KR19990035152A - Engine Exhaust Gas Reduction System - Google Patents

Abstract

The present invention relates to an exhaust gas reduction system of an engine for reducing nitrogen oxides generated in an engine. The present invention includes at least one pair of first and second nitrogen adsorbers 20 and 21 having a nitrogen adsorbent therein, and the pair Air tank 40 storing compressed air by the compressor 30 at each inlet of the nitrogen adsorber 20 and 21 and nitrogen adsorber 20 and 21 at each inlet of the nitrogen adsorber 20 and 21. Connect the vacuum pump 50 for extracting the nitrogen adsorbed in each, and between the air tank 40 and each nitrogen adsorber (20, 21) is provided with a solenoid valve (a, c) for air control, respectively, Vacuum control solenoid valves (e, f) are provided between the nitrogen adsorber (20, 21) and the vacuum pump (50), respectively, and oxygen control solenoid valves (b, d) is installed, and the solenoid valves a to d are flown by the controller 60. Characterized in that configured to control the opening and closing sequentially.

Description

Engine Exhaust Gas Reduction System

The present invention relates to an exhaust gas reduction system of an engine for reducing nitrogen oxides generated in an engine.

In general, an engine is a device that obtains driving power by converting energy generated by burning fuel at high temperature and high pressure into rotational power. However, for example, gasoline, kerosene, and natural compressed gas used as fuels are mixed with air to make a mixer, and unburned gas and harmful exhaust gas are generated in the process of burning the mixer.

Conventionally, unburned gas generated in an engine is returned to the intake system through an exhaust gas recirculation system and recombusted. Hazardous exhaust gas has a method of reducing exhaust gas by using a catalyst material as a reducing device in the exhaust system. .

By the way, the gas which occupies the most amount out of exhaust gas CO, HC, NOx, SOx is nitrogen oxide (NOx) and occupies the largest part of environmental pollution.

Therefore, the present invention was devised in view of the above circumstances, and the engine is capable of reducing nitrogen oxides and improving engine efficiency by exhausting nitrogen in the air and extracting oxygen and supplying it to the intake pipe of the engine. The purpose is to provide an exhaust gas reduction system.

Specific means of the present invention for achieving the above object, the air tank having at least a pair of nitrogen adsorber having a nitrogen adsorbent therein, and stores the air compressed by the compressor at each inlet of the pair of nitrogen adsorber And a vacuum pump for extracting nitrogen adsorbed to the nitrogen adsorber, respectively, and an air control solenoid valve is installed between the air tank and each nitrogen adsorber, and a vacuum control solenoid is provided between the nitrogen adsorber and the vacuum pump. Each valve is installed, and an oxygen control solenoid valve is installed at each outlet of the nitrogen adsorber, and the solenoid valves are configured to open and close the flow path sequentially by a controller.

According to the above means, by controlling each solenoid valve by the controller, oxygen is separated from the first and second nitrogen adsorbers and continuously supplied to the fuel system of the engine, thereby significantly reducing harmful nitrogen oxides. have.

1 is a block diagram of an exhaust gas reduction system according to an embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

20, 21: nitrogen adsorber 30: compressor

40: air tank 50: vacuum pump

60; Controller 100: Flow Meter

110: oxygen analyzer

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

As shown in FIG. 1, at least one pair of nitrogen adsorbers 20 and 21 having a nitrogen adsorbent therein is provided, and a compressor 30 is provided at each inlet of the pair of first and second nitrogen adsorbers 20 and 21. An air tank 40 storing compressed air and a vacuum pump 50 for extracting nitrogen adsorbed from the nitrogen adsorber 20 and 21 to each inlet of the nitrogen adsorber 20 and 21 and discharging them into the atmosphere Connected respectively, between the air tank 40 and each nitrogen adsorber (20, 21) is provided with an air control solenoid valve (a, c), respectively, the nitrogen adsorber (20, 21) and the vacuum pump (50) Between the vacuum control solenoid valves (e, f) are provided respectively, oxygen control solenoid valves (b, d) are provided at each outlet of the nitrogen adsorber (20, 21), the solenoid valves (a to d) These controllers 60 are configured to control the opening and closing of the flow path sequentially.

At this time, the oxygen analyzer 110 sets the time for the analysis controller 60 to control the respective solenoid valves a to f of the oxygen discharged from the nitrogen adsorber 20 or 21.

That is, when the oxygen concentration detected by the oxygen analyzer 110 is smaller than the set value, the opening and closing time of the solenoid valves a to f described later is shortened. On the contrary, when the oxygen concentration is larger than the set value, the solenoid valve a The opening and closing time of ~ f) becomes long.

Reference numeral 100 is a flow meter.

The operation of this embodiment configured as described above will be described.

First, when the system of the present invention is driven, the compressor 30 sucks outside air to fill the compressed air with the air tank 40, and at the same time, negative pressure is generated on the suction side of the vacuum pump 50, and all solenoid valves (a ~ f) is closed.

In this state, as the solenoid valve is combined and opened by the controller 60, only oxygen separated from the first nitrogen adsorber 20 or the second nitrogen adsorber 21 is supplied to the intake pipe of the engine.

First, when the solenoid valves a and b are opened (the remaining solenoid valves c, d, e and f are closed), the compressed air in the air tank 40 passes through the first nitrogen adsorber 20. In this case, in the adsorber 20, nitrogen is adsorbed by the nitrogen adsorbent and is supplied to the intake pipe of the engine through the oxygen analyzer 110 through the solenoid valve b opened only with separated oxygen.

After a certain time, the solenoid valve (a, b) is closed (nitrogen adsorption stop by the first nitrogen adsorber) and the solenoid valve (c, d) is opened, at the same time the solenoid valve (e) is opened.

Therefore, the compressed air in the air tank 40 passes through the second nitrogen adsorber 21, and at this time, the solenoid valve d in which nitrogen contained in the air is adsorbed by the nitrogen adsorbent in the nitrogen adsorber 21 and only oxygen is opened. It is supplied to the engine intake cylinder.

On the other hand, the nitrogen in the first nitrogen adsorber 20 is sucked by the vacuum pump 50 by the opening of the solenoid valve (e) is discharged to the atmosphere.

After a certain time, the solenoid valve (c, d) opened is closed (nitrogen adsorption stop of the second nitrogen intake), the solenoid valves (a, b) are opened, and at the same time the solenoid valve (e) is closed and the solenoid valve (f) Will be opened.

Therefore, the compressed air of the air tank 40 is supplied to the first nitrogen adsorber 20, and oxygen separated at the same time as nitrogen adsorption in the nitrogen adsorber 20 is supplied to the intake pipe of the engine.

On the other hand, the nitrogen in the second nitrogen adsorber 21 in which the nitrogen adsorption action is stopped due to the opening of the solenoid valve f is discharged to the atmosphere by the suction force of the vacuum pump 50.

As such, the solenoid valves a to f are controlled by the controller 60 to continuously separate oxygen from the first and second nitrogen adsorbers 20 and 21 and selectively supply the oxygen to the fuel system of the engine. In addition to improving engine power, nitrogen oxides can be significantly reduced.

In the above embodiment, a pair of nitrogen adsorbers are used, but the present invention is not limited thereto, and a plurality of nitrogen adsorbers may be used depending on the capacity of the nitrogen adsorber.

As described above, according to the present invention, the air sucked from the outside air is separated by nitrogen adsorber and the oxygen is extracted and supplied to the intake pipe of the engine, thereby greatly improving the output of the engine and reducing the nitrogen oxides. Can be.

Claims (1)

At least one pair of first and second nitrogen adsorbers 20 and 21 having a nitrogen adsorbent therein and storing the compressed air by the compressor 30 at each inlet of the pair of nitrogen adsorbers 20 and 21. The air tank 40 and each inlet of the nitrogen adsorber 20, 21 are connected to a vacuum pump 50 for extracting nitrogen adsorbed from the nitrogen adsorber 20, 21, respectively, and the air tank 40 ) And air control solenoid valves (a, c) are installed between the nitrogen adsorbers (20, 21), respectively, and the vacuum control solenoid valve (e) between the nitrogen adsorbers (20, 21) and the vacuum pump (50). and f) are respectively installed, and oxygen control solenoid valves b and d are installed at respective outlets of the nitrogen adsorber 20 and 21, and the solenoid valves a to d are connected to the flow path by the controller 60. Exhaust gas reduction system for an engine, characterized in that configured to open and close sequentially control.