CN108180050B - Anti-splashing crankcase ventilation device - Google Patents
Anti-splashing crankcase ventilation device Download PDFInfo
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- CN108180050B CN108180050B CN201711405913.1A CN201711405913A CN108180050B CN 108180050 B CN108180050 B CN 108180050B CN 201711405913 A CN201711405913 A CN 201711405913A CN 108180050 B CN108180050 B CN 108180050B
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- Prior art keywords
- pipe
- oil
- gear shaft
- crankcase
- gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
- F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/06—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding lubricant vapours
Abstract
The invention discloses a splash-proof crankcase ventilation device, and belongs to the technical field of direct injection engines. The high-pressure oil rail comprises a crankcase, an air cylinder body, an air cylinder cover, an oil sprayer, a high-pressure oil rail, an oil tank and an oil conveying pipe, wherein an exhaust pipe is arranged on the side wall of the crankcase and is connected with an inlet of an air pumping machine, an inner cavity of the air pumping machine is divided into a left cavity and a right cavity through a partition plate, a left impeller and a right impeller are respectively arranged in the left cavity and the right cavity, the left impeller is fixedly connected with a first gear shaft, the first gear shaft rotates through a first bearing and is assembled at one end in a first through hole of the partition plate, the right impeller is fixedly connected with a second gear shaft, the second gear shaft rotates through a second bearing and is assembled at the other end in the first through hole of the partition plate, and the first gear shaft and the second. The invention solves the problems that carbon deposition is generated on the inner walls of the throttle valve and the air inlet pipe of the direct injection engine, and oil in the crank case is easy to splash into the air exhaust pipe along with the violent shaking of the automobile.
Description
Technical Field
The invention belongs to the technical field of direct injection engines in cylinders, and particularly relates to a splash-proof crankcase ventilation device.
Background
At present, most automobile engines are direct injection engines in cylinders, gasoline is directly injected into the cylinders for combustion, power and torque of the engines during high-speed operation are improved, but problems are caused, such as easy carbon deposition of a throttle valve and an air inlet pipe wall. The reason for the generation of carbon deposition is mainly caused by a crankcase ventilation system of an engine, a small amount of exhaust gas leaked into a crankcase is guided into an air inlet pipe by the crankcase ventilation system and is mixed with newly-entered air to enter a cylinder to participate in combustion, and because a small amount of oil vapor in the crankcase enters the air inlet pipe along with the exhaust gas and passes through a throttle valve, the oil vapor can be condensed into oil droplets and is deposited on the inner wall of the throttle valve or the air inlet pipe. For a natural air suction type engine, gasoline is sprayed into an air inlet pipe by a fuel injector, and the deposited liquid drops can be dissolved and removed by the gasoline, so that long-time deposition of engine oil liquid drops is not easy to generate on the inner wall of a throttle valve or the air inlet pipe. However, the direct injection engine does not have the cleaning effect of the gasoline on the engine oil on the throttle valve or the air inlet pipe, so that the engine oil droplets are deposited on the inner wall of the throttle valve or the air inlet pipe for a long time and form carbon deposition, and therefore, the direct injection engine is easier to form the carbon deposition on the throttle valve and the inner wall of the air inlet pipe than a natural air suction engine, and further influences the opening angle of the throttle valve and the air flow rate in the air inlet pipe. In addition, when the crankcase in the engine shakes violently along with the automobile, oil splashed in the crankcase can enter the air suction pipe, and therefore engine oil is led into gasoline to be combusted.
Disclosure of Invention
The invention provides a splash-proof crankcase ventilation device, aiming at solving the defects that carbon deposition is generated on the inner walls of a throttle valve and an air inlet pipe of a direct injection engine in the prior art and oil in a crankcase is easy to splash into an air exhaust pipe along with the violent shaking of an automobile.
In order to achieve the purpose, the invention adopts the following technical scheme:
a splash-proof crankcase ventilation device comprises a crankcase, a cylinder body, a cylinder cover, fuel injectors, a high-pressure fuel rail, a fuel tank and a fuel delivery pipe, wherein the high-pressure fuel rail is respectively communicated with the corresponding fuel injectors of cylinders in a sealing way through connecting branch pipes, the fuel injectors are arranged in the cylinder cover, fuel injection nozzles of the fuel injectors extend into a combustion chamber of the cylinder body, the lower end of the fuel delivery pipe is communicated with an oil pump outlet in the fuel tank in a sealing way, a secondary pressurization pressure pump is arranged on the fuel delivery pipe, a suction pipe is arranged on the side wall of the crankcase and is connected with an inlet of a pump air engine, an inner cavity of the pump air engine is divided into a left cavity and a right cavity through a partition plate, a left impeller and a right impeller are respectively arranged in the left cavity and the right cavity, the left impeller is fixedly connected with a first gear shaft, the first gear shaft rotates through a first bearing and is, the second gear shaft rotates through the second bearing and is assembled at the other end in the first through hole of the partition plate, a sealing sheet is arranged between the first gear shaft and the second gear shaft, and the left cavity and the right cavity are sealed and isolated by the sealing sheet;
the first gear shaft is provided with a first gear and a left impeller at the end part, the second gear shaft is provided with a third gear and a right impeller at the end part, a second through hole of the partition plate is internally and hermetically provided with a third gear shaft, the left end and the right end of the third gear shaft are respectively provided with a second gear and a fourth gear, the second gear is meshed with the first gear, and the fourth gear is meshed with the third gear;
the gas outlet of the left cavity of the gas pumping machine is hermetically connected with a gas delivery branch pipe, the oil outlet of the right cavity of the gas pumping machine is hermetically connected with an oil delivery branch pipe, and the outlet of the gas delivery branch pipe and the outlet of the oil delivery branch pipe are converged together and are hermetically connected with a high-pressure oil rail;
the gas transmission branch pipe is provided with a one-way valve;
a splash-proof pipe which spirally rises is arranged between the crankcase and the exhaust pipe.
Furthermore, one end of the splashing prevention pipe is communicated with the side wall of the upper part of the crankcase in a sealing mode, the other end of the splashing prevention pipe is communicated with the upper end of the return pipe in a sealing mode, and the lower end of the return pipe is communicated with the inlet end of the exhaust pipe in a sealing mode.
Furthermore, the left impeller is over against the air exhaust pipe, and the right impeller is over against the oil delivery pipe.
Further, the cylinder head is mounted on the upper portion of the cylinder block, and the crankcase is mounted on the lower portion of the cylinder block.
Has the advantages that:
1. compared with the mode of naturally leading the waste gas into the gas inlet pipe by depending on the pressure of the waste gas in the crankcase in the prior art, the invention can obviously improve the pumping capacity and the pumping efficiency of the waste gas.
2. The waste gas entering the high-pressure oil rail is mixed with the secondarily pressurized gasoline to form bubbles in a certain proportion in the high-pressure gasoline, the gas pressure in the bubbles is equivalent to the gasoline pressure, when the high-pressure gasoline mixed with the bubbles is sprayed out from an oil nozzle of an oil sprayer, the pressure is reduced, each bubble is broken and generates certain explosive force, the explosive force acts on surrounding gasoline droplets and breaks up the gasoline droplets, the atomization effect of the gasoline in a combustion chamber is better, the gasoline and air are mixed more fully in the combustion chamber, and the combustion efficiency of an engine is improved.
3. The splash-proof pipe is used for preventing oil splashed in the crankcase from entering the exhaust pipe when the crankcase in the engine shakes violently along with the automobile, so that the engine oil is prevented from being introduced into gasoline to be combusted.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a schematic view of a spacer structure according to an embodiment of the present invention;
in the figure: 1-crankcase, 2-cylinder block, 3-cylinder head, 4-fuel injector, 5-high pressure oil rail, 6-fuel tank, 7-fuel delivery pipe, 8-connecting branch pipe, 9-fuel pump, 10-booster pump, 11-exhaust pipe, 12-pump engine, 13-baffle, 131-first through hole, 132-second through hole, 14-left impeller, 15-left impeller, 16-first gear shaft, 17-first bearing, 18-second gear shaft, 19-second bearing, 20-sealing sheet, 21-first gear, 22-third gear, 23-third gear shaft, 24-second gear, 25-fourth gear, 26-fuel delivery branch pipe, 27-fuel delivery branch pipe, 28-one-way valve, 29-splash-proof pipe, 30-return pipe.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
The embodiment provides a splash-proof crankcase ventilation device, as shown in fig. 1, 2 and 3, comprising a crankcase 1, a cylinder block 2, a cylinder head 3, an oil injector 4, a high-pressure oil rail 5, an oil tank 6 and an oil delivery pipe 7, wherein the high-pressure oil rail 5 is hermetically communicated with each corresponding cylinder oil injector 4 through each connecting branch pipe 8, the oil injector 4 is installed in the cylinder head 3, an oil nozzle thereof extends into a combustion chamber of the cylinder block 2, the cylinder head 3 is installed at the upper part of the cylinder block 2, the lower part of the cylinder block 2 is provided with the crankcase 1, the lower end of the oil delivery pipe 7 is hermetically communicated with an outlet of an oil pump 9 in the oil tank 6, the oil delivery pipe 7 is provided with a pressurizing pump 10 for secondary pressurization, the side wall of the crankcase 1 is provided with an air extraction pipe 11, the air extraction pipe 11 is connected with an inlet of an air pump 12, an inner cavity of the air pump 12 is divided into a left cavity and, the left impeller 14 is fixedly connected with a first gear shaft 16, the first gear shaft 16 rotates through a first bearing 17 and is assembled at one end in a first through hole of the partition plate 13, the right impeller 15 is fixedly connected with a second gear shaft 18, the second gear shaft 18 rotates through a second bearing 19 and is assembled at the other end in the first through hole of the partition plate 13, a sealing sheet 20 is arranged between the first gear shaft 16 and the second gear shaft 18, and the left cavity and the right cavity are sealed and isolated by the sealing sheet 20;
a first gear 21 and a left impeller 14 at the end part are arranged on the first gear shaft 16, a third gear 22 and a right impeller 15 at the end part are arranged on the second gear shaft 18, a third gear shaft 23 is assembled in the second through hole of the partition plate 13 in a sealing way, a second gear 24 and a fourth gear 25 are respectively arranged at the left end and the right end of the third gear shaft 23, the second gear 24 is meshed with the first gear 21, the fourth gear 25 is meshed with the third gear 22, the left impeller 14 is over against the suction pipe 11, and the right impeller 15 is over against the oil delivery pipe 7;
the air outlet of the left cavity of the pumping machine 12 is hermetically connected with an air delivery branch pipe 26, the oil outlet of the right cavity of the pumping machine 12 is hermetically connected with an oil delivery branch pipe 27, and the outlets of the air delivery branch pipe 26 and the oil delivery branch pipe 27 are converged together and hermetically connected with the high-pressure oil rail 5;
the gas transmission branch pipe 26 is provided with a one-way valve 28, and the one-way valve 28 only enables the gas flow in the gas transmission branch pipe 26 to move from bottom to top, so that when the air pressure in the gas transmission branch pipe 26 is insufficient, the high-pressure gasoline passing through the oil transmission branch pipe 27 flows back to the left cavity of the air pump 12 or the air suction pipe 11 through the gas transmission branch pipe 26;
a splash-proof pipe 29 which rises spirally is arranged between the crankcase 1 and the extraction pipe 11, one end of the splash-proof pipe 29 is communicated with the side wall of the upper part of the crankcase 1 in a sealing way, the other end of the splash-proof pipe 29 is communicated with the upper end of a return pipe 30 in a sealing way, and the lower end of the return pipe 30 is communicated with the inlet end of the extraction pipe 11 in a sealing way.
The working process of the embodiment is as follows: when the engine works, gasoline is pumped into the oil delivery pipe 7 by the oil pump 9, then the gasoline is pressurized for the second time by the pressure pump 10, because each cylinder injects oil in turn, the gasoline in the oil delivery pipe 7 continuously moves to the right cavity of the gas pumping machine 12 and impacts the right impeller 15, the gasoline passing through the right impeller 15 enters the oil delivery branch pipe 27 and the high-pressure oil rail 5, the gasoline impacts the right impeller 15 to rotate, the right impeller 15 drives the left impeller 14 to rotate through the third gear 22, the fourth gear 25, the second gear 24 and the first gear 21, the left impeller 14 generates suction action and pumps the gas in the crankcase 1 into the left cavity of the gas pumping machine 12, the gas is compressed by the gas pumping machine 12 and then is sent into the gas delivery branch pipe 26, when the pressure at the lower side of the check valve 28 is higher than the pressure at the upper side thereof, the check valve 28 is opened, the waste gas from the crankcase 1 is mixed with the gasoline and then enters the high-pressure oil, and is injected into the combustion chamber of each cylinder block with the injector 4 to participate in combustion.
The gear ratio is set so that the flow rate of the gasoline in the oil delivery pipe 7 and the oil delivery branch pipe 27 and the pumping amount of the left impeller 14 in unit time are in a certain proportion, and the faster the flow rate of the gasoline is, the higher the engine speed is, the more the exhaust gas is blown into the crankcase 1 from the piston rings of the cylinders, and the pumping amount is increased along with the increase of the rotating speeds of the left and right impellers 14 and 15, so that the exhaust gas discharge speed is in direct proportion to the engine speed. Conversely, if the fuel delivery rate decreases and the engine speed decreases, the exhaust gas pumping rate or the exhaust gas discharge rate decreases accordingly. Compared with the mode of naturally leading the waste gas to the air inlet pipe by depending on the pressure of the waste gas in the crankcase 1 in the prior art, the invention can obviously improve the pumping capacity and the pumping efficiency of the waste gas.
The waste gas entering the high-pressure oil rail 5 is mixed with the secondarily pressurized gasoline to form bubbles in a certain proportion in the high-pressure gasoline, the gas pressure in the bubbles is equivalent to the gasoline pressure, when the high-pressure gasoline mixed with the bubbles is sprayed out from the oil nozzle of the oil sprayer 4, the pressure is reduced, each bubble is broken and generates certain explosive force, the explosive force acts on surrounding gasoline droplets and breaks up the droplets, the atomization effect of the gasoline in the combustion chamber of the cylinder body 2 is better, the gasoline and the air are mixed more fully in the combustion chamber, and the combustion efficiency of an engine is improved.
A splash-proof pipe 29 which rises spirally is arranged between the crankcase 1 and the exhaust pipe 11, and the splash-proof pipe 29 is used for preventing oil splashed in the crankcase 1 from entering the exhaust pipe 11 when the crankcase 1 in the engine shakes violently along with the discovery of an automobile, so that the engine oil is prevented from being introduced into gasoline to be combusted.
The limitation of the protection scope of the present invention is understood by those skilled in the art, and various modifications or changes which can be made by those skilled in the art without inventive efforts based on the technical solution of the present invention are still within the protection scope of the present invention.
Claims (3)
1. The utility model provides a prevent splashing type crankcase ventilation unit, it includes crankcase (1), cylinder block (2), cylinder head (3), sprayer (4), high-pressure oil rail (5), oil tank (6) and defeated oil pipe (7), high-pressure oil rail (5) are through each connecting branch (8) respectively with each jar sprayer (4) sealed intercommunication that corresponds, sprayer (4) are installed in cylinder head (3), and in its fuel sprayer stretched into the combustion chamber of cylinder block (2), defeated oil pipe (7) lower extreme and oil pump (9) export sealed intercommunication in oil tank (6), defeated oil pipe (7) facial make-up is equipped with secondary compression's force (forcing) pump (10), its characterized in that: the side wall of the crankcase (1) is provided with an exhaust pipe (11), the exhaust pipe (11) is connected with an inlet of an air pumping machine (12), an inner cavity of the air pumping machine (12) is divided into a left cavity and a right cavity through a partition plate (13), a left impeller (14) and a right impeller (15) are respectively arranged in the left cavity and the right cavity, the left impeller (14) is fixedly connected with a first gear shaft (16), the first gear shaft (16) rotates through a first bearing (17) and is assembled at one end in a first through hole of the partition plate (13), the right impeller (15) is fixedly connected with a second gear shaft (18), the second gear shaft (18) rotates through a second bearing (19) and is assembled at the other end in the first through hole of the partition plate (13), a sealing sheet (20) is arranged between the first gear shaft (16) and the second gear shaft (18), and the left side is driven by the sealing sheet (20), the right two cavities are sealed and isolated;
the first gear shaft (16) is provided with a first gear (21) and a left impeller (14) at the end part, the second gear shaft (18) is provided with a third gear (22) and a right impeller (15) at the end part, a third gear shaft (23) is hermetically assembled in a second through hole of the partition plate (13), the left end and the right end of the third gear shaft (23) are respectively provided with a second gear (24) and a fourth gear (25), the second gear (24) is meshed with the first gear (21), and the fourth gear (25) is meshed with the third gear (22);
the air outlet of the left cavity of the pumping machine (12) is hermetically connected with the air delivery branch pipe (26), the oil outlet of the right cavity of the pumping machine (12) is hermetically connected with the oil delivery branch pipe (27), and the outlet of the air delivery branch pipe (26) and the outlet of the oil delivery branch pipe (27) are converged together and are hermetically connected with the high-pressure oil rail (5);
the gas transmission branch pipe (26) is provided with a one-way valve (28);
a splash-proof pipe (29) which spirally rises is arranged between the crankcase (1) and the exhaust pipe (11); one end of the splashing preventing pipe (29) is communicated with the side wall of the upper part of the crankcase (1) in a sealing way, the other end of the splashing preventing pipe (29) is communicated with the upper end of the return pipe (30) in a sealing way, and the lower end of the return pipe (30) is communicated with the inlet end of the exhaust pipe (11) in a sealing way; the upper end of the return pipe (30) is higher than the communication part of the anti-splashing pipe (29) and the crankcase (1).
2. The anti-slosh crankcase ventilation device of claim 1, wherein: the left impeller (14) is over against the air exhaust pipe (11), and the right impeller (15) is over against the oil delivery pipe (7).
3. The anti-slosh crankcase ventilation device of claim 1, wherein: the cylinder cover (3) is arranged at the upper part of the cylinder body (2), and the lower part of the cylinder body (2) is provided with the crankcase (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711405913.1A CN108180050B (en) | 2017-12-22 | 2017-12-22 | Anti-splashing crankcase ventilation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711405913.1A CN108180050B (en) | 2017-12-22 | 2017-12-22 | Anti-splashing crankcase ventilation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108180050A CN108180050A (en) | 2018-06-19 |
| CN108180050B true CN108180050B (en) | 2020-09-15 |
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ID=62546778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711405913.1A Active CN108180050B (en) | 2017-12-22 | 2017-12-22 | Anti-splashing crankcase ventilation device |
Country Status (1)
| Country | Link |
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| CN (1) | CN108180050B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004031281B4 (en) * | 2004-06-29 | 2016-09-15 | Man Truck & Bus Ag | Device for returning crankcase ventilation gases into the combustion chamber of a supercharged internal combustion engine |
| JP4329084B2 (en) * | 2005-11-04 | 2009-09-09 | 株式会社デンソー | Control device for accumulator fuel system |
| US7594501B2 (en) * | 2006-12-22 | 2009-09-29 | Dichtungstechnik G. Bruss Gmbh & Co., Kg | Cylinder head cover for an internal combustion engine |
| CN201554525U (en) * | 2009-10-27 | 2010-08-18 | 重庆长安汽车股份有限公司 | Crankcase ventilation system of hydrogen-powered engine |
| US8807097B2 (en) * | 2010-01-27 | 2014-08-19 | Cummins Filtration Ip Inc. | Closed crankcase ventilation system |
| US9279372B2 (en) * | 2013-06-27 | 2016-03-08 | Serge V. Monros | Multi-fuel system for internal combustion engines |
| CN204344199U (en) * | 2014-11-16 | 2015-05-20 | 重庆交通大学 | The centrifugal adsorption oil-gas separating device for engine of lubricating oil emulsion phenomenon can be slowed down |
| CN105501732B (en) * | 2016-01-21 | 2017-08-18 | 绵阳历泰机械制造有限公司 | Oil tank anti-rock oil level transmitter |
| CN206071683U (en) * | 2016-08-31 | 2017-04-05 | 朱升 | A kind of oil-gas separating device of engine |
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2017
- 2017-12-22 CN CN201711405913.1A patent/CN108180050B/en active Active
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| CN108180050A (en) | 2018-06-19 |
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