RU2145675C1 - Method for improving homogeneity of fuel mixture of carburetor engine operating under load - Google Patents

Abstract

FIELD: mechanical engineering; carburetor engines. SUBSTANCE: when engine crankshaft speed exceeds value defined by type of engine and carburetor, control unit generates at its outlet a low level signal with delay which is supplied to electropneumatic valve through which atmospheric pressure acts onto diaphragm with shutoff member. By shifting the latter relative to carburetor in direction of idling system outlet hole, hole is closed by shutoff member. Through progression system holes air is fed along air supply channel into above throttle space of carburetor primary mixing chamber. EFFECT: enhanced homogeneity of fuel mixture, reduced consumption of fuel. 2 dwg

Description

 1.2. The technical field to which the invention relates.

 The invention relates to the field of mechanics: motors and pumps.

 1.3. The prior art.

 The closest analogue of the claimed invention is an idle system with an economizer of forced idle (EPH) carburetor 2105-1107010 (Fig. 1), indicated in the literature [1], [2] and containing a carburetor housing of the idle system, in which the throttle space of the primary a mixing chamber in which a throttle valve is installed, connected to the engine control pedal and interacting with a microswitch, the emulsion channel of the idle system through the openings of the transition modes communicates with by the throttle space of the primary mixing chamber, and with the air supply channel through the idle system outlet, it communicates with the throttle space of the primary mixing chamber, in the diaphragm control cavity there is a diaphragm to which the locking element is rigidly attached, they can move relative to the carburetor body in the direction of the outlet idle system or in the direction of the adjusting screw for the amount of combustible mixture, one contact micro switch it is electrically connected to the positive power supply bus of the car, another contact is electrically connected to the electro-pneumatic valve, the control unit of the electro-pneumatic valve (hereinafter the control unit), when the engine speed is less than or greater than the value determined by the type of engine and carburetor, generates a high or low signal at its output level without delay, the input of the control unit is electrically connected to the signal source of the engine speed, the output is electrically connected to the electric when a high or low level signal is applied to it, it is able to communicate one or another of its inputs with its output, one input is connected via the pneumatic channel to the engine intake manifold, another input is connected to the atmosphere, the pneumatic channel output communicates with the diaphragm control cavity, when this is pressed on the engine control pedal, open the throttle valve of the primary mixing chamber, through which the combustible mixture is fed into the intake manifold of the engine, close the contacts of the microswitch through which the electro-pneumatic valve is controlled by a high-level signal, at a frequency of rotation of the engine crankshaft greater than the value determined by the type of engine and carburetor, a low-level signal is generated at the output of the control unit without delay, through the electro-pneumatic valve, the pressure of the intake manifold of the engine acts on the diaphragm with a shut-off element and hold them at the adjusting screw of the amount of the combustible mixture, through the outlet of the idle system to throttle Flax space of the primary mixing chamber is carried out feeding the emulsion entering by the emulsion channel idling and air flowing through the channel air inlet, through holes transients carried supply emulsion entering by the emulsion channel idling system, naddrosselnoe space of the primary mixing chamber of the carburettor.

 Under load conditions, the main flow of the combustible mixture entering through the primary mixing chamber of the carburetor into the engine presses the flow of the combustible mixture entering through the outlet of the idle system into the throttle space against the wall of the primary mixing chamber. This part of the combustible mixture flows down the wall of the primary mixing chamber in large drops, which worsens the uniformity of the composition of the combustible mixture entering the engine, resulting in increased fuel consumption, increased CO content in the exhaust gases.

The essential features of the closest analogue, which coincide with the essential features of the claimed invention:
press the engine control pedal, open the throttle valve of the primary mixing chamber, through which the fuel mixture is fed into the engine intake manifold, through the openings of the transitional modes, the emulsion is fed through the emulsion channel of the idle system to the throttle space of the carburetor primary mixing chamber.

 1.4. SUMMARY OF THE INVENTION

 The combustible mixture entering the engine, in which the liquid fuel is in a uniform vapor state, gives a minimum fuel consumption and the lowest CO content in the exhaust gases.

Under load conditions, in the primary mixing chamber of the carburetor, perpendicular to the main flow of the combustible mixture entering the engine, the flow of the combustible mixture through the outlet of the idling system enters the throttle space. This flow is pressed by the main flow of the combustible mixture to the wall of the primary mixing chamber, as a result, this part of the combustible mixture flows down the wall of the primary mixing chamber in large drops, which impairs the uniformity of the composition of the combustible mixture entering the engine. When eliminating the flow of the combustible mixture, under load conditions, flowing through the idle system outlet to the throttle space of the carburetor primary mixing chamber, while preserving all the adjustments and jets set by the manufacturer in the carburetor 2105-110701 (VAZ-21011 engine), we obtain the following technical results:
1) a decrease in fuel consumption when driving at a speed of 90 km / h by about 25%;
2) a decrease in the CO content in the exhaust gases at a engine speed of 2000 rpm approximately two times;
3) a decrease in fuel consumption when driving a car in the urban cycle by about 5%;
4) a decrease in the CO content in the exhaust gases when the car moves in the urban cycle by about 40-50%;
5) there is no need to use a micro switch.

 A method that improves the uniformity of the composition of the combustible mixture of the carburetor engine under load conditions, comprising the idle system carburetor body, in which the throttle space of the primary mixing chamber is located, in which the throttle connected to the engine control pedal, the emulsion channel of the idle system and the air supply channel are installed through the holes of the transition modes communicate with the over-throttle space of the primary mixing chamber, in the diaphragm control cavity is located the diaphragm to which the locking element is rigidly attached, they have the ability to move relative to the carburetor body in the direction of the idle system outlet or in the direction of the adjusting screw for the amount of combustible mixture, the control unit, when the engine speed is less than or greater than the value determined by the engine type and carburetor, generates a high-level signal without delay at its output, a low-level signal with a delay, the input of the control unit is electrically connected to the engine of the signal of the engine speed of the crankshaft, the output is electrically connected to the electro-pneumatic valve, the electro-pneumatic valve, when a high or low level signal is applied to it, is able to communicate one or the other of its input with its output, one input is connected via the pneumatic channel to the engine intake manifold, the other input is connected to atmosphere, the pneumatic channel output communicates with the diaphragm control cavity, while pressing the engine control pedal, open the throttle valve primary mixing chamber, through which the combustible mixture is fed into the intake manifold of the engine, at a frequency of rotation of the crankshaft of the engine greater than the value determined by the type of engine and carburetor, a low level signal is generated at the output of the control unit with a delay, which is applied to the electro-pneumatic valve through which atmospheric pressure acts to the diaphragm with a locking element, moving which relative to the carburetor body in the direction of the outlet of the idle system, close the locking element with it, through the openings of the transitional modes, supply the emulsion entering the emulsion channel of the idle system and the air entering the air supply channel to the throttle space of the carburetor primary mixing chamber - this set of essential features provides technical results in all cases indicated here .

 The essential features of the claimed invention, which differ from the essential features of the closest analogue: when the engine speed is greater than the value determined by the type of engine and carburetor, a low level signal is generated at the output of the control unit with a delay, which is applied to the electro-pneumatic valve through which atmospheric pressure acts on the diaphragm with a locking element, moving which relative to the carburetor body in the direction of the outlet of the idle system, locking element they close it, through the openings of the transitional modes, air is supplied through the air supply channel to the throttle space of the carburetor primary mixing chamber.

 1.5. The list of figures of drawings and verification data.

 In FIG. 1 shows the operation of the idling system with EPHH, the closest analogue, under load conditions. In FIG. 2 depicts the claimed operation of the idle system with EPHC under load conditions at a rotational speed of the engine crankshaft greater than the value determined by the type of engine and carburetor.

In FIG. Figure 3 shows the verification data for the CO content in the exhaust gases of a VAZ-21063 car with a carburetor 2105-1107010 before undergoing technical inspections, where:
1992-93 - the data of the exhaust gas test of the car for CO content without applying the claimed invention.

 1994-97 - the data of the exhaust gas test of the vehicle for CO content using the claimed invention.

 1.6. Information confirming the possibility of carrying out the invention.

 In FIG. 2 shows an idle system with an EPPC that implements a method for improving the uniformity of the composition of a combustible mixture of a carburetor engine under load conditions and comprising a carburetor body of an idle system in which a throttle space of the primary mixing chamber is installed, in which an throttle valve connected to the engine control pedal is installed, emulsion the idle system channel and the air supply channel through the openings of the transient modes communicate with the throttle space of the primary mixture of the camera, in the diaphragm control cavity there is a diaphragm to which the locking element is rigidly attached, they can move relative to the carburetor body in the direction of the idle system outlet or in the direction of the adjusting screw for the amount of combustible mixture, the control unit, at a rotational speed of the engine crankshaft less or more than the value determined by the type of engine and carburetor, generates a high level signal without delay at its output, a low level signal with The control input of the control unit is electrically connected to the source of the engine speed signal, the output is electrically connected to the electro-pneumatic valve, the electro-pneumatic valve, when a high or low level signal is applied to it, is able to communicate one or the other of its input with its output, one input is connected to the pneumatic channel with the engine intake manifold, the other input communicates with the atmosphere, the pneumatic channel output communicates with the diaphragm control cavity, while depressing the pedal control the engine, open the throttle valve of the primary mixing chamber, through which the combustible mixture is fed into the intake manifold of the engine, at a rotational speed of the engine crankshaft greater than the value determined by the type of engine and carburetor, a low level signal is generated at the output of the control unit with a delay, which is fed to the electropneumatic valve through which atmospheric pressure acts on the diaphragm with a locking element, moving them relative to the carburetor body in the direction of the outlet outlet Ia idling, its closure member is closed, through holes transients carried supplying emulsion of the emulsion entering the idle channel system, and the air entering the air inlet channel into the primary space naddrosselnoe carburetor mixing chamber.

 Consider the operation of the claimed invention in various modes. Idling: the engine speed is less than the value at which the control unit at its output generates a high level signal without delay, while the vacuum pressure from the engine intake manifold through the electropneumatic valve enters the diaphragm control cavity with a locking element attached to it, the system outlet idle open, the throttle valve of the primary mixing chamber of the carburetor is closed, the air entering the air supply channel, mixing with the emulsion, post falling through the emulsion channel of the idling system, brings the composition of the combustible mixture entering the engine through the outlet of the idling system to the optimum.

 Load modes: the engine speed depends on the position of the throttle, when the throttle is opened, the engine speed increases, and each time the engine speed exceeds the value determined by the type of engine and carburetor, for example, during acceleration of a car when changing gears, the control unit at its output each time will generate a low-level signal with a delay (for example, for 6-8 s), which is supplied to the electric non-valve, as a result, atmospheric pressure with a delay enters the diaphragm control cavity, the outlet of the idle system (with a delay) closes, the emulsion flowing through the emulsion channel of the idle system, mixes with the air flowing through the air supply channel, through the holes of the transition modes into the throttle space of the primary mixing chamber of the carburetor.

 Thus, under load conditions when the engine speed is higher than the value at which the output opening of the idle system is closed with some delay, we obtain at the engine inlet a combustible mixture of a more uniform composition that burns more fully and gives a lower CO content in the exhaust gases as confirmed by the verification data presented in FIG. 3. At the same time, the functions of the holes of the transient modes are preserved, the acceleration of the engine or an increase in the load proceeds smoothly without failures. Engine braking: releasing the engine control pedal, the throttle valve of the carburetor primary mixing chamber is closed, the gearbox is engaged, the clutch is closed. If at the moment of closing the throttle the engine speed was higher than the value at which the control unit generates a low level signal with a delay at its output, then the idle system outlet hole remains closed. In this mode, the engine brakes very efficiently and does not consume fuel, if you open the throttle, the main flow of the combustible mixture and the emulsion through the transition holes will begin to flow into the engine, with a decrease in the engine speed to the value at which the control unit exits generates a high-level signal without delay, rarefaction of the intake manifold through the electro-pneumatic valve enters the diaphragm control cavity, the outlet of the idle system opens and after driver running the system idle.

 Thus, the claimed invention improves the uniformity of the composition of the combustible mixture entering the engine under load conditions, preserves the functions of the transition holes, acceleration of the engine or increase in load proceeds smoothly, without failures, fuel is saved, the CO content in the exhaust gases is reduced, there is no need to use a micro switch.

Claims (1)

 A method that improves the uniformity of the composition of the combustible mixture of the carburetor engine under load conditions, comprising the idle system carburetor body, in which the throttle space of the primary mixing chamber is located, in which the throttle connected to the engine control pedal, the emulsion channel of the idle system and the air supply channel are installed through the holes of the transition modes communicate with the over-throttle space of the primary mixing chamber, in the diaphragm control cavity is located the diaphragm to which the locking element is rigidly attached, they can move relative to the carburetor body in the direction of the idle system outlet or in the direction of the adjusting screw for the amount of combustible mixture, the control unit at an engine speed of rotation is less than the value determined by the type of engine and carburetor, generates a high level signal at its output without delay, the input of the control unit is electrically connected to the source of the crankshaft speed signal the motor shaft, the output is electrically connected to the electro-pneumatic valve, the electro-pneumatic valve, when a high or low level signal is applied to it, has the ability to communicate one or the other of its input with its output, one pneumatic channel input communicates with the engine intake manifold, another input communicates with the atmosphere, the output the pneumatic channel communicates with the diaphragm control cavity, while pressing the engine control pedal, open the throttle valve of the primary mixing chamber, along which the mixture is fed into the intake manifold of the engine, through the openings of the transient modes, the emulsion is fed through the emulsion channel of the idle system into the throttle space of the primary mixing chamber, characterized in that the control unit at a speed of rotation of the crankshaft of the engine is greater than the value determined by the type of engine and carburetor , at its output generates a low level signal with a delay, while the engine speed is higher than the value determined by the type of the engine and the carburetor, at the output of the control unit they generate a low level signal with a delay, which is supplied to the electro-pneumatic valve through which atmospheric pressure acts on the diaphragm with a shutter element, moving them relative to the carburetor body in the direction of the idle system outlet, shut it with a shutter element, through Transient openings supply air entering the air supply channel to the throttle space of the carburetor primary mixing chamber Torah.

Images