CN2184092Y - Pressure controlling apparatus of air inlet pipe - Google Patents

Abstract

The utility model relates to a pressure controlling apparatus of an air inlet pipe, which is installed on the carburetor of automobiles and motorcycles, and is characterized in that a negative-pressure controlling valve is arranged on an idling mixed air pipe which is in front of the idling air jet in the carburetor, the upper and lower covers of the negative-pressure controlling valve are respectively connected with an upper negative-pressure pipe and a lower negative-pressure pipe which are spaced by a baffle and provided with holes, an elastic component is provided, a cock body plugs the upper negative-pressure pipe and is opened automatically according to the negative pressure in the carburetor, and the additional air is replenished to dilute the internal oil gas, saving fuel and reducing the discharging of the carbon monoxide.

Description

Pressure controlling apparatus of air inlet pipe

The utility model relates to a kind of suction press control gear, outstanding confession under directions is installed in the air port of idling mixture pipe of the vaporizer of automobile and motorcycle, make engine according to this when deceleration or idling conditions, being made extraneous additional air replenish enters in the vaporizer, with the oil gas of overrich in the dilution vaporizer, to avoid air is polluted and wastes the suction press control gear of fuel.

In the automobile and motorcycle automotive engine system, the function of vaporizer is oil plant and air mixing and gives gasification, obtained best knocking fuel effect after making oil gas enter cylinder, and the structure of vaporizer includes the buoy plug, sucking pipe and idling mixture pipe, the indoor buoy that is provided with of this buoy, and buoy is provided with needle-valve, make needle-valve withstand the gasoline outflow opening even when the indoor height of the inflow buoy of the gasoline in the sump rises to certain position, move on the buoy, when descending, amount of gasoline then can withstand the constantly additional gasoline of part because of needle-valve breaks away from, connect from the buoy chamber in addition and establish mixing tube to sucking pipe, and connect establish idle running gasoline pipeline to the idling mixture pipe, and in sucking pipe, be provided with closure, the air intlet of sucking pipe is provided with air-strainer, when opening closure when the engine acceleration, air promptly flows through sucking pipe apace, based on the described phenomenon of bernoulli theorem, the gasoline in the mixing tube promptly was sucked out because mix the static pressure of the mouth of pipe to reduce to form to sucking pipe and with air mixing and was mixed vaporific elaioleucite this moment, and via the radiation heat of outlet pipe with this vaporific mixed oil and gas evaporation and form oil gas, be able to knocking fuel apace after making oil gas enter in the cylinder; And when slowing down or dallying (idling mode), then since the bore of closure reduce or close, have only very a spot of air to enter mixing tube, but very high speed is risen in its gap between closure and vaporizer, make the back of closure produce high negative pressure, and in the sucking pipe of the closure back of the gasoline sucking-off of idle running in the gasoline pipeline being flowed through again, gasified and enter in the cylinder through aforementioned process again.

The structure of the traditional vaporizer of this kind, because when deceleration or idling conditions, this closure bore dwindles or closes, cause the moment negative pressure in the idling mixture pipe excessive, cause the gasoline intake more, produce inner air fuel ratio overrich and the carbon monoxide value is risen, so slow down with idling mode under the CO content of being discharged when quickening for high, and influence health, and waste fuel.

Main purpose of the present utility model provides a kind of suction press control gear overcoming above-mentioned shortcoming, it mainly is that idling mixture pipe parallel connection before the idling air port of vaporizer is equipped with negative pressure control valve, and the upper and lower end of negative pressure control valve respectively is equipped with the negative pressure pipe and reaches negative pressure pipe down, and the inside of negative pressure control valve with dividing plate at interval and be provided with cock body, and be provided with elastic element in the inside of negative pressure control valve, elastic force by elastic element makes cock body clog the negative pressure pipe, when if the pressure in the negative pressure pipe is higher than setting value, made cock body open so that air enters in the negative pressure pipe, and the oil gas of overrich is diluted and reduces the negative pressure of inside, use and lower atmospheric pollution and fuel consumption.

The purpose of this utility model reaches as follows:

A kind of suction press control gear, be to establish negative pressure control valve in the idling air port idling mixture pipe and the connection before of vaporizer, it is characterized in that: this negative pressure control valve comprises a upper cover body and lower cover, and between upper and lower cover body, establish with dividing plate, be provided with air intlet in upper cover body, and be equipped with the negative pressure pipe, be equipped with down the negative pressure pipe in lower cover, be provided with elastic element in addition in lower cover, this elastic element is replaced a cock body and is clogged the negative pressure pipe.

Effect of the present utility model such as Fig. 2, shown in Figure 3:

The utility model be installed in the vehicle testing device and with the negative pressure comparison value of not installing gained behind the vehicle testing device of the present utility model shown in the test curve figure of Fig. 2, in figure, represent that with pb.c.v negative pressure control valve of the present utility model, atm are that atmospheric pressure, pb are that negative pressure, △ pb are negative pressure difference, the KpH of the oblique line part speed of a motor vehicle when serving as test, plotted curve shown in Figure 2 thus can significantly reduce negative pressure after installing the utility model negative pressure control valve as can be known additional, has a significant effect.

The utility model be installed in the vehicle testing device and with the comparison of not installing the carbon monoxide emission value of gained behind the vehicle testing device of the present utility model shown in the test curve figure of Fig. 3, the curve that wherein is positioned at the top does not add negative pressure control valve (pb.c.v) person for showing, the curvilinear system that is positioned at the below shows the person that is added with the negative pressure control valve, oblique line part therebetween then shows the CO content difference between two curves, can reduce CO (carbon monoxide converter) emission significantly after installing negative pressure control valve of the present utility model thus shown in the figure as can be known additional, reduce atmospheric pollution according to this.

Graphic explanation:

Fig. 1 is for showing the utility model structure and being installed in the schematic representation that testing apparatus is done test;

Fig. 2 has or not installing negative pressure plotted curve of the present utility model when testing for showing;

Fig. 3 has or not installing discharging carbon monoxide value plotted curve of the present utility model when testing for showing.

As shown in Figure 1, suction press control gear provided by the utility model (pb.c.v), its preferred embodiment system is installed in idling mixture pipe 18 between vaporizer 3 and the cylinder 5 with negative pressure control valve 1 parallel connection, and this negative pressure control valve 1 includes a upper cover body 11 and lower cover 12, and in lid 11 up and down, establish dividing plate 13 between 12 to have hole 130, be provided with air intlet 10 in upper cover body 11, and be communicated with in being equipped with negative pressure pipe 14 and 11 of idling mixture pipe 18 and upper cover body are between upper cover body 11 and the idling mixture pipe 18, be equipped with down negative pressure pipe 15 in lower cover 12 and 18 of idling mixture pipes in addition, and in lower cover 12 inside, be provided with elastic element 16, and be combined with the cock body 17 that a rubber is made in elastic element 16, by the elastic force of elastic element 16 make cock body 17 keep constantly clogging negative pressure pipe 14 so that on, following negative pressure pipe 14,15 and the idling mixture pipe 18 and the external world between kept the sealing, and when deceleration or idling conditions, only keep small remaining silent owing to closing of closure 41, make air thus minute opening by and forming low pressure near the inlet of idling mixture pipe 18 adsorbed gasoline (the buoy chamber is in not shown in the figures) to form mixed oil and gas, and make mixed oil and gas cause inner negative pressure to raise and oil gas is crossed and rolled by idling mixture pipe 18, even too high negative pressure cock body 17 is open and air outside is entered at this moment, following negative pressure pipe 14,15 interior mixed gass with the dilution overrich, make that contained carbon monoxide is worth to reduce in discharge discarded, pressure in the idling mixture pipe 18 is reduced, make the amount of drawing gasoline reduce and energy program fuel according to this, and on, following negative pressure pipe 14, pressure in 15 then makes cock body 17 clog hole automatically to keep inner setting negative pressure when being lower than setting value, so that then elasticity setting of the height of negative pressure value according to the difference of various car types, so make cock body 17 adjust inner negative pressure at any time in hole 130 places springing so that its constant definite value that remains in, can not rise because of engine temperature, cause the gap smaller between piston ring and cylinder, and the action negative pressure improves and oil absorption is improved, and causes the air fuel ratio formed atmospheric pollution of rising; When quickening, then open gradually because of closure 41, cause air directly to draw gasoline by sucking pipe 4 circulations, open gradually because of air throttle this moment, make negative pressure thereafter reduce, and the negative pressure that acts on the negative pressure control valve descends, if when being lower than setting value, negative pressure control valve 1 is had an effect.

Claims (1)

1, a kind of suction press control gear, be to establish negative pressure control valve in the idling air port idling mixture pipe and the connection before of vaporizer, it is characterized in that: this negative pressure control valve comprises a upper cover body and lower cover, and between upper and lower cover body, establish with dividing plate, be provided with air intlet in upper cover body, and be equipped with the negative pressure pipe, be equipped with down the negative pressure pipe in lower cover, be provided with elastic element in addition in lower cover, this elastic element is replaced a cock body and is clogged the negative pressure pipe.

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