SU1019097A1 - Gaseous i.c. engine fuel feed device - Google Patents

Abstract

1. POWER SUPPLY SYSTEM OF INTERNAL COMBUSTION GAS ENGINE, containing a gas cylinder, a gas reducer-evaporator with first and second stages connected to it, a carburetor-mixer with a diffuser, a throttle valve, a system of idling and a mixing chamber, characterized in that in order to increase fuel efficiency and reduce exhaust emissions in active and forced idling modes, an additional diffuser, placed under the throttle valve, is connected. a second stage channel with a valve having an electromagnetic actuator and connected with a co

Description

with throttle, crankshaft, throttle space and atmosphere.

2. The system of claim 1, wherein the valve is designed as a spring-loaded diaphragm located in the housing and a needle mounted on the latter, with the supra-diaphragm cavity connected to the channel.

3. The system of claim 1, wherein the electromagnetic actuator comprises a housing with a winding and three openings and a spool with sleeves accommodated therein, one of the openings associated with a throttle space, the second with a subdiffractional cavity of the valve, and the third - with the atmosphere.

one

The invention relates to mechanical engineering, and in particular to gas supply systems for internal combustion engines.

A gas supply system for an internal combustion engine comprising a gas cylinder, a gas reducer-evaporator with first and second stages, a carburetor-mixer with a diffuser, a throttle valve, an idling system, and a mixing chamber 1 are known.

The lack of a known system is associated with the imperfection of the process of mixing when the engine is at idle, which impairs the fuel economy and exhaust emissions.

The aim of the invention is to increase fuel efficiency and reduce exhaust emissions in active and forced idling modes.

The goal is achieved by the fact that the gas supply system of the internal combustion engine, containing a gas cylinder, a gas reducer-evaporator with first and second stages connected to it, a carburetor-mixer with a diffuser, a throttle valve, an idling system and a mixing chamber, is equipped with an additional diffuser under the throttle valve communicated with the second stage by a channel with a valve having an electromagnetic actuator and connected to the throttle valve, the crankshaft, the throttle valve space and atmosphere.

The valve can be made in the form of a spring-loaded diaphragm located in the housing and a needle fixed to the latter, with the supra diaphragm cavity connected to the channel.

The electromagnetic actuator may comprise a housing with a winding and three openings and a slide valve located in it, one of the openings being connected with the throttle space, the second one - with. subphrenic valve cavity, and the third - with the atmosphere.

FIG. 1 shows a power system diagram; in fig. 2 - additional diffuser; in fig. 3 shows section A-A in FIG. 2;

in fig. 4 - valve when operating at idle; in fig. 5 - electromagnetic drive.

The power system contains a gas cylinder (not shown), a gas reducer-evaporator 1 connected to it from the first and second stages 2 and 3, respectively, a carburetor-mixer 4 with a diffuser 5, a throttle valve 6, a mixing chamber 7, a main 8 metering line system topics.

The power supply system is provided with an additional diffuser 9 located under the throttle valve 6, communicating with the second stage 3 channel 10 with valve 11, having an electromagnetic actuator 12 connected to the throttle valve 6, the crankshaft, throttle space 13 and the solenoid valve 14. The valve 11 is made in view of the spring-loaded diaphragm 16 and needle 17 placed in the housing 15. The over-diaphragm cavity 18 is connected to the channel 10, and the sub-diaphragm cavity 19 of the valve 11 is connected to the cavity 20 of the solenoid valve 14. Electromagnetic actuator 12 comprises a housing 21 with a winding 22 and three holes 23-25.

5 Hole 23 through pipe 26 communicated with throttle space 13. Cavity. 20 through the hole 24 and the pipe 27 is in communication with the atmosphere. The sub-diaphragm cavity 19 of the valve And through the pipe 28 and the hole 25 is in communication with the cavity 20. The spool 29 is equipped with three channels and is spring-loaded with a spring 30.

Reducer-evaporator 1 is equipped with a discharge chamber 31, communicated through the channel 32 with the transition box 33 air

 filter. The carburetor blender 4 consists of two nozzles. One of the nozzles 34 is installed in the primary chamber 35. carburetor-blender 4. Line 8 of the main metering system connects the second stage 3 of the reducer-evaporator 1 with

0 nozzle 34 carburetor-mixer 4.

The additional diffuser 5 consists of a housing 36, the actual diffuser 37, intended to improve the mixture formation at idle and at partial loads. For this purpose, an annular insert 38 is placed in it, in which radial holes 39 are made for nodachi gas from the channel 40. During idle running, air enters through the openings 41 in the throttle valve 6. Adjusting the gas supply when the engine is idling is carried out using the adjusting screw 42 located in the channel 10. The force of pressing the needle 17 to the housing 15 is provided by the spring 43. The electromagnetic actuator 12 consists of the throttle valve 6 position sensor 44 and the crankshaft speed sensor 45. The system works as follows. When the engine is in idle mode, the gas from the liquefied gas source enters the reducer-accumulator 1, and is reduced in the first and second stages x 2 and 3, respectively, is fed into the channel 10, and then to valve I. Gas, passage through the valve 11 enters an additional diffuser 9 and, displaced with the air entering through the opening 41, forms a homogenous fueled combustible mixture, since at idling throttle valve 6 is closed, the contacts of sensor 44 of the throttle position 6 are open. However, through the crankshaft speed sensor 45, the electrical control circuit of the solenoid valve 14 is closed. As a result of this, the solenoid valve 14 connects through the pipeline 26 a throttle space1 1U J X V / ii ty V / ICA CLAf J a / C WXjV, VrX lunUCllt / Xj-IL 13 13 with the subdiffraction cavity 19 of valve II through pipe 28. The vacuum created in the additional diffuser 9 is transmitted through channel 10 to the diaphragm cavity 18. As in the idle mode, the diaphragm 16 is affected by a pressure differential in the diaphragm and subdiaphragm cavities 18 and 19, respectively, the rigidity of the spring 43 is selected such that the channel is closed 10 the needle 17. As a result, gas fuel flows through the radial openings 39 into additional diffuser 9, where mixing with the air flowing through the opening 41, forms a lean combustible mixture entering the engine. When switching to load modes, i.e., when opening the throttle valve 6 and increasing the frequency of rotation of the crankshaft, the electrical control circuit of the electric drive 12 opens. However, the current supply to the solenoid valve 14 does not stop as the contacts of the sensor 44 of the throttle position 6 are closed and the combustible mixture enters the engine. When the engine is operating at forced idling, when throttle valve 6 is closed, the sensor 45, due to the high rotational speed of the crankshaft, interrupting the rotational speed of the crankshaft at idling, opens and interrupts the flow of current to the winding of the solenoid valve 14, since the position sensor 44 Throttle 6 is also open. In connection with this, the spool 29 by means of the spring 30 closes the opening 23 of the pipe 26 and connects the diaphragm cavity 19 of the Krfan 11 to the atmosphere through the pipe 28 and the opening 24. The needle 17 closes the access to the gas, as the vacuum in the inlet pipe causes the diaphragm 16 lift overcoming the force of the spring 43 and the gas supply at the forced idling modes is stopped. In these modes through the hole 41 enters louder, reducing the vacuum in the intake manifold. When the crankshaft rotation frequency decreases to a certain value (1200-1300 min), the rotation speed sensor 45 closes the control circuit of the solenoid valve 14 and thus the current. entering, into the winding 22, causes the spool 29 to lower and bind the throttle space 13 to the subdiaphragm cavity 19 of the valve 11. When the ignition is switched on, it stops iii .J.u .. v. m.-, m.j, -v. . With the supply of current to the winding 22 of the solenoid valve 14 and the needle 17 of the valve And is lowered to the lower position due to the force of the spring 43, thereby closing the gas supply to the engine. Air supply at the forced idling when shutting off the fuel supply reduces the vacuum in the intake manifold, which significantly reduces the consumption of engine oil. The additional air supply supplied to the engine during operation at the forced idling conditions has a positive effect on the subsequent acceleration of the engine, since the engine cylinders are cleaned and the engine response is improved. This is due to the fact that the volume of the main metering system is filled with gas and when the throttle valve 6 is opened, the gas immediately enters the mixing chamber 7 of the carburetor-mixer 4. Such a constructive implementation of the power supply system reduces the toxicity of exhaust gases and increases fuel efficiency.

Claims (3)

1. GAS ENGINE POWER SUPPLY SYSTEM RANIA, containing a gas cylinder, a gas reducer-evaporator with first and second stages connected to it, a carburetor-mixer with a diffuser, a throttle, an idle system and a mixing chamber, characterized in that, in order to increase fuel economy and reduce exhaust toxicity gases in active and forced idle modes, connected by an additional diffuser located under the throttle valve. a channel connected to the second stage with a valve having an electromagnetic drive and connected Figure 1 with throttle, crankshaft, throttle space and atmosphere. 2. The system by π. 1, characterized in that the valve is made in the form of a spring-loaded diaphragm and a needle mounted in the housing, mounted on the latter, the supra-diaphragm cavity being connected to the channel. 3. The system according to π. 1, characterized in that the electromagnetic actuator comprises a housing with a winding and three holes and a spool with belts located in it, one of the holes being connected with the throttling space, the second with the sub-diaphragm valve cavity, and the third with the atmosphere.