Fuel injection system for fuel engine

Abstract

The fuel injection system comprises a mixing tank, a gas injection mechanism, an electronic control fuel injector and a fuel tank, a first gas inlet and a first gas outlet are formed in the mixing tank, an atomizing head is arranged in the mixing tank, an inlet of the atomizing head is communicated with a fuel delivery pipe, a partition plate is fixedly connected in the mixing tank, and a second gas inlet and a second gas outlet are formed in the fuel tank. A plurality of compression pipelines penetrate through the partition plate, the wide ends of the compression pipelines are close to the atomizing head, the narrow ends of the compression pipelines are close to the first exhaust port, the gas injection mechanism is communicated with the first gas inlet, an oil inlet and an oil spray nozzle are formed in the electronic control oil sprayer, the oil inlet is communicated with the first exhaust port, and an outlet of the oil tank is communicated with an oil pump. The oil conveying pipe penetrates through the mixing tank and communicates with an outlet of the oil pump. According to the fuel injection system for the fuel engine, the fuel injection nozzle integrates the air inlet function and the fuel injection function, the hole diameter of the injection hole is optimized and enlarged, and therefore the machining cost and the use cost are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to fuel injection technology field of fuel engine especially relates to a fuel injection system for fuel engine. BACKGROUND

[0002] In fuel engine, the nozzle is the core component of fuel atomization control, and its aperture precision directly affects the combustion efficiency and oil consumption performance; to realize fine fuel atomization, the existing nozzle generally adopts ultra-fine micro-hole structure (aperture is usually less than 0.1 millimeter);

[0003] However, such design has significant defects in practical application: first, micro-hole processing needs to rely on ultra-high precision manufacturing equipment, and the production process is complex and the yield is low, resulting in high manufacturing cost; second, ultra-fine micro-hole is easy to wear or block under long-term high-pressure fuel flushing and high-temperature working condition; third, to adapt to the ultra-fine micro-hole structure, high-purity fuel is needed to avoid particulate blockage, which puts high requirements on the filtration precision of the fuel filtration system, significantly increasing the replacement frequency and maintenance cost of the fuel filter;

[0004] The above problems lead to the bottleneck of high processing and use cost of the existing fuel injection system, which restricts the energy efficiency optimization of fuel engine. INVENTION CONTENTS

[0005] The utility model aims at providing a fuel injection system for fuel engine, which integrates air inlet and fuel injection functions in the nozzle to realize the optimization and enlargement of the nozzle aperture, thereby reducing the processing and use cost.

[0006] The utility model discloses a fuel injection system for fuel engine adopts the technical scheme:

[0007] Including the mixing jar, the gas injection mechanism, the electric control fuel injector and the oil tank, be equipped with first air inlet and first exhaust on the mixing jar, be equipped with the atomizing head in the mixing jar, the inlet of atomizing head is connected with the oil pipe, the fixed connection is equipped with the baffle in the mixing jar, the baffle hinders the air flow in the mixing jar, a plurality of compression pipelines are penetrated through on the baffle, the cross section of compression pipeline is the shape of closing, the wide end of compression pipeline is close to the atomizing head, the narrow end of compression pipeline is close to the first exhaust, the gas injection mechanism is connected with first air inlet, the electric control fuel injector is equipped with the oil inlet and the nozzle, the oil inlet is connected with the first exhaust, the outlet of oil tank is connected with the oil pump, the oil pipe is connected with the outlet of oil pump and is communicated.

[0008] As a preferred scheme, the electric control fuel injector is equipped with the oil outlet, the oil return pipe is communicated on the oil outlet, and the oil return pipe is communicated with the oil tank.

[0009] As a preferred solution, the mixing tank is provided with a first oxygen sensor, one end of which penetrates into the mixing tank near the narrow end of the compression pipeline.

[0010] As a preferred solution, the mixing tank is provided with a flow divider, the inlet of which is communicated with the first air inlet.

[0011] As a preferred solution, the flow divider is extended with a connecting rod, the distal end of which is rotatably connected with a flow guide head, one end of which faces the outlet of the flow divider, and a plurality of spaced flow guide grooves are formed in one end of the flow guide head.

[0012] As a preferred solution, the atomizing head is fixedly connected with a thimble, the tip of which faces the outlet of the atomizing head.

[0013] As a preferred solution, the gas injection mechanism and the mixing tank are provided with a gas storage tank, the gas storage tank is provided with a second air inlet and a second air outlet, the second air inlet is communicated with the gas injection mechanism, the second air outlet is communicated with the first air inlet, and the gas storage tank is communicated with a gas release valve.

[0014] As a preferred solution, the gas storage tank is provided with a second oxygen sensor, one end of which penetrates into the gas storage tank,

[0015] As a preferred solution, the gas injection mechanism comprises a booster fan and an intercooler, the outlet of the booster fan is communicated with the inlet of the intercooler, and the outlet of the intercooler is communicated with the second air inlet.

[0016] As a preferred solution, the gas injection mechanism further comprises a filter box, the filter box is provided with an air inlet and an air outlet, the filter box is provided with a filter element, the filter element separates the filter box into a first cavity and a second cavity, the air inlet and the air outlet are located in the first cavity and the second cavity respectively, and the air outlet is communicated with the inlet of the booster fan.

[0017] The utility model discloses a kind of beneficial effects of the fuel injection system for fuel engine:

[0018] The oil pump draws fuel from the fuel tank, injects the fuel into the atomizing head through the fuel delivery pipe, atomizes the fuel into oil mist through the atomizing head and sprays the oil mist in the mixing tank, simultaneously, the air injection mechanism injects air into the mixing tank through the first air inlet, so that the air mixes with the oil mist to form oil-gas mixture, the oil-gas mixture is pushed by the air injection mechanism to pass through the compression pipeline with the shape of a closed end, so as to compress the oil-gas mixture, the compressed oil-gas mixture enters the electronic control oil sprayer through the first air outlet and the oil inlet, and finally the oil-gas mixture is injected into the engine through the oil nozzle, so that the air and the fuel are supplied to the engine at the same time, the installation requirement of the turbocharger is eliminated, the air inlet and the oil injection functions are integrated through the oil nozzle, the aperture of the nozzle is enlarged, the precision machining difficulty and the production cost are reduced, and the overall system cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of the oil injection system for the fuel engine.

[0020] Figure 2 is a sectional view of the mixing tank of the oil injection system for the fuel engine.

[0021] Figure 3 is a sectional view of the flow divider of the oil injection system for the fuel engine.

[0022] Figure 4 is a sectional view of the atomizing head of the oil injection system for the fuel engine.

[0023] Figure 5 is a sectional view of the mixing tank of the oil injection system for the fuel engine.

[0024] Figure 6 is a sectional view of the compression pipeline of the oil injection system for the fuel engine.

[0025] Figure 7 is a sectional view of the air storage tank of the oil injection system for the fuel engine.

[0026] Figure 8 is a sectional view of the filter box of the oil injection system for the fuel engine. DETAILED DESCRIPTION

[0027] The utility model will be further described and explained in connection with specific embodiments and the drawings of the specification:

[0028] Please refer to Figures 1-3 .

[0029] The utility model discloses a kind of fuel injection systems for fuel engine, including mixing tank 1, electrically-controlled fuel injector 5, oil tank 4 and gas injection mechanism 7.

[0030] First air inlet 11 and first exhaust port 12 are opened on mixing tank 1, and first air inlet 11 and first exhaust port 12 are located at two ends of mixing tank 1 respectively, and gas injection mechanism 7 is communicated with first air inlet 11;Mixing tank 1 is provided with flow divider 2, and the inlet of flow divider 2 is communicated with first air inlet 11, so that the air entering mixing tank 1 through first air inlet 11 needs to flow through flow divider 2;

[0031] Further, the connecting rod 21 extends on the flow divider 2, and the distal end of the connecting rod 21 is rotatably connected with the flow guide head 22, one end of the flow guide head 22 faces the outlet of the flow divider 2.

[0032] Further, the distal end of the connecting rod 21 is embedded with a bearing 211, and the inner ring of the bearing 211 is sleeved on the outside of the other end of the flow guide head 22, and the flow guide head 22 is rotatably connected with the connecting rod 21 through the bearing 211; one end of the flow guide head 22 is preferably cylindrical, and the tip of the flow guide head 22 is close to the outlet of the flow divider 2; a plurality of flow guide grooves 221 are arranged on one end of the flow guide head 22, and the plurality of flow guide grooves 221 are uniformly arranged in a spiral shape around the tip of the flow guide head 22.

[0033] When the air is accelerated and injected out of the outlet of the flow divider 2 through the first air inlet 11, the high-speed jet flows along the spiral flow guide grooves 221 of the flow guide head 22 at a predetermined angle, and drives the flow guide head 22 to rotate at high speed on the connecting rod 21, at the same time, the air flows out of the flow guide head 22 from the end of the flow guide groove 221, and the rotating flow guide head 22 can make the air more evenly dispersed.

[0034] Please refer to Figure 1 、 Figure 2 and Figure 4 .

[0035] Mixing tank 1 is provided with an atomizing head 3, which is located between the flow divider 2 and the first exhaust port 12, and the inlet of the atomizing head 3 is communicated with an oil delivery pipe 31, and the atomizing head 3 is fixedly connected with a thimble 32, the tip of the thimble 32 faces the outlet of the atomizing head 3, and the outlet of the atomizing head 3 faces the first air inlet 11.

[0036] The outlet of the oil tank 4 is communicated with an oil pump 41, and an oil filter 42 is arranged between the oil tank 4 and the oil pump 41, the inlet of the oil filter 42 is communicated with the outlet of the oil tank 4, the outlet of the oil filter 42 is communicated with the inlet of the oil pump 41, and when the oil pump 41 extracts fuel from the oil tank 4, the fuel flows through the oil filter 42, and the oil filter 42 can filter impurities in the fuel; the oil delivery pipe 31 penetrates out of the mixing tank 1 and is communicated with the outlet of the oil pump 41.

[0037] The fuel is extracted from the oil tank 4 by the oil pump 41 and injected into the atomizing head 3, the atomizing head 3 sprays the high-pressure fuel at a high speed, the fuel collides to form atomized particles when contacting the needle 32, thereby converting the fuel into oil mist and spraying the oil mist in the mixing tank 1;

[0038] The air injection mechanism 7 injects air into the mixing tank 1 through the first air inlet 11 and the flow divider 2, so that the air mixes with the oil mist to form oil-gas mixture; the air generated by the air injection mechanism 7 is 1 MPa, and the flow divider 2 reduces the pressure of the air to 0.7 MPa when the air flows through the flow divider 2, so that the air generated by the air injection mechanism 7 is low-pressure air, and the high-pressure oil mist generated by the atomizing head 3 is 3 MPa, so that the high-pressure oil mist forms a pressure difference in the mixing tank 1, and the pressure difference is used to mix the air and the oil mist sufficiently, so that the oil-gas mixture is more uniform.

[0039] Please refer to Figure 1 、 Figure 2 、 Figure 5 and Figure 6 .

[0040] The mixing tank 1 is fixedly connected with a partition plate 13, and the partition plate 13 is preferably three in this embodiment, which can better support the compressed pipeline 131 arranged in the mixing tank 1; the outer side of the partition plate 13 is fixedly connected with the inner wall of the mixing tank 1, a plurality of compressed pipelines 131 penetrate the partition plate 13, the partition plate 13 hinders the air flow in the mixing tank 1, and the air entering the mixing tank 1 through the first air inlet 11 can only flow to the first air outlet 12 through the compressed pipeline 131;

[0041] Further, the cross section of the compressed pipeline 131 is in a shape of a narrowing opening, the wide end of the compressed pipeline 131 is close to the atomizing head 3, and the narrow end of the compressed pipeline 131 is close to the first air outlet 12;

[0042] The electric control fuel injector 5 is provided with an oil inlet, a fuel injection nozzle and an oil outlet, the oil inlet is communicated with the first air outlet 12, the fuel injection nozzle is communicated with the engine, and the oil outlet is communicated with a return oil pipe 51, and the return oil pipe 51 is communicated with the oil tank 4;

[0043] The oil-gas mixture is pushed by the air injection mechanism 7 to pass through the compressed pipeline 131 in the shape of a narrowing opening, so as to compress the oil-gas mixture, and the compressed oil-gas mixture enters the electric control fuel injector 5 through the first air outlet 12 and the oil inlet;

[0044] The electrically controlled fuel injector 5 is started, the communication between the oil inlet and the oil nozzle is opened, the oil gas mixture is injected into the engine through the oil nozzle, the air and the fuel are supplied to the engine at the same time, the installation of the turbocharger is not needed, and since the oil mist and the air need to pass through the oil nozzle at the same time, the aperture of the oil nozzle needs to be increased, the difficulty of precision machining is reduced, and the production cost is reduced in turn; the communication between the oil inlet and the oil nozzle is continuously opened and closed, the oil gas mixture is repeatedly injected into the engine, and the continuous operation of the engine is maintained.

[0045] The electrically controlled fuel injector 5 is closed, the communication between the oil inlet and the oil nozzle is closed, the oil outlet is temporarily opened, the oil gas mixture is returned to the oil tank 4 through the oil return pipe 51, and then the oil outlet is closed.

[0046] Please refer to Figure 1 , Figure 2 , Figure 5 and Figure 7 .

[0047] The air injection mechanism 7 and the mixing tank 1 are provided with a gas storage tank 6, the second air inlet 61 and the second air outlet 62 are formed in the gas storage tank 6, the second air inlet 61 is in communication with the air injection mechanism 7, the second air outlet 62 is in communication with the first air inlet 11, and the gas storage tank 6 is communicated with the air release valve 63.

[0048] The air injection mechanism 7 injects air into the mixing tank 1 through the gas storage tank 6, when the air pressure in the gas storage tank 6 exceeds the preset pressure of the air release valve 63, the air release valve 63 discharges high-pressure air, reduces the air pressure in the gas storage tank 6, and protects the normal operation of the system.

[0049] The first oxygen sensor 14 is installed on the mixing tank 1, one end of the first oxygen sensor 14 penetrates into the mixing tank 1 and is close to the narrow end of the compression pipeline 131; the second oxygen sensor 64 is installed on the gas storage tank 6, and one end of the second oxygen sensor 64 penetrates into the gas storage tank 6.

[0050] Please refer to Figure 1 , Figure 7 and Figure 8 .

[0051] The air injection mechanism 7 comprises a filter box 71, a booster fan 72 and an intercooler 73; the filter box 71 is provided with an air inlet 712 and an air outlet 714, the filter box 71 is provided with a filter element 715, the filter element 715 divides the filter box 71 into a first cavity 711 and a second cavity 713, the air inlet 712 and the air outlet 714 are located in the first cavity 711 and the second cavity 713 respectively, and the air outlet 714 is in communication with the inlet of the booster fan 72; the air entering the first cavity 711 from the air inlet 712 needs to pass through the filter element 715 to enter the second cavity 713, the filter element 715 is used for filtering the air to reduce impurities in the air, and the filtered air is discharged from the air outlet 714 through the second cavity 713;

[0052] The outlet of the supercharging fan 72 is communicated with the inlet of the intercooler 73, and the outlet of the intercooler 73 is communicated with the second air inlet 61.

[0053] The supercharging fan 72 draws external air through the filter box 71 for filtration, the filtered air is introduced into the supercharging fan 72 through the air outlet 714 for pressurization, the pressurized air is injected into the intercooler 73, the intercooler 73 exchanges heat with the air to reduce the temperature of the air, and the air injection mechanism 7 injects the filtered, pressurized and cooled air into the mixing tank 1 through the air tank 6.

[0054] Please refer to Figures 1-8 .

[0055] During operation, the supercharging fan 72 is started to run, so that the air injection mechanism 7 injects the filtered, pressurized and cooled air into the mixing tank 1 through the air tank 6; at the same time, the oil pump 41 is started to run, and the oil pump 41 draws fuel from the oil tank 4 and injects the fuel into the atomizing head 3, the atomizing head 3 converts the fuel into oil mist and sprays the oil mist in the mixing tank 1, so that the oil mist and the air are mixed to form oil-gas mixture; under the pushing of the air injection mechanism 7, the oil-gas mixture passes through the compression pipeline 131 with a closed shape, so that the oil-gas mixture is compressed, the compressed oil-gas mixture enters the electronic control fuel injector 5 through the first air outlet 12 and the oil inlet, and finally the oil-gas mixture is injected into the engine through the oil nozzle, so that the air and the fuel are supplied to the engine at the same time.

[0056] The first oxygen sensor 14 and the second oxygen sensor 64 monitor the air data in the mixing tank 1 and the air tank 6 respectively, so that the mixing ratio of the air and the fuel in the current oil-gas mixture can be obtained, and the running power of the supercharging fan 72 and the oil pump 41 is controlled, so that the air and the fuel in the oil-gas mixture are in the best mixing ratio.

[0057] The utility model provides a kind of fuel injection system for fuel engine, oil pump draws fuel from oil tank, and fuel is injected into atomizing head by oil pipe, and fuel is atomized into oil mist by atomizing head and sprayed in mixing tank;At the same time, air injection mechanism injects air into mixing tank through first air inlet, so that air and oil mist are mixed to form oil-gas mixture;Under the pushing of air injection mechanism, oil-gas mixture passes through compression pipeline with closed shape, so that oil-gas mixture is compressed;The compressed oil-gas mixture enters electronic control fuel injector through first air outlet and oil inlet, and finally oil-gas mixture is injected into engine through oil nozzle, so that air and fuel are supplied to engine at the same time, eliminate turbocharger installation demand, and, by the integration of oil nozzle into air intake and oil injection function and enlarge orifice aperture, reduce precision machining difficulty and production cost, to reduce the overall system cost of equipment.

[0058] It should be explained finally that the above embodiment is only used to illustrate the technical scheme of the utility model, and is not the limit of the protection scope of the utility model, although the utility model is explained in detail with reference to the preferred embodiment, the ordinary skilled in the art should understand that the technical scheme of the utility model can be modified or replaced equivalently, and does not deviate from the essence and scope of the technical scheme of the utility model.

Claims

1. A fuel injection system for a fuel engine, characterized in that, Comprising The mixing tank is provided with a first air inlet and a first air outlet, and an atomizing head is arranged in the mixing tank, and an oil inlet of the atomizing head is communicated with an oil delivery pipe; A partition is fixedly connected in the mixing tank, the partition hinders the air flow in the mixing tank, a plurality of compression pipelines are arranged through the partition, the cross section of the compression pipeline is in the shape of a narrowing, the wide end of the compression pipeline is close to the atomizing head, and the narrow end of the compression pipeline is close to the first air outlet; An air injection mechanism is communicated with the first air inlet; An electrically-controlled oil injector is provided with an oil inlet and an oil injection nozzle, and the oil inlet is communicated with the first air outlet; An oil tank is provided with an oil pump, and the oil delivery pipe is communicated with the outlet of the oil pump.

2. A fuel injection system for a fuel injected engine as claimed in claim 1, wherein, An oil outlet is arranged on the electrically-controlled oil injector, and a return oil pipe is communicated with the oil outlet and communicated with the oil tank.

3. A fuel injection system for a fuel injected engine as claimed in claim 2, wherein A first oxygen sensor is arranged on the mixing tank, and one end of the first oxygen sensor penetrates into the mixing tank and is close to the narrow end of the compression pipeline.

4. A fuel injection system for a fuel injected engine as claimed in claim 3, wherein A flow divider is arranged in the mixing tank, and an inlet of the flow divider is communicated with the first air inlet.

5. A fuel injection system for a fuel engine as described in claim 4, characterized in that, A connecting rod is arranged on the flow divider, and a flow guide head is rotatably connected to the end of the connecting rod, one end of the flow guide head faces the outlet of the flow divider, and a plurality of flow guide grooves are arranged on one end of the flow guide head.

6. A fuel injection system for a fuel injected engine as claimed in claim 5, wherein A thimble is fixedly connected to the atomizing head, and the tip of the thimble faces the outlet of the atomizing head.

7. A fuel injection system for a fuel injected engine as claimed in any one of claims 1 or 6 wherein, A gas storage tank is arranged between the air injection mechanism and the mixing tank, a second air inlet and a second air outlet are arranged on the gas storage tank, the second air inlet is communicated with the air injection mechanism, the second air outlet is communicated with the first air inlet, and a gas release valve is arranged on the gas storage tank.

8. A fuel injection system for a fuel injected engine as claimed in claim 7, wherein A second oxygen sensor is arranged on the gas storage tank, and one end of the second oxygen sensor penetrates into the gas storage tank.

9. A fuel injection system for a fuel injected engine as claimed in claim 8, wherein The air injection mechanism comprises a booster fan and an intercooler, the outlet of the booster fan is communicated with the inlet of the intercooler, and the outlet of the intercooler is communicated with the second air inlet.

10. A fuel injection system for a fuel injected engine as claimed in claim 9, wherein The air injection mechanism further comprises a filter box, an air inlet and an air outlet are arranged on the filter box, a filter element is arranged in the filter box, the filter element divides the filter box into a first cavity and a second cavity, the air inlet and the air outlet are arranged in the first cavity and the second cavity respectively, and the air outlet is communicated with the inlet of the booster fan.

Images