preheat device connects the fuel oil supply system of body.
3. opposed pistons opposed-cylinder engine as claimed in claim 1, is characterized in that, described vortex chamber is circular whirlpool shape.
4. opposed pistons opposed-cylinder engine as claimed in claim 1, it is characterized in that, described igniter is glow plug, described igniter is arranged in the eddy current downstream of described vortex chamber, the extension of described igniter is the firing tip of described igniter, and described firing tip is positioned at the central position of described vortex chamber.
5. opposed pistons opposed-cylinder engine as claimed in claim 1, it is characterized in that, the ellipse that the passway of described passage matches for the cylinder inner wall with described motor, air-flow enters in the pit of installing on the piston top of described motor by described passway, makes not interfere with each other with the air-flow of described firing chamber.
6. opposed pistons opposed-cylinder engine as claimed in claim 1, it is characterized in that, described passage both can make air enter described vortex chamber via it, also can allow the fuel mixture of lighting expand and enter in the described firing chamber of described motor from described vortex chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310066967.5A CN104018939A (en) | 2013-03-01 | 2013-03-01 | Engine with oppositely-arranged pistons and oppositely-arranged cylinders |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310066967.5A CN104018939A (en) | 2013-03-01 | 2013-03-01 | Engine with oppositely-arranged pistons and oppositely-arranged cylinders |
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| Publication Number | Publication Date |
|---|---|
| CN104018939A true CN104018939A (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310066967.5A Pending CN104018939A (en) | 2013-03-01 | 2013-03-01 | Engine with oppositely-arranged pistons and oppositely-arranged cylinders |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104632352A (en) * | 2014-12-11 | 2015-05-20 | 中国北方发动机研究所(天津) | Combined jet oil emulsion enveloping type combustor |
| CN115163289A (en) * | 2022-06-10 | 2022-10-11 | 中国北方发动机研究所(天津) | Swirl spray tumble combustion system of opposed-piston compression ignition engine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080127947A1 (en) * | 2006-11-30 | 2008-06-05 | Advanced Propulsion Technologies, Inc. | OPOC engine |
| US7861679B2 (en) * | 2004-06-10 | 2011-01-04 | Achates Power, Inc. | Cylinder and piston assemblies for opposed piston engines |
-
2013
- 2013-03-01 CN CN201310066967.5A patent/CN104018939A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7861679B2 (en) * | 2004-06-10 | 2011-01-04 | Achates Power, Inc. | Cylinder and piston assemblies for opposed piston engines |
| US20080127947A1 (en) * | 2006-11-30 | 2008-06-05 | Advanced Propulsion Technologies, Inc. | OPOC engine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104632352A (en) * | 2014-12-11 | 2015-05-20 | 中国北方发动机研究所(天津) | Combined jet oil emulsion enveloping type combustor |
| CN104632352B (en) * | 2014-12-11 | 2017-06-13 | 中国北方发动机研究所(天津) | A kind of combined jet oil beam encapsulating type combustion chamber |
| CN115163289A (en) * | 2022-06-10 | 2022-10-11 | 中国北方发动机研究所(天津) | Swirl spray tumble combustion system of opposed-piston compression ignition engine |
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Application publication date: 20140903 |