SU1657710A1 - Internal combustion engine carburetor - Google Patents

Abstract

Usage: mechanical engineering, in particular carburetors for an internal combustion engine. SUMMARY OF THE INVENTION: A carburetor for an internal combustion engine comprises a housing 1 with a flow channel 2 and air and throttle valves 3 and 4 located in the latter, a diaphragm mechanism 5. with a discharge valve 6, a working chamber 7 connected by vacuum channels 8 and 9 with a throttle space and a movable body 11, kinematically connected with the air damper 3, the control system having a two-substituted distribution electromagnetic device 12, in the power supply circuit 13 of which is installed a thermal Sensitive element 15 and receiver 16, 3 Il.

Description

J

This invention relates to mechanical engineering, in particular to carburetors for an internal combustion engine.

The purpose of the invention is to increase the reliability of the start-up and reduce fuel consumption and exhaust emissions.

FIG. 1 shows a schematic representation of a carburetor for an internal combustion engine with an engine off; figure 2 - the same, with the engine running and at an ambient temperature of up to 18 ° C; in fig. 3 the same, with the engine running and at an ambient temperature above 18 ° C.

The carburetor for an internal combustion engine comprises a housing 1 with a flow channel 2 and located in the last air and throttle valves 3 and 4, a diaphragm mechanism 5 with a discharge valve b, a working chamber 7 connected with vacuum channels 8 and 9 to the throttle space 10, and a movable body 11, kinematically connected with the air damper 3, the control system having an on-off two-position electromagnetic device 12, in the power supply circuit 13 of the winding 14 of which a temperature-sensitive device is installed element 15, and receiver 16. Inlet 17 of distribution two-position electromagnetic device 12 is connected by means of vacuum channels 9 and 18 to throttling space 10, output 19 - to atmosphere, main control channel 20 - to cavity 21 of unloading valve 6 and additional control channel 22 - to

ABOUT

ate

x |

Vj o

31

the receiver 16, the distribution two-position electromagnetic device 12 has a groove 23 and a hole 2fi and 25 on the left. The discharge valve 6 is equipped with a spring 26 and a sealing ring 27 and has screws 28 and 29 for adjustment. In the vacuum channel 9 connecting the throttle space 10 s The working chamber 7 and with the inlet 17, respectively, through the vacuum channels 8 and 18, an air damping nozzle 30 is mounted, and the movable member 11 has a spring 31.

The carburetor operates as follows.

When the engine is not running, the ambient air temperature up to 1 ° C is carburetor elements installed in the positions shown in Fig. 1. In this case, the air damper 3 is installed in the fully closed position, since the moving member 11 is loaded only by the force of the spring 31. The two-position distribution electromagnet device 12 is located in the extreme upper position, since the temperature-sensitive element 15 is open and the winding is de-energized, therefore The cavity 21 of the discharge valve 6 through the main control channel 20, the opening 2 and the outlet 19 is in communication with the atmosphere, and the receiver 16 through the additional control channel 22, the opening 25, the inlet 17 and the channels 18 and 8 communicate with the operating It is equipped with a camera 7 of the diaphragm mechanism 5. The discharge valve 6 under the action of the spring 26 is in the extreme right position, separating the cavity 21 and the working chamber 7. Therefore, when the engine is started, the vacuum in the working chamber 7 increases with a delay, as the receiver 16 and damping nozzle 30 are used and the mobile unit 11 under the influence of increasing vacuum in the orifice space 10 is displaced to the left and, until the unloading valve 6, opens it, due to which the pressure in the working chamber 7 is limited due to and atmospheric air. Therefore, the half-opening of the air damper 3 occurs slow and at a small angle, and all the elements of the carburetor are located in positions at the end of the air damper 3, as shown in Fig. 2. In the process of warming up the motor04

The air damper 3 is opened either automatically or manually.

If the engine starts at an ambient air temperature exceeding 18 ° C, the temperature-sensitive element 15 is closed and the winding 14 is powered, so that the two-way distribution of the electromagnetic device 12 is set to the lowest position, in which the primary and secondary control channels 20 and 22 communicate among themselves through the fall 23, and the entrance 17 and the exit 19 are separated. In this connection, the receiver 16 communicates with the cavity 21, and the working chamber 7 communicates via channels 8 and 9 only with the rear axle space 10. Therefore, when starting the digiget, the vacuum in the working chamber 7 increases almost without delay until body 11 will not reach the discharge valve 6 and will begin to open it. Further, the vacuum in the working chamber 7 grows slowly due to the connection of the receiver 16 to the cavity 21, as well as due to the damping nozzle 30. In connection with this, the opening of the air damper 3 in the initial stage occurs at high speed (almost at the opening angle, as shown in Fig. 2), and then further slow-moving slightly occurs, so that the air inlet 3 is set to the B position, as shown in Fig. 3 (and the carburetor elements are located at the positions as shown in FIG. 3). Thus, at start-up and warming up of the engine, various air flap 3 is opened at different ambient temperatures, which will give a boost to start-up reliability, the required fuel consumption in the carburetor is warmed up, and exhaust gases have a low content of toxic components.

Claims (1)

Invention Formula A carburetor for an internal combustion engine, comprising a housing with a flow channel and located in the last air and throttle valves, a diaphragm mechanism with a unloading valve, a working chamber connected to a rear axle valve5165771 s.tramstopom. and a moving body, kinematically connected with an air damper, and a control system having a distribution dpupsic electromagnetic device, in the winding power supply circuit of which there is a thermal element, and the input of the distribution two-position electromagnetic device is connected via a vacuum channel to the throttle space the control channel to the unloading valve, so that, in order to increase the reliability of the start-up and to reduce the flow rate fuel and toxic emissions in the warm-up mode, the control system is equipped with a receiver and ten 15 20 28 27 26 7 315 22 ABOUT five 0 an air damping nozzle and distributing the two-position electromagnetic device with an additional control channel connected to the receiver, the air damping nozzle installed in the vacuum channel connecting the throttling space to the working chamber of the diaphragm mechanism and the input of the two-position electromagnetic distribution device, and the latter is completed with the possibility in one position of communication of the main and additional control channels with the output and the input, and in a different position, the communication between the two control channels and the overlapping of the input and output. YU 1 2127 26 7 31 5 П 2 26 7 31 5 П li / pc 3