SU395606A1 - - Google Patents

Description

DEVICE FOR TERMINATION OF SUPPLY OF FUEL IN INTERNAL COMBUSTION ENGINE

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FIELD OF THE INVENTION The invention relates to the field of enginebuilding, in particular, to devices for the continuous supply of fuel.

Devices are known for stopping the supply of tonping to an internal combustion engine in forced idling mode, comprising a valve installed in an intake manifold connected to an air cleaner by means of an overflow channel equipped with a valve having an actuator and, together with the actuator of the valve, a control circuit with contacts of sensors of the throttle valve of the carburetor and vacuum in the intake manifold.

The purpose of the invention is to increase instrumental reliability and simplify the design.

This is achieved by the fact that the damper and valve actuators are made in the form of autonomous electromagnets connected in parallel to the control circuit, and the valve is equipped with a membrane installed in the drive electromagnet housing, and the permembrane housing cavity is connected to the overflow cavity between the intake valve

pipeline. In addition, to regulate the amount of bypass air in the channel, a butterfly valve is installed between the valve and the inlet pipe manually controlled, and in order to control the temperature sensor, for example, engine coolant, the sensor contacts are installed next to the sensor contacts. The drawing shows a diagram of the proposed device for stopping fuel iodach into an internal combustion engine.

The device for stopping fuel iodine into the internal combustion engine in the forced idle mode. The valve contains a damper / installed in the intake pipe 2 behind the carburetor 3. The inlet pipe 2 is connected to an air cleaner (not shown) through the bypass of the bypass pipe 4

and 5, between which a valve 6 is installed, which is rigidly connected to the hollow heart 7 of the driving electromagnet 8 and is equipped with a membrane I installed in the housing 10. The membrane 10 of the housing 10 is connected to the cavity of the nozzle 4. The damper / Also equipped with an elasim trimagimt 12, which together with the electromagnet 8 is connected in parallel to the control board. In the control circuit, the contacts 14 of the throttle position sensor 15 of the carburettor Y and the contacts 16 and 17 of the discharge sensor in the intake pipe 2 are installed in series. The contacts 16 and 17 are connected to the stops 18 and 19 of the vacuum sensor through a blocking device 2i. The stops Id and 19, respectively, are located on the membranes 21 and 22. The membrane 21 is provided with a weak spring 23, and the membrane 22 is equipped with a strong spring 24. The submembrane cavities of the membranes 21 and 22 are connected to the cavity of the nozzle 4 by means of the channel 25. The nozzle 4 has a rotary shutter 26 manually controlled. The control circuit is made single-wire and connected to the battery 27, and through the lever 28 of the throttle valve 15 with a mass. The device works in the following way. In the drawing, the device is depicted in a position where the engine is operating in all modes except the mode of forced idling. The throttle valve 15 of the carburetor Y can be opened or closed as shown in the drawing. Although the contacts 14 are closed, the control unit is open, since the membrane 21 and the stop 18 are in the upper position (the vacuum in the pipeline 2 is not enough to move them down), the contacts 16 and 16 are open. As a result, the electromagnets 8 and 12 are disconnected from the battery, and the valve 6 is tightly pressed against the seat and the flap / is in the open position. In the forced idle mode, the vacuum in the intake manifold 2 increases and the vacuum under the membranes 21 and 22 increases at the same time. When the vacuum exceeds the gap, the normal idle speed, membranes 21 and 22 is lowered. In this respect, the stops 18 and 19 lower and provide the opening of the contacts 16 and 17. Since in the forced idling mode the throttle valve 15 is closed and the contacts 14 are closed, when the contacts 16 and 17 are closed, the control also closes, due to which the electromagnets 8 and 12 are connected to the battery 27. Under the action of the electromagnet 12, the flap / closes to stop the flow of the air-fuel mixture from the carburetor 3 into the inlet pipe 2. At the same time, the valve 6 is moved by the electromagnet 8 and communicates the pipes 4 and 5. As a result, knoy conduit 2 out of air cleaner nozzles 4 and 5 starts flowing air umenscha underpressure therein to a predetermined value. However, reducing the vacuum in the pipe 2 cannot open the contacts 16 and 17, as they are held in this position by the locking device 20. If the forced idling mode is not normal for the engine to go to the SOW11 mode, the vacuum in the intake pipe will decrease to such a value wherein the diaphragms 21 and 22, by the action of the spring, will rise, and the stops 18 and 19 will open the contacts 16 and 17. As a result, the control unit will open and the electromagnets 8 and 12 will be disconnected from the battery 27, therefore the valve pan 6 by the spring 23 on the saddle with children and disconnect pipes 4 and 5. After that the air supply into the conduit 2 is stopped, idling of carburettor system 3, the air-fuel mixture begins to act and moves to normal engine idling speed. If the engine switches to load mode from the forced idling mode, then the throttle valve 15 opens and opens the contacts 14. The control circuit opens and the electromagnets 8 and J2 are disconnected from the battery. Valve 6 and damper 1 are moved to the initial position, and from the carburetor into the pipeline 2 the air-to-air mixture begins to flow with the required composition depending on the throttle valve position. To change the amount of incoming air in the forced idling mode, depending on the operating conditions, the flap 26 serves. To prevent the engine from overcooling during the long forced idling mode, a 2U switch is installed, which provides for manual disconnection of the electromagnet 8 from the battery 27 and closing of the valve 6. Nr In this, the operation of the valve 1 is unchanged. The force of the electromagnet 8 is significantly reduced due to the installation of the valve 6 on the membrane 9 and the connection of the chamber U with the nozzle 4. At the same time, a raft valve 6 is provided to the saddle in all modes except the forced idle mode. To shut down the device when the engine is cold, the control unit in series with contacts M, 16 and 17 of the throttle valve 1d i vacuum sensor in the intake pipe 2 establishes the contacts of a temperature sensor, such as engine coolant. 1. The device for stopping the supply of fuel to an internal combustion engine in the forced idling mode, comprising a damper installed in the intake manifold connected to the air cleaner by an overflow channel equipped with an actuator valve that has a throttle position with the damper actuator. carburetor damper and vacuum in the intake manifold, characterized in that with a distance to increase operating reliability and simplify the design , the damper and valve actuators are autonomous electro-magnetic soils connected in parallel to the control circuit, and the valve is equipped with a membrane installed in the housing of the driving electromagnet, and the permembrane cavity of the housing is connected to the cavity of the bypass channel between the valve and the inlet pipe. 2. An apparatus according to claim 1, characterized in that, in order to regulate the amount of bypass air, a butterfly valve is manually operated in the channel between the valve and the runner pipe. 3. The device according to PP. 1 and 2, characterized in that in the control circuit in series with the contacts of the sensors, contacts of a temperature sensor, for example, engine coolant, are installed.