KR19990026275A - Valve control device of diesel fuel filter - Google Patents

Abstract

The present invention relates to a method for reducing diesel particulate matter, comprising: a first connector connected with a plurality of signal lines (16, 17) from an electronic controller (1), and a power line (18) connected from a vehicle battery (2); 10, the plurality of ground lines 19 and 20 are connected to the grounded ground terminal 3, and one power saving line 21 is connected to the second connector 11 connected to the open power saving terminal 4; A third connector 12 having valve signal lines 13 and 14 connected to a plurality of solenoid valves 7 and 8 serving as trap valves and a valve power line 15 connected to one solenoid valve 9 serving as an exhaust valve. And a switching means 30 for selectively connecting the first connector 10 or the second connector 11 to the third connector 12 so as to overload the engine due to a failure of the electronic controller. To prevent the ceramic filter medium from being broken.

Description

Valve control device of diesel fuel filter

The present invention relates to a diesel particulate filter, and more particularly to the opening and closing of the valve in the event of a complete failure of an electronic control unit (ECU) which electronically controls a ceramic coated filter medium or a valve of the ceramic filter medium. The invention relates to a valve control device for diesel particulate filter for protecting the engine of the vehicle and damage of the ceramic filter material.

The technology to effectively remove diesel fuel is divided into fuel improvement, engine improvement and aftertreatment technology.

Fuel improvement technologies include the use of diesel fuels of low sulfur content as a raw material for diesel vehicles, and alternative fuels such as compressed natural gas (CNG), methanol, and mixed use of compressed natural gas and diesel fuel.

In addition, the method for improving the engine can generate a swirl in the combustion chamber to promote the mixing of fuel and air to obtain complete combustion, and the method for improving the combustion chamber used for reducing hydrocarbons and smoke, high pressure injection and fuel injection amount and injection timing. How to improve fuel system such as electronic control, Turbo charger-Intercooler method used for complete combustion and output improvement as well as reduction of smoke by supplying sufficient air to combustion chamber and lowering intake air temperature, and inert exhaust Emission gas recycling (EGR), which lowers the maximum temperature in the combustion chamber by mixing gas with intake air, is used.

In addition, the post-treatment technology refers to a technology that is installed at the rear end of a diesel engine to collect particulate matter such as smoke in the exhaust gas discharged from the engine by using a filter material, and then forcibly burns it off using an electric heater or burner. As the filter medium, a ceramic filter, a ceramic fiber cartridge, a ceramic foam, and the like are used. As a regeneration technology, a catalyst, an electric heater, a diesel burner, an additive, and a throttling are used.

In such diesel fuel removal technology, the method of improving fuel can expect a significant reduction in emission concentration, but there are problems such as safety, economy and power, so it is not easy to commercialize with current technology, and engine improvement method is engine performance. It has been pointed out that the effect of removing soot is insignificant since it is mainly focused on improving the quality of smoke. On the contrary, the diesel soot removal method using ceramic filter media in the aftertreatment technology has been actively studied and applied globally due to its high filtration efficiency (more than 90% of soot removal) and ease of application.

Therefore, the high filtration efficiency of the post-treatment technique is achieved by the ceramic filter media, but the effective control of the removal of particulate matter accumulated in the filter media is essential for the correct operation of the regeneration apparatus and the valve by the accurate judgment of the electronic controller. In particular, when an excessive amount of diesel particulate matter accumulates on the filter medium due to incorrect control of the valve due to an abnormality or failure of the electronic control device, clogging and breakage of the filter medium due to excessive accumulation may occur. If the exhaust gas valve normally closed during operation of the filter device (in this case, the exhaust gas purged through the filter medium) is not opened, there is a problem that the engine system of the vehicle may be seriously damaged by the overload of the engine. .

The present invention has been made to solve the above problems, to protect the vehicle engine from over-accumulation or overload of ceramic filter media that may cause abnormality or failure in the electronic control device performing the logical control of the diesel particulate filter. It is an object to provide a valve control device for a diesel particulate filter.

1 is a connection diagram of a valve control device for preventing damage to a ceramic filter medium and protecting a vehicle engine in case of failure of the electronic control device of a diesel particulate filter according to the present invention;

* Explanation of symbols for main parts of the drawings

1: Electronic control unit (ECU) 2: Vehicle battery

3: earthing terminal 4: power saving terminal

7-9: Solenoid Valve 10-12: Connector

13, 14: valve signal line 15: valve power line

16, 17: signal line 18: power line

19, 20: ground line 21: power saving line

30: switching means

In order to achieve the above object, the present invention provides a diesel particulate filter, comprising a first connector connected to a plurality of signal lines from an electronic controller, a power line connected to a power line from a vehicle battery, and a plurality of ground lines connected to each other. A third connector connected to the ground terminal, one power saving line connected to an open power saving terminal, a valve signal line connected to a plurality of solenoid valves that are trap valves, and a valve power line connected to a solenoid valve that is an exhaust valve It can be achieved by providing a valve control device for diesel diesel fuel filter comprising a connector and switching means for selectively connecting the first connector or the second connector to the third connector.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 is a connection diagram of a valve control device for preventing damage to a ceramic filter medium and protecting a vehicle engine in case of failure of an electronic control device of a diesel particulate filter according to the present invention.

In the first connector 10, an electronic controller 1 and a vehicle battery 2 are respectively connected to one end, and a switching means 30 is connected to one end of the first connector 10. That is, the plurality of signal lines 16 and 17 output from the electronic controller 1 are connected to the first connector 10, and the power line 18 is connected to the vehicle battery 2.

The second connector 11 is connected to the ground terminal 3 and the power saving terminal 4 at one end thereof, and the switching means 30 is connected to the opposite end thereof. That is, the ground terminal 3 is connected to the second connector 11 through a plurality of ground lines 19 and 20, and the power saving terminal 4 is connected to the power saving line 21.

The third connector 12 is connected to the first and second solenoid valves 7 and 8, which are trap valves composed of ceramic filter media, and the third solenoid valve 9, which is an exhaust valve, respectively. Connected to the means 30.

One end of the first to third connectors 10-12 opposite to each other is connected to the switching means 30, respectively.

The switching means 30 is a state that is selectively switched, the first to third connectors 10-12 are connected. That is, terminals 31a-33a are connected to the first connector 10, terminals 31b-33b are connected to the second connector 11, and switches 31-33 are connected to the third connector 12. Connected. Such switching means 30 can be artificially switched state, it can be automatically switched by an electrical signal. That is, the operator manually switches the state of the switching means 30 to connect the first connector 10 and the third connector 12 or the second connector 11 and the third connector 12. In addition, without the operator manually switching, the electronic controller detects the state of the first and second solenoid valves (trap valves) and the third solenoid valves (exhaust valves) with separate sensors, and the electronic controller directly controls the signals. By outputting it can automatically switch the state of the switching means (30).

The switching means 30 is divided into a normal state in which the first connector 10 and the third connector 12 are connected, and an abnormal state in which the second connector 11 and the third connector 12 are connected. The first to third connectors 10-12 and the switching means 30 may be configured by applying a vehicle connector and a switching element.

The operation of the present invention configured as described above will be described in detail.

The valve control device of the diesel particulate filter of the present invention is to close the valve to the ceramic filter medium when the built-in electronic control device (1) has an abnormality or failure, it is possible to open a conventional valve for exhaust gas, When applied to a diesel particulate filter with two traps that alternately repeat regeneration, it works as follows. First, there are first and second solenoid valves for controlling the valves of the respective traps, and one third solenoid valve for opening the exhaust gas valve in the event of failure of the electronic control apparatus 1. Each solenoid valve 7-9 has both terminals, one of which receives an electric signal sent from an electronic controller, and the other of which is supplied with power from the battery 2 of the vehicle. The solenoid valve 7-9 is operated by the potential difference between the signal current of the supplied electronic control device and the power supply current from the battery 2. When the solenoid valve 7-9 has a previous position and current flows, If the valve is closed and there is no potential difference and no current flows, the valve opens.

When the diesel soot filtering device operates normally, the first and second solenoid valves 7 and 8 on the trap side repeatedly open and close to filter the soot, and the third solenoid valve 9 on the valve side to discharge the exhaust gas Although closed, the solenoid valve 7-9 cannot be adjusted when the first and second solenoid valves 7 and 8 and the third solenoid valve 9 on the trap side and the exhaust valve side cannot be adjusted in case of failure of the electronic control apparatus 1. ), The battery 2 and the electronic control device 1 is connected to the switching means (30).

That is, when the diesel particulate filter is operating normally, the first to third switches 31 to 33 of the switching means 30 are connected to the terminals 31a to 33a of the first connector 10, respectively. It is connected to the electronic controller 1 and the battery 2 through the signal lines 16 and 17 and the power supply line 18 of the first connector 10, respectively. At this time, the electronic controller 1 can control the first to third solenoid valves 7-9 so that the trap valve and the exhaust valve can be easily controlled.

However, when the electronic controller 1 fails to operate normally due to a failure or the like, the first to third switches 31 to 33 of the switching means 30 are switched. When the switching means 30 is switched, the first connector 10 which is connected to the third connector 12 is opened, and the second connector 11 is connected to the third connector 12. In this case, the switching of the switching means 30 may be manually controlled by the operator or may automatically switch the switching means 30 through a separate electronic control device or a control circuit. When each switch of the switching means 30 is switched, the first to third solenoid valves 7-9 are switched to the third connector 12 via the valve signal lines 13 and 14 and the valve power supply line 15. It is connected via the terminals 31b-33b on the second connector 11 side of the first to third switches 31-33 of the means 30. At this time, the first and second switches 31 and 32 are connected to the ground terminal 3 through the ground lines 19 and 20 so that the current continues to flow to the first and second solenoid valves on the trap valve side. 7 and 8 are closed, and since the third switch 33 is connected to the power saving terminal 4 through the power saving line 21, the current is cut off and the third solenoid valve 9 is opened.

Therefore, it is possible to prevent the damage of the ceramic filter medium provided on the trap side due to the overload of the vehicle engine. That is, the exhaust gas discharged from the engine is exhausted through the third solenoid valve 9.

As described above, the apparatus for controlling the valve of the diesel particulate filter of the present invention is connected to the electronic control device, the battery, the trap valve and the exhaust valve through the switching means or cut off the filtration device due to the failure of the electronic control device, respectively. In the case of not being able to control normally, the switching of the switching means prevents the engine from being overloaded, and prevents the ceramic filter material from being damaged in advance, thereby extending the life of the filtration device as much as possible.

Claims (6)

In diesel diesel particulate filter, A first connector to which a plurality of signal lines are connected from the electronic controller, and a power line to each of the vehicle batteries; A plurality of ground lines are connected to a grounded ground terminal, and one power saving line is connected to an open power saving terminal; A valve signal line is connected to a plurality of solenoid valves, which are trap valves, and a third connector to which a valve power line is connected to the solenoid valve, which is an exhaust valve, And a switching means for selectively connecting the first connector or the second connector to the third connector. 2. The valve control device for diesel diesel particulate filter according to claim 1, wherein the trap valve is closed and the exhaust valve is opened in a failure or abnormal state of the electronic control device. The valve control apparatus of claim 1, wherein the opening and closing of the plurality of solenoid valves is selectively connected to a ground terminal or a power saving terminal. 2. The valve control apparatus for diesel diesel particulate filter according to claim 1, wherein a vehicle connector and a switching element are applied to the first to third connectors and the switching means. The valve control apparatus of a diesel diesel particulate filter according to claim 1, wherein said switching means is a switch for artificially switching states. The valve control apparatus of claim 1, wherein the switching means is a switch for automatically switching a state by an electronic control apparatus.