CN114046217A - Direct-injection gas nozzle in diesel engine electric control cylinder and complete machine control method thereof - Google Patents
Direct-injection gas nozzle in diesel engine electric control cylinder and complete machine control method thereof Download PDFInfo
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- CN114046217A CN114046217A CN202111232548.5A CN202111232548A CN114046217A CN 114046217 A CN114046217 A CN 114046217A CN 202111232548 A CN202111232548 A CN 202111232548A CN 114046217 A CN114046217 A CN 114046217A
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- 238000002347 injection Methods 0.000 title claims abstract description 63
- 239000007924 injection Substances 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000446 fuel Substances 0.000 claims abstract description 40
- 238000005461 lubrication Methods 0.000 claims abstract description 3
- 239000007789 gas Substances 0.000 claims description 190
- 239000002283 diesel fuel Substances 0.000 claims description 47
- 238000007789 sealing Methods 0.000 claims description 33
- 239000007921 spray Substances 0.000 claims description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- 238000002485 combustion reaction Methods 0.000 claims description 12
- 239000002737 fuel gas Substances 0.000 claims description 9
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 6
- 239000003063 flame retardant Substances 0.000 claims description 6
- 230000001050 lubricating effect Effects 0.000 claims description 6
- 238000007790 scraping Methods 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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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
- F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
- F02M43/04—Injectors peculiar thereto
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/401—Controlling injection timing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D2041/389—Controlling fuel injection of the high pressure type for injecting directly into the cylinder
-
- 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
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
Abstract
The invention provides a direct injection gas nozzle in an electric control cylinder of a diesel engine and a control method of the whole machine of the direct injection gas nozzle, and particularly relates to a design of the direct injection gas nozzle in the electric control cylinder of the diesel engine and a control method of the whole machine operation of the direct injection gas nozzle in the electric control cylinder of the diesel engine. The direct injection gas nozzle in the cylinder adopts a piston type friction pair structure to realize the direct injection in the gas fuel cylinder of the diesel engine nozzle, solves the problems of lubrication and cooling of the gas nozzle through reasonable oil inlet and return and gas pipeline design, and ensures the reliability and durability of the gas nozzle; meanwhile, the invention provides a method for controlling the operation of the whole direct injection gas nozzle in the electric control cylinder of the diesel engine, and the stable operation of the gas nozzle of the diesel engine and the whole direct injection gas nozzle is realized through the specific control of the electric control unit.
Description
Technical Field
The invention provides a direct injection gas nozzle in an electric control cylinder of a diesel engine and a complete machine control method thereof, in particular relates to the design of the direct injection gas nozzle in the electric control cylinder of the diesel engine and a complete machine operation control method of the direct injection gas nozzle in the electric control cylinder of the diesel engine, and belongs to the field of internal combustion engines.
Background
Nowadays, the problem of environmental pollution is increasingly the focus of people's attention, and with the research and development of global new energy automobile technology, the development of new energy electric automobiles, fuel cell automobiles and hybrid electric automobiles reduces the environmental pollution to a certain extent, but the various automobiles still have shortcomings compared with reciprocating internal combustion engine automobiles, and the preservation quantity of the reciprocating internal combustion engine automobiles still occupies the top of the world all the year round. How to reduce the exhaust pollutant emission of reciprocating internal combustion engine automobiles has important significance for reducing environmental pollution and realizing carbon neutralization early.
The reciprocating internal combustion engine automobile has been developed for hundreds of years since birth, and because the special crank connecting rod mechanism skillfully converts the rotation inertia force into the reciprocating inertia force and outputs work, sufficient power is provided for the automobile. In the current international large environment, the reduction of the oil consumption and the emission of the reciprocating internal combustion engine is still the primary problem for promoting the sustainable development of internal combustion engine automobiles. The traditional fossil fuel is difficult to realize low-carbon emission or even zero-carbon emission due to the limitations of the self composition and chemical structure. Compared with the traditional fossil fuel, the gaseous clean fuel such as hydrogen, natural gas and the like can effectively reduce the tail gas pollution. However, unlike liquid fuels, how to inject gaseous fuel directly into the cylinder and ensure stable operation of the engine is a problem that needs to be solved.
Based on the above related problems faced by the reciprocating internal combustion engine, the invention designs a direct injection gas nozzle in an electric control cylinder of the diesel engine and provides a control method for the whole operation of the direct injection gas nozzle in the electric control cylinder of the diesel engine based on the design basis of the diesel engine nozzle. The piston type friction pair is adopted to realize direct injection in the gas cylinder of the diesel engine nozzle, and the problems of lubrication and cooling of the gas nozzle are solved through reasonable oil inlet and return and gas pipeline design; meanwhile, the invention realizes the stable operation of the gas nozzle of the diesel engine and the whole engine through the control of the electric control unit, effectively reduces the environmental pollution caused by the reciprocating internal combustion engine, and provides possibility for the realization of a direct injection engine in a gas fuel cylinder.
Disclosure of Invention
A direct injection gas nozzle in an electric control cylinder of a diesel engine mainly comprises a lock nut 2, an oil injector body 3, an oil return port 4, an oil return channel 5, a gas spray head 6, a piston type cylinder 7, a piston type sealing ring 8, a tappet 9, a plunger spring 10, a plunger 11, an oil inlet channel 12, an oil inlet 13, an adjusting gasket 14, an intermediate disc 15, an oil return throttling port 16, a ball valve 17, a gas pipeline 18 and a gas inlet 19;
the diesel engine associated with the operation of the gas nozzle 1 mainly comprises: the gas inlet pipeline P1 is provided with a gas bottle 20, a pressure reducing valve 21, a gas flow sensor 22 and a flame retardant valve 23 in sequence; an air intake pipe P2 on which an air cleaner 24, a throttle valve 25, an intake flow sensor 26, and an intake pressure sensor 27 are provided in this order; the diesel oil supply pipeline P3 is sequentially provided with a diesel oil tank 32, a diesel oil filter 31, an oil delivery pump 30 and a high-pressure common rail 29; diesel oil returns to a diesel oil tank 32 through an oil return pipeline P4, and an oxygen concentration sensor 33, an ignition plug 28, a rotating speed sensor 34, a crankshaft position sensor 35 and an electronic control unit ECU36 are installed on an exhaust pipeline P5;
the electronic control unit ECU36 receives a gas flow signal b, an intake flow signal c, a crankshaft position signal d, an intake pressure signal e, an exhaust oxygen concentration signal h, a rotating speed signal i and a high-pressure common rail pressure signal j, and sends out a throttle opening signal a, a gas injection signal f and a spark plug ignition signal g.
The direct injection gas nozzle in the electric control cylinder of the diesel engine comprises the following operation and control processes:
the external main body of the gas nozzle consists of three parts, namely a locking nut 2, an oil injector body 3 and a gas nozzle 6, wherein the oil injector body 3 is provided with an oil inlet 13, an oil return port 4 and a gas inlet 19, the oil return port 4 is communicated with an oil return channel 5, the oil inlet 13 is communicated with an oil inlet channel 12, and the gas inlet 19 is communicated with a gas pipeline 18; meanwhile, the oil inlet 13 and the oil return port 4 are simultaneously connected with an external diesel oil supply pipeline, and the gas inlet 19 is connected with a gas bottle through a gas supply pipeline; an oil inlet channel 12, an oil return channel 5 and a gas pipeline 18 are correspondingly arranged in the oil injector body 3, an electromagnetic valve control ball valve 17 in the gas nozzle is lifted, the upper part of a middle disc 15 and the oil return channel form an oil return cavity, the lower part of the middle disc 15 is connected with a plunger 11, a plunger spring 10 at the bottom of the plunger 11 is contacted with a tappet 9, and a groove on the tappet 9 and the bottom end of the oil inlet channel 12 form an oil inlet cavity; the lower end of the tappet is provided with a piston type friction pair, the piston type friction pair consists of a piston type cylinder 7 and three piston type sealing rings 8, the piston type sealing rings can effectively separate gas and diesel oil in the operation process and play roles of sealing, lubricating and scraping oil, the diameter of the piston type cylinder 7 is larger than that of a gas spray hole at the head of the gas spray head 6, and the piston type friction pair can effectively prevent gas fuel from leaking in the gas spray stopping process;
the upper sealing ring is used for sealing diesel oil, the lower sealing ring is used for sealing gas fuel, the middle sealing ring plays a secondary sealing role to block the contact of the diesel oil and the gas, and the reciprocating motion of the piston type sealing rings can play a role in oil scraping and lubricating to prevent the piston type friction pair from being excessively worn;
the gas nozzle covers all gas types, such as hydrogen, natural gas, ammonia and the like.
According to the design of the direct injection gas nozzle in the electric control cylinder of the diesel engine, the whole control process of the direct injection gas nozzle is as follows:
during the operation of the engine, fresh air enters the cylinder from an air inlet pipeline P2 sequentially through an air filter 24, a throttle valve 25, an inlet flow sensor 26 and an inlet pressure sensor 27, an electronic control unit ECU36 judges the operation load of the engine through an inlet flow signal c and an inlet pressure signal e, determines the operation speed of the engine through receiving a speed signal i output by a speed sensor 34, thereby obtaining the specific operation condition of the engine, determining the injection pulse width of gas fuel, and simultaneously, the electronic control unit ECU36 determines the injection timing of the gas fuel through a crankshaft position signal d output by a crankshaft position sensor 35, the gas fuel is conveyed to a gas inlet 19 of a gas nozzle 1 through a gas bottle 20, a pressure reducing valve 21, a gas flow sensor 22 and a flame retardant valve 23, high-pressure diesel is conveyed to an oil inlet 13 of the gas nozzle 1 through a diesel oil tank 32, a diesel oil filter 31, an oil conveying pump 30 and a high-pressure common rail 29, the electronic control unit ECU36 sends a gas injection signal f to control the gas fuel injection timing, and the power-on duration of the electromagnetic valve corresponds to the gas fuel injection pulse width;
controlling gas injection: the electric control unit ECU36 controls the electromagnetic valve to be electrified, the ball valve 17 is jacked open by high-pressure diesel oil in the gas nozzle 1, the diesel oil flows into an oil return cavity through an oil return orifice 16, the diesel oil in the oil return cavity flows out of the oil sprayer body through an oil return passage 5 and an oil return opening 4, at the moment, a hydraulic pressure difference is formed between an oil inlet cavity and the oil return cavity, the diesel oil flows into the high-pressure oil inlet cavity through an oil inlet 13 and an oil inlet passage 12, the tappet 9 and the plunger 11 are jacked upwards, the tappet 9 is separated from the piston type friction pair, gas fuel is conveyed to the lower part of the piston type friction pair through a gas inlet 19 and a gas pipeline 18, the piston type friction pair is jacked upwards by means of gas supply pressure, and the gas is sprayed into an engine combustion chamber through a gas spray hole at the head part of the gas spray nozzle 6, so that the gas fuel is sprayed; and (3) gas injection stopping control: the electric control unit controls the electromagnetic valve to stop electrifying, the ball valve 17 is seated to cause the oil return throttling hole 16 to be closed, the pressure of the upper end of the plunger 11 is higher than that of the lower end, the tappet 9 and the piston type friction pair are pushed to move downwards, the lower end face of the piston type friction pair covers a gas spraying hole, and fuel injection is stopped;
after the gas fuel injection is finished, diesel oil flows back to the diesel oil tank 32 through an oil return pipeline P4, then the electronic control unit ECU36 sends an ignition signal g of a spark plug 28 to ignite the mixed gas in the cylinder, the combusted tail gas is exhausted into the atmosphere through an exhaust pipeline P5, and the electronic control unit ECU36 adjusts the air inflow of the next circulating air and fuel gas by receiving an oxygen concentration signal h output by an oxygen concentration sensor 33 on the exhaust pipeline, so that the complete machine control of the direct injection fuel gas nozzle in the electronic control cylinder of the diesel engine is realized.
The beneficial effects of the invention are mainly as follows: according to the direct-injection gas nozzle, direct injection in the gas cylinder of the diesel engine nozzle is realized by adopting the piston type friction pair structure, the lubricating and cooling problems of the gas nozzle are solved by reasonable oil inlet and return and gas pipeline design, and the reliability and durability of the gas nozzle are ensured; meanwhile, the invention provides a method for controlling the operation of the whole diesel engine with the direct injection gas nozzle in the electric control cylinder, the stable operation of the diesel engine gas nozzle and the whole diesel engine is realized through the specific control of the electric control unit, and the possibility is provided for the realization of the direct injection engine in the gas fuel cylinder.
Drawings
FIG. 1 is a schematic view of a gas burner; FIG. 2 is a drawing of parts of the piston type friction pair; FIG. 3 is a view of a gas burner head in detail; FIG. 4 is a schematic diagram of the overall control
In the figure: 1. a gas nozzle, 2, a lock nut, 3, an oil injector body, 4, an oil return port, 5, an oil return channel, 6, a gas spray head, 7, a piston type column body, 8, a piston type sealing ring, 9, a tappet, 10, a plunger spring, 11, a plunger, 12, an oil inlet channel, 13, an oil inlet, 14, an adjusting gasket, 15, a middle disc, 16, an oil return throttling port, 17, a ball valve, 18, a gas pipeline, 19, the device comprises a gas inlet, 20, a gas bottle, 21, a pressure reducing valve, 22, a gas flow sensor, 23, a flame-retardant valve, 24, an air filter, 25, a throttle valve, 26, an intake flow sensor, 27, an intake pressure sensor, 28, a spark plug, 29, a high-pressure common rail, 30, an oil delivery pump, 31, a diesel filter, 32, a diesel oil tank, 33, an oxygen concentration sensor, 34, a rotating speed sensor, 35, a crankshaft position sensor, 36 and an electronic control unit ECU;
a. and sending a throttle opening signal, b, a gas flow signal, c, an air inlet flow signal, d, a crankshaft position signal, e, an air inlet pressure signal, f, a gas injection signal, g, a spark plug ignition signal, h, an exhaust oxygen concentration signal, i, a rotating speed signal, j and a high-pressure common rail pressure signal.
Detailed Description
The invention is further described with reference to the following figures and detailed description:
the external main body of the gas nozzle consists of three parts, namely a locking nut 2, an oil injector body 3 and a gas nozzle 6, wherein the oil injector body 3 is provided with an oil inlet 13, an oil return port 4 and a gas inlet 19, the oil return port 4 is communicated with an oil return channel 5, the oil inlet 13 is communicated with an oil inlet channel 12, and the gas inlet 19 is communicated with a gas pipeline 18; meanwhile, the oil inlet 13 and the oil return port 4 are simultaneously connected with an external diesel oil supply pipeline, and the gas inlet 19 is connected with a gas bottle through a gas supply pipeline; an oil inlet channel 12, an oil return channel 5 and a gas pipeline 18 are correspondingly arranged in the oil injector body 3, an electromagnetic valve control ball valve 17 in the gas nozzle is lifted, the upper part of a middle disc 15 and the oil return channel form an oil return cavity, the lower part of the middle disc 15 is connected with a plunger 11, a plunger spring 10 at the bottom of the plunger 11 is contacted with a tappet 9, and a groove on the tappet 9 and the bottom end of the oil inlet channel 12 form an oil inlet cavity; the lower end of the tappet is provided with a piston type friction pair, the piston type friction pair consists of a piston type cylinder 7 and three piston type sealing rings 8, the piston type sealing rings can effectively separate gas and diesel oil in the operation process and play roles of sealing, lubricating and scraping oil, the diameter of the piston type cylinder 7 is larger than that of a gas spray hole at the head of the gas spray head 6, and the piston type friction pair can effectively prevent gas fuel from leaking in the gas spray stopping process;
the upper sealing ring is used for sealing diesel oil, the lower sealing ring is used for sealing gas fuel, the middle sealing ring plays a secondary sealing role to block the contact of the diesel oil and the gas, and the reciprocating motion of the piston type sealing rings can play a role in oil scraping and lubricating to prevent the piston type friction pair from being excessively worn;
the gas nozzle covers all gas types, such as hydrogen, natural gas, ammonia and the like.
According to the design of the direct injection gas nozzle in the electric control cylinder of the diesel engine, the whole control process of the direct injection gas nozzle is as follows:
during the operation of the engine, fresh air enters the cylinder from an air inlet pipeline P2 sequentially through an air filter 24, a throttle valve 25, an inlet flow sensor 26 and an inlet pressure sensor 27, an electronic control unit ECU36 judges the operation load of the engine through an inlet flow signal c and an inlet pressure signal e, determines the operation speed of the engine through receiving a speed signal i output by a speed sensor 34, thereby obtaining the specific operation condition of the engine, determining the injection pulse width of gas fuel, and simultaneously, the electronic control unit ECU36 determines the injection timing of the gas fuel through a crankshaft position signal d output by a crankshaft position sensor 35, the gas fuel is conveyed to a gas inlet 19 of a gas nozzle 1 through a gas bottle 20, a pressure reducing valve 21, a gas flow sensor 22 and a flame retardant valve 23, high-pressure diesel is conveyed to an oil inlet 13 of the gas nozzle 1 through a diesel oil tank 32, a diesel oil filter 31, an oil conveying pump 30 and a high-pressure common rail 29, the electronic control unit ECU36 sends a gas injection signal f to control the gas fuel injection timing, and the power-on duration of the electromagnetic valve corresponds to the gas fuel injection pulse width;
controlling gas injection: the electric control unit ECU36 controls the electromagnetic valve to be electrified, the ball valve 17 is jacked open by high-pressure diesel oil in the gas nozzle 1, the diesel oil flows into an oil return cavity through an oil return orifice 16, the diesel oil in the oil return cavity flows out of the oil sprayer body through an oil return passage 5 and an oil return opening 4, at the moment, a hydraulic pressure difference is formed between an oil inlet cavity and the oil return cavity, the diesel oil flows into the high-pressure oil inlet cavity through an oil inlet 13 and an oil inlet passage 12, the tappet 9 and the plunger 11 are jacked upwards, the tappet 9 is separated from the piston type friction pair, gas fuel is conveyed to the lower part of the piston type friction pair through a gas inlet 19 and a gas pipeline 18, the piston type friction pair is jacked upwards by means of gas supply pressure, and the gas is sprayed into an engine combustion chamber through a gas spray hole at the head part of the gas spray nozzle 6, so that the gas fuel is sprayed; and (3) gas injection stopping control: the electric control unit controls the electromagnetic valve to stop electrifying, the ball valve 17 is seated to cause the oil return throttling hole 16 to be closed, the pressure of the upper end of the plunger 11 is higher than that of the lower end, the tappet 9 and the piston type friction pair are pushed to move downwards, the lower end face of the piston type friction pair covers a gas spraying hole, and fuel injection is stopped;
after the gas fuel injection is finished, diesel oil flows back to the diesel oil tank 32 through an oil return pipeline P4, then the electronic control unit ECU36 sends an ignition signal g of a spark plug 28 to ignite the mixed gas in the cylinder, the combusted tail gas is exhausted into the atmosphere through an exhaust pipeline P5, and the electronic control unit ECU36 adjusts the air inflow of the next circulating air and fuel gas by receiving an oxygen concentration signal h output by an oxygen concentration sensor 33 on the exhaust pipeline, so that the complete machine control of the direct injection fuel gas nozzle in the electronic control cylinder of the diesel engine is realized.
Claims (3)
1. The utility model provides a direct injection gas nozzle in diesel engine automatically controlled cylinder which characterized in that, gas nozzle (1) includes: the device comprises a lock nut (2), an oil injector body (3), an oil return port (4), an oil return channel (5), a gas spray head (6), a piston type cylinder (7), a piston type sealing ring (8), a tappet (9), a plunger spring (10), a plunger (11), an oil inlet channel (12), an oil inlet (13), an adjusting gasket (14), a middle disc (15), an oil return throttling port (16), a ball valve (17), a gas pipeline (18) and a gas inlet (19); the diesel engine associated with the operation of the gas nozzle (1) essentially comprises: the fuel gas inlet pipeline P1 is sequentially provided with a fuel gas bottle (20), a pressure reducing valve (21), a fuel gas flow sensor (22) and a flame retardant valve (23); the air inlet pipeline P2 is sequentially provided with an air filter (24), a throttle valve (25), an inlet flow sensor (26) and an inlet pressure sensor (27); the diesel supply pipeline P3 is sequentially provided with a diesel oil tank (32), a diesel oil filter (31), an oil delivery pump (30) and a high-pressure common rail (29); diesel oil returns to a diesel oil tank (32) through an oil return pipeline P4, and an oxygen concentration sensor (33), a spark plug (28), a rotating speed sensor (34), a crankshaft position sensor (35) and an electronic control unit ECU (36) are mounted on an exhaust pipeline P5;
the electronic control unit ECU (36) is connected with a throttle valve (25) and controls the throttle valve opening through a throttle valve opening signal a;
the electronic control unit ECU (36) is connected with the gas flow sensor (22) and obtains a gas flow signal b;
the electronic control unit ECU (36) is connected with an intake flow sensor (26) and obtains an intake flow signal c;
the electronic control unit ECU (36) is connected with a crankshaft position sensor (35) and obtains a crankshaft position signal d;
the electronic control unit ECU (36) is connected with an air inlet pressure sensor (27) and obtains an air inlet pressure signal e;
the electronic control unit ECU (36) is connected with the gas nozzle (1) and controls the gas nozzle to be opened and closed through a gas injection signal f;
the electronic control unit ECU (36) is connected with the spark plug (28) and controls the ignition timing of the spark plug through a spark plug ignition signal g;
the electronic control unit ECU (36) is connected with an oxygen concentration sensor (33) and obtains an exhaust oxygen concentration signal h;
the electronic control unit ECU (36) is connected with a rotating speed sensor (34) and obtains a rotating speed signal i;
the electronic control unit ECU (36) is connected with the high-pressure common rail (29) and obtains a rail pressure signal j.
2. The diesel engine electric cylinder direct injection gas nozzle according to claim 1, characterized in that:
the external main body of the gas nozzle comprises three parts, namely a locking nut (2), an oil injector body (3) and a gas nozzle (6), wherein the oil injector body (3) is provided with an oil inlet (13), an oil return port (4) and a gas inlet (19), the oil return port (4) is communicated with an oil return channel (5), the oil inlet (13) is communicated with an oil inlet channel (12), and the gas inlet (19) is communicated with a gas pipeline (18); meanwhile, the oil inlet (13) and the oil return port (4) are connected with an external diesel oil supply pipeline, and the gas inlet (19) is connected with a gas bottle through a gas supply pipeline; an oil inlet channel (12), an oil return channel (5) and a gas pipeline (18) are correspondingly arranged in the oil injector body (3), an electromagnetic valve in a gas nozzle controls a ball valve (17) to rise and fall, the upper part of a middle disc (15) and the oil return channel form an oil return cavity, the lower part of the middle disc (15) is connected with a plunger (11), a plunger spring (10) at the bottom of the plunger (11) is contacted with a tappet (9), and a groove in the tappet (9) and the bottom end of the oil inlet channel (12) form an oil inlet cavity; the lower end of the tappet is provided with a piston type friction pair, the piston type friction pair is composed of a piston type cylinder (7) and three piston type sealing rings (8), the piston type sealing rings can effectively separate gas and diesel oil in the operation process and play roles of sealing, lubricating and scraping oil, the diameter of the piston type cylinder (7) is larger than that of a gas spray hole at the head of a gas spray head (6), and the piston type friction pair prevents gas fuel from leaking in the gas spray stopping process;
the piston friction pair's three piston sealing rings, upper portion sealing ring are used for sealing up diesel oil, and the lower part sealing ring is used for sealing up gaseous fuel, and middle sealing ring plays secondary seal effect, blocks diesel oil and gas contact to piston sealing ring's reciprocating motion plays the frizing lubrication action, prevents that piston friction pair wearing and tearing are excessive.
3. The direct injection gas nozzle in the electric control cylinder of the diesel engine according to claim 1, characterized in that the whole control process is as follows:
during the operation of the engine, fresh air enters a cylinder from an air inlet pipeline P2 through an air filter (24), a throttle valve (25), an inlet flow sensor (26) and an inlet pressure sensor (27) in sequence, an electronic control unit ECU (36) judges the operation load of the engine through an inlet flow signal c and an inlet pressure signal e, determines the operation rotating speed of the engine through receiving a rotating speed signal i output by a rotating speed sensor (34) so as to obtain the specific operation condition of the engine, thereby determining the injection pulse width of gas fuel, simultaneously, the electronic control unit ECU (36) determines the injection timing of the gas fuel through a crankshaft position signal d output by a crankshaft position sensor (35), the gas fuel is conveyed to a gas inlet (19) of a gas nozzle (1) through a gas bottle (20), a reducing valve (21), a gas flow sensor (22) and a flame retardant valve (23), high-pressure diesel oil is conveyed to an oil inlet (13) of a gas nozzle (1) through a diesel oil tank (32), a diesel oil filter (31), an oil delivery pump (30) and a high-pressure common rail (29), an electronic control unit ECU (36) sends a gas injection signal f to control the gas fuel injection timing, and the power-on duration of an electromagnetic valve corresponds to the gas fuel injection pulse width;
controlling gas injection: an electric control unit ECU (36) controls an electromagnetic valve to be electrified, a ball valve (17) is jacked open by high-pressure diesel oil in a gas nozzle (1), the diesel oil flows into an oil return cavity through an oil return orifice (16), the diesel oil in the oil return cavity flows out of an oil injector body through an oil return channel (5) and an oil return opening (4), at the moment, a hydraulic pressure difference is formed between an oil inlet cavity and the oil return cavity, the diesel oil flows into the high-pressure oil inlet cavity through an oil inlet (13) and an oil inlet channel (12), a tappet (9) and a plunger (11) are jacked upwards, the tappet (9) is separated from a piston type friction pair, gas fuel is conveyed to the lower part of the piston type friction pair through a gas inlet (19) and a gas pipeline (18), the piston type friction pair is jacked upwards by means of gas supply pressure, and the gas is sprayed into an engine combustion chamber through a gas spray hole at the head of the gas nozzle (6), so that the gas fuel is sprayed; and (3) gas injection stopping control: the electric control unit controls the electromagnetic valve to stop electrifying, the ball valve (17) is seated to cause the oil return throttling hole (16) to be closed, the pressure of the upper end of the plunger (11) is higher than that of the lower end, the tappet (9) and the piston type friction pair are pushed to move downwards, the lower end face of the piston type friction pair covers a gas spraying hole, and fuel injection is stopped;
after the gas fuel injection is finished, diesel oil flows back to a diesel oil tank (32) through an oil return pipeline P4, then an electronic control unit ECU (36) sends an ignition signal g of a spark plug (28) to ignite the mixed gas in the cylinder, the combusted tail gas is exhausted into the atmosphere through an exhaust pipeline P5, the electronic control unit ECU (36) receives an oxygen concentration signal h output by an oxygen concentration sensor (33) on the exhaust pipeline, adjusts the air inflow of the next circulating air and fuel gas, and realizes the complete machine control of a direct injection fuel gas nozzle in the electronic control cylinder of the diesel engine.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116085134A (en) * | 2023-02-24 | 2023-05-09 | 一汽解放汽车有限公司 | Engine fuel injection control method, device, equipment, medium and product |
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