KR19990036245U - Fuel mixing ratio control device of car - Google Patents

Abstract

The present invention relates to a device for saving fuel consumed when driving a vehicle, and more specifically, to control the ratio of air mixed with fuel when the engine speed is greater than a predetermined engine speed to improve the explosive power with the same amount of fuel and unnecessary The present invention relates to a fuel mixture ratio control device for an automobile, which is conducive to energy saving by reducing wasted fuel.

The fuel mixing ratio control apparatus for a vehicle of the present invention includes: a first air cleaner hose 20 connected to an air cleaner 2 to move air; A solenoid valve 22 coupled to one end of the air cleaner hose 20 to control an air movement state; A second air cleaner hose (21) connected to the solenoid valve (22) for introducing air conveyed into the surge tank (8); A vortex generator 23 installed through the surge tank 8 and making the air introduced from the second air cleaner hose 21 into a vortex; And a power control unit 24 which senses the rotational speed input from the ignition coil (-) as on / off control of the solenoid valve 22 and operates the solenoid valve 22 when the detected rotational speed is equal to or greater than a predetermined rotational speed. It is configured to supply air to the surge tank (8) through the throttle valve (6) and at the same time the air from the air cleaner (2) through the surge tank (8, 21) through the surge tank (8) It is characterized by flowing in).

Description

Fuel mixing ratio control device of car

The present invention relates to a device for saving fuel consumed when driving a vehicle, and more specifically, to control the ratio of air mixed with fuel when the engine speed is greater than a predetermined engine speed to improve the explosive power with the same amount of fuel and unnecessary The present invention relates to a fuel mixture ratio control device for an automobile, which is conducive to energy saving by reducing wasted fuel.

There has been a problem that fuel is unnecessarily wasted due to road conditions when driving a car. In particular, the petroleum fuel imported from all oil producing countries has an enormous effect on the growth of Korea's foreign debt, and CO, NO _X, etc., which are unnecessarily emitted due to excessive fuel consumption in automobiles, are considered as the main causes of air pollution. In the past, many studies have been conducted to reduce fuel consumption and improve fuel efficiency.

However, most of them focus on removing contaminants in the exhaust gas generated after the engine is consumed, and little research has been conducted to control the fuel and air mixing ratio to an appropriate level. In particular, in the conventional vehicle, when the exhaust gas concentration test is performed by injecting more fuel into the engine than the theoretical performance ratio, the CO and HC are high when the engine is intentionally designed to increase the output of the engine during acceleration or driving at a high speed.

1 illustrates an operation state as an embodiment of an air supply device used in a conventional vehicle. The air flowing from the outside is moved to the throttle valve 6 through the air cleaner hose 4 after dust, foreign matters, etc. are removed from the air cleaner 2. The throttle valve 6 is operated by the control signal from the automobile ECU 12 so that the amount of air moved to the surge tank 8 is adjusted. The automobile ECU 12 detects a signal input from surrounding sensors (engine speed sensor, oxygen sensor, etc.) to adjust fuel injection and air intake accordingly. The oxygen sensor 14 detects the oxygen concentration contained in the exhaust gas, checks whether the air-fuel ratio is the theoretical performance ratio, and adjusts the air-fuel ratio. The mixed gas enters the intake through the distribution port 10.

The theoretical ratio is the weight ratio of air and fuel theoretically necessary for the fuel to be completely burned. The fuel used in the engine is a mixture of various hydrocarbons, and the specific air-fuel ratio varies according to the fuel. The theoretical air-fuel ratio of a car using a gasoline engine is 14.7: 1. However, there is a problem in that the concentration of pollutants in the exhaust gas is increased because the fuel efficiency is slightly controlled by changing the theoretical performance ratio in order to increase the engine power during actual driving state, that is, during acceleration or driving at high speed.

The present invention is devised to solve the above problems, the object of the present invention is to improve the output of the engine even under the same fuel supply, and also to reduce the smoke because the fuel is close to the combustion state To provide a fuel mixing ratio control device of.

Another object of the present invention is to provide a fuel mixing ratio control apparatus for an automobile in which air is supplied in a vortex form into the surge tank to improve mixing efficiency and improve combustion efficiency.

Fuel mixing ratio control device of the vehicle of the present invention for achieving the above object, in the vehicle to move the inside of the surge tank by adjusting the amount of air flowing through the air cleaner using a throttle valve, it is connected to the air cleaner A first air cleaner hose for moving air; A solenoid valve coupled to one end of the first air cleaner hose to control an air movement state; A second air cleaner hose connected to the solenoid valve to introduce air transferred into the surge tank; A vortex generating unit installed through the surge tank and vortexing air flowing from the second air cleaner hose; And a power control unit which senses the rotational speed input from the ignition coil as on / off control of the solenoid valve and operates the solenoid valve if the detected rotational speed is equal to or greater than a predetermined rotational speed generated during acceleration or high speed movement. At the same time as supplying air to the surge tank through the valve is characterized in that the air from the air cleaner to the surge tank through the first and second air cleaner hose.

1 is a schematic configuration diagram of an air supply apparatus of a conventional vehicle;

2 is a schematic configuration diagram of an air supply device in which a fuel mixing ratio control apparatus for a vehicle according to the present invention is installed;

3 is a block diagram showing a configuration of a power control unit of the present invention;

4 is a flowchart illustrating an operating state of a fuel mixing ratio control apparatus for a vehicle of the present invention;

5 is a side cross-sectional view showing the structure of the vortex generator.

* Description of the symbols for the main parts of the drawings *

2: air cleaner, 4: air cleaner hose,

6: throttle valve, 8: surge tank,

10: splitter, 12: ECU,

14: oxygen sensor, 20, 21: the first and second air cleaner hose,

22: solenoid valve, 23: vortex generator,

24: power control unit, 232: wing,

242: relay, 244: power transistor,

246: Micom.

Hereinafter, with reference to the accompanying drawings will be described in detail the fuel mixing ratio control device of the vehicle of the present invention.

The present invention improves the output by adjusting the air mixture state, which is controlled slightly thicker than the theoretical performance ratio during acceleration or high speed driving in a conventional vehicle, to improve output and further reduce unnecessary smoke. It is to help.

2 is a configuration diagram of an air supply device in which a fuel mixing ratio control apparatus for a vehicle according to the present invention is installed. As shown, a first air cleaner hose 20 separate from the air cleaner hose 4 for supplying air to the surge tank 8 to the air cleaner 2 for supplying clean air is connected. Therefore, branched from the air cleaner 2, the air is supplied. However, the actual air inflow into the surge tank 8 is limited according to the rotation speed. In other words, the present invention is configured to supply more air only when the engine speed is detected at 1800 RPM or more.

A second air cleaner hose 21 directly connected to the surge tank 8 is connected to the first air cleaner hose 20, and a solenoid valve 22 for controlling air movement is installed therebetween. The solenoid valve 22 has a pipe is installed at the end and a blocking plate that is rotated by a motor to open and close the pipe inner passage. This works essentially the same as the throttle valve 4. First and second air cleaner hoses 20 and 21 are connected to both ends of the pipe, respectively. In addition, a vortex generator 23 is provided through the surge tank 8 to increase the mixing efficiency of air and fuel discharged from the second air cleaner 21.

Figure 5 is a cross-sectional view showing an embodiment of the vortex generator 23 according to the present invention, a plurality of wings 232 are fixed to the inside of the vortex generator 23 by a freely rotatable rotating shaft. Therefore, the air discharged into the surge tank 8 becomes a vortex while the wing 232 rotates due to the pressure of the air moving from the air cleaner 2 through the second air cleaner hose 21. By doing so, the mixing rate is increased and the combustion efficiency is also improved when mixing with the fuel.

The solenoid valve 22 is controlled on / off (open / closed) by the power control unit 24. The power control unit 24 receives a signal from the outside in order to detect the rotational speed and operates the solenoid valve 22 when it reaches a predetermined rotational speed or more. When the solenoid valve 22 is operated to open the pipe, air moves from the air cleaner 2 and flows into the surge tank 8. At this time, air flows into the surge tank 8 by the throttle valve 6 controlled by the vehicle ECU 12 as the vehicle is in an acceleration or high speed driving state (state of rotation speed or more set by the designer). Therefore, it can be seen that the amount of air flowing into the surge tank 8 increases in a particular driving state.

The amount of air flowing through the solenoid valve 22 is a value that can be set at the time of design and is adjusted to be completely burned, which can be determined by adjusting the diameters of the first and second air cleaner hoses 20 and 21. In the Sonata II model of the present invention to which the present invention is actually applied, by using the diameter of the air cleaner hoses 20 and 21 at 10 tons with the engine rotation speed of 1800 RPM or more, the engine output and the smoke reduction were obtained.

It is apparent to those skilled in the art that the adjustment of the air amount can be adjusted by measuring the oxygen concentration through the oxygen sensor 14. The rotation speed may be determined by the designer at an appropriate value according to the vehicle, for example, at an acceleration or medium speed in the range of 1500 to 2000 RPM.

Referring to FIG. 3, the power control unit 24 for controlling the solenoid valve 22 on / off may include a relay 242 for operating a motor of the solenoid valve 22 and a power supply for the relay 242. The power transistor 244 and the microcomputer 246 that receive the engine speed signal, compare the magnitude with the set speed, and output a control signal to the power transistor 244 when the magnitude is greater than the set speed.

The engine speed signal input to the microcomputer 246 may be input from, for example, (-) of the ignition coil. The engine speed signal is input in the form of a pulse wave. The microcomputer 246 may measure the engine speed by counting an input pulse per unit time. Of course, those skilled in the art to which the present invention pertains will readily appreciate that the power control unit 24 can be configured by changing the circuit of the power control unit 24 in the same purpose.

An operating state of the fuel mixing ratio control apparatus for a vehicle of the present invention having the above configuration will be described with reference to the flowchart of FIG. 4.

The engine speed is input to the power control unit 24 as the vehicle travels. The engine speed signal input to the microcomputer 246 of the power control unit 24 is a pulse signal, and the microcomputer 246 counts it and compares it with the preset rotational speed. As a result of comparing the rotation speed, if the input engine speed is greater than the set speed (1800 RPM), it is determined as the acceleration or medium speed driving state, and the microcomputer 246 sends a control signal to add the air supply amount to the surge tank 8. Output the solenoid valve 22 to open. At this time, the surge tank 8 is normally supplied with a predetermined amount of air suitable for the amount of fuel injected by the vehicle ECU 12.

Therefore, the surge tank 8 is supplied with a large amount of air, which is mixed with fuel that has been supplied in a conventional manner, is changed into a lean state, and vortices are generated to achieve complete combustion and combustion of the engine. The effect occurs.

As described above, according to the present invention, there is an advantage in conserving energy by controlling the air ratio mixed with the fuel at a predetermined engine speed or more, thereby improving explosive power with the same amount of fuel and reducing unnecessary waste of fuel. .

Although the present invention has been described in detail only with respect to the embodiments described, it will be apparent to those skilled in the art that the present invention may be modified or changed within the spirit and scope of the present invention. something to do.

Claims (2)

In an automobile in which the amount of air flowing through the air cleaner 2 is adjusted using the throttle valve 6 to move inside the surge tank 8, A first air cleaner hose 20 connected to the air cleaner 2 to move air; A solenoid valve 22 coupled to one end of the air cleaner hose 20 to control an air movement state; A second air cleaner hose (21) connected to the solenoid valve (22) for introducing air conveyed into the surge tank (8); A vortex generator 23 installed through the surge tank 8 and making the air introduced from the second air cleaner hose 21 into a vortex; And As the on / off control of the solenoid valve 22 detects the rotational speed input from the ignition coil (-), if the detected rotational speed is more than a predetermined rotational speed generated during acceleration or high speed movement, the solenoid valve 22 is operated. The solenoid valve 22 is turned on, and when the solenoid valve 22 is turned on, the air is supplied from the air cleaner 2 to the surge tank 8 through the throttle valve 6. Fuel mixing ratio control device for a vehicle, characterized in that the inflow into the surge tank (8) through the air cleaner hose (20, 21). The power control unit (24) of claim 1, wherein the power control unit (24) provides a relay (242) for operating the motor of the solenoid valve (22), a power transistor (244) for supplying power to the relay (242), and an engine speed signal. Fuel input ratio control device for a vehicle, characterized in that consisting of a microcomputer 246 for outputting a control signal to the power transistor 244 if the input speed is greater than the set speed by comparing with the set speed.