CN104989532A - Mechanically-controlled bi-direction oil supply piston type internal combustion engine - Google Patents
Mechanically-controlled bi-direction oil supply piston type internal combustion engine Download PDFInfo
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- CN104989532A CN104989532A CN201510400800.7A CN201510400800A CN104989532A CN 104989532 A CN104989532 A CN 104989532A CN 201510400800 A CN201510400800 A CN 201510400800A CN 104989532 A CN104989532 A CN 104989532A
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Abstract
The invention provides a mechanically-controlled bi-direction oil supply piston type internal combustion engine. A crankshaft is connected with a first oil pump shaft which is connected with a second oil pump shaft. A second oil pump is specially used for enabling an auxiliary nozzle to spray oil in an air inlet pipe before a piston moves downwards to a lower stop point at the angle ranging from 45 to 90 degrees in the air inlet process, and a first oil pump is specially used for enabling a main nozzle to spray oil into an air cylinder before the piston moves upwards to an upper stop point at the angle ranging from zero to eight degrees in a compression stroke. Combustion near the upper stop point is facilitated by bi-high-pressure oil pump oil supplying, the situation that fuel explodes and negative work is done before the compression stroke is finished is reduced as much as possible, a high compression ratio can be adopted, the circulation thermal efficiency is improved, and part of thin combustion is formed.
Description
Technical field
The invention belongs to field of internal combustion engine, especially relate to a kind of two-way delivery piston formula internal-combustion engine of Mechanical course.
Background technique
Eighties of last century, internal combustion engine development and operation technique history experienced by three great leaps: mechanical type oil-fired system, in cold supercharging technology and electric control fuel oil jet system.Tradition mechanical type oil-fired system relies on its reliability, easy-maintenance constantly developing and using always, but there is wretched insufficiency in it in Economy, power character, environmental-protecting performance, along with in the application of cold supercharging technology, the Economy that improve traditional mechanical type oil-fired system to a certain degree and power character.But along with 21 century arrives, people are to the consciousness of the energy, environmental protection and require day by day to improve, and the pulsation injection system of traditional mechanical type oil-fired system motor can not meet the requirement of Modern Engine.Therefore, the electric-controlled co-rail fuel injection technic of Modern Engine, on the basis avoiding conventional engines shortcoming, obtains and develops fast, has become fuel-injected Main Trends of The Development.In the later stage sixties 20th century, professor Hiber of Switzerland have developed " prototype " of internal-combustion engine electronic control common rail system, has carried out a series of research thereafter centered by the Ganser of polytechnical university of Switzerland teaches to electronic control common rail system.From 20 century 70s, in view of limited exploitation and the utilization of internal-combustion engine noxious gas emission severe contamination physical environment, petroleum resources, people initiatively effectively utilize the development that electronic technology, computer technology, sensory technique and control theory promote fuel of internal combustion engine spraying technique.Nineteen ninety-five Mo, ECD-U2 type electronic control common rail system to be successfully applied on truck internal-combustion engine and to produce in batches by Japan electric coating company, " from then on start the New Times of internal-combustion engine electronic control common rail fuel combustion system ", subsequently, the independently developed electronic control common rail system internal-combustion engine being respectively used to car, truck and engineering machinery is put on market by German Bosch company, the Cummiese company of the U.S., the Volvo company of Sweden, gondola Fiat company and Japan Isuzu Motors company etc. in succession.At present, internal-combustion engine electronic control spraying technique is popularized just rapidly, and its technical merit also reaches its maturity, total development trend be by positioning control to time controling transition, by analogue enlargement to digital control transition.
Because technology is started late, researched and developed weak foundation, and electronic control technology control system is complicated, manufacture cost is high, and domestic internal-combustion engine producer cannot manufacture electric-controlled type injection system.The present invention inherit mechanical type oil-fired system inherently by property, easy-maintenance preferably basis, adopt original diesel engine gear drive high pressure oil pump mechanism to realize novel secondary fuel feeding combustion process, thus overcome the shortcomings such as original mechanical type compression ratio of internal-combustion engine is low, efficiency is low.
Summary of the invention
Technical problem solved by the invention is, adopts the configuration of two oil feed pump to improve the compression ratio of existing machinery formula oil-jet internal combustion engine, thus improves the thermal efficiency of mechanical type oil-jet internal combustion engine.
The present invention realizes above-mentioned technical purpose by following technological means.
A kind of two-way delivery piston formula internal-combustion engine of Mechanical course, comprise crankcase 1, suction tude 11, outlet pipe 13, main fuel spray nozzle 12, also comprise the first oil pump 4 and the second oil pump 6, the bent axle 3 of described crankcase 1 is connected with the first oil pump shaft 5 of the first oil pump 4, and described first oil pump shaft 5 is connected with the second oil pump shaft 7 of the second oil pump 6; The top of described first oil pump 4 is connected with one end of main jet oil pipe 9, and the other end of described main jet oil pipe 9 is connected with main fuel spray nozzle 12, and described main fuel spray nozzle 12 is fixedly mounted on the top of crankcase 1 cylinder cap; The top of described second oil pump 6 is connected with one end of secondary spray bar 8, the other end of described secondary spray bar 8 is connected with secondary oil nozzle 10, described secondary oil nozzle 10 is connected with one end of suction tude 11, and the other end of described suction tude 11 is connected with the intake duct 15 of described crankcase 1 cylinder cap.
Further, the second oil pump shaft 7 of described second oil pump 6 be configured to piston 2 in intake process come downwards to before bottom dead center 45 °-90 ° make auxiliary jet 14 carry out oil spout; First oil pump shaft 5 of described first oil pump 4 is configured to piston 2 in compression stroke and goes upward to budc 0 °-8 ° and make main nozzle 14 carry out oil spout.
Further, described suction tude 11 is also connected with air-strainer 14, described air-strainer 14 is connected with suction tude 11, described suction tude 11 to be fixed in cylinder head and to be communicated with intake duct 15, the elbow of described suction tude 11 is processed with boss 16, and described boss 16 is fixed with auxiliary jet 12.
Beneficial effect of the present invention is: the injection system structure of mechanically controlled type is simple, controls reliable, adopts the mode of twice oil spout to reduce the negative work produced owing to shifting to an earlier date oil spout to catch fire; The high compression ratio of internal-combustion engine can be realized simultaneously by accurate fuel feeding, thus improve fuel thermal efficiency, and can forming section lean combustion.
Accompanying drawing explanation
Fig. 1 is the structure diagram of Mechanical course of the present invention two-way delivery piston 2 formula internal-combustion engine.
Fig. 2 is secondary oil nozzle mounting structure local sketch.
Description of reference numerals is as follows: the secondary spray bar of 1-crankcase, 2-piston 2,3-bent axle, 4-first oil pump, 5-first oil pump shaft, 6-second oil pump, 7-second oil pump shaft, 8-, 9-main jet oil pipe, 10-secondary oil nozzle, 11-suction tude, 12-main fuel spray nozzle, 13-outlet pipe, 14-air-strainer, 15-intake duct, 16-boss
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited to this.
Adopt two cover high pressure oil pump oil supply systems, make fuel feeding be divided into two-part.Secondary oil nozzle 10 is contained in suction tude 11, sprays into the oil of often circulation fixed amount, enter cylinder through suction tude 11, intake duct, intake valve in piston 2 breathing process.When intake process completes, fuel air mixture existing thin in cylinder, air fuel ratio now should at α > 2, such air fuel ratio mixture outside the section of catching fire voluntarily, even if adopt very high pressure ratio also can not ignition by compression.
Cylinder head is equipped with main fuel spray nozzle 10, when piston 2 compresses weak mixture close to top dead center, sprays into main fuel note.Namely the forward of oil note forms inflammable mixture with original weak mixture, catches fire rapidly under high pressure-temperature, lights weak mixture on the one hand, causes the positive displacement of weak mixture to burn; Physico preparation of catching fire before the follow-up amount of oil column also carries out combustion soon on the other hand, thus rapidly burn.
The oil column spraying into suction tude 11 should come downwards to 45 °-90 ° beginnings before bottom dead center at intake process piston 2, and at piston 2 to end of injection before bottom dead center, to guarantee, fuel injection quantity is at the end of air inlet, all enters cylinder.
The oil mass of main jet oil note regulates according to engine operation condition.The fuel injection beginning time should as far as possible close to top dead center.According to cylinder bore size and compression ratio height numerical value regulable control at compression process piston stroking upward to budc 8 ° ~ 0 °.According to oil product used, and the factor such as engine size and ambient air temperature, can on oil inlet pipe or the device constent temperature heater of oil nozzle joint, the oil temperature controlling to enter cylinder, more than 200 DEG C, makes the rapid ignition of fuel oil sprayed into.Be conducive to starting fast and the engine stabilizer operation when cold snap.Very high at engine operating temperatures, or when hot environment runs, also can close by heater.
The geometrical compression ratio of motor should be arranged on the peak of theoretical value, preferably controls 30 ~ 40.When adopting pressurized machine, actual effective compression ratio may be higher, improves the indicated thermal efficiency that compression ratio can improve thermodynamic cycle.
Adopt two high pressure oil pump fuel feeding to be beneficial to and spray into fuel oil close to budc, reduce fuel oil as far as possible and do negative work in compression stroke, thus After Top Center produce isochoric combustion, under avoiding high compression ratio, produce high pressure of explosion, but fuel oil does Effective power when piston 2 is descending.
Because the fuel oil of existing about 40%-50% sprays into, the oil mass of main fuel oil spout note reduces.Therefore, the oil spout of atdc can not be dragged very long perdurabgility, is conducive to reducing after-burning, but delivery temperature may improve, and therefore preferably adopts gas turbine blower.In order to make fuel oil and air rapid mixing, cylinder head application spiral inlet duct.
Described embodiment is preferred embodiment of the present invention; but the present invention is not limited to above-mentioned mode of execution; when not deviating from flesh and blood of the present invention, any apparent improvement that those skilled in the art can make, replacement or modification all belong to protection scope of the present invention.
Claims (3)
1. the two-way delivery piston formula internal-combustion engine of a Mechanical course, comprise crankcase (1), suction tude (11), outlet pipe (13), main fuel spray nozzle (12), it is characterized in that, also comprise the first oil pump (4) and the second oil pump (6), the bent axle (3) of described crankcase (1) is connected with first oil pump shaft (5) of the first oil pump (4), and described first oil pump shaft (5) is connected with second oil pump shaft (7) of the second oil pump (6);
The top of described first oil pump (4) is connected with one end of main jet oil pipe (9), the other end of described main jet oil pipe (9) is connected with main fuel spray nozzle (12), and described main fuel spray nozzle (12) is fixedly mounted on the top of crankcase (1) cylinder cap;
The top of described second oil pump (6) is connected with one end of secondary spray bar (8), the other end of described secondary spray bar (8) is connected with secondary oil nozzle (10), described secondary oil nozzle (10) is connected with one end of suction tude (11), and the other end of described suction tude (11) is connected with the intake duct (15) of described crankcase (1) cylinder cap.
2. the two-way delivery piston formula internal-combustion engine of a kind of Mechanical course according to claim 1, it is characterized in that, second oil pump shaft (7) of described second oil pump (6) be configured to piston (2) in intake process come downwards to before bottom dead center 45 °-90 ° make auxiliary jet (14) carry out oil spout; First oil pump shaft (5) of described first oil pump (4) is configured to piston (2) in compression stroke and goes upward to budc 0 °-8 ° and make main nozzle (14) carry out oil spout.
3. the two-way delivery piston formula internal-combustion engine of a kind of Mechanical course according to claim 2, it is characterized in that, described suction tude (11) is also connected with air-strainer (14), described air-strainer (14) is connected with suction tude (11), described suction tude (11) to be fixed in cylinder head and to be communicated with intake duct (15), the elbow of described suction tude (11) is processed with boss (16), described boss (16) is fixed with auxiliary jet (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510400800.7A CN104989532A (en) | 2015-07-09 | 2015-07-09 | Mechanically-controlled bi-direction oil supply piston type internal combustion engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510400800.7A CN104989532A (en) | 2015-07-09 | 2015-07-09 | Mechanically-controlled bi-direction oil supply piston type internal combustion engine |
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| CN104989532A true CN104989532A (en) | 2015-10-21 |
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| CN201510400800.7A Pending CN104989532A (en) | 2015-07-09 | 2015-07-09 | Mechanically-controlled bi-direction oil supply piston type internal combustion engine |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101142403A (en) * | 2005-03-18 | 2008-03-12 | 丰田自动车株式会社 | Dual fuel injection system internal combustion engine |
| CN102418614A (en) * | 2011-08-13 | 2012-04-18 | 镇江恒驰科技有限公司 | Fuel injection control system of flexible fuel engine |
| US20150059709A1 (en) * | 2013-08-28 | 2015-03-05 | Denso Corporation | Fuel pump module |
| CN204738876U (en) * | 2015-07-09 | 2015-11-04 | 申屠淼 | Mechanical control's two -way confession oil piston formula internal -combustion engine |
-
2015
- 2015-07-09 CN CN201510400800.7A patent/CN104989532A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101142403A (en) * | 2005-03-18 | 2008-03-12 | 丰田自动车株式会社 | Dual fuel injection system internal combustion engine |
| CN102418614A (en) * | 2011-08-13 | 2012-04-18 | 镇江恒驰科技有限公司 | Fuel injection control system of flexible fuel engine |
| US20150059709A1 (en) * | 2013-08-28 | 2015-03-05 | Denso Corporation | Fuel pump module |
| CN204738876U (en) * | 2015-07-09 | 2015-11-04 | 申屠淼 | Mechanical control's two -way confession oil piston formula internal -combustion engine |
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Application publication date: 20151021 |