SU1186819A1 - Arrangement for cutting off fuel feed into internal combustion engine - Google Patents

Abstract

A device for stopping the supply of fuel to the engine of the battery, which contains a float chamber with the main metering system, a mixing chamber with a throttle valve, and a battery with a pneumoelectric plug, placed in the channel for supplying fuel to the jet of the jet heater and the battery heater, fitted with an orifice tube; , characterized in that, in order to improve the performance characteristics, the passage opening of the closure member is communicated through the inlets with oplavkovoy chamber, the ratio of the total sectional area of the inlet openings to the cross-sectional area of the passage openings is equal to 1.5-2.0, and the ratio of the sectional area of the passage openings to openings sectional area of the mixing chamber orifice is equal to 1.2-1.8.

Description

The invention relates to a machine structure, and in particular to devices for stopping the supply of fuel to an internal combustion engine.

The purpose of the invention is to improve the performance of internal combustion engines.

In FIG. 1 shows a schematic diagram of the proposed device; in FIG. 2-section AA in FIG. 1.

The device contains a locking member, which consists of a housing 1 located in the supply channel 2 of the fuel * of the carburetor 3, core 4, with a valve 5. In the housing 1 there are inlet openings 6 for supplying fuel from the float chamber 7 of the carburetor 3, and the solenoid • 8 and spring 9 are also located. Behind the throttle valve 20 to the inlet is a membrane membrane from the cavity 12 of the porn spring 13, valve 15, which is connected to the atmosphere through an opening 16 made in the cover 17.'An electrical switch is fixed to the latter 18, the rod 19 of which is pressed by a spring 20 to the membrane 14. The winding of the solenoid 8, the pipe of the sub-chamber 11, sostorezheneniya, razmembrany 14, 25 switch 18 and the second switch 21, manually controlled, are connected in series.

The passage opening 22 (annular channel) of the locking member is communicated through the inlet 6 with the float chamber 7 and through the opening 23 of the nozzle 24 with the mixing chamber 25.

The device operates as follows.

When the switch 21 is closed and the engine is operating in a mode other than the forced idle mode, the solenoid 8 is de-energized due to insufficient vacuum * behind the throttle valve 10 to overcome the force of the spring 13 and to close the contact of the switch 18. As a result, through the “gap between the valve 5

inlet 6, hole mixer idle motor

1186819 - ^2nd end of the housing 1 the fuel from the float chamber 7, the through hole 22 and the nozzle 24 enters the hydrochloric chamber 25. In operation, load operation on forced vacuum after the throttle valve 10 is increased, whereby the pressure differential deforms the membrane 14, the spring 13 is compressed, and the spring 20 is opened. The rod 19, moving, closes the contacts of the switch 18th in the winding of the solenoid 8 receives current. As a result, the core 4 compresses the spring 9 and presses the valve 5 against the end of the housing 1, cutting off the fuel supply to the engine.

I.

By reducing the angular speed. the crankshaft of the engine to a value corresponding to the active idle speed, or when the engine is switched to the load mode, the rarefaction value behind the throttle valve is reduced, the spring 13 is opened, returning the spring 20 and the rod 19 to its original position, and opens the contacts of the switch 18. The solenoid 8 is de-energized, spring 9 pulls the valve 5 and the fuel again enters the engine. ·

The size of the passage opening 22 of the shut-off member is limited by structural restrictions imposed by the size of the fuel supply channel 2, and especially for existing carburetor designs that do not provide for the installation of fuel-blocking devices. Therefore, the minimum allowable value of the through hole 22 is the most important design parameter that affects the power performance of the engine. Moreover, the ratio of the total cross-sectional area of the inlet openings 6 to the area of the through-hole 22 is 1.5-2.0, and the ratio of the cross-sectional area of the through-hole 22 to the cross-sectional area of the opening of the mixing chamber of the nozzle 24 is 1.2-1.8,

25.

VNIIIPI

Circulation 537

Order 6523/37

Subscription

Branch of PPP Patent,

Uzhhorod, Project 4,

Claims (1)

A DEVICE FOR STOPPING FUEL SUPPLY TO THE INTERNAL COMBUSTION ENGINE, comprising a float chamber with a main metering system, a mixing chamber with a throttle valve and a shut-off element with a through hole, located in the fuel supply channel to the mixing chamber nozzle and equipped with a pneumatic discharge port a space characterized in that, in order to improve performance, the passage opening of the locking member is communicated through the inlet openings with the float oic chamber, the ratio of the total cross-sectional area of the inlet openings to the cross-sectional area equal to 1.5-2.0 circulation port, and the ratio of the sectional area crossing the holes to the area of the nozzle opening cross section of the mixing chamber is equal to 1.2-1.8. Fia?