CN201050690Y - Natural gas double diaphragm type decompressor - Google Patents
Natural gas double diaphragm type decompressor Download PDFInfo
- Publication number
- CN201050690Y CN201050690Y CNU2007200511892U CN200720051189U CN201050690Y CN 201050690 Y CN201050690 Y CN 201050690Y CN U2007200511892 U CNU2007200511892 U CN U2007200511892U CN 200720051189 U CN200720051189 U CN 200720051189U CN 201050690 Y CN201050690 Y CN 201050690Y
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- CN
- China
- Prior art keywords
- pressure
- diaphragm
- engine
- valve
- natural gas
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
A natural gas double diaphragm reductor is characterized in that: the inner part of a reductor is provided with two diaphragms, the diaphragms of a voltage regulator spring chamber on the reductor are greater than that of the output natural gas chamber, both the two diaphragms have a diaphragm-side action by the environmental atmospheric pressure, a voltage communicating pipe communicates with the voltage regulator spring chamber and an intake pipe of the engine. The reductor of the utility model allows the pressure of the intake pipe of the engine that enables the opening of valve ports to increase or decrease to act on a big diaphragm, thereby enlarging the action thereof. When the load of the engine changes, that is, when the pressure of the intake pipe changes, the displacement of a valve plug becomes bigger, and the response of the gas output is faster.
Description
[technical field]
The utility model relates to a kind of compressed natural gas (hereinafter to be referred as rock gas) diaphragm type decompressor, relates in particular to the natural gas supply device that is applicable to gas-fueled vehicles.
[background technique]
Present known negative pressure output natural gas used for automobile diaphragm type decompressor can not be used for advanced natural gas injection air supply system; The natural gas used for automobile diaphragm type decompressor of present known malleation output is equipped with single diaphragm, pressure adjusting spring power and engine charge pipe pressure in diaphragm one side effect, the rock gas delivery pressure in the opposite side effect, slower to the response that engine load changes, be unfavorable for remedying because of reasons such as combustion gas density are low, acceleration is lower than the defective that uses gasoline during the automobile natural gas fuel fuel that causes.
[summary of the invention]
Problem at above-mentioned existence, the purpose of this utility model, provide the output of a kind of rock gas combustion gas malleation, the delivery pressure regulation range is wide, delivery pressure stable, can improve the fuel supply response characteristic of gas-fueled vehicles when load variations, improves the cornering ability of gas-fueled vehicles.
In order to achieve the above object, the utility model provides a kind of rock gas two diaphragm type decompressors, it is characterized in that: two diaphragms are equipped with in decompressor inside, decompressor pressure adjusting spring chamber diaphragm is greater than rock gas output air chamber diaphragm, two diaphragms all have a side action that ambient air pressure is arranged, and the pressure adjusting spring chamber has the pressure communication pipe to link to each other with engine air inlet tube.
Between the high and low pressure air chamber, adopt the needle-valve that the cylinder guide section is arranged.
Be stamped the joint that is connected with engine air inlet tube on described.
Advantage of the present utility model is: different with single-iris, in the spool power system of the utility model structure, the engine charge pipe pressure that the spool aperture is strengthened acts on the big diaphragm.Its effect is exaggerated, and when the engine load variation was the suction press variation, the displacement of spool was bigger, and the response of combustion gas output quantity is faster.
[description of drawings]
Fig. 1 is the form structure schematic representation of the two diaphragm type decompressors of the utility model rock gas.
Fig. 2 is the sectional drawing of the two diaphragm type decompressors of the utility model rock gas.
[embodiment]
Below in conjunction with accompanying drawing structure of the present utility model is further detailed.
As Fig. 1, shown in Figure 2: the utility model is as figure: when decompressor did not have gas and enters, because of the elastic force effect of pressure adjusting spring 8, needle-valve 15 was in the breakdown state.The high-pressure natural gas gaseous fuel enters second air chamber 14 through needle-valve 15 valve port expenditure and pressures, enters engine air inlet tube through air outlet adapter 2 again, to realize the motor air feed.
The outlet pressure adjustment of the utility model second air chamber 14 is mainly by following scheme implementation.Regulating and controlling bar 10, act on needle-valve 15 valve rod tops by regulating block 9, pressure adjusting spring 8, first diaphragm 12.Simultaneously, gas pressure acts on first diaphragm 12 bottoms in second air chamber 14, and Returnning spring 17 acts on needle-valve 15 bottoms, and needle-valve 15 two ends are stressed to be equated, makes it to be in state of equilibrium, to control the outlet pressure that its opening degree realizes that it is stable.By regulating the pre compressed magnitude of pressure adjusting spring 8, can guarantee that the pressure of second air chamber 14 is adjusted between (0.06MPa-0.12MPa), promotion is to 0.13MPa.According to different engine displacement, select optimum outlet pressure value, satisfy the demand for fuel of various motors.Rated pressure of the present utility model is made as 0.1MPa.When needs increase second air chamber, 14 fuel outlet pressure, rotate counterclockwise adjustable lever 10, regulating block 9 presses down pressure adjusting spring 8, press down needle-valve 15 by first diaphragm 12, originally the balance of She Dinging is destroyed, and needle-valve 15 apertures increase, and the gas that first air chamber 16 enters second air chamber 14 increases, second air chamber pressure raises, up to reaching new balance.Otherwise, when needs reduce the outlet pressure of second air chamber 14, clockwise turn adjustable lever 10, regulating block 9 moves upward, original balance is destroyed, needle-valve 15 moves upward under the gas effect of second air chamber 14, needle-valve 15 apertures reduce, this moment, first air chamber 16 entered the gas minimizing of second air chamber 14, the pressure of second air chamber 14 reduces, the power that acts on the needle-valve bottom up to second air chamber 14 equates that with the power that first diaphragm 12 acts on needle-valve 15 tops needle-valve 15 no longer moves, and reaches new balance.
Wherein said second air chamber, 14 outlet pressures change relevant with engine air inlet tube 1 vacuum.The changed condition of motor requires to change for its fuel quantity that provides adapts to this, so the outlet pressure of second air chamber 14 must change and change along with engine operating condition.This variation is finished by vacuum valve 11, secondary diaphragm 6, first diaphragm 12, needle-valve 15.Vacuum tube 11 links to each other with engine air inlet tube, and engine operating condition changes, and the degree of vacuum in its suction tude takes place by corresponding the variation.When motor needs a large amount of fuel, throttle opening increases, engine air inlet tube degree of vacuum reduces, and secondary diaphragm 6 is mobile slightly to air second air chamber 14, drives first diaphragm 12 and moves down slightly, balance is originally broken, needle-valve 15 moves down under the pressure effect of first diaphragm 12 slightly, and the aperture of needle-valve 15 increases, and the gas that enters second air chamber 14 increases, second air chamber, 14 pressure raise, and the fuel of supply engine increases; Otherwise, when the motor small-power turns round, the corresponding minimizing of required fuel, this moment, the engine air throttle aperture reduced, engine charge trunnion degree of vacuum increases, secondary diaphragm 6 is mobile slightly to the air air chamber, driving first diaphragm 12 moves on slightly, needle-valve 15 moves up under the pressurized gas of first air chamber 16 and Returnning spring acting in conjunction, needle-valve 15 apertures reduce, and the gas that enters two air chambers 14 reduces, and the pressure of two air chambers 14 reduces, the fuel of supply engine reduces, to satisfy the various operating mode needs of motor.
Compare with single diaphragm, the secondary diaphragm 6 that size strengthens changes degree of vacuum thrust and amplifies, thereby has increased the valve port opening of needle valve assembly 15 bottoms of continuous variation, improves the flow response, and the various operating modes that satisfy motor are required.
The above person is the utility model most preferred embodiment only, is not to be used to limit scope of the present utility model, and all equivalences of being done according to the utility model claim change or modify, and are all the utility model and contain.
Claims (3)
1. two diaphragm type decompressors of rock gas, it is characterized in that: two diaphragms are equipped with in decompressor inside, decompressor pressure adjusting spring chamber diaphragm is greater than rock gas output air chamber diaphragm, and two diaphragms all have a side action that ambient air pressure is arranged, and pressure adjusting spring chamber and engine air inlet tube have the pressure communication pipe to link.
2. the two diaphragm type decompressors of rock gas according to claim 1 is characterized in that: between the high and low pressure air chamber, adopt the needle-valve that the cylinder guide section is arranged.
3. the two diaphragm type decompressors of rock gas according to claim 1 is characterized in that: have the pressure communication pipe to be connected between described loam cake and engine air inlet tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200511892U CN201050690Y (en) | 2007-04-30 | 2007-04-30 | Natural gas double diaphragm type decompressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200511892U CN201050690Y (en) | 2007-04-30 | 2007-04-30 | Natural gas double diaphragm type decompressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201050690Y true CN201050690Y (en) | 2008-04-23 |
Family
ID=39337177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200511892U Expired - Fee Related CN201050690Y (en) | 2007-04-30 | 2007-04-30 | Natural gas double diaphragm type decompressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201050690Y (en) |
-
2007
- 2007-04-30 CN CNU2007200511892U patent/CN201050690Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080423 Termination date: 20150430 |
|
| EXPY | Termination of patent right or utility model |