CN201050625Y

CN201050625Y - Liquefied petroleum gas double diaphragm type vaporizing decompressor

Info

Publication number: CN201050625Y
Application number: CNU200720051191XU
Authority: CN
Inventors: 李丹; 申忠华; 任祥林
Original assignee: SHENZHEN ZHONGKE RUANKU TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: SHENZHEN ZHONGKE RUANKU TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2007-04-30
Filing date: 2007-04-30
Publication date: 2008-04-23
Anticipated expiration: 2017-04-30

Abstract

The utility model discloses a liquefied petroleum gas double-film-typed liquefied redactor, which is characterized in that two films are arranged inside the redactor, the pressure-regulating spring chamber film of the redactor is larger than the liquefied petroleum gas output chamber film, one side of both films acts on the environmental air pressure, and the pressure-regulating spring chamber is connected with an engine air inlet pipe through a pressure communicating pipe. With the utility model, the pressure of the engine air inlet pipe with increasing or reducing openness of the valve port is acted on the large film to be exemplified. When the load of the engine is changed, namely, the pressure of the air inlet pipe is changed, the displacement of the valve core is more, and the reaction of the outputting volume of the fuel gas is rapider.

Description

The two diaphragm type gasification and decompression devices of liquefied petroleum gas (LPG)

[technical field]

The utility model relates to a kind of liquefied petroleum gas (LPG) (abbreviation liquefied petroleum gas (LPG)) diaphragm type gasification and decompression device.The utility model is specially adapted to the liquefied petroleum gas supply system of liquefied petroleum gas automobile.

[background technique]

Present known negative pressure output Vehicular liquefied petroleum gas diaphragm type gasification and decompression device can not be used for advanced liquefied petroleum gas injection air supply system, the Vehicular liquefied petroleum gas diaphragm type gasification and decompression device 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 liquefied petroleum gas (LPG) 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 was lower than the defective that uses gasoline when the automobile that causes used LP gas fuel.

[summary of the invention]

Problem at above-mentioned existence, the purpose of this utility model, provide the output of a kind of liquefied petroleum gas (LPG) malleation, the delivery pressure regulation range is wide, delivery pressure stable, can improve the fuel supply response characteristic of liquefied petroleum gas automobile when load variations, improves the cornering ability of liquefied petroleum gas automobile.

In order to achieve the above object, the utility model provides a kind of liquefied petroleum gas (LPG) two diaphragm type gasification and decompression devices, it is characterized in that: two diaphragms are equipped with in decompressor inside, decompressor pressure adjusting spring chamber diaphragm is greater than liquefied petroleum gas (LPG) output air chamber diaphragm, 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.

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 plan view of the two diaphragm type gasification and decompression devices of the utility model liquefied petroleum gas (LPG).

Fig. 2 is the sectional drawing of the two diaphragm type gasification and decompression devices of the utility model liquefied petroleum gas (LPG).

Wherein, decompressor bottom 1, a secondary diaphragm are isolated hold-down segment 2, decompression body 3, decompressor loam cake 4, Regulation spring 5, adjusting knob 6, first diaphragm epicoele 7, vacuum connect 8, first diaphragm 9, secondary diaphragm 10, safety valve 11, needle valve assembly 12, stabilizing spring 13, gaseous liquefied petroleum gas outlet 17, liquid liquefied petroleum gas import interface 18, first air chamber 21, second air chamber 22.

[embodiment]

Below in conjunction with accompanying drawing structure of the present utility model is further detailed.

As Fig. 1, shown in Figure 2: when the liquid LP gas fuel entered the utility model first air chamber 21, through the heating vaporization, throttling entered second air chamber 22 to high-pressure fuel gas through the needle-valve mouth.Turn adjusting knob 6, Regulation spring 5 pretightening forces reach and adjust its outlet pressure, to supply with the fuel quantity that is complementary with motor.

When engine operating condition changed, first diaphragm 9 top degree of vacuum changed, first diaphragm 9 upper and lower moving, and secondary diaphragm 10 is along with motion.Compare with single diaphragm, the first diaphragm 9 that size strengthens changes degree of vacuum thrust and amplifies, thereby has increased the valve port opening of needle valve assembly 12 bottoms of continuous variation, improves the flow response, and the various operating modes that satisfy motor are required.

As shown in Figure 1, when liquid liquefied petroleum gas fuel when joint 18 enters first air chamber 21, through hot hydroecium's heating, be vaporized into liquefied petroleum gas (LPG) gas rapidly, elastic force effect because of spring 5, needle valve assembly 12 is in low level breakdown state, and the gas liquefaction petroleum gas fuel enters second air chamber 22 through needle valve assembly 12 valve ports, enters engine air inlet tube through exporting 17.

The liquefied petroleum gas (LPG) gas pressure acts on secondary diaphragm 10 bottoms in second air chamber 22.When the use traffic that flows out joint 17 less than when needle valve assembly 12 valve ports enter the flow of second air chamber 22, second air chamber, 22 pressure rise.Secondary diaphragm 10 is moving on drive needle valve assembly 12, the first diaphragm 9 under the liquefied petroleum gas (LPG) gas pressure effect of increasing, and spring 5 is compressed slightly.Because of needle valve assembly 12 valve ports reduce, flow through gas flow and reduce, second air chamber, 22 pressure fall slightly, and spring 5 is upheld again slightly, and first diaphragm 9, secondary diaphragm 10, needle valve assembly 12 move down again slightly, and needle valve assembly 12 valve ports are opened again greatly slightly, and second air chamber, 22 pressure rise again.So, spring 5 and first diaphragm 9 top degree of vacuum to liquefied petroleum gas (LPG) gas in the downward comprehensive function power of first diaphragm 9 and second air chamber 22 to secondary diaphragm 10 force balance upwards, needle valve assembly 12 position stabilities, its valve port opening is stable, inflow, eluting gas equate that decompression process is finished.

Rotate counterclockwise adjusting knob 6, spring 5 is further compressed, promote first diaphragm 9, needle valve assembly 12 is moved down, and valve port opening increases, and the gas that first air chamber 21 enters second air chamber 22 increases, second air chamber, 22 pressure raise, and reach new balance up to pressure system; Clockwise turn adjusting knob 6, spring 5 pre compressed magnitudes reduce, and the power of its pushing first diaphragm 9 reduces.The liquefied petroleum gas (LPG) gas pressure of second air chamber 22 does not become, secondary diaphragm 10 moves under this pressure effect, move on the needle valve assembly 12, valve port opening reduces, and the gas that first air chamber 21 enters second air chamber 22 reduces, and pressure reduces, the power that acts on secondary diaphragm bottom up to second air chamber 22 acts on needle valve assembly 12 power with first diaphragm and equates, needle valve assembly 12 no longer moves, and valve port opening is constant, reaches new balance.

Motor adds high-power time valve opening and increases, intake depression reduces, first diaphragm 9 moves down because of the top absolute pressure increases, drive secondary diaphragm 10, needle valve assembly 12 move down, the needle-valve valve port opening increases, enter second air chamber, 22 gases and increase, second air chamber, 22 pressure raise, and the fuel of supply engine increases; Otherwise, when the motor small-power turns round, throttle opening reduces, engine air inlet tube degree of vacuum increases, and first diaphragm 9 top absolute pressures reduce, diaphragm 9,10 and the power system disequilibrium that constitutes with needle valve assembly 12 and move up, the needle-valve valve port opening reduces, the gas that enters second air chamber 22 reduces, and the pressure of second air chamber 22 reduces, and the fuel of supply engine reduces.

In single diaphragm structure, the difference of the upper and lower active force of diaphragm is that pressure difference value multiply by effective diaphragm area up and down; In the utility model structure, this difference is approximately equal to that first diaphragm 9 upper pressure multiply by first diaphragm 9 useful area and secondary diaphragm 10 bottom liquefied petroleum gas (LPG) gas pressures multiply by the poor of secondary diaphragm 10 useful area.Because first diaphragm 9 useful area are greater than secondary diaphragm 10 useful area, so under the identical condition of first diaphragm 9 top degree of vacuum changing values, the active force of the two diaphragm structures of the utility model changes greater than single diaphragm structure, the needle valve assembly 12 valve port opening variation that is the utility model decompressor is bigger, and the flow response performance is better.

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

1. Liquefied petroleum gas double-diaphragm vaporization reducer, characterized in that: there are two diaphragms inside the pressure reducer, the pressure regulator spring chamber diaphragm is larger than the liquefied petroleum gas output gas chamber diaphragm, and the two diaphragms All have a side effect to have ambient atmospheric pressure, and the pressure regulating spring chamber is connected with the engine intake pipe by a pressure communication pipe.

2. The liquefied petroleum gas double-diaphragm vaporizer and pressure reducer according to claim 1, wherein a needle valve with a cylindrical guide section is used between the high and low pressure chambers.

3. The liquefied petroleum gas double-diaphragm vaporizer and pressure reducer according to claim 1, wherein the upper cover is connected to the engine intake pipe through a pressure communication pipe.