1897results about "Fuel injection apparatus" patented technology

A fuel injector is capable of injecting a plurality of different fuels in a single fuel injection event, the fuel injector including: a nozzle at an end of the fuel injector, the nozzle having a tip, openings in the tip of the nozzle through which fuel is configured to be injected, and a check valve member with a tip located within the nozzle, the check valve member being movable between an injection position in which fuel is injected via the openings and a closed position in which the openings are closed. The fuel injector further includes a primary fuel path within the fuel injector, a pilot fuel path within the fuel injector, and a mixing volume connecting the primary fuel path and the pilot fuel path when the check valve member is in the closed position.

The invention discloses a motorcycle emission fuel injector control method, system and equipment and a storage medium, and relates to the technical field of internal combustion engine control. According to the method, the real-time temperature of the fuel injector under the unheated condition is obtained, and the preheating temperature threshold value of the fuel injector is determined based on the difference value between the real-time temperature and the target temperature; acquiring a first temperature change rate of the fuel injector in each preset time period under the condition that the fuel injector is heated by a heat source of the motorcycle according to the preset heat supply amount; the preset heat supply amount is adjusted according to the first temperature change rates, and the target heat supply amount is obtained; a heat source of the motorcycle is controlled to heat a fuel injector according to the target heat supply amount until the real-time temperature reaches the preheating temperature threshold value, and emission parameters of a motorcycle engine are monitored; and the fuel injection amount of the fuel injector is determined based on the emission parameters and the emission parameter standard, and the fuel injector is controlled to inject according to the fuel injection amount. The motorcycle engine has the effect of improving the emission performance of the motorcycle engine.

The invention provides a double-curved-surface hole wall rotational flow umbrella oil nozzle for low-carbon fuel and a machining method, and relates to the technical field of gas turbine fuel injection. The nozzle comprises a needle valve, a needle valve seat, a spraying hole and a rotational flow groove; the needle valve and the needle valve seat form a sealing conical surface, the inner wall face of a spraying hole of the curved-surface rotational flow umbrella spraying nozzle is a double curved surface, the double curved surface and the sealing conical surface form a ruled surface, the rotational flow groove is formed in the inner wall face of the spraying hole, and the direction of the rotational flow groove is the generatrix of the ruled surface. The inner wall face of the spraying hole is designed to be the curved face, fuel is better guided to flow in the oil nozzle, the area of a low-pressure area is reduced due to sudden change of the direction in the fuel flowing process, and therefore cavitation is restrained from occurring and developing, and the phenomena that the spraying hole is blocked and mist spraying is unstable due to cavitation are improved; the rotational flow grooves in the curved surface can be achieved through the electric spark machining technology, the machining difficulty is reduced, meanwhile, the turbulent kinetic energy and the radial momentum of fuel can be effectively improved, spray distribution is more uniform, and the atomization quality is improved.

The common rail oil injector with the static leakage structure comprises an oil injector body, a control valve seat, a control valve matching part, a needle valve assembly and a needle valve body, and is characterized in that a middle hole pressure storage cavity is formed in the oil injector body and used for containing the control valve matching part and the needle valve assembly; the control valve matching part serves as the only static leakage matching part and is composed of a control valve sleeve and a control valve rod in clearance fit with the control valve sleeve, a static oil return channel comprising a first inclined oil return hole, a first vertical oil return hole and an annular groove is constructed in the control valve sleeve, a second oil return through hole in the high-pressure sealing face of the control valve seat is matched, and a specific fuel leakage backflow path is formed. Compared with a traditional 2000 bar common rail oil injector, static leakage matching parts are reduced, the fuel oil leakage amount is greatly reduced, oil consumption is effectively reduced, carbon emission is reduced, meanwhile, the reliability of the oil injector is improved, and the service life of the oil injector is prolonged. The middle hole pressure storage cavity can reduce oil injection pressure fluctuation, and the average effective injection pressure and the multi-time oil injection precision are improved. The oil injector body and the needle valve body are simplified in structure, and machining difficulty and manufacturing cost are reduced.

A fuel injector is provided. The fuel injector is operable to inject fuel at extremely high pressures which creates very small droplet sizes, allowing for efficient self-ignition of the fuel and allows for clean, efficient combustion due to the small droplet sizes. The fuel injector uses pressure from within a combustion chamber to actuate the spraying of fuel from the injector, thereby solving many problems experienced by typical fuel injectors and eliminating many problem-components of prior art fuel injectors.

The invention relates to the technical field of vehicle fuel injectors, in particular to a vehicle fuel injector assembly which comprises an adjusting mechanism, the adjusting mechanism is used for controlling fuel injection, an impurity filter element is installed in the adjusting mechanism, the impurity filter element is used for filtering impurities in the fuel, and the adjusting mechanism is used for adjusting the fuel injection. A mounting part is mounted on the adjusting mechanism in a communicating manner, an electric appliance connector is mounted on the mounting part, and the electric appliance connector is used for controlling the oil sprayer; a transmission mechanism and a cleaning mechanism are mounted on the mounting part, the transmission mechanism is driven by fuel oil penetrating through the impurity filter element, and the transmission mechanism is used for driving the cleaning mechanism to clean impurities left on the impurity filter element; a filter residue collecting device is mounted on the adjusting mechanism, the adjusting mechanism is communicated with the mounting part through the filter residue collecting device, and the filter residue collecting device is used for collecting filtered impurities in the fuel oil. The problems that an existing filtering mechanism is prone to being blocked and complex to maintain are solved.

The invention relates to an independent inner and outer needle valve type flexible fuel injector which comprises an injector shell, internally and externally nested needle valve matching parts, an electromagnetic control valve assembly and a double-row injection hole structure, and a diesel oil high-pressure oil way and a low-carbon fuel high-pressure oil way are arranged in the injector shell; the electromagnetic control valve assembly is arranged in the upper portion of the ejector shell, independently controls diesel oil injection and is of a hydraulic balance valve structure. Needle valve matching parts nested inside and outside are installed at the bottom of the ejector shell and connected with the electromagnetic control valve assembly through a spring guide sleeve, a limiting block and a middle rod. A double-row spray hole structure is arranged at the bottom of the internally and externally nested needle valve matching part; the inerting valve set is connected to the low-carbon fuel high-pressure oil way and used for purging and inerting during fuel switching. By means of the nesting needle valve, the diesel oil lubrication seal, the independent control valve and the inerting design, efficient and stable dual-fuel injection is achieved, the problem of mixing in the prior art is solved, the service life of the injector is prolonged, and the dual-fuel injector is suitable for ship engines with alternative fuel such as methanol / ammonia.

A valve system includes at least one spin chamber having an outlet drain configured to allow flow out of the spin chamber. A main spin surface of the at least one spin chamber is defined around the outlet drain. A directional jet system is in fluid communication with the at least one spin chamber. The directional jet system includes a plurality of members each is configured to move between a first position for directing a tangential flow around the drain of the at least one spin chamber and a second position for directing a radial flow toward the drain of the at least one spin chamber.

Embodiments of the present application disclose a fuel injection parameter adjustment method, device, equipment and storage medium. The fuel injection parameter adjustment method comprises: determining that a vehicle enters a series-parallel hybrid working condition; recording a set of initial fuel injection parameters of an engine; performing fuel injection parameter self-learning, obtaining a plurality of sets of test fuel injection parameters based on the set of initial fuel injection parameters; sequentially using the plurality of sets of test fuel injection parameters to run the engine, and calculating a plurality of test fuel consumptions of the vehicle; wherein each set of test fuel injection parameters corresponds to a test fuel consumption; the running time of each set of test fuel injection parameters is a first self-learning time; based on comparing the plurality of test fuel consumptions, determining an optimal self-learning result from the plurality of sets of test fuel injection parameters; and replacing the initial fuel injection parameters with the self-learning result.

The invention relates to an external cylinder cover air inlet channel methanol injection switching system, and relates to the field of ship engineering and power systems. The methanol spraying device comprises a cylinder cover, a front-end switching block arranged at one end of the top of the cylinder cover, a methanol spraying device penetrating through the front-end switching block, a middle-end switching block arranged at the top of the methanol spraying device and connected with the front-end switching block, a rear-end switching block arranged on the middle-end switching block, a methanol distribution block arranged on the rear-end switching block and a methanol double-wall pipe arranged on the methanol distribution block. The alcohol spraying device is obliquely arranged above the air inlet channel and follows the air inlet direction, so that the spraying resistance is reduced; the methanol double-wall pipe is connected to the two transverse sides of the methanol distribution block, and methanol is supplied to the methanol sprayer through the middle-end adapter block and the rear-end adapter block. The external connection type design is adopted, large-scale transformation of an existing engine structure is not needed, the transformation cost and the implementation difficulty are reduced, and the method is suitable for various types of ship engines.

The invention relates to an injector arrangement (1) for a gas turbine, in particular an aircraft engine, for introducing a gaseous fuel and a liquid fuel as well as air into a combustion chamber (CC), comprising an injector shaft (2) and an injector main body (3) aligned along an injector longitudinal axis (L), wherein the injector main body (3) comprises: - a first gas channel (12) arranged centrally on the injector longitudinal axis (L) with a downstream outlet opening (14) for introducing a gas flow, - at least one air channel (31, 36, 40) arranged radially around the outside of the first gas channel (12), as a second gas channel (30), and - a liquid fuel injection (24) arranged radially around the first gas channel (12) for introducing the liquid fuel into the combustion chamber (CC).An advantageous emission characteristic can be achieved by designing the first gas channel (12) exclusively for introducing the gaseous fuel into the combustion chamber (CC) (Fig. 1).

Disclosed are an apparatus for a simulation test of diesel engine fuel spray in an alpine environment and a test method, the apparatus comprising a fuel storage and pretreatment device, a fuel injection system, an optical visualization system, an environment chamber, and a spray pretreatment system. In alpine environmental conditions, the apparatus can achieve high-pressure injection of liquid, separate injected atomized mist into fine droplets and impinge same on a wall surface by means of a multi-droplet generation apparatus and a wall surface apparatus, and observe and record the whole process by means of an optical visualization path. According to the present invention, the problem of difficulty in distinguishing droplets due to the coalescence of spray into a sheet is avoided, the costs of a traditional spray and droplet test solution can be significantly reduced, and the problem of a high level of dependence on a control program in a constant volume vessel solution is solved. According to the present invention, simulation of spray test in an alpine environment is possible, and the test apparatus has a simple structure. Moreover, it is possible to conduct regular research on free spray, multi-droplet wall impingement, spray wall impingement, and development characteristics thereof under conditions such as different altitudes and different temperatures.

A fuel pre-heating component in a gas turbine engine includes a component housing extending around a central axis from a first end to a second end, wherein the component housing includes walls that define an inner chamber, a heating element positioned inside the inner chamber, and a plurality of internal fuel channels disposed within the component housing and configured to be heated by the heating element.

The invention provides a liquid ammonia in-cylinder direct injection engine combustion system and method with an active pre-combustion chamber, and relates to the technical field of internal combustion engines, the liquid ammonia in-cylinder direct injection engine combustion system comprises a cylinder cover and a cylinder sleeve arranged below the cylinder cover, the pre-combustion chamber is vertically arranged in the center of the cylinder cover, a liquid ammonia injector is arranged on one side of the pre-combustion chamber, and the active pre-combustion chamber is arranged in the cylinder sleeve. A hydrogen ejector and a spark plug are arranged on the pre-combustion chamber; and spraying holes are formed in the pre-combustion chamber and located in the bottom of the pre-combustion chamber, and the spraying holes of the pre-combustion chamber face one side of the liquid ammonia ejector. According to the liquid ammonia in-cylinder direct injection engine combustion system and method with the active pre-combustion chamber, the effect that diffusion combustion is promoted through premixed combustion of ammonia fuel is achieved, accurate control over the combustion initial point and the heat release rate is achieved, and the requirements for the low hydrogen energy ratio, high ignition efficiency and high heat efficiency of an ammonia fuel engine in the full working condition range are met.

Invention relates to a fuel ignitor (10) for gaseous fuel comprising a body assembly (12) having a longitudinal axis (A), and a first axial end and a second axial end. The ignitor body assembly (12) comprises a. a prechamber (20) arranged at the first axial end and having a tip, and more than two jet openings (22) arranged to the tip of prechamber (20) at the first axial end, b. a fuel inlet (26) arranged to open into the prechamber (20), c. first cavity (28) arranged to extend from the second axial end of the body assembly (12) to proximity to the prechamber (20), wherein a solenoid actuated gas admission valve unit (29) is arranged in the first cavity (28), d. second cavity arranged to extend from the second axial end of the body assembly (12) to the prechamber (20), wherein an ignition device (31) is arranged in the second cavity in cooperation with the prechamber (20) so as to initiate combustion of fuel in the prechamber (20), when in use, e. cooling channels (32) arranged at the first axial end of the ignitor body assembly (12) arranged in heat transfer connection with the prechamber (20). Invention relates also to a cylinder head - fuel ignitor combination, a gas operated internal combustion engine and method of converting an existing internal combustion piston engine.

This invention relates to a methanol fuel injector for an engine, comprising an injector body, a solenoid valve, a needle valve rod, a needle valve spring, and a needle valve. The solenoid valve is disposed on the top of the injector body. The solenoid valve includes a valve body, an electromagnet, and a solenoid valve spring. A control oil accumulator chamber is formed between the valve body and the needle valve spring. A control oil inlet is provided on one side of the injector body, communicating with the control oil accumulator chamber. A low-pressure chamber is formed between the valve body and the injector body. A control oil return port is provided on one side of the injector body, communicating with the low-pressure chamber. A methanol inlet passage is formed between the needle valve rod and the injector body. A methanol fuel accumulator chamber is formed between the needle valve and the injector body. A methanol inlet and return port is provided on one side of the injector body, communicating with the methanol inlet passage. This invention solves the problem of rapid wear of the control valve and effectively controls the upward leakage of methanol by introducing a piston structure.

A fuel injector (10) includes a mount (14), a stem (16), a nozzle (18), and a heat shield (12). The stem (16) extends from the mount (14). The nozzle (18) is at a distal end of the stem (16) opposite the mount (14) and configured to discharge an oxidant-fuel mixture along a nozzle axis (C). The heat shield (12) extends from the mount (14) towards the nozzle (18). The heat shield (12) includes a stem segment (12A) surrounding the stem (16) and at least a portion of the nozzle (18) and a compliant segment (12B) extending from the stem segment (12A) to the nozzle (18), a lip (26) extending from the nozzle (18), or a cap (28) surrounding the nozzle (18).

A gas turbine engine including a fuel injector having an outer valve body with an inner passage, a wall at least partially enclosing the inner passage, the wall having an inner surface, an outer surface, and one or more channels passing through the wall between the outer surface of the wall and the inner surface of the wall, and a retractable valve body positioned within the inner passage of the outer valve body. The retractable valve body has one or more slots in fluid communication with the fluid spin chamber. The retractable valve body is positioned within the inner passage to move along a reciprocating axis at one or more valve positions including an advanced valve position, a retracted valve position, an open valve position, and a closed valve position.

The invention relates to the technical field of methyl alcohol fuel injection system injectors, in particular to a high-pressure-difference methyl alcohol injector for a ship engine, which comprises a gland, an electromagnetic valve assembly, a shell, an ejector rod, a spring, a range limiting disc, a valve body, a valve core bushing, an orifice plate and a valve seat. According to the methanol injector, the fuel inlet is laterally arranged, and the overall flow direction of fuel is side-in and bottom-out, so that the leakage phenomenon possibly caused by insufficient coaxiality of external pipe joints in a conventional fuel jacking installation mode is avoided, and the sealing of an engine cannot be influenced even under severe working conditions such as continuous vibration; according to the methanol injector, methanol supply pressure (hydraulic pressure) is used for assisting in opening of the valve element of the methanol injector, compared with an injector with a conventional direct-drive electromagnetic valve opening valve element, the structure can achieve opening of the methanol injector only through smaller electromagnetic force and lower power consumption, and higher methanol injection pressure can be achieved after the spring and the supply pressure are accurately matched; and more efficient atomization can be realized.

The invention relates to the field of power and energy engineering, in particular to a methanol-diesel dual-fuel internal mixing type fuel injector capable of being independently controlled. In order to overcome the defects that in the prior art, a dual-fuel injection system is complex in structure, the size of an oil injector is large, a cylinder cover is difficult to install, the fuel premixing capacity is poor, and injection control is not flexible, the technical scheme is that the methanol-diesel oil dual-fuel internal mixing type oil injector capable of being independently controlled comprises an oil injector shell; the fuel injector shell is provided with a methanol fuel inlet, a diesel fuel inlet, a fuel injection hole as well as a methanol oil way and a diesel oil way which are respectively connected with the methanol fuel inlet and the diesel fuel inlet; a methanol control assembly, a diesel oil control assembly, a pressure control chamber, a ball valve, a needle valve and a premixing pressure cavity are arranged in the oil injector, injection of methanol and injection of diesel oil can be controlled respectively, and mixed injection of two kinds of fuel can be achieved in the premixing pressure cavity. The methanol-diesel oil dual-fuel efficient mixed injection system is suitable for modification work of an engine oil injection system needing to achieve methanol-diesel oil dual-fuel efficient mixed injection and precise control in the fields of ship power, heavy vehicles, engineering machinery and the like.

The invention belongs to the technical field of technical performance testing equipment of electronic control oil injectors in core high-value accessories of diesel generating sets for petroleum drilling production, and particularly relates to a dual-drive electronic control oil injector performance testing device and method and application. The device comprises a connecting base, a fuel supply and recovery mechanism connected to the lower portion of the connecting base, a fuel injector fixing support connected to the lower portion of the connecting base and arranged beside the fuel supply and recovery mechanism, a cam shaft box mechanism connected to the upper surface of the connecting base, and a lower push rod mechanism connected between the connecting base and the fuel injector fixing support. The direct current control mechanism and the manual driving mechanism are fixed on the upper surface of the connecting base and are connected with the cam shaft box mechanism. The method is complete in function, simple to operate, visual and accurate in detection result, high in goodness of fit, excellent in timeliness and low in cost. Compared with the prior art, the speed is increased by more than or equal to one time, and the effect that the detection result is visual and clear is achieved.

The invention relates to the technical field of engine starting, and provides a cold start auxiliary system of a methanol engine, a control method of the cold start auxiliary system and related equipment. The cold start auxiliary system of the methanol engine comprises an air inlet heater which is assembled on the inner wall of an air inlet pipeline of the methanol engine and used for heating air in the air inlet pipeline; the spark plug heater is assembled on the outer wall of a spark plug of the methanol engine and used for heating the spark plug; the nozzle heater is assembled on the outer wall of a nozzle of the methanol engine and used for heating methanol fuel flowing through the nozzle; the air inlet temperature sensor is assembled on the inner wall of an air inlet pipeline of the methanol engine and is used for detecting the temperature of air in the air inlet pipeline; the control unit is in communication connection with the air inlet heater, the spark plug heater, the nozzle heater and the air inlet temperature sensor and used for controlling the air inlet heater, the spark plug heater and the nozzle heater according to the temperature of cooling liquid of the methanol engine.

The invention provides a fuel injector, an injection system, an injection method and an engine. Wherein the fuel injector comprises a needle valve matching part, the needle valve matching part comprises a needle valve body and a needle valve, and the needle valve is arranged in a mounting space provided in the needle valve body; the pilot valve comprises an armature and an electromagnet, and the electromagnet can drive the armature to move; the middle block is arranged between the needle valve matching part and the pilot valve, the pilot valve is installed on one side of the middle block, and the needle valve matching part is installed on the other side of the middle block; wherein the middle block is provided with a first hole matched with the armature and a second hole matched with the end portion of the needle valve, and the end portion of the armature and the end portion of the needle valve are in fluid communication through a control cavity. And the oil nozzle is arranged at the other end part of the other end of the needle valve and corresponds to the needle valve body.

The invention provides an opposed piston two-stroke diesel engine vector air inlet-space injection combustion system which comprises an air cylinder sleeve, an air inlet piston, an exhaust piston and a plurality of oil injectors, and the air inlet piston, the exhaust piston and the inner wall of the air cylinder sleeve are matched to form a combustion chamber. A plurality of vector air inlets and exhaust ports are formed in the positions, close to the air inlet piston and the exhaust piston, of the air cylinder sleeve respectively, each vector air inlet is composed of a direct-flow air port and a vortex air port, and the direct-flow air ports and the vortex air ports are arranged at intervals in the circumferential direction; the number of the oil sprayers is two, and the two oil sprayers are arranged on the center face of the air cylinder sleeve in a staggered mode so that the oil sprayers can be arranged in a reverse vortex mode. The problems that an opposed piston two-stroke diesel engine is insufficient in combustion, low in scavenging efficiency and the like are solved, oil and gas in a cylinder can be rapidly and sufficiently mixed through the system, the combustion process is effectively accelerated, combustion in the cylinder is more sufficient, and the combustion efficiency is improved.

An injection device for injecting a combined water / gaseous fuel mixture into a combustion space of an engine. The injection device comprises: a first inlet for receiving a supply of water into a water chamber; a second inlet for receiving a supply of gaseous fuel into a flow passage; a mixing device comprising a valve assembly which is configured to control the flow of water between the water chamber and the flow passage so as to establish a combined gaseous fuel / water mixture within the flow passage; and an injection nozzle including a valve needle which is operable to control the delivery of the combined gaseous fuel / water mixture from the flow passage into the combustion space. The disclosure also extends to a fuel injection system.

The invention discloses a diesel engine methanol injection system with an airtight detection function, which is formed by communicating a methanol liquid inlet double-wall pipe, a methanol liquid return double-wall pipe, a methanol pressurizing unit and a high-pressure pipeline, the methanol liquid inlet double-wall pipe is communicated with a fresh water supply system through a liquid inlet stop valve, and the methanol liquid return double-wall pipe is provided with a liquid return stop valve; a liquid return chain pipe valve is communicated between the methanol liquid return double-wall pipe and the methanol pressurizing unit, and a communication valve is arranged between the methanol liquid inlet double-wall pipe and the methanol liquid return double-wall pipe; a communicating port of the high-pressure pipeline and the methanol pressurizing unit is plugged through a plugging tool which is detachably arranged on the methanol pressurizing unit, and a plurality of methanol pressure detection sensors are arranged on the methanol liquid inlet double-wall pipe and the methanol liquid return double-wall pipe respectively. According to the airtightness detection method for the marine methanol low-speed diesel engine, fresh water which has intersolubility with methanol is used as a tightness detection medium, complete tightness detection of a methanol spraying system of the marine methanol dual-fuel low-speed diesel engine is achieved, the detection efficiency is high, and the leakage point detection speed is high.

The utility model relates to the technical field of engines, and particularly discloses an intake manifold assembly which is arranged between an air damper and air inlet channels on an air cylinder cover in a communicated mode and comprises an upper shell and a lower shell which are in butt joint with each other, a main cavity is formed between the upper shell and the lower shell, and a flange connector is arranged at one end of the lower shell. One end of the flange joint communicates with the main chamber, and the other end of the flange joint communicates with the throttle valve; a plurality of manifold cavities are formed in the end, away from the flange connector, of the lower shell, communicate with the main cavity and communicate with the multiple air inlet channels correspondingly. An oil rail is arranged on the upper shell, a plurality of mounting pipes are arranged on the lower shell, one mounting pipe is communicated with one manifold cavity, oil sprayers are arranged in the mounting pipes, and the oil sprayers are communicated with the oil rail; one end of the oil sprayer far away from the oil rail extends out of the manifold cavity; the problems that under the same displacement, a naturally aspirated engine is usually low in power, low in overall engine efficiency and the like are solved.

The invention provides a glow plug hot surface ignition methanol machine adopting high-pressure rotational flow umbrella spraying, which relates to the technical field of methanol engines, and comprises a combustion chamber defined by a cylinder body, a piston and a cylinder cover, a methanol rotational flow umbrella spraying ejector and a glow plug, the piston is arranged in the cylinder body, and the cylinder cover is arranged at the top of the cylinder body; the piston is connected to the connecting rod; the methanol rotational flow umbrella spraying ejector is arranged in the cylinder cover and is communicated with the combustion chamber; the methanol rotational flow umbrella spraying ejector is used for spraying methanol into the methanol cylinder to form methanol umbrella-shaped spray; the glow plug is arranged in the cylinder cover and is communicated with the combustion chamber; and the glow plug is used for igniting the methanol umbrella-shaped spray sprayed into the cylinder body. According to the invention, the cylinder cover is punched and additionally provided with the glow plug, the methanol rotational flow umbrella spray ejector is arranged in the center of the cylinder cover, the methanol rotational flow umbrella spray ejector ejects methanol umbrella-shaped spray, and the methanol umbrella-shaped spray does not have a fuel rarefied area between methanol oil beams, so that efficient and clean diffusion combustion of the methanol machine can be realized.

The utility model relates to the field of oil pumps, in particular to a centralized high-pressure common rail system. The common rail system comprises a PVC valve, a right cross rail connecting pipe, a left cross rail connecting pipe, a right high-pressure common rail, a left high-pressure common rail, a high-pressure oil pipe A, a high-pressure oil pipe B, a high-pressure oil pipe C, a safety valve and a rail pressure sensor, one side of the PVC valve is communicated with the right high-pressure common rail through the right cross rail connecting pipe, and the other side of the PVC valve is communicated with the left high-pressure common rail through the left cross rail connecting pipe. And a rail pressure sensor is mounted at the end of the right high-pressure common rail. The left high-pressure common rail and the right high-pressure common rail are connected at the rear end of the diesel engine through the left high-pressure common rail and the right high-pressure common rail, so that oil pressure in oil cavities of the left high-pressure common rail and the right high-pressure common rail tends to be consistent; the high-pressure common rail is of a double-layer pipe structure, and the high-pressure oil pipe and the high-pressure common rail are connected and sealed through a ball head. The high-pressure common rail inner pipe is an integral steel pipe, and the high-pressure common rail outer pipe is a sectional steel pipe, so that the high-pressure common rail has better safety and leakproofness.

According to the high-pressure common-rail oil injector, through an innovative electromagnetic valve wire leading-out method, only fewest parts need to be reserved for an electromagnetic valve, a series of parts such as adapters and supports are omitted, the whole injection molding process is omitted, and therefore the purposes of simplifying the structure and reducing the cost are achieved.