KR970001119B1 - Car loading type adding fuel automatic supply device - Google Patents

Abstract

The automobile supplying device of a vehicle mountable additive for stable recycling in a harmful gas filtering manner in an exhaust gas reducing device of a Diesel automobile includes an additive tank(40) into which an additive are retained, a mixing tank(50) connected to the additive tank(40) and a fuel tank(10), respectively, a level switch(60) installed in the mixing tank(50) for sensing a water level, an interlocking type metering pump(80) to which electric power is applied by a low level of water sensing signal of the level switch(60), for discharging the Diesel oil and the additive to the mixing tank through supply lines(70,71) to mix them appropriately, and a fuel supply pump(20) for supplying the fuel of the mixing tank(50) to an injector(30).

Description

Vehicle-mounted additive supply automatic supply device for stable regeneration by soot filtration method among exhaust gas reducing devices of diesel vehicle

1 is a block diagram showing a fuel supply system in a conventional diesel vehicle.

2 is a view for explaining a fuel supply system in the diesel vehicle of the present invention.

3 is a circuit diagram showing a level switch for automatic water level control of the mixing tank of the present invention.

* Explanation of symbols for main parts of the drawings

10: fuel tank 20: fuel supply pump

30: injector 40: additive pump

50: mixed tank 60: level switch

70, 71: supply line 80: peristaltic metering pump

200: fuel supply line 203, 202: fuel supply valve

300: surplus fuel return line 301, 302: surplus fuel return valve

600: low level switch 601: high level switch

602: manual on switch 603: manual off switch

604, 605, 606 relay 607 float

608: check valve 700: line mixer

800: pump motor 801, 802: pump

The present invention relates to a vehicle-mounted additive automatic supply device for stable regeneration in a soot filtration method of the exhaust gas reduction device of a diesel vehicle, in particular, accumulated in the filter in the soot filtration method of the after-treatment device which is one of the exhaust gas reduction technology. In the process of burning particulate matter (soot) (hereinafter referred to as regeneration) in order to reduce the ignition temperature of the soot at a relatively high temperature, the diesel oil and additives are supplied at a constant mixing ratio between the fuel tank and the fuel supply pump. It relates to a vehicle-mounted additive automatic supply device.

In modern times, there is a growing interest in environmental pollution, and the air pollution caused by the exhaust gas of automobiles continues to increase as the number of vehicles increases. Recently, the rapid increase of domestic automobiles greatly deteriorates the urban air environment due to the large amount of pollutant emissions. I'm making it. The pollutants emitted by transportation means that diesel vehicles used for industrial purposes such as buses and trucks have more pollutants than gasoline vehicles, and the driving distance of vehicles is the main cause of air pollution. Violent discomfort, mental damage, and material damage caused by smoke (including soot) are causing a lot of harm to people's lives.

Therefore, many countries around the world are mandating the production of low-pollution vehicles by legally regulating the amount of harmful gas components of automobiles to reduce air pollution by vehicles as part of urban air quality improvement. Gas reduction technologies include large-scale alternative fuel use, engine improvement, intake improvement, and post-treatment devices. Especially, the soot filtration method of post-treatment devices has a very good effect of reducing smoke, while the level of foreign technology is in the early stage of industrialization. There is much room for development.

1 is a view showing a fuel supply system of a conventional diesel vehicle, a fuel tank 10 filled with diesel oil, a fuel supply pump 20 for pumping fuel of the fuel tank 10, and It is composed of an injection (30) is injected fuel injected from the fuel supply pump (20).

In such a conventional fuel supply system, the additives can be supplied manually by a manual blending agent according to the amount of diesel oil injected into the fuel tank 10, which is very cumbersome, and the additive is added to the fuel tank 10 up to 200 liters. The addition by hand requires not only additional equipment such as agitator operated by a separate motor but also could not exclude the separation of diesel oil and additives from the specific gravity difference. When the resumption of the additive is greater than the diesel oil, the additive is settled on the floor, and the fuel is supplied to the injection 30 through the fuel supply pump 20 without maintaining a constant mixing ratio. The fumes of diesel oil which do not exist and the fumes containing additives unevenly accumulate in the filter.

This not only causes incomplete regeneration during the regeneration of the smoke, but also causes the local regeneration of the regeneration in the filter to be soared, causing the filter to be damaged or damaged by thermal shock, thus reducing the efficiency of the soot and impairing the operation of the vehicle. There was this.

The present invention has been made in view of the above, and the fuel supply is installed to install the vehicle-mounted additive automatic supply device so that the diesel oil and the additive can be supplied to the injection via the fuel supply pump while maintaining a uniform mixing ratio It is to provide a system.

The object of the present invention described above is that power is applied by an additive tank, a mixing tank connected to the additive tank and a fuel tank, a level switch installed in the mixing tank to sense a water level, and a low water level detection signal of the level switch. It is achieved by a peristaltic metering pump that allows diesel oil and additives to be supplied to the mixing tank through a supply line, and a fuel supply pump for supplying fuel from the mixed tank to the injection.

BEST MODE Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the fuel supply system in which the fuel of the fuel tank 10 is supplied to the injection 30 by the fuel supply pump 20, the additive tank 40 containing the additive, the additive tank 40 and the fuel tank 10 Power supply is applied to the mixing tank 50 connected to the tank, the level switch 60 installed in the mixing tank 50 to sense the water level, and the low water level detection signal of the level switch 60. Interlocking metering pump (80) for discharging to have a proper ratio, the line mixer (700) for mixing the diesel oil pumped from the interlocking metering pump (80) and additives to the mixing tank (50), It is composed of a fuel supply pump 20 for supplying the fuel of the mixing tank 50 to the injection (30).

The peristaltic metering pump 80 may be operated by manual on / off switches 602 and 603.

The peristaltic metering pump 80 is a known one in which two pumps 801 and 802 are operated by one motor 800, and the discharge amounts of the two pumps 801 and 802 are different.

The peristaltic metering pump 80 can be manufactured to various specifications, for example, by connecting two pump heads having different discharge amounts to one motor 800 provided with two shafts, and thus to a constant rotational force of the motor 800. To discharge the diesel oil and the additive at a constant mixing ratio, or to adjust the discharge amount of the pump by varying the rotation ratio by installing a reduction gear on one of the two shafts of the motor 800, and the discharge amount on the two shafts of the motor 800. The other two pump heads are connected to each other, and a gear reducer is installed on one shaft. The pumps are simultaneously turned on and off by means of one control means. Mode of adjustment may be used.

The level switch 60 is turned on when the float 607 in the mixing tank 50 is in contact with the low level switch 600 as shown in FIGS. 2 and 3 to the interlocking metering pump 80. Drive relays 604 and 606 for applying power, and a shut-off relay 605 that is turned on when the float 607 is in contact with the high level switch 601 to cut off the power of the linked metering pump 80. It is composed.

The fuel supply lines 70 and 71 are connected to a line mixer 700 for mixing the diesel oil and the additives discharged by the interlocking metering pump 80 and are mixed through the line mixer 700. Fuel is introduced into the mixing tank 50 and used in the injection 30 through the fuel supply line 200 by the fuel supply pump 20, and the remaining surplus fuel is used in the mixing tank (through the fuel return line 300). Return to 50) and reuse.

The two lines 200 and 201 for supplying fuel to the engine are provided with valves 202 and 203, respectively, connected to the fuel tank 10 and the mixing tank 50, and two to which surplus fuel is returned. The return lines 300 and 301 are also provided with valves 302 and 303 and are connected to the fuel tank 10 and the mixing tank 50. In the event of a failure in the additive automatic supply system, the fuel may be replaced with the conventional fuel supply system. The valves 202 and 302 on the mixing tank 50 side are closed and the valves 203 and 303 on the fuel tank 10 side are opened in order to prevent the trouble from driving the vehicle by supplying the If only the diesel oil in the fuel tank 10 is supplied to the engine, the surplus fuel is to be returned to the fuel tank (10).

Of course, the exhaust gas (soot) at this time is bypassed as it is not collected in the filter of the soot filter, and the system is input so that it can be operated through the electronic control device of the vehicle.

The capacity of the mixing tank 50 is suitably 1-2L, the upper part of the mixing tank 50, the air intake and check to prevent the fuel outflow by the malfunction of the high level switch 801 The valve 608 is installed.

The action and effect of the present invention thus obtained are as follows.

The diesel vehicle is operated while diesel oil and additives are supplied to the fuel tank 10 and the additive tank 40, respectively, and the fuel of the mixing tank 50 is injected by the fuel supply pump 20 during operation. Is provided. Accordingly, when the water level in the mixing tank 50 is lowered and the float 607 comes down to come into contact with the low level switch 600, the low level switch 600 is turned on and driven by the drive relays 604 and 606. As the 80 is operated, diesel oil and additives of the fuel tank 10 and the additive tank 40 are discharged through the supply lines 70 and 71, and the discharged diesel oil and additives are discharged through the line mixer 700. The mixture is introduced into the mixing tank 50. At this time, since the capacities of the pumps 801 and 802 are different from each other, it is important that the diesel oil and the additive be mixed at a predetermined concentration according to the selection of the pumps 801 and 802. The fuel in the mixing tank 50 is continuously supplied to the injection 30 even while the additive is introduced, and the surplus fuel is returned.

When diesel oil and additives are mixed in the mixing tank 50 by the interlocking metering pump 80 and the water level becomes full, the float 700 floats and the high level switch 601 becomes a contact so that the high level switch 601 When on, the interlocking metering pump 80 interlocked by the shutoff relay 605 is stopped.

The fuel in the mixing tank 50 is an amount of additives that are mixed to have an appropriate concentration, and may be operated for about 2-5 minutes depending on the driving state of the vehicle. At this amount of fuel, the diesel oil and the additives are separated by the specific gravity difference. The concentration of the additive is supplied to the injection 30 in a constant state before it is. When the exhaust gas (soot) of the mixed fuel used at a constant concentration of additives accumulates in the filter of the soot filtration device, this means that the soot contains the additive uniformly, which is irregularly caused by conventional non-distillation. As the regeneration temperature generated during regeneration of the collected soot containing additives increases, the filter is prevented from being damaged from thermal shock and the regeneration is performed uniformly to increase the soot filtration efficiency and to maintain the performance of the soot filtration device. Means to give.

Claims (9)

In the fuel supply system in which the fuel of the fuel tank 10 is supplied to the injection 30 by the fuel supply pump 20, the additive tank 40 containing the additive, the additive tank 40 and the fuel tank 10 Power supply is applied to the mixing tank 50 connected to the mixing tank 50, the level switch 60 installed in the mixing tank 50 to sense the water level, and the low water level detection signal of the level switch 60, and thus the diesel oil and the additive. Interlocking metering pump 80 for discharging the mixing tank 50 through the supply lines 70 and 71 and the fuel for supplying the fuel of the mixing tank 50 to the injection 30 so as to have a proper ratio. An on-vehicle additive auto feeder for stable regeneration in a soot filtration system of an exhaust gas reducing device of a diesel vehicle including a supply pump (20). The exhaust gas of a diesel vehicle according to claim 1, wherein the linked metering pump (80) is formed by connecting two pump heads having different discharge amounts to one motor (800) provided with two shafts. Automatic vehicle-mounted additive supplying device for stable regeneration in soot filtration system among abatement devices. The exhaust gas of the diesel vehicle according to claim 1, wherein the linked metering pump (80) adjusts the discharge amount of the pump by varying the rotation ratio by installing a reduction gear on one of two shafts of the motor (800). Auto-mounting additive supplying system for stable installation in the soot filtration system among abatement devices. The diesel engine according to claim 1, wherein the linked metering pump (80) connects two pump heads having different discharge amounts to two shafts of the motor (800) and at the same time installs a reducer on one shaft. Vehicle-mounted additive automatic supply device for stable regeneration in the soot filtration method of automobile exhaust gas reduction device. The exhaust gas reduction apparatus of claim 1, wherein the peristaltic metering pump (80) is configured to control two motors and pumps by one control means. Vehicle-mounted additive auto feeding device for stable regeneration in filtration method. The level switch (60) according to claim 1, wherein the level switch (60) is driven when the float (607) in the mixing tank (50) is in contact with the low level switch (600) to drive power to the linked metering pump (80). Relay 604, 606, and when the float 607 is in contact with the high level switch 601 is characterized in that it is composed of a shut-off relay 605 to cut off the power of the linked metering pump 80 Vehicle-mounted additive automatic supply device for stable regeneration in soot filtration method of exhaust gas reduction device of diesel vehicle. According to claim 1, Two return lines (300) (301) and the return to the fuel tank (10) and the mixing tank 50 to supply the remaining fuel used in the engine injected from the injection 30 and the return, An on-vehicle additive auto feeder for stable regeneration in a soot filtration system of an exhaust gas reducing device of a diesel vehicle having valves 302 and 303 respectively installed in lines 300 and 301. According to claim 1, The emergency tank 201 connected to the fuel tank 10 is installed in the middle of the line 200 connecting the fuel supply pump 20 in the mixing tank 50, the line 200 And an emergency line (201), the valve 202 (203), characterized in that each of the exhaust gas reduction device of the diesel vehicle characterized in that the vehicle-mounted additive automatic supply device for stable regeneration in the soot filtration method. The exhaust gas of the diesel vehicle according to claim 1, wherein a line mixer 700 is installed between the peristaltic metering pump 80 and the mixing tank 50 to mix the pumped diesel oil and the additive. Automatic vehicle-mounted additive supplying device for stable regeneration in soot filtration system among abatement devices.