CN1046959A - The oil spout mechanism of injection carburetor - Google Patents
The oil spout mechanism of injection carburetor Download PDFInfo
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- CN1046959A CN1046959A CN 89102937 CN89102937A CN1046959A CN 1046959 A CN1046959 A CN 1046959A CN 89102937 CN89102937 CN 89102937 CN 89102937 A CN89102937 A CN 89102937A CN 1046959 A CN1046959 A CN 1046959A
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- oil spout
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Abstract
The oil spout mechanism of injection carburetor comprises pneumatic part of regulator and oil spout part, relatively is contained in the both sides of suction pipe; The union piece of one band oil nozzle is used for controlling the fuel oil that sprays into suction pipe.Pneumatic part of regulator is made up of negative pressure chamber and air chamber that diaphragm separates.Accumulator and oil spout chamber that its oil spout part is then separated by another diaphragm are formed, and an oil hole is communicated with this two Room.Above-mentioned negative pressure chamber is used for bearing the negative pressure of the venturi tube generation in the self-straw.Its injection valve was just closed jet when the union piece that connects above-mentioned two diaphragms was promoted.This oil spout mechanism simple in structure, low cost of manufacture, sensitivity and precision height.
Description
The present invention relates to a kind of oil spout mechanism of injection carburetor, it is used for according to depending on that negative pressure that air velocity produces regulates the speed of injected fuel aptly.
There has been patent disclosure to cross such oil spout mechanism, for example, day clear and 63-5150 of disclosure special permission.This common oil spout mechanism is used for controlling the flow velocity that fuel oil is injected suction pipe from accumulator by fuel nozzle, so that the oil pressure (accumulator has the negative pressure that produces in venturi tube) in the outlet port of the nozzle of balance connection accumulator, its method is that a regulator of being made up of negative pressure chamber and high-pressure oil chamber and this two Room being separated with diaphragm is installed, and the negative pressure chamber that will introduce this regulator from the negative pressure that places the venturi tube generation in the suction pipe.
There is a long fuel pipe from the high-pressure oil chamber to the oil nozzle in this used oil spout mechanism, so just some problems are arranged, phenomenon time lag out in the cold is arranged between i.e. variation of the airspeed by suction pipe and the fuel flow rate by nozzle ejection change, and the structure of oil spout mechanism own is also complicated.
Main purpose of the present invention is to avoid the problems referred to above of the prior art, and the oil spout mechanism of the comparatively simple injection carburetor of a kind of structure is provided, and the variation of the oil spout speed of this mechanism has high receptance for the variation that sucks airspeed.
Another object of the present invention provides a kind of oil spout mechanism of measuring the injection carburetor that validity is higher and manufacture cost is lower of oil spout speed.
According to the present invention, above-mentioned purpose is to realize by assembling a kind of oil spout mechanism, this oil spout mechanism comprises: the pneumatic part of regulator of being made up of a negative pressure chamber of bearing the negative pressure that produces from the venturi tube that places suction pipe and the air chamber of a maintenance atmospheric pressure, two chambers of this part separate with first diaphragm: be communicated with accumulator by oil hole with one and by a jet fuel oil sprayed into the oil spout part of the regulator of the oil spout chamber of suction pipe forming by an accumulator of introducing fuel oil from oil pump station, separate with second diaphragm between the accumulator of this part: also comprise connection first diaphragm and second diaphragm and have one can the above-mentioned jet of opening and closing the union piece of injection valve.
In most preferred embodiment of the present invention, the oil spout part of pneumatic part of regulator and regulator has been assembled first and second elastic devices respectively, be used in the opposite direction driving above-mentioned union piece, the elasticity of first elastic device is a little more than the elasticity of second elastic device, therefore, when the motor stop is worked, jet is closed by injection valve.The elasticity of first elastic device can be regulated by a kind of suitable controlling mechanism.
According to the present invention, above-mentioned first diaphragm is to move by the negative pressure that produces by the air velocity that places the venturi tube in the suction pipe, injection valve is then opened it by union piece from closed position, so that fuel oil is sprayed from jet with the amount corresponding to airspeed, fuel oil flows to the oil spout chamber by oil hole from accumulator, just keep constant at the indoor oil pressure of this oil spout, and injection valve remains on above-mentioned opening state.
In another embodiment of the present invention, the oil spout of pneumatic part of regulator and regulator part is on the tube wall that on the spot is installed in the throttle valve outlet port, so that constitute a kind of fueling injection equipment.Each pump housing all can be installed this fueling injection equipment.
By describing in detail below in conjunction with accompanying drawing after the most preferred embodiment, the reader will clearer understanding all purposes of the present invention, feature and advantage.
Fig. 1 is first kind of embodiment's the sectional drawing of the oil spout mechanism of injection carburetor of the present invention.
Fig. 2 is second a kind of embodiment's of the present invention sectional drawing.
Below with reference to Fig. 1 first kind of embodiment of the present invention is described.Number in the figure 1 is represented suction pipe, label 2 representatives are contained in the venturi tube in the suction pipe 1, label 3 representatives have the negative pressure channel of opening in venturi tube, label 4 is represented a throttle valve, it is installed in the outlet port of venturi tube 2 in the suction pipe 1, opened and closed by accelerator pedal, label 5 representatives are installed in the inwall of suction pipe 1 and the pneumatic part of regulator in 4 outlet ports of the throttle valve in suction pipe 1.Label 6 is represented negative pressure chamber, it is surrounded by the shell and first diaphragm 9 of pneumatic part of regulator 5, but be communicated with negative pressure channel 3, the negative pressure that produces at venturi tube 2 is introduced into this negative pressure chamber, label 7 is represented an opening that is provided with in the sidewall of the negative pressure chamber 6 that faces suction pipe 1, its slightly larger in diameter is in the diameter of the following union piece that will narrate.Because opening 7 usefulness union pieces seal basically, so the unlikely influence that is subjected to the external pressure of negative pressure chamber 6 of the internal pressure of negative pressure chamber 6.Label 8 represents one to be arranged on air chamber facing to negative pressure chamber's 6 another sides with respect to first diaphragm 9, on behalf of the air pressure in venturi tube 2 outlet ports in the suction pipe 1, label 10 introduce the air flue of air chamber 8 by air outlet 11, label 12 expression is contained in and is used for first diaphragm is pushed to the spring of negative pressure chamber 6 in the air chamber 8, label 13 is represented an adjusting screw in screw-in air chamber 8 sidewalls, and passes through the initial elasticity of support plate 14 Regulation springs 12.Label 15 is represented the oil spout part of regulator, and it is installed in the inwall facing to the suction pipe 1 on one side of the regulator pneumatic part 5 of suction pipe 1.Label 16 is represented an accumulator, it is surrounded by the shell and second diaphragm 17 of the oil spout part 15 of regulator, and a fuel filler 18 arranged, enter the mouth 18 by oil pump (not shown) fuel feeding by this, label 19 is represented a spring that is contained in accumulator 16, be used for pushing second diaphragm to suction pipe, label 20 representatives are with respect to the oil spout chamber of second diaphragm 17 on accumulator 16 opposites, label 21 is represented a jet that has opening, and this opening is located in the sidewall in the face of the oil spout chamber 20 of suction pipe 1.Label 22 is represented an oil hole that is communicated with accumulator 16 and oil spout chamber 20, and when certain oily oil pressure from jet 21 ejections, oil spout chamber 20 reduced, the fuel oil in the accumulator 16 just passed through oil hole inflow oil spout chambers 20 22.Label 23 is represented a union piece, it inserts the opening 7 of negative pressure chamber 6 and the jet 21 of oil spout chamber 20 simultaneously, its two ends connect first diaphragm of pneumatic part of regulator 5 and second diaphragm of regulator oil spout part 15 respectively, label 24 is represented the taper needle valve or the injection valve that are positioned on the union piece 23, and it is used for opening and closing jet 21.The elasticity of spring 19 is transferred to elasticity a little more than spring 12, so, when the pressure in the negative pressure chamber 6 equals the pressure of air chamber 8, jet 21 is just closed by needle valve 24, but in case negative pressure chamber's 8 internal pressures become negative pressure, needle valve 24 will be opened jet 21, the degree of opening depends on the size of negative pressure, thereby control is by the depletion rate of the fuel oil of jet 21 ejections.
The following describes first embodiment's function.Before engine start, do not produce in the venturi tube 2 under the situation of negative pressure, fuel oil can not enter suction pipe 1, because the pressure of negative pressure chamber 6 equals the pressure of air chamber 8, this moment, jet 21 was closed by needle valve 24.Air stream is gone into suction pipe 1 when engine start, in venturi tube 2, produce negative pressure, produced pressure difference between the negative pressure chamber 6 of pneumatic part of regulator 5 and the air chamber 8, first diaphragm 9 is pushed to negative pressure chamber 6, thereby union piece 19 is pushed to the oil spout part 15 of regulator, in the case, because needle valve 24 leaves jet 21, fuel oil just sprays into suction pipe 1 by the space of needle valve 24 and jet 21.So the oil pressure of oil spout chamber 20 reduces, needle valve 24 promotes to the direction of closing, still, on the other hand, again by oil hole 22 from accumulator 16 to oil spout chamber 20 fuel feeding, thereby make the oil pressure of oil spout chamber 20 be elevated to original size again.Therefore, in injection process, it is constant that the pressure of oil spout chamber 20 keeps basically, as long as the negative pressure of negative pressure chamber 6 does not change, the thrust that acts on union piece 23 will be towards the direction of the oil spout part 15 of regulator with towards balance between the direction of pneumatic part of regulator 15, thus that position that needle valve 24 is remained on begin to open.Yet, when the airspeed that sucks suction pipe 1 increases, when introducing the negative pressure increase of negative pressure chamber 6, union piece 23 will be shifted to the oil spout part 15 of regulator, and second diaphragm 17 also moves to the direction of pressure spring 19, so, all can increase from the flowing velocity that accumulator 16 flows into oil spout chamber 20 by oil hole 22 by the oil spout speed and the fuel oil of jet 21.Therefore, this oil spout mechanism just accurately sprays fuel oil according to the airspeed in the suction pipe 1.
In addition, this oil spout mechanism available adjustment screw 13 proportions of ingredients of regulating air and fuel oil also.Specifically, if in advance adjusting screw 13 is rotated towards the flexible direction that increases spring 12, so, same increment for negative pressure in the negative pressure chamber 6, the displacement of first diaphragm 9 will strengthen, and the needle valve 24 of union piece 23 will leave bigger distance of jet, thereby has increased oil spout speed, so, under same negative pressure, obtain higher oil-gas proportions of ingredients.If promptly reduce the flexible direction rotation adjusting screw 13 of spring 12 in advance in the opposite direction, will under same negative pressure, obtain lower oil-gas proportions of ingredients.
From above as can be known, the first embodiment of the present invention (the oil spout part at regulator is directly made jet) has the validity and the receptance of high control fuel oil, and on the whole, the structure of oil spout mechanism is simpler, and manufacture cost is lower.
Below with reference to Fig. 2 second embodiment of the present invention is described.In this embodiment, the oil spout mechanism that partly is made up of the oil spout of pneumatic part of regulator and regulator according to the present invention is installed in the venturi tube 2 in the suction pipe 1.A sidewall inner opening that places facing to the negative pressure chamber 6 of suction pipe 1 of number in the figure 7 ' represent, its diameter is than big several times of the diameter of the opening among first embodiment 7, so that the negative pressure that produces in the venturi tube 2 is introduced negative pressure chamber 6 instantaneously.
Therefore, in a second embodiment, the variation of oil spout speed is more much higher than first embodiment with respect to the receptance of the variation of airspeed, and, because second embodiment does not require the opening that will seal negative pressure chamber as first embodiment with union piece, so its structure is more superior.
In addition, owing to might oil injection mechanism of the present invention be installed corresponding to every aspirating air pipe of each cylinder, so use oil injection mechanism of the present invention might measure fuel oil to each cylinder injection, and improved significantly the distribution performance of the air-fuel mixture thing in the multi-point injection type vaporizer.
Claims (6)
1, a kind of oil spout mechanism of injection carburetor, it comprises following part:
One by one with place suction pipe in the pneumatic part of regulator formed of the negative pressure chamber that is communicated with of venturi tube and an air chamber that communicates with atmosphere, above-mentioned negative pressure chamber and air chamber are spaced-apart by first diaphragm:
The oil spout part of a regulator of forming by an accumulator that is communicated with oil pump station and an oil spout chamber that has a jet that can be communicated with above-mentioned suction pipe, above-mentioned accumulator and oil spout chamber are spaced-apart by second diaphragm:
A union piece that is connected between above-mentioned first diaphragm and above-mentioned second diaphragm and an injection valve that matches with above-mentioned jet is housed is used for fuel oil is sprayed into above-mentioned suction pipe;
First elastic device that is used for promoting above-mentioned union piece is so that opening mobile above-mentioned injection valve on the direction of above-mentioned jet; With
Second elastic device that is used for promoting above-mentioned union piece, so that closing mobile above-mentioned injection valve on the direction of above-mentioned jet, and its elasticity is than the first elastic component height.
2, according to the oil spout mechanism of the injection carburetor of claim 1, it is characterized in that, the oil spout part of above-mentioned pneumatic part of regulator and above-mentioned regulator is installed in the venturi tube of suction pipe relative to one another, and above-mentioned negative pressure chamber directly is communicated with atmosphere by an opening that is positioned at above-mentioned venturi tube.
3, according to the oil spout mechanism of the injection carburetor of claim 1, it is characterized in that, the oil spout part of above-mentioned pneumatic part of regulator and above-mentioned regulator is installed in the annular wall of the above-mentioned suction pipe in the outlet port that is positioned at above-mentioned venturi tube relative to one another, and, side wall inner surface in above-mentioned negative pressure chamber is provided with an opening to above-mentioned oil spout chamber, so as to allow above-mentioned union piece hermetically, slidably therein the motion.
4, according to the oil spout mechanism of the injection carburetor of claim 2 and 3, it also has an adjusting screw that screws in, the elasticity that is used for regulating above-mentioned first elastic device in the sidewall of above-mentioned pneumatic part of regulator.
According to each the oil spout mechanism of injection carburetor in the claim 1 to 4, it is characterized in that 5, above-mentioned injection valve is designed to the needle valve that matches with above-mentioned jet.
6, according to the oil spout mechanism of each injection carburetor in the claim 1 to 5, it is characterized in that, the first above-mentioned elastic device is designed to a kind of wound spring and is inserted between the sidewall of above-mentioned first diaphragm and above-mentioned air chamber, the second above-mentioned elastic device is designed to a kind of wound spring, is inserted between the sidewall of above-mentioned second diaphragm and above-mentioned accumulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89102937 CN1046959A (en) | 1989-05-04 | 1989-05-04 | The oil spout mechanism of injection carburetor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89102937 CN1046959A (en) | 1989-05-04 | 1989-05-04 | The oil spout mechanism of injection carburetor |
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| Publication Number | Publication Date |
|---|---|
| CN1046959A true CN1046959A (en) | 1990-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89102937 Pending CN1046959A (en) | 1989-05-04 | 1989-05-04 | The oil spout mechanism of injection carburetor |
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| CN (1) | CN1046959A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111365148A (en) * | 2020-03-31 | 2020-07-03 | 卢章山 | Oil liquid negative pressure fog-absorbing oil-saving equipment for vehicle |
-
1989
- 1989-05-04 CN CN 89102937 patent/CN1046959A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111365148A (en) * | 2020-03-31 | 2020-07-03 | 卢章山 | Oil liquid negative pressure fog-absorbing oil-saving equipment for vehicle |
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