CN212296591U - Automatically controlled piston oil spout cooling system and fuel sprayer - Google Patents
Automatically controlled piston oil spout cooling system and fuel sprayer Download PDFInfo
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- CN212296591U CN212296591U CN202020972543.0U CN202020972543U CN212296591U CN 212296591 U CN212296591 U CN 212296591U CN 202020972543 U CN202020972543 U CN 202020972543U CN 212296591 U CN212296591 U CN 212296591U
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Abstract
The utility model relates to an automatically controlled piston oil spout cooling system and fuel sprayer through the two oil spout working methods of piston bottom fuel sprayer, realizes cooling oil pocket and piston bottom difference cooling effect in the piston. The oil nozzle adopts an inner nozzle and oil nozzle outer sleeve double-oil-spraying mode, a plurality of obliquely upward outer spray holes are distributed on the side face of the tail section of the oil nozzle outer sleeve along the circumferential direction, and the plurality of outer spray holes form an outer annular nozzle. The utility model discloses can realize cold oil pocket and piston bottom respectively the lubricating oil spout in the piston to increase the lubricated condition of piston and cylinder liner when the heater improves cold start, improve the thermal efficiency of internal-combustion engine.
Description
The technical field is as follows:
the utility model belongs to the technical field of the internal-combustion engine, specific theory, the utility model relates to an automatically controlled piston oil spout cooling system and fuel sprayer.
Background art:
when the internal combustion engine works, friction is generated between the surfaces of the moving parts due to the existence of relative high-speed motion. If the metal surface is directly rubbed, not only the internal power loss of the internal combustion engine is increased, but also the friction surface is rapidly abraded, and simultaneously, a large amount of heat generated by the friction can cause the working surfaces of certain parts to be melted, so that the internal combustion engine cannot normally work. In order to ensure the normal operation of the internal combustion engine, the surfaces of the relatively moving parts must be lubricated to form a lubricating oil film between the parts, and direct friction is changed into indirect liquid friction so as to reduce abrasion and power loss. Modern internal combustion engine lubrication systems are divided into pressure lubrication and splash lubrication: the oil pump sucks the engine oil from the oil pan, the engine oil is delivered to the oil pump through the strainer, and the engine oil is delivered to the oil filter to be filtered and then is pressed into the main oil duct. Part of engine oil in the main oil duct enters a main shaft bushing and a main shaft neck through each crankshaft main bearing oil duct and then enters a connecting rod shaft neck through an inclined oil hole; the other part of the lubricating oil goes up to enter a camshaft sleeve and a valve rocker shaft bushing to perform pressure lubrication on all friction surfaces. When the crankshaft rotates, splashed oil droplets and oil mist lubricate the cylinder walls, the piston and the piston ring surfaces. When the internal combustion engine works, the working conditions and the working states of various parts of the internal combustion engine are different, and the system has different requirements on the lubricating and cooling degrees of the piston, so that the piston of the current high-load internal combustion engine is cooled frequently by injecting lubricating oil into an inner cooling oil cavity in the piston by using a nozzle at the bottom of the piston, and the lubricating oil is supplied by the pressure of an oil pump; and the lubrication between the piston and the cylinder sleeve is realized by splash lubrication.
In the prior art, cooling engine oil is vertically and upwards injected into an oil injection cavity in a piston through an oil injection nozzle and cannot effectively cool the bottom of the piston; or the oil injection mode of the single nozzle which is obliquely injected upwards is directly adopted, so that the problems of insufficient cooling area of the engine oil and low cooling efficiency exist.
Therefore, there is a need to improve cooling of the cold oil gallery in the piston and the bottom of the piston, and to improve lubrication of the piston and the liner during cold start.
The utility model has the following contents:
the utility model discloses a not enough to prior art, the utility model discloses an automatically controlled piston oil spout cooling system and fuel sprayer realizes cold oil pocket and piston bottom respectively the lubricating oil spout in the piston through changing the fuel sprayer structure, changing the structure that the machine oil said and increasing solenoid valve switch etc to increase the lubricated condition of piston and cylinder liner when the heater improves cold start, improve the thermal efficiency of internal-combustion engine.
According to the not enough and improvement thinking that express current system above, the utility model discloses the technical scheme who adopts is: the utility model provides a cooling system of automatically controlled piston oil spout, includes automatically controlled oil pump, fuel sprayer, and oil cleaner gets into the main oil gallery through the oil cooler, its characterized in that:
a heating oil duct connected with an inlet of an oil spray nozzle is arranged between an oil filter and an oil cooler, an oil heater is arranged in the heating oil duct, a thermal electromagnetic valve switch is arranged on a pipeline close to the inlet of the oil heater, an auxiliary oil duct is arranged at the connecting position of the oil heater and the inlet of the oil spray nozzle and connected to a main oil duct, and a cold electromagnetic valve switch is arranged on the auxiliary oil duct;
the oil nozzle adopts a double-oil-spraying mode of an inner nozzle and an oil nozzle outer sleeve, the oil nozzle outer sleeve is added outside the inner nozzle, two ends of the oil nozzle outer sleeve are closed, a sealing hole communicated with a nozzle branch oil duct is arranged at the front part of the oil nozzle outer sleeve, the nozzle branch oil duct is used for communicating an oil storage space of the oil nozzle outer sleeve with an oil nozzle main oil duct through the sealing hole, and an oil nozzle electromagnetic valve switch is arranged on the nozzle branch oil duct; the nozzle main oil duct is directly communicated with the inner nozzle, the nozzle branch oil duct leads out an oil storage space communicated with the oil nozzle outer sleeve from the side of the nozzle main oil duct, an inlet of the nozzle main oil duct is connected with an outlet of an engine oil heater, a plurality of inclined upward outer spray holes are distributed on the side surface of the tail section of the oil nozzle outer sleeve along the circumferential direction, and the plurality of outer spray holes form an outer annular nozzle.
A pressure sensor and a temperature sensor are arranged behind the engine oil heater, three electromagnetic valve switches are controlled to be switched on and off by an automobile ECU, and the automobile ECU can acquire working condition data information of an engine oil pump and the engine oil heater and can acquire related data information of the pressure sensor and the temperature sensor arranged behind the engine oil heater. The ECU controls the cooling system to realize the working state of the maximum power of the internal combustion engine.
The oil nozzle appearance design adopts interior nozzle and outer annular nozzle dual oil spray mode, and wherein former nozzle appearance is unchangeable, adds the outer tube and links to each other with a branch oil duct in its outside, and the angle of a plurality of outer orifices tilt up differs, and a plurality of outer orifice injection angles that are close to cylinder inner wall are unanimous, and a plurality of outer orifice injection angles that remain to keep away from cylinder inner wall are unanimous, and piston bottom to cylinder bottom intermediate position when all outer orifice injection angles are the top dead point.
An oil nozzle for cooling a piston oil spray adopts a dual oil spray mode of an inner nozzle and an oil nozzle outer sleeve, the inner nozzle is directly communicated with an oil nozzle main oil duct, the oil nozzle outer sleeve is connected with the oil nozzle main oil duct through an oil nozzle branch oil duct, the oil nozzle outer sleeve is sleeved outside the inner nozzle, two ends of the oil nozzle outer sleeve are closed, a sealing hole communicated with the oil nozzle branch oil duct is arranged at the front part of the oil nozzle outer sleeve, an oil storage space of the oil nozzle outer sleeve is communicated with the oil nozzle main oil duct through the sealing hole by the oil nozzle branch oil duct, and an oil nozzle electromagnetic valve switch is arranged on the oil nozzle branch oil duct; the nozzle branch oil duct is led out of an oil storage space communicated with an oil nozzle outer sleeve from the side of the nozzle main oil duct, a plurality of inclined outer spray holes are distributed on the side face of the tail section of the oil nozzle outer sleeve along the circumferential direction, and the plurality of outer spray holes form an outer annular nozzle.
And when all the injection angles of the outer spray holes are the top dead center, the bottom of the piston reaches the middle position of the bottom of the cylinder.
The tail end of the outer sleeve of the oil nozzle is shorter than that of the inner nozzle.
The utility model is suitable for an automatically controlled lubricated cooling system to the friction merit, under various operating modes, after carrying out experimental design through multiple scheme, the pressure control scheme that obtains maximum power and correspond according to the engine pedestal experiment is the optimal scheme promptly.
Compared with the prior art, the beneficial effects of the utility model are that:
the structure of the oil nozzle is innovatively changed, an inner nozzle and an outer annular nozzle are adopted for double oil injection, one part of lubricating oil is used for entering the inner cooling oil cavity of the piston by the inner nozzle and the outer nozzle, the other part of the lubricating oil is sprayed to the bottom of the piston for cooling, the effects of respectively cooling the inner cooling oil cavity and the bottom of the piston and optimizing the cooling are achieved, insufficient cooling or excessive cooling is avoided, and the dynamic property and the economical efficiency of the internal combustion engine are improved. The utility model discloses the system can not only cool down the system also can preheat system machine oil, can play the effect that reduces friction to the vice lubrication of piston and cylinder liner friction when cold start, makes the cold start smooth.
The double-oil nozzle structure form, a plurality of outer spray holes on the outer annular nozzle can adjust the oil injection direction, and the oil injection quantity can also be adjusted by controlling the opening degree of the oil injection nozzle electromagnetic valve switch.
Drawings
FIG. 1 is a schematic diagram of a structure of an electronically controlled piston oil injection cooling system.
Fig. 2 is a modification view of the oil jet 12.
FIG. 3 is a front sectional view of a modified fuel injector.
FIG. 4 is a top sectional view of a retrofit fuel injector annular nozzle position.
The labels in the above figures are: 1. an oil pan; 2. an engine oil strainer; 3. a variable-displacement electric control oil pump; 4. an oil filter; 5. an oil cooler; 6. an engine oil heater; 7. a thermal electromagnetic valve switch; 8. a cold solenoid valve switch; 9. a secondary oil gallery; 10. a main oil gallery; 11. a piston; 12. an oil jet; 13. other components connected to the main oil gallery; 14. an automotive ECU; 15. a heating oil duct; 16. a pressure sensor; 17. a nozzle branch oil passage; 18. an oil nozzle electromagnetic valve switch; 19. an outer sleeve of the oil nozzle; 20. an inner nozzle; 21. spraying an outer orifice; 22 temperature sensor.
Detailed Description
The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings, which are provided to assist those skilled in the art in more complete, accurate and thorough understanding of the concept and technical solution of the present invention, and to facilitate the implementation thereof.
Referring to fig. 1, the utility model provides an oil injection cooling system of an electric control piston, which comprises a variable displacement electric control oil pump 3 and an oil injection nozzle 12, an oil strainer 2 is connected with the variable displacement electric control oil pump 3, the outlet of the variable displacement electric control oil pump 3 is connected with an oil filter 4, the oil filter enters a main oil duct 10 through an oil cooler 5, a heating oil channel 15 connected with the inlet of the oil nozzle 12 is arranged between the oil filter 4 and the oil cooler 5, and an oil heater 6 is arranged in the heating oil channel, a thermal electromagnetic valve switch 7 is arranged on a pipeline close to the inlet of the engine oil heater 6, a pressure sensor 16 and a temperature sensor 22 are arranged behind the engine oil heater 6, an auxiliary oil duct 9 is arranged at the connecting position of the engine oil heater 6 and the inlet of the oil nozzle 12, the secondary oil gallery is connected to the main oil gallery, and a cold solenoid valve switch 8 is mounted on the secondary oil gallery 9. The existing main oil gallery can lead out a plurality of auxiliary oil galleries for the operation of the internal combustion engine, and the main oil gallery is also connected with other parts 13 connected on the main oil gallery, which do not belong to the protection content of the application.
Fig. 2 to 4 are specific structural diagrams of the oil nozzle 12, the oil nozzle 12 adopts a double-oil-injection mode of an inner nozzle 20 and an oil nozzle outer sleeve 19, wherein the outer shape of the inner nozzle 20 is consistent with that of the existing oil nozzle, the oil nozzle outer sleeve 19 is added on the outer part of the inner nozzle, the oil nozzle outer sleeve 19 (see fig. 3 and 4) is a hollow pipe, the inner diameter of the hollow pipe is slightly larger than the outer diameter of the inner nozzle 20, so that the inner nozzle can be sleeved in the hollow pipe, a gap is formed between the inner nozzle and the hollow pipe, the inner nozzle can be sleeved in the annular hollow pipe without falling, the area between the inner diameter of the oil nozzle outer sleeve and the outer diameter of the inner nozzle is a hollow oil storage space, the front end surface of the oil nozzle outer sleeve is closed, a sealing hole communicated with a nozzle branch oil duct 17 is arranged on the front part of the; the nozzle main oil gallery is directly communicated with an inner nozzle 20, the nozzle branch oil gallery 17 leads out a hollow area communicated with an oil nozzle outer sleeve 19 from the side of the nozzle main oil gallery, an inlet of the oil nozzle main oil gallery is connected with an outlet of the engine oil heater 6, and an oil nozzle electromagnetic valve switch 18 (see figure 2) is installed on the nozzle branch oil gallery 17; the ascending outer orifice 21 of 6 slants that distributes on the injection nozzle outer tube 19 tip, a plurality of outer orifices form outer annular nozzle, 6 outer orifices distribute on the terminal side of injection nozzle outer tube, because injection nozzle 12 does not distribute in cylinder bottom intermediate position department, so 6 outer orifice angles differ, 3 outer orifice injection angles that are close to cylinder inner wall are unanimous, 3 outer orifice injection angles of keeping away from cylinder inner wall are unanimous, piston bottom to cylinder bottom intermediate position when 6 outer orifice injection angles are the top dead center.
The tail end of the inner nozzle is aligned with an inlet of an inner cooling oil cavity on the bottom surface of the piston, the tail end of the outer sleeve of the oil nozzle is shorter than the tail end of the inner nozzle, the outer sleeve of the oil nozzle can also be a hollow pipe with a certain thickness, the hollow pipe is sleeved outside the inner nozzle, the two ends of the inner nozzle, which are in contact with the pipe wall of the hollow pipe, are welded and sealed, an oil storage space is formed between the inner nozzle and the hollow pipe, a sealing hole is formed in the front of the hollow pipe, and the. The long-term life problem is considered to the oil nozzle outer tube, adopts metal material (for example 45 # steel) and has 2mm fuel feeding circulation clearance with interior nozzle between, and the thickness in oil storage space is about 2mm promptly.
In this application with before interior nozzle and fuel sprayer main oil gallery connected direction, interior nozzle export is the end.
The engine oil heater 6 and 3 electromagnetic valve switches (a thermal electromagnetic valve switch 7, a cold electromagnetic valve switch 8 and an oil nozzle electromagnetic valve switch 18) are controlled by the ECU;
meanwhile, the engine oil heater 6 transmits the working condition data information to the automobile ECU14, and the automobile ECU14 controls the on-off of the switches of the 3 electromagnetic valves, so that the purpose of an electronic control piston oil injection cooling system is achieved, and the working state of the maximum power of the internal combustion engine is realized.
The hot electromagnetic valve switch 7 can select a BURKERT proportional electromagnetic valve 419762 with specification model, and the cold electromagnetic valve switch 8 and the oil nozzle electromagnetic valve switch 18 can select a ZCG-B series pilot piston type high-temperature electromagnetic valve.
The engine oil heater 6 can be a diesel engine oil heater 4009347 original part and is directly inserted into the heating oil channel 15 and sealed.
The outer diameter of the inner nozzle is about phi 6mm, the inner diameter of the outer sleeve of the oil nozzle is about phi 8mm, the outer diameter is about phi 10mm, and the outer sleeve of the oil nozzle is wrapped outside the inner nozzle and does not slide and deform.
The types of the rest products can be based on the type of the Weichai WP12 internal combustion engine device, and the connection mode of the automobile ECU and each device adopts the prior art, so that the electric connection control can be realized.
The utility model discloses automatically controlled piston oil spout cooling system's working method does:
(1) working mode of cold start working condition:
defining 70 ℃ as a switching critical temperature, and setting the temperature value fed back by the temperature sensor 22 behind the engine oil heater as the basis for switching on and off 3 electromagnetic valve switches; when the temperature value of the engine oil is lower than the switching critical temperature, the hot electromagnetic valve switch 7 is opened, the oil nozzle electromagnetic valve switch 18 is opened, the cold electromagnetic valve switch 8 is closed, when the temperature of the engine oil is higher than the switching critical temperature, the hot electromagnetic valve switch 7 is closed, the cold electromagnetic valve switch 8 is opened, and the oil nozzle electromagnetic valve switch 18 is indirectly opened and closed (the oil nozzle electromagnetic valve switch 18 is opened near a lower dead point of a piston, annular oil injection is injected at the bottom of the piston when the piston is at the lower dead point, the bottom of the piston is cooled, the time for opening the oil nozzle electromagnetic valve switch 18 is determined by that the annular oil injection position is in the range of the bottom of the piston, and when the oil injection position is not in the range of the bottom of the;
when the engine oil is in cold start, the temperature of the engine oil is lower and lower than the switching critical temperature, the corresponding electromagnetic valve is controlled to act by the mode, the thermal electromagnetic valve switch 7 is opened, the oil nozzle electromagnetic valve switch 18 is opened, the cold electromagnetic valve switch 8 is closed, the oil temperature is heated and is transmitted to the oil nozzle 12, the oil is sprayed out from the inner nozzle and the oil nozzle outer sleeve, the oil spraying pressure is equal to the oil spraying pressure during normal work, the lubricating oil sprayed out from the inner nozzle plays a role in heating the piston, the lubricating oil sprayed out from the oil nozzle outer sleeve has certain temperature before entering the friction interface of the piston cylinder sleeve, the viscosity of the lubricating oil is reduced, and the. In order to stabilize the pressure of the heating oil passage at the time of cold start, the pressure sensor 16 transmits a pressure value to the ECU14, and the ECU14 adjusts the opening degree of the thermo-electromagnetic valve switch 7 according to the pressure value so as to keep the pressure of the heating oil passage 15 stable.
(2) The working mode of the normal working condition is as follows:
1) firstly, a bench test is carried out on the working conditions of the internal combustion engine with different rotating speeds and different loads in advance, the main oil gallery pressure is obtained through a main oil gallery pressure sensor of the internal combustion engine, the main oil gallery pressure and the working conditions (rotating speed and load) of the internal combustion engine are combined, the test is carried out on the basis that the internal combustion engine obtains the maximum power, and an optimal pressure scheme corresponding to the working conditions of the internal combustion engine is selected.
2) When the engine is in a medium and small load working condition, the oil injection cooling of the piston does not work, the power loss of the variable-displacement electric control oil pump can be reduced, and the hot electromagnetic valve switch 7 and the cold electromagnetic valve switch 8 are closed at the moment.
3) When the engine is in a higher load working condition, the temperature of the oil is reduced through the engine oil cooler 5 by closing the hot electromagnetic valve switch 7, opening the cold electromagnetic valve switch 8 and indirectly opening and closing the oil nozzle electromagnetic valve switch 18, at the moment, the switching critical temperature also becomes the basis of the engine oil heater switch, and the electric control of the engine oil heater 6 is realized. The indirect opening and closing are mainly used for controlling the oil injection time of the outer nozzle, so that engine oil can be accurately injected to the range of the bottom of the piston to be cooled and is not injected to a cylinder sleeve to cause waste when the piston moves up and down, the oil injection quantity of the inner nozzle and the oil injection quantity of the outer nozzle are controlled at the same time, a small amount of oil is sprayed out from the outer spray hole 21 to cool the skirt part of the piston, and the rest of engine oil is sprayed out from the inner nozzle to cool the piston. The pressure of the main oil gallery is fed back to an ECU14 by a pressure sensor of the internal combustion engine, and the variable displacement electric control oil pump is electrically controlled, which is the prior art, and is detailed in the variable displacement technology [ J ] of internal combustion engine energy saving and displacement reduction, 2012(06):9-13 ] of references [ Xiaozhongzhi, Deng peak ], internal combustion engine and accessories, so that the pressure of each oil gallery is kept stable.
Specifically, when in cold start, the hot electromagnetic valve switch 7 is opened, the oil nozzle electromagnetic valve switch 18 is opened, the cold electromagnetic valve switch 8 is closed, and heated high-temperature oil is sprayed out from the inner nozzle to ensure that the oil has a certain temperature before entering a piston cylinder sleeve, and meanwhile, the automobile ECU enables the pressure of a heating oil passage to be kept stable, so that the cold start is smoother, the working loss of the internal combustion engine is reduced, the engine oil thermal efficiency when the internal combustion engine normally works is improved, and the problems of difficult start, high emission and the like when the automobile is in cold start are solved; when the internal combustion engine is in a higher load working condition, the thermal electromagnetic valve switch 7 is closed, the cold electromagnetic valve switch 8 is opened, and the oil nozzle electromagnetic valve switch 18 is indirectly opened and closed, so that a small amount of oil is sprayed out from an outer spray hole to cool the skirt part of the piston, and the rest of oil is sprayed out from an inner spray hole to cool the piston, thereby realizing the change of the oil spraying direction, changing the existing single-direction-aligned piston inner cooling oil cavity or single-direction inclined spraying cooling into a common cooling mode of the piston and the skirt part of the piston, reducing the loss of the piston under the high load working condition, reducing the mechanical loss power, keeping the whole engine to operate at the maximum power, and improving.
The utility model discloses the nothing is mentioned the part and is applicable to prior art.
Claims (7)
1. The utility model provides an automatically controlled piston oil spout cooling system, includes automatically controlled oil pump, fuel sprayer, and oil cleaner gets into main oil gallery through the oil cooler, its characterized in that:
a heating oil duct connected with an inlet of an oil spray nozzle is arranged between an oil filter and an oil cooler, an oil heater is arranged in the heating oil duct, a thermal electromagnetic valve switch is arranged on a pipeline close to the inlet of the oil heater, an auxiliary oil duct is arranged at the connecting position of the oil heater and the inlet of the oil spray nozzle and connected to a main oil duct, and a cold electromagnetic valve switch is arranged on the auxiliary oil duct;
the oil nozzle adopts a double-oil-spraying mode of an inner nozzle and an oil nozzle outer sleeve, the oil nozzle outer sleeve is added outside the inner nozzle, two ends of the oil nozzle outer sleeve are closed, a sealing hole communicated with a nozzle branch oil duct is arranged at the front part of the oil nozzle outer sleeve, the nozzle branch oil duct is used for communicating an oil storage space of the oil nozzle outer sleeve with an oil nozzle main oil duct through the sealing hole, and an oil nozzle electromagnetic valve switch is arranged on the nozzle branch oil duct; the nozzle main oil duct is directly communicated with the inner nozzle, the nozzle branch oil duct leads out an oil storage space communicated with the oil nozzle outer sleeve from the side of the nozzle main oil duct, a plurality of inclined upward outer spray holes are distributed on the side surface of the tail section of the oil nozzle outer sleeve along the circumferential direction, and the plurality of outer spray holes form an outer annular nozzle.
2. The cooling system according to claim 1, wherein a pressure sensor and a temperature sensor are installed behind the oil heater, the three solenoid valves are controlled by an automobile ECU to be turned on and off, and the automobile ECU can acquire data information of working conditions of the oil pump and the oil heater and can acquire data information related to the pressure sensor and the temperature sensor installed behind the oil heater.
3. The cooling system as claimed in claim 1, wherein the plurality of outer nozzle holes are inclined upward at different angles, the plurality of outer nozzle holes close to the inner wall of the cylinder have the same injection angle, the remaining plurality of outer nozzle holes far from the inner wall of the cylinder have the same injection angle, and all the injection angles of the outer nozzle holes are from the bottom of the piston to the middle of the bottom of the cylinder at the top dead center.
4. The cooling system of claim 1, wherein the outer sleeve of the oil nozzle is a hollow tube, the inner diameter of the hollow tube is larger than the outer diameter of the inner nozzle, and six outer spray holes which are inclined upwards are distributed on the tail section of the outer sleeve of the oil nozzle.
5. The oil nozzle is characterized in that the oil nozzle adopts a double-oil-spraying mode of an inner nozzle and an oil nozzle outer sleeve, the inner nozzle is directly communicated with an oil nozzle main oil duct, the oil nozzle outer sleeve is connected with the oil nozzle main oil duct through an oil nozzle branch oil duct, the oil nozzle outer sleeve is sleeved outside the inner nozzle, two ends of the oil nozzle outer sleeve are closed, a sealing hole communicated with the nozzle branch oil duct is formed in the front part of the oil nozzle outer sleeve, the nozzle branch oil duct communicates an oil storage space of the oil nozzle outer sleeve with the oil nozzle main oil duct through the sealing hole, and an oil nozzle electromagnetic valve switch is installed on the nozzle branch oil duct; the nozzle branch oil duct is led out of an oil storage space communicated with an oil nozzle outer sleeve from the side of the nozzle main oil duct, a plurality of inclined outer spray holes are distributed on the side face of the tail section of the oil nozzle outer sleeve along the circumferential direction, and the plurality of outer spray holes form an outer annular nozzle.
6. The fuel injector of claim 5, wherein the bottom of the piston is centered with respect to the bottom of the cylinder at all outer orifice injection angles at top dead center.
7. The fuel injector of claim 5, wherein the outer sleeve end of the fuel injector is shorter than the inner nozzle end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202020972543.0U CN212296591U (en) | 2020-06-01 | 2020-06-01 | Automatically controlled piston oil spout cooling system and fuel sprayer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020972543.0U CN212296591U (en) | 2020-06-01 | 2020-06-01 | Automatically controlled piston oil spout cooling system and fuel sprayer |
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| CN212296591U true CN212296591U (en) | 2021-01-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111472874A (en) * | 2020-06-01 | 2020-07-31 | 河北工业大学 | Electronic control piston oil injection cooling system and working method thereof |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111472874A (en) * | 2020-06-01 | 2020-07-31 | 河北工业大学 | Electronic control piston oil injection cooling system and working method thereof |
| CN111472874B (en) * | 2020-06-01 | 2024-07-05 | 河北工业大学 | Electric control piston oil injection cooling system and working method thereof |
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