JPS6338330Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an electric particulate combustion device for an internal combustion engine, and more specifically, a ceramic particulate combustion device for removing particulate, mainly composed of carbon, contained in the exhaust gas of an internal combustion engine, especially a diesel engine. The present invention relates to an electric particulate waste combustion device for preventing clogging of a particulate waste collection filter.

Exhaust gas from diesel engines contains particulate matter (mainly carbon particles), which must be removed from the exhaust gas to prevent it from being released into the atmosphere.

In order to remove this particulate matter, a particulate matter collection filter made of ceramic or the like is conventionally provided in the middle of the exhaust pipe of an internal combustion engine. However, as we continue to collect particulate matter from exhaust gas, this filter gradually becomes clogged.
Exhaust gas pressure increases and fuel efficiency deteriorates.

Therefore, in conventional ceramic particulate matter collection filters, etc., in order to prevent the exhaust gas pressure from increasing in the exhaust pipe as the particulate matter collection progresses, the collected particulate matter is heated and combusted within the filter, and the filter is reused. I try to do that. As one of such heating and combustion means, there is a device in which the entire surface of a ceramic filter is plated with metal such as nickel, and the particulate is heated by applying electricity thereto to burn the particulate.

However, in order to burn particulate matter in a ceramic filter using such conventional means, the entire filter must be heated, which results in high power consumption and requires a large increase in battery capacity and circuit capacity, resulting in increased costs.

This idea was devised to eliminate the drawbacks of the conventional electric particulate combustor, and the particulate yulate, whose main component is carbon, burns once ignited without heating the entire filter. This was done with the focus on the fact that the fire gradually spreads to other parts. The purpose is to reduce the power consumption for burning particulate.

The electric particulate combustion device of this invention, which achieves the above-mentioned object, is characterized in that a ceramic particulate collection filter is installed in the exhaust pipe of an internal combustion engine, and metal plating layers are provided in a specified range from the exhaust inlet and exhaust outlet except for the center of the filter, and both of the plating layers are connected to a power source so that electricity is supplied when the metal plating layers are short-circuited by the collected particulate.

Embodiments of this invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram of an embodiment of the electric particulate combustion apparatus of this invention. In this invention, the exhaust gas G flowing out from the exhaust manifold 6 of the diesel engine 5 into the exhaust pipe 7 passes through a ceramic particulate matter collecting filter 1 installed in the middle of the exhaust pipe 7, and the particulate matter is removed by this filter 1. Afterwards, it passes through a silencer 8 and is emitted to the outside.

In this embodiment, the particulate waste collection filter 1 has a cylindrical shape, as shown in the perspective view of FIG. 2 and in FIG. The bottom wall 11 is formed by arranging the filters in a grid pattern and sealing both ends of the filters alternately in a staggered manner, and is generally referred to as a honeycomb type filter with a large surface area. Therefore, the exhaust gas G flowing through the exhaust pipe 7
The exhaust gas flows into the filter body 10 through the opening 13 provided at the exhaust inlet 12 of the filter 1, passes through the side wall 14 in the filter body 10, and flows out through the opening 16 of the exhaust outlet 15. The particulate matter inside is adsorbed to the side wall 14.

In this invention, the particulate matter collection filter 1 constructed as described above is coated with nickel, etc. in a predetermined range from the exhaust inlet section 12 and the exhaust outlet section 15 of the filter body 10 toward the central part 17 of the filter body, as shown in FIG. metal plating layers 18 and 19 are provided. Although the range in which the metal plating layers 18 and 19 are provided is not particularly limited, the metal plating layers 18 and 19 on both sides are not continuous in the filter body central portion 17, and no metal plating layer is provided in the filter body central portion 17. There must be a part.
The plating layers 18 and 19 are connected to a power source, such as a battery 25, through electrodes 21 and 22, as shown in FIG.

Therefore, in the electric particulate combustion apparatus of this invention configured as described above, the exhaust gas G
passes through the particulate matter collection filter 1,
As the putty cureate is collected and accumulated in the filter body 10, the metal plating layer 18,
The metal plating layers 18 and 19 are crosslinked by the putty ureate accumulated in the central portion 17 of the filter body where the filter body 19 is not provided.

Then, the metal plating layers 18 and 19 are short-circuited by the particulate material, which is mainly carbon, and the metal plating layers 18 and 19 are short-circuited through the electrodes 21 and 22.
19 and the particulate material itself in the crosslinked portion are energized and generate heat. As a result, the particulate matter ignites and burns, and this combustion flame successively spreads throughout the filter, causing other unignited parts of the particulate matter to also spread. In this way, it is possible to directly heat and combust the particulate matter, which significantly reduces power consumption compared to conventional electric particulate matter combustion equipment that heats the filter and heats and burns the particulate matter. can. That is, the heat capacity ratio of the particulate ylate is as low as 1/100, and since the particulate ylate is directly heated by supplying electricity, it can be heated in a short time.

In addition, in this invention, the metal plating layer 18, 1
Needless to say, if the particulate bridge between the holes 9 and 9 is lost due to combustion, the current supply to the filter will stop. A small amount of particulate ash remaining in the filter body 10 due to combustion can be removed by periodic maintenance such as cleaning the filter body 10 regularly or making the filter body a cassette type.

As explained above, this device is designed to remove particulate matter from exhaust gas by providing a metal plating layer only in a predetermined range at both ends of a honeycomb-type ceramic particulate matter collecting filter. This has the effect that power consumption can be significantly reduced compared to a conventional electric particulate combustion device having the following. In addition, the device of this invention does not require equipment such as an exhaust pressure sensor compared to the conventional device that supplies electricity to the filter, making the device configuration simpler, and since the device does not overheat the filter, the temperature of the filter during combustion processing is reduced. This has the effect of increasing the durability of the filter itself.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the configuration of one embodiment of the electric particulate waste combustion device of this invention, Fig. 2 is a perspective view of the particulate waste collection filter shown in Fig. 1, and Fig. 3 is a perspective view of the particulate waste collection filter shown in Fig.
The figure is a sectional view taken on plane A of FIG. 2. 1...Pateikureate collection filter, 7...
Exhaust pipe, 10...Filter body, 12...Exhaust inlet portion, 15...Exhaust outlet portion, 17...Main body center portion, 18, 19...Metal plating layer.

Claims (1)

[Scope of utility model registration request] In a ceramic particulate collection filter installed in the middle of an exhaust pipe of an internal combustion engine, a metal plating layer is provided in a predetermined range from the exhaust inlet and exhaust outlet excluding the central part of the filter, and both of the plating layers are provided. An electric particulate waste combustion device characterized in that it is connected to a power source so as to be energized in the event of a short circuit caused by the collected particulate waste.