SU918483A1 - System for feeding liquid and gaseous fuel into carburettor i.c. engine - Google Patents

Description

(54) FOOD SYSTEM OF THE CARBURETTING ENGINE OF INTERNAL COMBUSTION BY LIQUID AND GAS-SHAPED

one

This invention relates to mechanical engineering, in particular to carburetor engines for internal combustion.

A known system for supplying an internal combustion engine with a liquid and gaseous fuel, comprising an inlet pipe and a carburetor installed therein for supplying liquid fuel and a gas mixer, each of which is provided with a throttle valve, a source of gaseous fuel connected to the mixer through a gearbox equipped with an atmospheric chamber, and Throttle actuator from accelerator pedal 1.

The known system does not provide simultaneous feeding of the carburetor engine with liquid and gaseous fuels. This results in increased exhaust emissions and reduced engine fuel efficiency (when operating on liquid fuel) or increased gas consumption and reduced engine power (when running on gas).

The purpose of the invention is to save fuel and reduce exhaust emissions by optimizing the ratio of liquid

FUEL

and gaseous fuels for various engine operating conditions.

The goal is achieved by the fact that the carburetor throttle actuator

J is designed as a lever transmission between it and the accelerator pedal, and the throttle actuator of the gas mixer is designed as a kinematic transmission between the latter and the carburetor throttle valve, with the kinematic transmission

0 is equipped with a telescopic connection, hinged through one lever with the throttle valve of the gas mixer, carburetor, and through the second lever with the throttle valve of the gas mixer, the fungi are additionally connected to each other by a spring, and the atmospheric gearbox camera is additionally connected to the inlet pipe through a spring-loaded valve actuated by a lever mounted on the throttle of the gas mixer.

 The system can be equipped with accelerator pedal position and engine cranking frequency sensors, and an additional spring-loaded valve is made with an electric actuator connected to the current source through a switch connected to the sensors. The carburetor throttle actuator can be equipped with an adjusting screw mounted on the lever. FIG. 1 is a schematic structural diagram of a power system; in fig. 2 is a schematic diagram of a carburetor throttle valve and gas mixer drive; in fig. 3 is a section A-A in FIG. 2; in fig. 4, 6, 8 and 10 - different positions of the parts of the valve actuator; in fig. 5, 7, 9 and 11 are the corresponding valve positions. The power supply system (Fig. 1) contains an inlet pipe 1 and a carburetor 2 installed therein for supplying liquid fuel with a throttle valve 3 and a gas mixer 4 with a throttle valve 5. A gas mixer 4 having a diffuser 6 connected to a source of gaseous fuel through a diaphragm lever gearbox 7, which has chambers of high 8 and low 9 pressure and atmospheric chamber 10. The power supply system is equipped with channels 11 and 12 for supplying gas from chamber 9 of low pressure reducer 7 to the zone of the minimum cross section of the diffuser The throttle valve 5 of the gas blender 4. The atmospheric chamber 10 of the gearbox 7 communicates with the atmosphere through the opening 13 and with the inlet pipe 1 through the channel 14 through the spring-loaded valve 15 and the opening 16. The ratio of the flow sections of the openings 13 and 16 is determined from atmospheric requirements the vacuum chamber 10 required for automatic shutdown of the gearbox 7. On the axis 17 of the throttle valve 3, the lever 18 connected to the accelerator pedal 19 is freely mounted, and on the axis 20 of the throttle valve 5 is fixedly fixed the arms 21. The levers 18 and 21 are pivotally connected with the pin 24 and the sleeve 25 of the telescopic joint 26 and pins 27 with the help of the fingers 22 and 23 respectively. On the other arm of the lever 21, an adjusting screw 28 is installed to press the spring-loaded valve 15. The lever 18 is equipped with three adjustment screws 29-31. With the throttle valve 3 of the carburetor 2 fully closed, the screw 30 is pressed against the upper arm of the double-arm lever 32 fixedly attached to the end of the axis 17 of the throttle valve 3. The screw 31 is pressed against the button of the microswitch 33 connected in series with the relay 34 controlled by the rotation speed sensor 35 into the electric supply circuit of the electromagnet 36. The armature of the electromagnet 36 is connected by a 37 with a spring-loaded valve 15. An ignition distributor distributor is used as a speed sensor. The system works as follows. When the engine is idling, gas (hydrogen is used as gas) from the low pressure chamber 9 of the gearbox 7 enters the gas mixer 4 through channels 11 and 12 (Figs. 1, 4, 5) while turning counterclockwise the lever 18 connected with the pedal 19, the throttle valve 5 of the gas mixer 4 opens, providing an increase in the supply of hydrogen-air mixture, and the initial position of the throttle valve 5 can be adjusted by screw 30. With further rotation of the lever 18, the valve 5 begins to close, reducing the flow of hydrogen Air mixture B engine. The opening of the throttle valve 3 of the carburetor 2 and the flow of the gasoline-air mixture into the engine starts from the moment when the screw 29 on the lever 18 reaches the lower arm of the two shoulders lever 32 (Fig. 6 and 7). Simultaneous powering of the engine with gaseous and liquid fuel is completed when the throttles are fully closed by throttle valve 5 of the gas mixer 4 (Fig. 8 and 9), after which further opening of the throttle valve 3 of the carburetor 2 is accompanied by stretching the spring 27 of the telescopic joint 26 (Fig. 10 and 11 ). The position of the lever 21 of the throttle valve 5 of the gas mixer 4 after the valve 5 is completely closed (Fig. 8-11) corresponds to pressing the adjusting screw 28 on the spring-loaded valve 15 and provides the communication of the inlet pipe 1 with the atmospheric chamber 20 of the gearbox 7. The vacuum occurs in the atmospheric chamber 10, leads to the complete shutdown of the supply of hydrogen to the gas mixer 4, which prevents it from entering the engine and the open throttle valve 3 of the carburetor 2. The automatic shutdown of the supply to the mixer 4 is provided and during engine idle modes forced, when the screw 3 on the lever 18 presses the microswitch button 33 (FIGS. 4 and 5). The microswitch closure in a predetermined frequency range of the engine crankshaft is accompanied by switching on the relay 34 (Fig. 1) and closing the electric supply circuit of the electromagnet 36. The latter moves the valve 15 to the position corresponding to overpressure into the atmospheric chamber 10 of the gearbox /. gearbox This design decision allows, depending on the engine's operating mode, to supply it with liquid or gaseous fuel, as well as liquid and gaseous T | Fuel, at the same time, which provides fuel savings and reduced toxicity of exhaust gases.

Claims (3)

1. A carburetor engine internal combustion system with liquid and gaseous fuel, comprising an inlet pipe and a carburetor installed therein for supplying liquid fuel and a gas mixer, each of which is provided with a throttle valve, a source of gas fuel connected to the mixer through a gearbox equipped atmospheric chamber and throttle actuators from the accelerator pedal, characterized in that, in order to save fuel and reduce exhaust emissions by optimizing the ratio liquid and gaseous fuels under various engine operating conditions, the throttle drive of the carburetor is designed as a lever transmission between it and the accelerator pedal, and the throttle valve of the gas mixer is designed as a kinematic transmission between the last and throttle of the carburetor, and the kinematic transmission is equipped with a telescopic a joint that is pivotally connected through one lever with the throttle valve of the carburetor, and through the second lever with the throttle valve of the gas mix l, further levers are interconnected by a spring, and Atmospheric gear chamber further communicates with the inlet conduit through a spring loaded valve driven by a lever mounted on the throttle a gas mixer. 2. The system according to claim 1, characterized in that it is equipped with sensors for accelerator pedal position and engine crankshaft rotational speed, and the spring-loaded valve is configured with an electric actuator connected to the current source through a switch connected to the sensors. 3. The system according to claim 1, characterized in that the drive of the throttle valve of the carburetor is equipped with an adjusting screw mounted on the lever. Sources of information taken into account in the examination 1. US Patent No. 3659574, cl. 123-121, publ. 1972. 7 3 Xjli Fg / g / -7. FIG. zh6 fig. J j FIG. I FIG. 7 (Dug. 8 Phg / g.Z. Fug.7G