SU1726832A2 - Internal combustion engine water feed device - Google Patents

Abstract

The invention makes it possible to increase the accuracy of water dosing in transient conditions. The device is equipped with an additional channel and a spool with a vacuum drive, which is activated only when the throttle valve is opened sharply, as a result of which a pressure difference appears in the vacuum chamber, which acts on the diaphragm and causes the valve to move to open the channel with the water supply line. on the membrane there is a calibrated orifice, the diameter of which determines the rate of pressure equalization in the cavities of the vacuum chamber. As the pressures equalize, the spring force of the spring enters and causes the spool to move to close the channel. 1 il.

Description

The invention relates to mechanical engineering, in particular to engine-building, namely to devices for supplying water to an internal combustion engine (ICE).

A device for supplying water to an internal combustion engine is known, comprising a water supply line connected to a carburetor equipped with a diffuser with channels for supplying water and fuel, and connected to the water tank through the nozzle and float chamber. However, this device has insufficient accuracy in controlling the water supply in the starting and accelerating modes (acceleration of the engine).

Closest to the proposed device is a device for supplying water to an internal combustion engine, comprising a water supply line connected to a carburetor equipped with a diffuser with channels for supplying water and fuel, and connected to the water tank through the nozzle and float chamber, while the float chamber equipped with an emulsion well in which a tube with holes is installed, connected to the water supply line. Last communicated with the atmosphere through a pipe equipped with a shut-off channel with a bimetallic plate, the jet is placed in the tube of the emulsion well, and the water supply line is connected to the carburetor through an individual channel in the minimum section of the diffuser.

The disadvantage of this device is that with a sudden opening of the throttle valve in transient engine operation modes, the emulsion is not enriched in accordance with the additional fuel supply by the carburetor accelerator pump, which causes detonation during engine operation.

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The purpose of the invention is to improve the accuracy of water metering at transient conditions.

This is achieved by the fact that the device is equipped with an additional pipeline, communicated with the water supply line and a vacuum-driven spool installed in the additional pipeline, which is made in the form of a chamber divided by a spring-loaded diaphragm into two cavities, one of which communicates through the channel with the jet with the rear side of the carburetor and through a calibrated orifice in the membrane - with a different cavity.

The drawing shows a diagram of the proposed device.

Highway 1 water supply. connected to the carburetor 2 through an individual channel 3 in the minimum section of the diffuser 4, equipped with a fuel supply channel 5.

Line 1 is connected to the water tank 6 through the jet 7 and the float chamber 8. The float chamber 8 is equipped with an emulsion well 9 in which tube 10 is installed with openings 11 and 12. The water supply main 1 is connected to the atmosphere through a branch pipe 13 fitted with a shut-off valve 14 with a bimetallic plate 15. A trunk 1 is connected to a water tank 6 through an additional water supply channel 16 having a shut-off element 17 consisting of a cylinder 18 having inside the spool 19c a channel 20 connected through a rod 21 to a membrane 22, and springs 23. Membrane 22 section a vacuum chamber in the cavity 24, and 25. The cavity 24 is connected via conduit 26 with throttle 27 with the carburetor 28 zadrosselnym space, wherein the membrane holds the orifice 29 connecting the cavities 24 and 25.

The device works as follows.

Water from the tank 6 enters the float chamber 8, and then through the nozzle 7 into the tube 10 and through the hole 12 into the emulsion well 9. When the engine is running, the vacuum generated in the diffuser 4 is transferred to the tube 10.

The water level in the tube 10 rises and the water, mixed with the air coming from the hole 11, forms an air emulsion 2, where it is mixed with the fuel mixture. With an increase in the vacuum in the diffuser 4, the tube 10, in addition to water entering through the jet 7, receives water from the emulsion well 9 through the opening 12, as a result of which a temporary re-enrichment of the emulsion occurs.

With a sharp opening of the throttle the accelerator pump carburetor 2 delivers an additional portion of fuel. At this point, an additional portion of water must be supplied using an additional channel 16 having a shut-off element 17. triggered by a sudden drop in the vacuum in the abnormal space, which acts on the diaphragm 22 and spring 23 and causes the slide 19 to move through the stem 20 to the right. At a certain moment, the channel 16 of the additional water supply coincides with the orifice 20 in the piston 19 and the water from the channel 16 enters the main line 1. An additional water supply occurs until the pressure in the cavity 24 is compared with the pressure in the cavity 25 by means of a calibrated orifice 29 the membrane 22 and then the elastic force of the spring 23 causes the valve 19 to move to the right. At the same time, the channel 16 of the additional water supply is blocked by the body of the spool 19, stopping the additional water supply to the line 1.

At the time of starting and warming up the engine, the valve 14 is in the extreme left position, thereby the nozzle 13 communicates the line 1 with the atmosphere, as a result of which, due to the absence of vacuum in the tube 10, no water enters the diffuser 4.

After the engine warms up, the bimetallic plate 15 presses the valve 14 against the socket 13 and water is supplied to the engine.

The invention allows for a sharp opening of the throttles to automatically increase the water supply for the period of engine acceleration, with the additional water supply being proportional to the speed of opening the throttle.

Claims (1)

Invention Formula A device for supplying water to an internal combustion engine according to avt.S. USSR No. 926343, characterized in that, in order to improve the accuracy of water metering under transient conditions, it is equipped with an additional pipeline, communicated with the water supply main line and a vacuum drive-mounted slide valve, which is made in the form of a chamber divided by a spring-loaded membrane into two cavities, one of which is communicated through the channel with the jet with throttle space and through a calibrated orifice in the membrane with the other cavity.