CN1019841B - The fuel injection apparatus of injection carburetor - Google Patents
The fuel injection apparatus of injection carburetorInfo
- Publication number
- CN1019841B CN1019841B CN89103520A CN89103520A CN1019841B CN 1019841 B CN1019841 B CN 1019841B CN 89103520 A CN89103520 A CN 89103520A CN 89103520 A CN89103520 A CN 89103520A CN 1019841 B CN1019841 B CN 1019841B
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- Prior art keywords
- fuel
- chamber
- low
- pressure
- fuel injection
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Abstract
The fuel injection apparatus of injection carburetor comprises the low-speed fuel control device that is made of the common pressure chamber of regulator and fuel chamber, a main fuel control gear that is made of another common pressure chamber and another fuel chamber of regulator.Low-speed fuel control device and main oil firing control gear have a common fuel delivery passage, and the former fuel control unit is positioned at the downstream of the latter's fuel control unit.This fuel injection apparatus has wide control range, high precision, its cost is low and can keep initial performance for a long time.
Description
The present invention relates to a kind of fuel injection apparatus of injection carburetor, the negative pressure that it can be produced according to the inhaled air flow velocity, standard
Really control fuel injection rate.
An example as traditional fuel injection apparatus of this type Carburetor is that well-known, as to be used for aircraft rich lattice (Bendix-Stromberg) fuel injection system of BENDIx-Si Tom (is seen " spark-ignition engine: fuel injection system " CHARLESH.FISHER, CHARLES; HALL, 1966).Below the 26S Proteasome Structure and Function of this fuel injection system will be described simply.This fuel injection system comprises a fuel control unit, constitute by regulator air cavity and fuel chamber, wherein air cavity is divided into the common pressure chamber of introducing dynamic pressure and the low-pressure cavity of introducing aditus laryngis pressure by air diaphragms, the fuel chamber of regulator is divided into by fuel pump by the fuel oil barrier film and infeeds the fuel pressure chamber of fuel oil and the fuel injection chamber that communicates with the fuel pressure chamber by measuring jet, a link that is connected on air diaphragms and the fuel oil barrier film, and the poppet valve of an open and close fuel pressure chamber import is arranged.One is connected to the fuel injection chamber and is used for fuel nozzle to the suction pipe injected fuel that is positioned at the throttle valve downstream.After the engine start, in fuel control unit, determined by throttle valve inhaled air flow velocity, just produced pressure reduction between common pressure chamber in the air cavity of regulator and the low-pressure cavity corresponding to air velocity, air diaphragms then moves link to the low-pressure cavity direction, so that fully open poppet valve.On the other hand, the pressure reduction between fuel pressure chamber and the fuel injection chamber puts on the fuel oil barrier film, it link in the opposite direction displacement to close poppet valve.Act on the mutual balance of rightabout pressure difference at this, just determined the aperture of poppet valve, and then determined to import the fuel flow rate in fuel pressure chamber.Because fuel nozzle is with constant pressure injection fuel oil, the fuel pressure in measuring jet downstream is just determined by the predetermined value that is proportional to nozzle pressure.Correspondingly, produce a pressure difference between the upstream and downstream of measuring jet, its value equals to result from the atmosphere chamber of regulator air cavity and the pressure difference between the low-pressure cavity.Because the two is proportional to the square root of above-mentioned pressure difference air velocity and fuel flow rate, the fuel flow rate of therefore injecting suction pipe is proportional to the inhaled air flow velocity, and air fuel ratio remains unchanged.
Yet, the flow velocity that this fuel injection apparatus in fact only can suck in the scope inner control of 8 times of minimum flow velocity or 10 times and the flow velocity of injected fuel.For example, when exporting for maximum, be assumed to be about 30mmHg(millimeter of mercury by air stream in the negative pressure that aditus laryngis produces), the negative pressure that controlled minimum air flow speed produces is 0.3mmHg(4.1mmAq), this fuel injection apparatus can not be controlled the air velocity of the pressure that is lower than 0.3mmHg.On the other hand, common motor car engine must have the ability to control air velocity and fuel flow rate in 60 times of scopes of minimum flow velocity.Thereby above-mentioned fuel injection system can not be as the fuel injection apparatus of automobile.
In order to address this problem, UK Patent Application GB-A-1,021, a kind of fuel injection apparatus has been proposed in 509, it has one according to the low-speed fuel control device of the low relatively air that sucks with the low-speed jet fuel oil, one according to the main fuel control gear of the high relatively air velocity that sucks with the high velocity jet fuel oil, and main fuel measuring element that is used for measuring the fuel flow rate that penetrates from the main fuel control gear and one are arranged in the low speed fuel metering element that is used to measure the fuel flow rate that penetrates from low-speed fuel control device of main fuel measuring element downstream part.
But, still have deficiency aspect the fine adjustment of the mixture air fuel ratio of this device in control accuracy and whole driving scope.
The purpose of this invention is to provide a kind of fuel injection apparatus that can be applied to the above-mentioned type of the wide control range of having of automobile or motorcycle, the air fuel ratio that this device can keep high control accuracy and regulate the mixture that infeeds motor exactly.
Another object of the present invention provides a kind of low cost of manufacture and can keep the mechanical type fuel injection apparatus of its initial performance for a long time.
The objective of the invention is to reach like this, a kind of fuel injection apparatus of injection carburetor promptly is provided, comprise a low-speed fuel control device from the low relatively air velocity that sucks suction pipe to suction pipe that inject low relatively flow velocity fuel oil according to, a main fuel control gear from the high relatively air velocity of suction suction pipe to suction pipe that inject the fuel oil of relative high flow rate according to, each described low-speed fuel control device and described main fuel control gear comprise the air cavity of a pair of regulator and the fuel chamber of regulator, the fuel chamber of the regulator of described low-speed fuel control device and described main fuel control gear has a common fuel gallery, and be useful on the low speed fuel metering element and the main fuel measuring element of metering fuel oil ejaculation amount, the fuel chamber of the regulator of described low-speed fuel control device is arranged on the downstream part of air cavity of the regulator of described main fuel control gear, wherein, the fuel chamber of the regulator of described low-speed fuel control device has a low speed fuel oil bypass of walking around described low speed fuel metering element setting by bypass, the fuel chamber of described main fuel control gear regulator has one to walk around the main fuel bypass that described main fuel measuring element is provided with by bypass, and the fuel delivery rate control gear of a control mixture air fuel ratio is arranged in each low speed fuel oil bypass and main fuel bypass.
Fuel oil can be very accurately measured according to oil burning installation of the present invention, and mixing fully can be in whole driving scope, produced.This is because the fuel oil that its fuel delivery rate controlling device has improved the flexibility of the fuel injection rate of setting and can regulate injection more accurately.
When from the detailed description of most preferred embodiment, can find out significantly in conjunction with the accompanying drawings these purposes of the present invention and other purpose and characteristics and
Advantage.
Fig. 1 shows the sectional view according to first embodiment of the fuel injection apparatus of injection carburetor of the present invention.
Fig. 2 shows the sectional view according to second embodiment of the fuel injection apparatus of injection carburetor of the present invention.
Now, be described below first embodiment of the present invention with reference to Fig. 1.Number in the figure 1 is represented a suction pipe, the i.e. suction hole of a Carburetor, label 2 has represented that is positioned at the disc type air valve that aditus laryngis 3 downstreams can be opened, and label 4 has been indicated a break that is connected mutually with lever 2a, and wherein the rotatingshaft of lever 2a and air valve 2 is permanently connected.Under the condition of minimum aperture (initial opening), lever 2a is connected (this condition as shown in Figure 1) with break 4, to prevent that suction pipe 1 from being cut out fully by air valve 2 and leave narrow gap 5a and 5b between the periphery of the inwall of suction pipe 1 and air valve 2.Label 6 is represented a throttle valve that is positioned at air valve 2 downstreams.Label 7 has been indicated a negative pressure driver, and it has comprised the aperture of a barrier film on the lever 2a that is connected to air valve 2 with control air valve 2.Label 9 is represented a low-pressure cavity of being separated by barrier film 8, and this chamber is connected with suction pipe 1 by the opening 9a that is positioned at 5a downstream, gap.When motor was not worked, barrier film 8 was suitable for protecting the position that is applied bias force by spring 9b shown in Figure 1.After engine start, when the negative pressure that produces in opening 9a surpassed predetermined value, barrier film 8 headed on the elastic force of spring 9b and opens air valve 2 to low-pressure cavity 9 direction displacements.Actual motion is not specifically worked driving in the scope negative pressure driver 7 at a slow speed, so that air valve 2 remains on initial opening.Label 10 is represented a break that is connected mutually with throttle valve lever 6a, and this bar 6a links to each other with the rotatingshaft of throttle valve 6 regularly to keep throttle valve 6 to be positioned at minimum aperture.
Label 11 has been represented the main fuel control gear of the fuel chamber of an air cavity that regulator 12 is housed and regulator 13.On behalf of an air cavity regulator 12, label 14 be divided into the barrier film of common pressure chamber 15 and low-pressure cavity 16.Label 17 has been indicated a main negative pressure channel, and the one end communicates with negative cavity 16, and the other end is opened the trunnion 3 in suction pipe 1.On behalf of a fuel chamber regulator 13, label 18 be divided into the barrier film in fuel pressure chamber 19 and fuel injection chamber 20.Label 21 has been represented a main nozzle that is designed to the fuel metering element, and it is communicated with fuel pressure chamber 19 and fuel injection chamber 20.Label 22 has indicated one barrier film 14 is connected to the connecting element of barrier film 18, and it is equipped with and can opens and closes fuel injection mouth 20a fuel injection valve 22a.Label 23 has been indicated a spring that is loaded in the fuel pressure chamber 19, so as barrier film 18 to bottom offset.Label 24 has been represented a main fuel jet passage, and the one end communicates with fuel injection mouth 20a, and the other end communicates with suction pipe 1 between air valve 2 and throttle valve 6.Label 25 has been represented a main bypass channel, and it is walked around main nozzle 21 by bypass fuel pressure chamber 19 and fuel injection chamber 20 are communicated with.Label 26 has been indicated a solenoid valve that is arranged in main bypass channel 26, is used to control the fuel flow rate that separates main nozzle 21.Solenoid valve 26 must be responsible for controlling and regulating fuel flow rate to be controlled at the air fuel ratio of mixture in the main driving scope by a control circuit (not shown).Label 27 has been represented a fuel pump that supplies fuel oil from fuel tank 28 by fuel delivery passage 29 to fuel pressure chamber 19.Label 30 has indicated a fuel pressure that communicates with fuel delivery passage 29 to regulate the chamber.This fuel pressure is regulated chamber 30 and is regulated the fuel pressure that is in the fuel delivery passage 29 so that control the flow velocity that enters the supply fuel oil in fuel pressure chamber 19 through fuel delivery passage 29, also is used for unnecessary fuel oil is sent back to fuel tank 28 by return passage 31 simultaneously.
Label 32 has been indicated a low-speed fuel control device that the air cavity of regulator 33 is housed and the fuel chamber of regulator 34 is housed.On behalf of an air cavity regulator 33, label 35 be divided into the barrier film of common pressure chamber 36 and low-pressure cavity 37.Label 38 has been indicated an auxiliary negative pressure channel, and the one end communicates with low-pressure cavity 37, and the other end is driven the suction pipe 1 to the 5a downstream, gap that is positioned at air valve 2 downstreams.Label 39 has indicated a fuel chamber regulator 34 to be divided into the barrier film in fuel pressure chamber 40 and fuel nozzle chamber 41.Label 42 has been represented a guiding spout that is communicated with fuel pressure chamber and fuel injection chamber 41, and guiding spout 42 is designed for measuring the fuel metering element of the amount of fuel of spraying in drive area at a slow speed.On behalf of a passage, label 43 be connected to connecting element on barrier film 35 and the barrier film 39, and its end is equipped with oil supply valve 43a, barrier film 35 low-pressure cavity 37 from fuel injection chamber 41 separately.Valve 43a is suitable for moving to fuel pressure chamber 40 in fuel inlet 40a, enters the fuel supply rate in fuel pressure chamber 40 and keeps fuel inlet 40a to be in minimum aperture when motor is not worked in order to control.Label 44 has been indicated a fuel gallery, and the one end is connected with the fuel injection chamber of main fuel control gear 11, and the other end communicates with the fuel inlet 40a in the fuel pressure chamber 40 of low-speed fuel control device 32.Label 45 has been represented a low speed fuel injection valve, it has comprised a nozzle chambers 47 and a low-pressure cavity 48 of being separated by barrier film 46, described nozzle chambers 47 is equipped with fuel nozzle 47a and described low-pressure cavity 48 communicates with low-pressure cavity 37, needle-valve 49 is fixedly connected on the barrier film 46 and can opens and closes fuel nozzle 47a, spring 50 by means of barrier film 46 needle-valve 49 displacements so that close fuel nozzle 47a.Label 51 has represented one to be communicated with fuel injection chamber 41 and spray
The low speed fuel gallery in mouth chamber 47.When motor was not worked, fuel nozzle 47a left to the suction pipe 1 in the downstream of throttle valve 6 and by needle-valve 49 and opens and closes nozzle 47a.
Now, will be described below the function of first embodiment of the invention.
At first, in the driven at low speed zone after engine start, the initial opening of determining air valve 2 as shown in Figure 1.Open when some when throttle valve 6, air flows through the gap 5a and the 5b of air valve 2, so produce negative pressure in downstream, described gap.This negative pressure is too little so that can not drive negative pressure driver 7, and air valve 2 remains on initial opening.On the other hand, by auxiliary negative pressure channel 38, this negative pressure is introduced the low-pressure cavity 37 of low-speed fuel control device 32 and the low-pressure cavity 48 of low speed fuel injection valve 45.Like this, barrier film 35 and 46 the two displacement to the right, also displacement to the right and needle-valve 49 are opened fuel nozzle 47a thereby make barrier film 39.When barrier film 39 as mentioned above during displacement to the right, owing to produce the pressure loss in pilot jet 42 downstreams, the fuel pressure in fuel injection chamber 41 descends and the aperture increase of fuel inlet 40a, thereby has improved the fuel pressure in the pressure chamber 40.Correspondingly, a masterpiece of setovering left is used for the barrier film 39 of displacement to the right, and consequently barrier film 39 displacement to the right is till two mutual balances of bias force.Therefore, the aperture of fuel inlet 40a is decided by the negative pressure of introducing low-pressure cavity 37, and the fuel quantity of introducing fuel pressure chamber 40 is proportional to the negative pressure value of introducing low-pressure cavity 37.As a result, 40 import fuel injection chambeies 41 by guiding spout 42 fuel oils metering and that be proportional to negative pressure value from the fuel pressure chamber, and then enter fuel nozzle chamber 47, and spray to air draught through suction pipe 1 by fuel nozzle 47a by low speed fuel gallery 51.As mentioned above owing to improved gas through gap 5a and 5b speed, the further displacement to the right of barrier film 35,39 and connecting element 43, low-speed jet valve 45 allows the fuel oil high velocity jet, improve the oil-supply speed that enters fuel injection chamber 41 from fuel pressure chamber 40 by pilot jet 42 like this, improved the oil-feed speed that enters fuel pressure chamber 41 by fuel inlet 40a simultaneously.On the other hand, equate that with pressure in the common pressure chamber 15 master control set 11 is not worked owing to enter the pressure at negative cavity 16 aditus laryngis 3 places by main negative pressure channel 17, main fuel jet valve 22a makes fuel gallery 24 be in closed condition.Correspondingly, the fuel oil in fuel pressure chamber 19 that infeeds main fuel control gear 11 is complementary with Spraying rate by low speed fuel injection valve 45 on amount, it then infeeds the fuel filler 40a of low-speed fuel control device 32 by main nozzle 21 meterings by fuel gallery 44.As a result, in fuel oil minimum flow velocity scope, can in the driven at low speed zone, can further measure and spray by the fuel oil of main nozzle 21 meterings by guiding spout 42.
Further open when throttle valve 6 under these conditions, improved air velocity by gap 5a and 5b.When the negative pressure of the low-pressure cavity 9 of introducing negative pressure driver 7 by opening 9a surpasses predetermined value, the negative pressure driver is just started working and air valve 2 rotates counterclockwise from the position of its initial opening.Correspondingly, aditus laryngis place in suction pipe 1 produces negative pressure, by main negative pressure channel 17 and be introduced into the low-pressure cavity 16 of main fuel control gear 11, thereby make barrier film 14 under the bias force effect that heads on spring 23 to top offset.Correspondingly, connecting element 22 just makes fuel injection valve 22a leave fuel injection mouth 20a to top offset, thereby allows the fuel oil in the fuel injection chamber 20 to spray in suction pipe 1 by main fuel jet passage 24, and barrier film 18 is also to top offset simultaneously.As mentioned above because barrier film 18 to top offset, the fuel oil of pressurization imports fuel pressure chamber 19, and imports from fuel pressure chamber 19 to fuel injection chamber 20 by main nozzle 21 after metering.Because the fuel pressure difference that raises between fuel pressure chamber 19 and the fuel injection chamber 20 applies a power on the direction that opens and closes fuel injection mouth 20a, when acting on the power on the barrier film 14 and acting under the state of the equilibrium of forces on the barrier film 18 fuel injection valve 22a transfixion.The aperture of fuel jet 20a changes according to the increase and the minimizing of negative pressure, just corresponding raising of fuel injection rate or reduction.And then, the amount of fuel that infeeds fuel injection chamber 20 with by the amount of main nozzle 21 meterings with pass through bypass channel 25 according to the air fuel ratio of the needed mixture of engine-driving situation and equate by the summation of the amount of fuel of the action supply of solenoid valve 26, yet the part of total amount also infeeds in the low-speed fuel control device 32.
We can understand from aforesaid description: the first embodiment of the present invention is suitable for according to the low air velocity in the driven at low speed scope, spray the low speed fuel oil and, spray high-speed fuel oil by low-speed fuel control device 32 by main fuel control gear 11 according to the high air velocity in the main driving scope.Even when air velocitys and the maximum value of fuel injection rate and the ratio of minimum value by fuel control unit 11 and 32 controls approximately is respectively 8X, fuel injection apparatus is done as a wholely can provide a control ratio that is approximately 64X, is enough to the fuel injection apparatus as automobile or motorcycle.In addition, because the fuel oil that is sprayed by low-speed fuel control device 32 is measured by main nozzle 21 and supplies with by fuel flow path 44, fuel oil is a part of being measured by main nozzle 21 in the main driving scope and in main driving scope the accuracy of measuring is not had influence.
Fig. 2 has represented second embodiment according to fuel injection apparatus of the present invention.Describe embodiment 2 with reference to Fig. 2 below, wherein represent by identical label, these yuan with embodiment 1 similar elements
Part is not done special description.In Fig. 2, on behalf of a guiding fuel oil, label 52 enter the low speed fuel gallery in the fuel pressure chamber 40 of low-speed fuel control device 32, and these fuel oils are the fuel injection chambeies 20 that are used for infeeding main fuel control gear 11.Label 53 has been indicated a low speed fuel injection passage, and the one end is opened the fuel injection mouth 41a in low-speed fuel control device 32, and the other end is opened to the suction pipe 1 that is positioned at throttle valve 6 downstreams.Relation between fuel injection mouth 41a and the fuel injection valve 43a be arranged to main fuel control gear 11 in fuel jet 20a identical with the relation between the fuel injection valve 22a.Label 54 has represented one to walk around pilot jet 42 is connected fuel pressure chamber 40 with fuel injection chamber 41 low speed bypass by bypass.Low speed air fuel ratio control electromagnetic valve in low speed bypass 54 of label 55 expressions, it has identical structure with main air fuel ratio control valve 26.
Now, be described below embodiment 2 function.In the driven at low speed zone, air draught moves up with connecting element 43 at low-pressure cavity 37, the barrier film 35 and 39 of the negative pressure introducing low-speed fuel control device 32 of the opening generation of auxiliary negative pressure path 38 via gap 5a and the 5b that air valve 2 produces, fuel jet 41a is opened, fuel oil passes through low speed fuel injection path 53 with the amount corresponding to negative pressure value by fuel injection chamber 41, sprays into suction pipe 1 according to the main fuel control gear 11 identical working principles of describing among Fig. 1.Owing to improved the negative pressure value in air valve 2 downstreams, the aperture of fuel injection part 41a increases, thereby has improved fuel injection rate.The amount of fuel that infeeds fuel injection chamber 41 equal by the amount of fuel of pilot jet 42 meterings and according to the air fuel ratio of the needed mixture of drive condition of motor by the action of solenoid valve 55 summation by the supply amount of fuel of bypass 54.Because main bypass 25 is closed by solenoid valve 26 in this stage, so fuel oil only infeeds fuel pressure chamber 40 by main nozzle 21.
In main drive area, the negative pressure of introducing by aforesaid main negative pressure channel 17 is opened the fuel jet 20a in the main fuel control gear 11.Fuel oil sprays into fuel oil by main fuel jet passage 24 to suction pipe 1, and its amount is corresponding with the negative pressure value that aditus laryngis 3 places produce.The amount of fuel that enters fuel injection chamber 20 equals by the amount of fuel of main nozzle 21 meterings with according to the air fuel ratio of the required mixture of the driving situation of motor, by means of the action of solenoid valve 26 summation by the fuel delivery of bypass 25.Yet the part of total amount also infeeds low-speed fuel control device 32.
We know from description in front, and embodiments of the invention 1 and 2 can be controlled the air fuel ratio of the mixture that infeeds motor exactly in low speed and main drive area.
In addition, undoubtedly can replace the disc type air valve 2 that adopts among the embodiment with piston valve or like.
Claims (8)
1, a kind of fuel injection apparatus of injection carburetor, comprise a low-speed fuel control device from the low relatively air velocity that sucks suction pipe to suction pipe that inject low relatively flow velocity fuel oil according to, a main fuel control gear from the high relatively air velocity of suction suction pipe to suction pipe that inject the fuel oil of relative high flow rate according to, each described low-speed fuel control device and described main fuel control gear comprise the air cavity of a pair of regulator and the fuel chamber of regulator, the fuel chamber of the regulator of described low-speed fuel control device and described main fuel control gear has a common fuel gallery, and be useful on the low speed fuel metering element and the main fuel measuring element of metering fuel oil ejaculation amount, the fuel chamber of the regulator of described low-speed fuel control device is arranged on the downstream part of air cavity of the regulator of described main fuel control gear, it is characterized in that: the fuel chamber of the regulator of described low-speed fuel control device has a low speed fuel oil bypass of walking around described low speed fuel metering element setting by bypass, the fuel chamber of described main fuel control gear regulator has one to walk around the main fuel bypass that described main fuel measuring element is provided with by bypass, and the fuel delivery rate control gear of a control mixture air fuel ratio is arranged in each low speed fuel oil bypass and main fuel bypass.
2, the fuel injection apparatus of injection carburetor according to claim 1, it is characterized in that a fuel injection valve is positioned at the fuel inlet of low-speed fuel control device, when the pressure in described low speed fuel metering element downstream surpasses scheduled pressure value in order to the discharging fuel oil.
3, the fuel injection apparatus of injection carburetor according to claim 2, it is characterized in that described fuel injection valve comprises a nozzle chambers and a low-pressure cavity of being separated by barrier film, low-pressure cavity is designed to be able to be received under the low relatively suction air velocity and the low pressure that produces, and a needle valve member is fixedly connected on the described barrier film and with described fuel injection mouth works.
4, the fuel injection apparatus of injection carburetor according to claim 1 is characterized in that a fuel pump and a fuel pressure adjusting chamber communicate with the fuel delivery passage of the fuel chamber that is communicated with fuel inlet and main fuel control gear regulator.
5, the fuel injection apparatus of injection carburetor according to claim 4 is characterized in that it also comprises a fuel oil bypass and the solenoid valve that can open and close the fuel oil bypass of walking around described main nozzle setting.
6, the fuel injection valve of injection carburetor according to claim 1, it is characterized in that described low-speed fuel control device comprises first common pressure chamber and first low-pressure cavity of being separated by first barrier film, described first low-pressure cavity communicates with the suction pipe that is positioned at the air valve downstream, air valve is opened or closed by means of the negative pressure driver of the negative pressure driving in its downstream, second barrier film is separated from each other the first fuel pressure chamber and first spray chamber, a connecting element links first, on second barrier film and the oil supply valve that can control the first fuel pressure chamber fuel filler aperture is housed, a guiding spout is between the first fuel pressure chamber and the first fuel injection chamber, fuel injection valve of normally cutting out is positioned at the pilot jet downstream and is opened by the negative pressure of introducing first low-pressure cavity, described main fuel control gear comprises second common pressure chamber and second low-pressure cavity that is separated each other by the 3rd barrier film, described second low-pressure cavity communicates with the aditus laryngis of suction pipe, the second fuel pressure chamber and the second fuel injection chamber are separated from each other by the 4th barrier film, a connecting element links the described the 3rd, on the 4th barrier film and the fuel injection valve of normally closing that can control the described second fuel injection chamber fuel jet aperture, the main nozzle between described second fuel pressure chamber and the described second fuel injection chamber be housed.
7, the fuel injection apparatus of injection carburetor according to claim 1, it is characterized in that described low-speed fuel control device comprises first common pressure chamber and first low-pressure cavity that is separated from each other by first barrier film, described first low-pressure cavity communicates with the suction pipe that is positioned at the air valve downstream, air valve is opened or closed by the negative pressure driving negative pressure driver in its downstream, first fuel chamber and first spray chamber are separated from each other by second barrier film, a connecting element is connected to first, on second barrier film and the fuel injection valve of normally cutting out that can control the first fuel injection chamber fuel jet aperture is housed, a guiding spout is between the first fuel pressure chamber and the first fuel injection chamber, described main fuel control gear comprises second common pressure chamber and second low-pressure cavity that is separated from each other by the 3rd barrier film, second low-pressure cavity is connected with the aditus laryngis of suction pipe, the 4th barrier film is separated from each other the second fuel pressure chamber and the second fuel injection chamber, a connecting element is connected to the 3rd, on the 4th barrier film and the fuel injection valve of normally cutting out that can control described the 3rd fuel injection chamber fuel jet aperture is housed, a main nozzle is between the second fuel pressure chamber and the second fuel injection chamber.
8, the fuel injection apparatus of injection carburetor according to claim 7, it is characterized in that it also further comprises the first fuel oil bypass of walking around described guiding spout setting, the solenoid valve that can open or close the first fuel oil bypass, walk around the second fuel oil bypass that described main nozzle is provided with, the solenoid valve that can open or close the described second fuel oil bypass for one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89103520A CN1019841B (en) | 1989-05-29 | 1989-05-29 | The fuel injection apparatus of injection carburetor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89103520A CN1019841B (en) | 1989-05-29 | 1989-05-29 | The fuel injection apparatus of injection carburetor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1047721A CN1047721A (en) | 1990-12-12 |
| CN1019841B true CN1019841B (en) | 1992-12-30 |
Family
ID=4855151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89103520A Expired CN1019841B (en) | 1989-05-29 | 1989-05-29 | The fuel injection apparatus of injection carburetor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1019841B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2399494T3 (en) * | 2008-03-25 | 2013-04-01 | Honda Motor Co., Ltd. | Engine fuel supply device |
| DE112014001291T5 (en) * | 2013-03-14 | 2015-12-03 | Walbro Engine Management L.L.C. | Electronically controlled fuel enrichment system |
-
1989
- 1989-05-29 CN CN89103520A patent/CN1019841B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1047721A (en) | 1990-12-12 |
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