JP2002168116A - Diesel particulate filter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a diesel particulate filter device capable of automatically controlling energizing current to a heater mounted on the filter properly with a controller and manually performing exhaust emission control by incorporating a timer thereinto, in burning particulates deposited in the filter. SOLUTION: Collection quantity detecting system 40, 44 are formed by intervening a second nonwoven fabric 34 and fitting electrodes 19 in between a catalytic layer 23 and retaining wire netting 25. Temperature sensors 8, 9 are provided so as to be brought into contact with the filter 3. The controller 10 controls the burning of the particulates by heating the filter 3 in response to information on an electric resistance value between the electrodes 19 equal to or lower than a predetermined value and/or information on temperature of the filter 3 equal to or lower than a predetermined value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diesel particulate filter for regenerating a filter by collecting particulate matter contained in exhaust gas discharged from a diesel engine with a filter and heating and burning the collected particulate matter. The present invention relates to a curated filter device.

[0002]

Conventionally, the suspended particles contained in the exhaust gas discharged from the engine carbon, soot, HC, SO _X
As a diesel particulate filter device for removing a particulate material composed of a ceramic or the like, a filter having a structure in which ceramic fibers are laminated and a filter having a honeycomb structure made of porous ceramics are known. This type of filter generally regenerates the filter by heating and burning the particulate material using a heat source when the particulate material is collected and the filter is clogged.

Conventionally, in a diesel particulate filter in which a filter is made of ceramic fibers, the ceramic fiber material can capture particulate matter such as black smoke contained in exhaust gas from an engine.
When heating and burning the collected particulate matter,
Since there is no auxiliary function to ignite, the combustion temperature is 600 ℃ ~
Since the temperature rises to 700 ° C., in order to burn the collected particulate matter, in most cases, it is necessary to perform heating by using a heater to perform auxiliary ignition.

A diesel particulate filter device having a regenerating function disclosed in Japanese Patent Application Laid-Open No. 8-313329 has a self-regenerating function capable of lowering the ignition temperature of particulates and reducing the supply of electric power to a current-carrying wire mesh. The filter is disposed in a pair of exhaust gas passages provided in the exhaust system. An electric wire mesh and an oxidation catalyst wire mesh for lowering the oxidation reaction temperature are arranged on the filter. A shutter valve provided in the exhaust gas passage is operated so as to automatically reduce the flow rate of the exhaust gas in response to an exhaust pressure equal to or higher than a predetermined value. When the ignition temperature of the particulates is lowered by the oxidation catalyst wire mesh and the shutter valve is closed, the particulates easily ignite and burn. Further, the filter can be manufactured by laminating felt-like ceramic fiber laminated members, pressing both sides of the laminated member with a heat-resistant iron wire mesh containing Ni, Cr, or the like, and forming the filter into a predetermined shape.

[0005]

By the way, in the case of a diesel particulate filter, when the particulate matter is collected by the filter, it is necessary to regenerate the filter by burning the collected particulate matter. The particulate matter must be heated by energizing a heater provided on the filter. In the case of a diesel particulate filter device, when particulate matter contained in exhaust gas discharged from a diesel engine is captured by the filter, particles of the particulate matter are caught by the ceramic fiber material filter, and these particles are trapped. Gradually increase and accumulate while filling gaps between adjacent fiber materials. When the filter fiber material is gradually filled and becomes almost full, the passage resistance of the exhaust gas sharply increases. At this time, the collection process of the particulate matter is switched to the other filter in the housing, and the particulate matter is removed. The filter on the side where the substance is deposited is regenerated.

[0006] The pressure rise in the exhaust pipe on the inlet side is proportional to the clogging state of the particulate matter in the filter. On the other hand, the absolute value of the pressure rise of the exhaust gas in the exhaust pipe depends on the exhaust gas passing through the filter. Some characteristics are proportional to the gas flow rate. Therefore, the flow rate of the exhaust gas discharged from the engine is constantly changed according to the engine load and the engine operating condition such as the engine speed. It is difficult to make a determination by detecting the amount of particulate matter collected. That is, since the pressure of the exhaust gas changes according to the flow rate of the exhaust gas flowing through the exhaust pipe, the exhaust gas pressure may be low even if a trapped amount of the particulate matter is accumulated on the filter.
In addition, even if the trapped amount of the particulate matter is not accumulated on the filter, the exhaust gas pressure may be high, and it is difficult to detect the trapped amount of the particulate matter by the exhaust gas pressure. It is.

[0007] The filter used in the conventional diesel particulate filter device is formed of a ceramic fiber material and is formed into a cylindrical shape, which is folded in a fold shape so as to have a large surface area. During combustion, the temperature of the filter and its atmosphere rises, and the raised temperature causes thermal deformation of the pleated cylinder. To maintain its shape, the folded part of the pleated filter must be reinforced with heat-resistant ceramics. Must
Further, since the filter is cylindrical, the arrangement in the housing is complicated, the number of parts of the filter is increased, and the manufacturing cost is increased.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems. A particulate matter contained in exhaust gas is collected by a filter, and the particulate matter collected by the filter is collected. In order to regenerate the filter by heating and burning the exhaust gas, the opening and closing for sending the exhaust gas to the exhaust gas purification chamber in response to the information on the amount of particulate matter collected by the filter and the filter temperature and / or the time set by the timer Equipped with a controller that controls the opening and closing operation by the valve actuator, the operation of an air pump for sending air to the exhaust gas purification chamber during regeneration, and the connection and disconnection of the heater provided in the filter during regeneration, thus ensuring efficient filter regeneration. An object of the present invention is to provide a diesel particulate filter device capable of performing processing.

The present invention provides a housing provided with an inlet-side exhaust pipe through which exhaust gas from an engine flows in and an outlet-side exhaust pipe through which the purified exhaust gas flows out, and the exhaust gas disposed in the housing. In a diesel particulate filter device for collecting and burning by heating a particulate matter contained in a filter, the filter comprises a heater wire positioned upstream of an exhaust gas flow, a first nonwoven fabric laminated with a ceramic fiber material, and a combustion device. A catalyst layer made of a metal material having a catalytic function of lowering the temperature, a second nonwoven fabric laminated with a ceramic fiber material, and a holding wire mesh made of a heat-resistant metal wire are sequentially laminated, and the second nonwoven fabric is interposed therebetween. A trapping amount detecting device provided with an electrode between a catalyst layer and the holding wire mesh, a temperature sensor for detecting a temperature of the filter, and The temperature of the filter is raised in response to the information that the electric resistance between the electrodes is equal to or less than a predetermined value and / or the information that the temperature of the filter is equal to or less than a predetermined value. The present invention relates to a diesel particulate filter device provided with a controller that controls heating and incineration.

[0010] When the electric resistance value is less than the predetermined value and / or when a predetermined collection time set by a timer elapses, the controller causes the filter to store the particulate matter in the filter. Assuming that a predetermined trapping amount has been reached, the heater wire and / or the catalyst layer are energized, and the particulate matter collected by the filter is heated and incinerated.

[0011] The controller may include the heater wire and / or
Or when energizing the catalyst layer to regenerate the filter, when the electrical resistance value is equal to or greater than the predetermined value and / or when a predetermined regeneration time set by a timer elapses, Assuming that the particulate matter trapped in the filter has been heated and incinerated, the energization between the heater wire and the catalyst layer is stopped.

In the diesel particulate filter device, when the controller is started, the particulate matter is deposited on the filter half by a trapping amount detection device provided in each of the filter halves where the filter is divided into two. A device capable of checking the amount and manually switching the regeneration process of the filter when detecting that the particulate matter has accumulated in the entire area of the filter in the amount equal to or greater than the predetermined amount.

The power supplied to the filter for regenerating the filter is supplied by a generator driven by the engine to generate a three-phase current, and the three-phase current supplied to the filter is switched by the controller by a switching relay. The voltage is controlled by turning on and off.

This diesel particulate filter device has a generator driven by the engine for supplying power to the heater and the catalyst layer to generate a three-phase current, and the generator includes a metal wire and / or the metal wire of the heater. The catalyst layer is divided into two or three sections, and each phase of the three-phase current is connected to the divided metal wire and / or the divided catalyst layer to generate heat.

[0015] The diesel particulate filter device may be arranged such that the exhaust gas flows into a predetermined region of the filter disposed in the housing, and the exhaust gas flows into the predetermined region of the filter upstream of the filter. At least two exhaust gas inflow passages provided to face each other, and on-off valves for opening and closing the exhaust gas inflow passages by actuators, respectively.

The ceramic fiber material constituting the first nonwoven fabric is a ceramic such as silicon carbide, silicon nitride, alumina, and forsterite.

The ceramic fiber material constituting the second nonwoven fabric is made of ceramics such as silicon carbide, silicon nitride, alumina and forsterite, and the second nonwoven fabric has a structure having a higher density than the first nonwoven fabric. It has a thick structure.

The catalyst layer is made of a metal porous material,
It contains Pt, Ni, Cr, Pd and / or Co.

The metal wire constituting the heater wire is made of a Fe-based metal containing Ni, Cr, etc., which has a catalytic action to lower the combustion temperature.

In the diesel particulate filter device, the exhaust gas flows into an exhaust gas purification chamber in which the filter is disposed, and is opposed to a region where the filter is divided into two filter halves on the upstream side of the filter. A pair of exhaust gas inlets provided, on-off valves respectively opened and closed by actuators provided at the exhaust gas inlets, and an air pump for supplying air to the exhaust gas purification chamber for heating and burning the particulate matter. The controller controls opening and closing of the on-off valve in response to the amount of the particulate matter deposited on the filter and the temperature of the filter, and controls the air pump to the filter on the regeneration side. Control to send air.

This diesel particulate filter device closes the on-off valve when the particulate matter collected in the filter half corresponding to one of the exhaust gas inlets reaches a predetermined amount, and closes the on-off valve. An air pump is operated to heat and incinerate the particulate matter collected in the filter half, and the on-off valve provided at the other exhaust gas inlet is opened to allow exhaust gas to flow. The particulate matter is collected by the filter half.

Since this diesel particulate filter device is configured as described above, the particulate matter in the exhaust gas is collected by the filter, and the filter is smoothly moved at an appropriate time when the amount of the collected particulate matter reaches a predetermined amount. The particulate matter can always be satisfactorily and reliably collected by the filter, and since the controller is set by the timer, it is possible to prevent the filter from being overheated.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a diesel particulate filter device according to the present invention will be described below with reference to the drawings.

An embodiment of the diesel particulate filter device (hereinafter referred to as DPF device) will be described with reference to FIGS. 1, 2 and 3. The DPF device collects particulate matter composed of carbon, soot, HC, SO _{X and the} like contained in the exhaust gas with the filter 3 and heats the particulate matter collected by the filter 3 with a heater provided in the filter 3. The filter 3 is incinerated and the filter 3 is regenerated. The DPF device has an inlet-side exhaust pipe 5 and an outlet-side exhaust pipe 6.
Are connected to and incorporated in an exhaust pipe from which exhaust gas EG generated by the engine is discharged. The housing 1 on which the filter 3 is disposed is formed in a box-like rectangular shape, and is configured to be easily attached to a vehicle body or a frame with a bracket or the like and to easily shield the outer surface of the housing from heat. ing. In the housing 1, an exhaust gas purification chamber 31 in which a filter 3 is disposed is formed, and a housing body 2A to which an outlet side exhaust pipe 6 is connected, an on-off valve 1
The housing cover 2B, which forms the exhaust gas inflow chamber 4 in which the exhaust gas inflow chambers 5 and 16 are disposed and to which the inlet-side exhaust pipe 5 is connected, and the partition plate 2C that partitions the exhaust gas inflow chamber 4 from the exhaust gas purification chamber 31 It is configured. Compartment plate 2C
, Exhaust gas inlets 11 and 12 are formed corresponding to positions where the filter 3 is divided into two filter half portions 3A and 3B.

The filter 3 bent in a bellows shape is disposed on the housing 1 so as to extend from one side of the housing 1 to the other side facing the direction crossing the flow of the exhaust gas EG. The filter 3 has edges 3 at both ends.
4 is a part of the peripheral portion 35 of the housing body 2A, the edges 36 at both ends of the partition plate 2C and the housing cover 2;
B is fixed in a sealed state while being sandwiched by a part of the peripheral portion 32 of B, and disposed in the exhaust gas purification chamber 31. In the filter 3, the ridge of the bellows fold at the boundary with the filter half portions 3 </ b> A and 3 </ b> B is fixed to the partition plate 2 </ b> C by the fixing tool 37. Further, the filter 3 has an upstream support plate 29U having a shape corresponding to the bellows shape from the upstream side of the bellows shape, and a shape corresponding to the bellows shape from the downstream side of the bellows shape, at an appropriate position on both sides or the center portion thereof. Downstream support plate 29L
The filter 3 is held so that the bellows shape of the filter 3 is not deformed by heat or the like.

The DPF device is mainly composed of a pair of filters provided opposite to a region where the filter 3 is divided on the upstream side of the filter 3 so that the exhaust gas EG flows into the exhaust gas purification chamber 31 in which the filter 3 is provided. Exhaust gas inlet 11,1
2. On-off valves 15, which are opened and closed by actuators 13 and 14 provided at exhaust gas inlets 11 and 12, respectively.
16. A heater wire 2 provided in the filter 3 for heating and burning the particulate matter collected in the filter 3
1, having a generator 7 driven by an engine. The generator 7 includes, in addition to the heater wire 21, the catalyst layer 23 and the holding wire mesh 2.
5 is configured as a heater to supply power to the three-phase load. The controller 10 controls the opening and closing of the on-off valves 15 and 16 by the actuators 13 and 14 in response to the amount of the particulate matter deposited on the filter 3 and the temperature of the filter 3. ON-O
It can be configured to control the switching of the FF and supply it to the heater.

The exhaust gas EG is sent from the inlet side exhaust pipe 5 to the filter 3 in the exhaust gas purifying chamber 31 through the exhaust gas inlet 11 and / or the exhaust gas inlet 12, and when passing through the filter 3, the exhaust gas EG is exhausted. Particulate substances contained in the gas EG are collected by the filter 3. Exhaust gas EG purified by incineration of particulate matter
Is discharged outside from the outlet side exhaust pipe 6. The air pump 17 is connected to the exhaust gas inlet 1 through the air pipe 18.
The air is supplied to the filter halves 3A and 3B from the air supply port 33 opened in the exhaust gas purifying chamber 31 corresponding to the exhaust gas purification chambers 1 and 12. The air pump 17 controls the controller 1 during regeneration of the filter halves 3A and 3B.
Control is performed such that air is supplied to the exhaust gas purifying chamber 31 in which the filter half sections 3A and 3B are located by a command of 0.

The filter 3 is provided inside the exhaust gas purifying chamber 31.
The filter is divided into two filter half portions 3A and 3B corresponding to the exhaust gas inlets 11 and 12, respectively. That is, the filter 3 includes a pair of filter halves 3A and 3B disposed in regions corresponding to the exhaust gas inlets 11 and 12.
Since the filter halves 3A and 3B are not separated by a plate or the like, their pressure states are almost equal, and the on-off valve 1
The opening and closing operations of 5, 16 can be performed smoothly. Filter 3
As shown in FIG. 3, a heater wire 21 constituting a heater arranged so as to extend in parallel to the upstream side of the flow of the exhaust gas EG, and a heat-resistant ceramic fiber arranged in contact with the heater wire 21 are provided. 1st nonwoven fabric 2 laminated at random
2. A catalyst layer 23 made of a metal member carrying a catalyst for reducing a combustion temperature and arranged in contact with the first nonwoven fabric 22, and heat-resistant ceramic fibers arranged in contact with the catalyst layer 23 are randomly laminated. The second nonwoven fabric 24 and the second
It has a laminated structure in which a heat-resistant metal wire disposed in contact with the nonwoven fabric 24 is sequentially laminated from a holding wire mesh 25 in which the wires are woven. The holding wire mesh 25 is made of the first nonwoven fabric 22 or the first nonwoven fabric 22.
The function of the filter 3 is to prevent the fibers or lines or particles of the catalyst layer 23 from scattering and to keep the shape of the filter 3.

In this embodiment, for example, as shown in FIG.
In addition, the three-phase load constituting the heater in the filter 3 is low.
Data line 21, catalyst layer 23 and holding wire mesh 25,
The three-phase AC line 36R of the generator 7 is a terminal of the heater wire 21.
19H, terminal 19C of catalyst layer 23 and end of holding wire mesh 25
Are connected to the child 19N. First nonwoven fabric 22
The constituent ceramic fiber materials are silicon carbide (SiC),
Silicon nitride (Si_ThreeN _Four), Alumina (Al_TwoO_Three),
It is a heat-resistant ceramic such as forsterite.
A fiber material having a length of about mm to 100 mm is preferable. Ma
The second nonwoven fabric 24 is made of the same ceramic as the first nonwoven fabric 22.
Fiber material can be used, and the density is higher than that of the first nonwoven fabric 22.
Is configured to have a large structure or a thick structure. Ma
Further, the catalyst layer 23 promotes the oxidation of HC and the combustion temperature of C.
Catalysts such as platinum (Pt), nickel (N
i), chromium (Cr), palladium (Pd) and / or
Formed from a material containing cobalt (Co)
You. The catalyst layer 23 is based on, for example, Ni and Cr.
Metal materials such as metal wires, wire mesh, metal sheet, etc.
A state in which particles composed of Cr, Pd and / or Co are dispersed
It is composed of a material carried in a state.

The DPF device detects an electric resistance value between two spaced surfaces in the filter 3 which changes according to an amount of the particulate matter deposited on the filter 3, and determines a trapped amount of the particulate matter in the filter 3. It has trapped amount detection devices 40 and 44 for detection. The trapping amount detectors 40 and 44 are provided in the filter halves 3A and 3 where the filter 3 is divided into two, and detect the trapping amounts of the particulate matter deposited on the filter halves 3A and 3 respectively. Is configured. The trapping amount detectors 40 and 44 are provided on the first electrode provided on the heat-resistant metal wire constituting the catalyst layer 23 provided in the filter 3 and on the heat-resistant metal wire of the holding wire mesh 25 disposed downstream thereof. The electrical resistance between the second electrode and the second electrode is detected by a resistance detector including a comparator and a bridge circuit. Collection amount detection devices 40 and 44
Is based on the fact that the amount of carbon of the particulate matter deposited on the filter 3 and the electrical resistance value have a characteristic that is substantially proportional to the amount of particulate matter collected on the filter 3, that is, the amount of deposition. It is to detect.

Further, the DPF device includes temperature sensors 8 and 9 extending in a direction traversing the filter 3 to detect the temperature of the filter 3. The controller 10 controls the output of the generator 7 in response to the temperatures detected by the temperature sensors 8 and 9, and controls the temperature of the filter 3 to a predetermined temperature. That is, the controller 10 controls the power supply to the heater in response to the temperatures of the filter halves 3A and 3B of the filter 3 detected by the temperature sensors 8 and 9 and the ambient temperature thereof, thereby preventing the filter 3 from overheating. . The temperature sensors 8 and 9 include, for example, a metal wire 38 made of nickel or the like having a large temperature coefficient of resistance, and an outer tube 39 made of a heat-resistant and corrosion-resistant ceramic such as alumina covering the entire outer surface of the metal wire 38. ing. The temperature sensors 8 and 9 are, for example, the filter half 3 of the filter 3.
The bellows A and 3B are arranged along the high temperature region of the bent portion. Each of the temperature sensors 8 and 9 is composed of, for example, a circuit including a bridge circuit and a comparator. In the temperature sensors 8 and 9, the metal wire 38 has a large positive temperature coefficient of resistance when energized. Therefore, when the temperature of the filter 3 rises, the resistance of the metal wire 38 increases and flows through the temperature sensors 8 and 9. The current decreases. Therefore, a change in the current flowing through the temperature sensors 8 and 9 can be detected by the above-described circuit, and the temperatures of the filter halves 3A and 3B of the filter 3 can be detected.

The controller 10 controls the energization of the heater in response to the temperature detected by the temperature sensors 8 and 9 and prevents the air pump 17 from overheating in order to prevent the filter 3 from overheating.
The operation of the motor for driving the exhaust gas is controlled to
The amount of exhaust gas EG or air supplied to the inside is adjusted. The controller 10 includes a filter half 3A of the filter 3,
At the time of 3B regeneration, for example, when the engine load is high,
A large amount of exhaust gas EG or air gas is sent to the filter 3 by increasing the rotation speed of the motor, and when the rotation speed is low, control is performed to reduce the rotation speed of the motor and send a small amount of gas to the filter 3. The controller 10 includes a collection amount detection device 40,
The electric resistance value of the filter 3 detected by 44 is detected, and if the electric resistance value becomes smaller than a predetermined electric resistance value, the particulate matter collected by the filter 3 reaches a predetermined collection amount. The start of regeneration is started in response to the electric resistance value, and then control is performed to energize the heater wire 21 in order to heat and incinerate the particulate matter deposited on the filter 3. Further, the controller 10 controls the operation of the air pump 17 and the operations of the actuators 13 and 14 that open and close the on-off valves 15 and 16 in response to the regeneration of the filter 3.

Next, referring to FIGS. 4, 5 and 6, a description will be given of a multi-pole permanent magnet type generator 7 having a plurality of systems of power generation characteristics incorporated in this DPF device. Generator 7
Is configured to generate three-phase alternating current, three types of windings are prepared, their phases are matched, and the controller 10 can switch and control the switching relays 1R to 12R to switch the voltage. 4 and 6
As shown in the figure, windings U1-V1-W1, windings U2-V2
Since -W2 and the windings U3-V3-W3 are configured to overlap each other, there is no problem even if these windings are connected in series or in parallel. The generator 7 includes a stator 42 fixed to the housing, and a rotor 41 that forms a rotation shaft rotatably supported by the housing with a gap formed in the stator 42. As shown in FIG. 6, winding groups U1-V1-W1, winding groups U2-V2-
W2 and the winding group U3-V3-W3 are divided and wound. A lead line of the neutral point 26N is formed corresponding to the lead line of each winding. These lead-out lines incorporate the switching relays 1R to 12R, respectively, and are connected to the controller 10.

Winding group U1-V1-W1, winding group U2-V
Regarding the connection of 2-W2 and the winding group U3-V3-W3, a large capacity, that is, a large switching relay 1R is incorporated in the line 1L connecting the winding U3 and the winding U2.
A large-sized switching relay 2R is incorporated in a line 2L connecting the windings U2 and U1, and the windings U1, U2, and U3 are connected in series with each other. A large-sized switching relay 5R is incorporated in a line 5L connecting the winding V3 and the winding V2, and a large-sized switching relay 6R is incorporated in a line 6L connecting the winding V2 and the winding V1. The windings V1, V2 and V3 are connected in series with each other. Further, the winding W3 and the winding W
2, a large switching relay 9R is incorporated in the line 9L connecting the winding W2 and the winding W1, and a large switching relay 10R is incorporated in the line 10L connecting the winding W1 and the windings W1, W2 and W3. They are connected in series with each other.

The line 3L connecting the winding U3 and the neutral point 26N incorporates a small-capacity, ie, small, switching relay 3R. The line 3L connects the winding U2 to the neutral point 26N. Has a small capacity, that is, a small switching relay 4R. Winding V3 and neutral point 26
A small capacity, ie, a small switching relay 7R, is incorporated in a line 7L connecting N, and a small capacity, ie, a small switching relay 8R is incorporated in a line 8L, which connects the winding V2 and the neutral point 26N. ing. Further, a small capacity, that is, a small switching relay 11R is incorporated in a line 11L connecting the winding W3 and the neutral point 26N, and a small capacity is set in a line 12L connecting the winding W2 and the neutral point 26N. That is, a small switching relay 12R
Is incorporated.

As described above, the winding groups U1-V1-W1,
Winding group U2-V2-W2 and winding group U3-V3-W3
Are connected, the controller 10 turns on the switching relays 1R to 12R as shown in Table 1.
When the control of -OFF is performed, in the low rotation speed region, three units of the three-phase winding group are connected in series, that is, the winding U1, the winding U2, and the winding U3, the winding V1, the winding V2, and the winding Wire V3 and winding W
1 and the winding W2 and the winding W3 are connected in series, respectively, and as shown in FIG. 5, a predetermined output voltage can be generated even at a low rotation speed. In the middle rotation region, two units of the three-phase winding group are connected in series, that is, the winding U2 and the winding U
3, the winding V2 and the winding V3, and the winding W2 and the winding W3 are connected in series, and as shown in FIG. 5, a predetermined output voltage can be generated even at a middle rotation speed. Further, in the high rotation region, one of the three-phase winding groups is connected, that is, the winding U3, the winding V3, and the winding W3 are connected, and FIG.
As shown in (1), a predetermined output voltage is generated even at a high rotation speed.

[Table 1]

In the generator 7, as shown in FIG. 5, the voltage is almost tripled when the power generator 7 is overlapped at low speeds, but slightly decreases due to the reactance effect. Therefore, if two stations are connected, the voltage rises as a result of the decrease in the reactance, so that the point moves from the point A1 to the point A2. By performing switching control of the switching relays 1R to 12R by the controller 10, an output voltage (V) as shown in FIG. 5 can be obtained. Characteristics G ₁ of the generator 7 is shown by the following equation. G ₁ = [(3) ^1/2 · 2πf / (2) ^1/2 ] · φ ₁ · W
₁ · kw ₁ where f: frequency, φ ₁ : magnetic flux, W ₁ : number of coil turns,
k: the number of slots, w ₁ : the number of poles. Therefore, the characteristics G1 of the generator 7, the number of turns W ₁ is large, the output voltage with an increase in speed increases. Therefore, at low, medium and high speeds, as shown in Table 1, the controller 10 turns on the switching relays 1R to 12R.
By performing the -OFF control, an appropriate output voltage can be obtained. Switching relays 1R and 5 shown in FIG.
R and 9R are not necessarily required, but are provided to ensure the safety of the switching control.

Next, the operation of the DPF device will be described with reference to the processing flowcharts of FIGS. In the processing flowchart, the filter half unit 3A is described as the A side, and the filter half unit 3B is described as the B side. As shown in FIG. 7, in using the DPF device, first,
The controller 10 checks whether each component is normal. The controller 10 includes the filter half unit 3
A, for detecting the collecting state of particulates substance 3B, the collection amount detection device 40, 44 detects the electrical resistance between the holding wire mesh 25 and the catalyst layer 23, and the clogging resistance R ₁ of the B-side detecting the clogging resistance R ₂ of the a side, R ₁ and R ₂
Is determined whether or not R ₀₁ = 1Ω or less (steps 1 and 2). If R ₁ and R ₂ are equal to or less than R ₀₁ = 1Ω, the temperature resistance (RT ₁ ) of the temperature sensor 9 is determined in advance to check whether the temperature sensor 9 provided in the filter half 3B is disconnected. It is determined whether or not the temperature resistance is lower than a predetermined temperature resistance (RTV = 5Ω) (step 3). If the temperature resistance is low, it is checked whether or not short-circuiting is higher than a predetermined temperature resistance (RTV ₁ = 0.05Ω). It is determined whether or not it is (step 4). With respect to the temperature resistance (RT ₂ ) of the temperature sensor 8, a disconnection and a short-circuit state are checked similarly to the temperature sensor 9 (steps 5 and 6). Further, the resistance (RH ₁ ) on the B side and the resistance (RH ₂ ) on the A side of the heater (the heater wire 21, the catalyst layer 23 and / or the holding wire mesh 25) are short-circuited with the disconnection (RC ₁ = 5Ω or less). RC ₂ = 0.25Ω
(Steps 7, 8, 9 and 1)
0). Further, as shown in FIG. 8, the conduction state of the solenoids of the actuators 13 and 14 of the on-off valves 15 and 16 is checked (steps 11 and 12), and the operation state of the air pump 17 is checked (step 13). The continuity state of 18 is checked (steps 14 and 15). If any of these devices is defective, the controller 10 displays a defect (step 122), and the process is switched from automatic operation to manual operation by an automatic-manual switching device (not shown) such as a manual button in step 76.

As shown in FIG. 9, if there is no malfunction in these devices, the controller 10 proceeds to step 16.
To control the operation of the on-off valves 15 and 16, drive the engine, and generate the exhaust gas EG generated by the engine.
The gas flows into the exhaust gas inflow chamber 4 through the inlet-side exhaust pipe 5. The actuators 13 and 14 are driven, the on-off valve 15 is closed by the actuator 13, and the on-off valve 16 is determined to be opened by the actuator 14 (step 16). detecting clogging resistance R ₁ of the filter half-portion 3B in current amount detecting device 44, it is determined whether or not lower than a predetermined resistance R ₀₁ (step 17), measuring the elapsed time sigma _t sets the timer when high (Step 28), and when the elapsed time _Δt exceeds a predetermined time t (step 2).
9), go to step 18. When clogging resistance R ₁ is lower than the predetermined resistance R _01, the filter half-portion 3B opens the opening and closing valve 15 closes the on-off valve 16 as being deposited particulates matter (step 18). Here, the exhaust gas from the engine is sent to the filter half portion 3A, where the filter half portion 3A collects particulate matter in the exhaust gas and regenerates the filter half portion 3B.

The heater of the filter half 3B is rapidly heated.
Particulates deposited on the filter half 3B
The substance is heated and incinerated (step 19). Temperature sensor 9
Temperature resistance RT of the filter half portion 3B₁Detect
And a predetermined temperature R _T500(= 500 ° C, for example
Is determined to be higher than 0.5Ω) (step 2).
0) If the temperature is low, the heater continues to be rapidly heated;
Drives the air pump 17 (step 21), and the air on the
Air is sent to side B through trachea 18 (step 2).
2), the particulate matter in the filter half 3B
Since it is heated and incinerated, the power to the heater is gradually reduced.
Step 23) Then, filter half with temperature sensor 9
The temperature resistance RT of the section 3B is detected, and a predetermined temperature R_T800(=
800 ° C, for example, 0.75Ω)
(Step 24), and if it is low, the trapping amount detection device 44
And the clogging resistance R of the filter half 3B₁Is detected and
Constant clogging resistance R₀₁(= 1Ω)
(Step 25). Particulate if low
Since the quality is still accumulated, set the timer
To measure the elapsed time t and continue energization (step 3
7), predetermined time t _R1Playback process until
Processing (step 38), and then proceed to step 26.
No. If high, the particulates of the filter half 3B
The filter material is in a state where the heat
Since the part 3B is in a regenerated state, the air pump 17
Stops (step 26) and empty the filter half unit 3B.
The supply of air is stopped (step 27).

[0041] In step 24, the temperature R ₁ is temperature R
If it is higher than _T800 , the filter half 3B is in an overheated state, so the air pump 17 is stopped (step 30), and the supply of air to the filter half 3B is stopped (step 31). The heater on the B side is turned off (step 32). Then, to detect the temperature RT ₁ of the filter half-portion 3B by the temperature sensor 9, a predetermined temperature _{R T500 (= 500 ℃, 0.5Ω} ) decided in advance to determine whether less than (step 33), high if Returning to step 30, the air supply stop state is continued, and if it is low, the air pump 17 is driven again to supply air to the filter half section 3B (step 34), and air is supplied to the filter half section 3B. (Step 35), and then reduce the current flowing through the filter half 3B (Step 36), and return to Step 24.

Also, as shown in FIG.
Since the filter half section 3B is in a regenerated state in (3), the supply of air to the filter half section 3B is stopped, and then the power supply to the heater of the filter half section 3B is stopped (step 39). Detecting the clogging resistance R ₂ of the filter half-portion 3A in collection amount detection device 40 determines whether or not lower than a predetermined resistance R ₀₁ (step 40), the elapsed time sigma _t sets the timer when high Measure (Step 4
9) When the elapsed time _Δt exceeds a predetermined time t (step 50), the process proceeds to step 41. Clogging resistance R
₂ is at lower than a predetermined resistance R _01, the filter half-portion 3A opens the opening and closing valve 16 closes the on-off valve 15 as being deposited particulates material (Step 4
1). Here, the exhaust gas from the engine is sent to the filter half part 3B, where the filter half part 3B collects particulate matter in the exhaust gas and regenerates the filter half part 3A.

The heater of the filter half 3A is rapidly heated.
Particles accumulated in the filter half 3A
The waste material is heated and incinerated (step 42). Temperature sensor 8
The temperature resistance RT of the filter half 3A_TwoDetect
And a predetermined temperature R _T500(= 500 ° C, for example
Is determined to be higher than 0.5Ω) (step 4).
3) If the temperature is low, continue the rapid heating of the heater.
Drives the air pump 17 (step 44), and empties the A side.
Air is sent to side A through trachea 18 (step 4).
5) Then, the particulates of the filter half 3A
Since the waste material is heated and incinerated, gradually energize the heater.
Aperture (step 46), then fill with temperature sensor 8
Temperature resistance RT of Ta half 3A_TwoAt the specified temperature
R_T800(= 800 ° C., for example, 0.75Ω)
It is judged whether or not it is not (step 47).
Clogging resistance R of the filter half portion 3A by the feeding device 40_TwoTo
Detects and determines a predetermined clogging resistance R₀₁(= 1Ω)
It is determined whether or not the pressure is higher (step 48). If low
Sets the timer and measures the elapsed time t (step
55), predetermined time t_R1(For example, 10 minutes)
The reproduction process is continued until the time has elapsed (step 56).
Then, the process proceeds to step 57.

In step 47, the temperature R ₂ is changed to the temperature R
If it is higher than _T800 , the filter half section 3A is in an overheated state, so the air pump 17 is stopped (step 51), and the supply of air to the filter half section 3A is stopped (step 52). The heater on the A side is turned off (step 53). Then, to detect the temperature RT ₂ of the filter half-portion 3A by the temperature sensor 8, a predetermined temperature _{R T500 (= 500 ℃, 0.5Ω} ) decided in advance to determine whether less than (step 54), high if Returns to step 51 to continue the air supply stop state, and returns to step 44 if the air supply is low. Further, in step 48, if clogging resistance R ₂ of the filter half-portion 3A is higher than a predetermined clogging resistance R ₀₁ (= 1Ω) is is, in the case where the filter half portion 3A is reproduced, the air pump 1
7, the supply of air to the filter half 3A is stopped (step 58), and the power supply to the heater of the filter half 3A is stopped (step 5).
9). Here, since the regeneration of the filter half section 3A has been completed, the filter half section 3A is in a state of waiting for the subsequent particulate matter collection process, and the exhaust gas purification process returns to the first step 1 and repeats the above control. Will repeat.

As shown in FIG. 11, when a failure is displayed in steps 2 to 15, the controller 1
Since the automatic processing cannot be performed by using the zero button, the exhaust gas purification processing is performed by manual button operation (step 76). It is determined whether the A-side on-off valve 16 is open and the B-side on-off valve 15 is closed (step 77).
If not, the on-off valve 15 is manually closed (step 60). A side on-off valve 16
Is open, the heater of the filter half unit 3B is turned on by manual operation to perform the regeneration process of the filter half unit 3B (step 78). Then, it is determined whether higher than the temperature temperature resistance RT ₁ filter half portion 3B is predetermined resistance RT ₅₀₀ (= 0.65Ω) by the temperature sensor 9 (step 79), the filter half-portion 3B when low If the temperature is high, the air pump 17
(Step 80), air is supplied to the filter half 3B through the air pipe 18 (step 81), and the particulate matter collected in the filter half 3B is heated and incinerated. Part 3
The current supplied to the heater B is reduced (step 82). Therefore, the temperature resistance RT ₈₀₀ to temperature resistor RT ₁ filter half portion 3B is predetermined by the temperature sensor 9 (= 0.75
Ω) is determined (step 83).

The temperature resistance RT ₁ is a predetermined temperature resistance RT
If less than ₈₀₀ detects clogging resistance R ₁ of the filter half-portion 3B in collection amount detection device 44, predetermined predetermined clogging resistance R ₀₁ (= 1 [Omega) low determines whether more (step 84). If it is lower, the timer is set and the elapsed time t is counted (step 85).
The elapsed time t is a predetermined period t _R1 (for example, 10
Minutes) have elapsed (step 86). Further, in step 83, if the temperature resistance RT ₁ is higher than the temperature resistance RT ₈₀₀ decided in advance (= 0.75Ω) it is is, in the case where the filter half portion 3B excessively heated, to stop the air pump 17 ( Step 87), the power supply to the heater is turned off (step 88), and the air supplied to the filter half unit 3B is stopped (step 89).
Next, the temperature sensor 9 detects the temperature resistance RT of the filter half section 3B, and determines whether the temperature resistance RT is lower than a predetermined temperature resistance RT ₅₀₀ (= 0.65Ω) (step 90). If it is low, the process returns to step 80 to continue the heating state of the filter half 3B, and if it is high, the process returns to step 8 to turn off the air pump 17.
Return to 7. Further, in step 84, when the resistance R ₁ is higher than a predetermined clogging resistance R ₀₁ (= 1Ω) has no deposition of the particulate material of the filter half-portion 3B, since in the state of being reproduced, in the exhaust gas Then, the process enters a standby state in which the purification process for collecting the particulate matter is performed, and the process proceeds to step S60.

As shown in FIG. 12, in step 60,
When a predetermined time elapses, the filter half unit 3A
Since the particulate matter is in a deposited state by the exhaust gas purifying process described above, the on-off valve 15 is closed to shift to the regeneration process of the filter half portion 3A (step 6).
0). Energize the heater provided in the filter half 3A,
Heat and burn the particulate matter (Step 6)
1). The temperature resistance RT ₂ of the filter half section 3A is determined by the temperature sensor 8 to a predetermined temperature resistance RT ₅₀₀ (= 0.6
It is determined whether the pressure is higher than 5Ω) (step 62). If the pressure is lower, the heating state of the filter half 3A is continued. If the pressure is higher, the air pump 17 is operated (step 63). Air is supplied to the filter section 3A (step 64), then the particulate matter collected in the filter half section 3A is heated and incinerated, and then the current supplied to the heater of the filter half section 3A is reduced (step 65). . Therefore, the temperature resistance RT ₂ of the filter half-portion 3A determines whether predetermined temperature resistance RT ₈₀₀ (= 0.75Ω) lower by a temperature sensor 8 (step 66).

The temperature resistance RT ₂ is a predetermined temperature resistance RT
If less than ₈₀₀ detects the clogging resistance R ₂ of the filter half-portion 3A in collection amount detection device 40, predetermined predetermined clogging resistance R ₀₁ (= 1 [Omega) low determines whether more (step 67). If it is lower, the timer is set and the elapsed time t is counted (step 68).
The elapsed time t is a predetermined period t _R1 (for example, 10
Minutes) have elapsed (step 69). Further, in step 66, if the temperature resistance RT ₂ is higher than the temperature resistance RT ₈₀₀ decided in advance (= 0.75Ω) is is, in the case where the filter half portion 3A is overheating, stop the air pump 17 ( Step 70), the power supply to the heater is turned off (Step 71), and the air supplied to the filter half 3A is stopped (Step 72).
Next, the temperature sensor 8 detects the temperature resistance RT of the filter half section 3A, and determines whether the temperature resistance RT is lower than a predetermined temperature resistance RT ₅₀₀ (= 0.65Ω) (step 75). If it is low, the process returns to step 63 to continue the heating state of the filter half section 3A, and if it is high, step 8 to turn off the air pump 17
Return to 0. Further, in step 67, when the resistance R ₂ is higher than a predetermined clogging resistance R ₀₁ (= 1Ω) has no deposition of the particulate material of the filter half-portion 3A, since in the state of being reproduced, in the exhaust gas A standby state for purifying the particulate matter is performed, the manual operation is terminated (step 73), the engine is restarted (step 74), the process proceeds to step 3, and the exhaust gas purifying process is repeated.

Next, control for rapidly heating a heater provided in the filter half portion 3A or 3B (hereinafter, referred to as the filter 3) during reproduction will be described with reference to FIG. When the heater is rapidly heated (step 91), the rotational speed GR of the generator 7 is measured (step 92). It is determined whether or not the rotation speed GR is lower than a predetermined rotation speed 1100 rpm (step 93). If the rotation speed GR is lower, the temperature Ft of the filter 3 is measured, and whether or not the temperature Ft is lower than the predetermined temperature 400 ° C. Is determined (step 94). When the temperature Ft is lower than 400 ° C., it is necessary to rapidly heat the filter 3. Therefore, in order to supply high power to the heater, three-phase AC winding groups of the generator 7 are connected in series. To supply high power to the heater (step 95). That is, the controller 10 controls the heater (the heater wire 21,
In order to rapidly heat the catalyst layer 23 and / or the holding wire mesh 25, a three-phase winding group (winding group U1-V1-W1, winding group U2
-V2-W2 and the winding group U3-V3-W3) are connected in series. Here, the filter 3 is rapidly heated, and then the process proceeds to step 62. In step 94, the temperature Ft of the filter 3 is set to a predetermined temperature of 400 ° C.
If higher, the temperature Ft is the predetermined temperature 450 ° C
It is determined whether or not the temperature is lower (step 96). If the temperature is lower, the temperature Ft of the filter 3 is set to a temperature of 400 ° C to 450 ° C.
, Two of the three-phase AC winding groups of the generator 7 are connected in series, and medium power is supplied to the heater (step 97). Here, the filter 3 is medium-heated, and then the process proceeds to step 62.

In step 93, the rotational speed GR
Is higher than 1100 rpm, the rotation speed 20
It is determined whether it is lower than 00 rpm (step 9).
8). When the rotation speed GR is lower than the rotation speed 2000 rpm, the rotation speed GR of the generator 7 is 1100 rpm.
Since it is within the range of ２０００2000 rpm, it is determined whether the temperature Ft of the filter 3 is not lower than a predetermined temperature of 400 ° C. (step 99). When the temperature Ft is lower than 400 ° C., the filter 3 needs to be heated to a medium level.
Of the three-phase AC winding groups, two of which are connected in series, and medium power is supplied to the heater (step 100). Here, the filter 3 is medium-heated, and then the process proceeds to step 62.
If the temperature is high, it is determined whether the temperature Ft is lower than a predetermined temperature 450 ° C. (step 101). If the temperature is low, the temperature Ft of the filter 3 is from 400 ° C. to 450 ° C.
, One of the three-phase AC winding groups of the generator 7 is connected to supply low power to the heater, and the filter 3
Is performed (step 102), and then the process proceeds to step 62. If the value is high in step 101, the process proceeds to step 62. In step 98, when the rotation speed GR is higher than 2000 rpm, the temperature Ft of the filter 3 is detected by the temperature sensor 8 or 9.
Is determined to be lower than a predetermined temperature 500 ° C. (step 103).
Since the filter 3 does not need to be heated too much, one of the three-phase alternating current winding groups of the generator 7 is connected to supply low power to the heater, and the filter 3 is regenerated. (Step 104), and then the process proceeds to step 6.
Proceed to 2. If it is high in step 103, the power supply to the heater is turned off (step 105), and the process proceeds to step 62.

Next, with reference to FIG. 14, a description will be given of a case where the current supplied to the heater provided in the filter 3 is reduced.
To reduce the current supplied to the heater (step 10
6), measure the rotational speed GR of the generator 7 (step 10)
7). It is determined whether or not the rotation speed GR is lower than a predetermined rotation speed 1100 rpm (step 108). If the rotation speed GR is low, the three-phase alternating current winding group of the generator 7 is connected in a single line and a short time Δt, For example, the heater is energized for 10 seconds (step 109). Then, to detect the temperature resistance RT ₂ of the filter 3 by the temperature sensor 8 or 9, it determines whether the temperature resistance RT ₂ is lower than the predetermined temperature 500 ° C. (Step 110). When the temperature resistance RT ₂ is lower than 500 ° C., the filter 3 needs to be heated to a medium level. Therefore, in order to supply medium power to the heater, two sets of three-phase AC winding groups of the generator 7 are connected. Are connected in series to supply a middle power to the heater (step 111). That is, the controller 10
Is a three-phase winding group (winding group U2-V2-W2 and winding group U3-V3) for medium heating of the heater (heater wire 21, catalyst layer 23 and / or holding wire mesh 25) provided in the filter 3. −
W3) is connected in series. Here, the filter 3 is medium-heated. Further, in step 110, if the case temperature resistance RT ₂ of the filter 3 is higher than the predetermined temperature 500 ° C., it is determined whether or not lower than the temperature 800 ° C. the temperature Ft is decided in advance (step 112), low Include steps 25, 48, and 6 corresponding to the reproduction state of the filter 3.
Proceed to 7 or 84 to continue the processing. If the temperature Ft is higher than the predetermined temperature 800 ° C., the filter 3
30, 51, 70 or 8 corresponding to the playback state of
Proceed to 7 to continue the processing.

In step 108, the generator 7
If the rotation speed GR is higher than 1100 rpm, it is determined whether or not the rotation speed is lower than 2000 rpm (step 113). Rotation speed GR is 2000rpm
m, the rotational speed GR of the generator 7 is in the range of 1100 rpm to 2000 rpm.
One of the three-phase alternating current winding groups of the generator 7 is connected, and low power is supplied to the heater (step 114). Then, it is determined whether the temperature resistance RT ₂ of the filter 3 is lower than the predetermined temperature 500 ° C. by the temperature sensor 8 or 9 (Step 115). When the temperature resistance RT ₂ is lower than 500 ° C., the filter 3 needs to be heated to a medium level. Therefore, in order to supply medium power to the heater, two sets of three-phase AC winding groups of the generator 7 are connected. the energizing the medium power by connecting in series with the heater (step 116), then it is determined whether the temperature resistance RT ₂ is lower than the temperature Rt (= 800 ° C.) (step 117). Further, in step 115, the temperature Rt (= 500 to temperature resistor RT ₂ of the filter 3 is predetermined
° C.) when higher, the thermal resistance RT ₂ temperature Rt (=
800 ° C.) is determined (step 11).
7). If the temperature resistance RT ₂ is lower than the temperature 800 ° C., the step corresponding to the reproduction state of the filter 3 25,4
Proceed to 8, 67 or 84 to continue the process. Also, if higher than the temperature 800 ° C. the temperature resistance RT ₂ is predetermined, the step corresponding to the reproduction state of the filter 3 30,5
Proceed to 1, 70 or 87 to continue the process.

In step 113, when the rotation speed of the generator 7 is higher than 2000 rpm, one of the three-phase alternating current winding groups of the generator 7 is connected, a low voltage is supplied to the heater, and the filter 3 is turned on. Reproduction is performed (step 118). Next, the resistance RT of the filter 3 is detected by the temperature sensor 8 or 9.
_It is determined whether or not ₂ is lower than a predetermined temperature of 500 ° C. (step 119). If the temperature resistance RT ₂ is lower than 500 ° C., the process proceeds to step 118 to apply a low voltage to the heater of the filter 3 to heat the filter 2. If the temperature resistance RT ₂ is higher than 500 ° C., The power supply to the heater is turned off (step 120). Then,
Temperature resistance RT ₂ determines whether predetermined temperature Rt (= 800 ° C.) lower than (step 121). If the temperature resistance RT ₂ is lower than 800 ° C., the step 25, 48, 67 or 84 corresponding to the regeneration state of the filter 3
Go to and continue the processing. Also, if higher than the temperature 800 ° C. the temperature resistance RT ₂ is predetermined, the process proceeds to step 30,51,70 or 87 corresponding to the reproduction state of the filter 3, the process continues.

[0054]

Since the diesel particulate filter device according to the present invention is constructed as described above, the heater provided in the filter half is energized in order to regenerate one of the filters. When heating the filter, the generator can always supply a matched current corresponding to the trapped amount, exhaust gas temperature and filter temperature accumulated in the filter half, and there is no overheating or insufficient heating of the filter half. The reproduction process can be performed appropriately and smoothly. Also, since the controller regenerates the filter half by switching to manual operation together with the timer, the filter half can not be regenerated due to failure of parts of the device itself. Preparation for exhaust gas purification, that is, a standby state can be created.

Further, the amount of trapped particulate matter is not detected by the pressure of the exhaust gas, but the amount of trapped particulate matter is detected by the electric resistance of the filter itself, which varies according to the amount of trapped particulate matter. It is possible to reliably detect an accurate trapping amount without being affected by the operating state of the device. In addition, in this diesel particulate filter device, the housing in which the filter is disposed is formed in a box-like, that is, a rectangular shape, and has an extremely compact structure.
It can be easily installed not only on a new vehicle but also on an existing vehicle as a muffler mounting structure or a muffler instead of a muffler. Further, when the filter is heated by the heater, the temperature sensor is arranged along the high temperature area of the bent portion of the bellows of the filter, for example, the highest temperature area of the filter, so that the temperature in the entire area of the filter is equal to the temperature. The temperature is substantially adjusted to a temperature equal to or lower than the temperature detected by the sensor, thereby preventing the filter from being damaged due to local overheating or the like.

Further, since the filter has a catalyst layer for suppressing the combustion temperature in the ceramic fiber, the particulate matter collected by the filter can be heated and incinerated at a low temperature. It is possible to prevent a decrease in the durability of the filter, to prolong the life of the filter, and to increase the durability. Further, since the filter has a heater wire extending substantially parallel to the entire surface of the ceramic fiber, the particulate matter collected by the filter is uniformly heated and incinerated without being locally heated. . Also,
Even if a heater wire comes into contact with another heater wire due to heating, since the heaters are connected in parallel, the total resistance does not substantially change, and the function of smoothly burning and burning particulate matter is achieved. be able to.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a diesel particulate filter device according to the present invention.

FIG. 2 is an enlarged perspective view showing a filter in the diesel particulate filter device of FIG.

FIG. 3 is an enlarged exploded view of a portion A in FIG. 2;

FIG. 4 is a schematic explanatory view for explaining wiring of an embodiment of a multi-pole permanent magnet generator.

FIG. 5 is a graph showing a relationship between an output voltage and a rotation speed that changes according to a connection state of divided windings.

FIG. 6 is a schematic explanatory view showing a connection state of divided windings.

FIG. 7 is a process flowchart showing operation control of the diesel particulate filter device.

FIG. 8 is a processing flowchart showing operation control following the processing flow shown in FIG. 7;

FIG. 9 is a process flowchart showing an operation control following the process flow shown in FIG. 8;

FIG. 10 is a processing flowchart showing an operation control following the processing flow shown in FIG. 9;

FIG. 11 is a processing flowchart showing an operation control following the processing flow shown in FIG. 1;

FIG. 12 is a processing flowchart showing operation control following the processing flow shown in FIG. 11;

FIG. 13 is a process flowchart showing operation control when the heater of the filter is rapidly heated.

FIG. 14 is a process flowchart showing an operation control when a current supplied to the heater of the filter is narrowed down.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Housing 3 Filter 3A, 3B filter half part 7 Generator 8,9 Temperature sensor 10 Controller 13,14 Actuator 15,16 On-off valve 17 Air pump 19H, 19C, 19N Terminal 21 Heater wire 22 First nonwoven fabric 23 Catalyst layer 24 First 2 Non-woven fabric 25 Holding wire mesh 26N Neutral point 40, 44 Collection amount detecting device 41 Rotor 42 Stator 43 Stator core 1R-12R Switching relay 1L-12L Line EG Exhaust gas U1, U2, U3, V1, V2, V3, W1, W2 , W
3 winding

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) F01N 3/02 341 F01N 3/02 341R 321 321A B01D 39/14 B01D 39/14 BC 39/20 39 / 20 D 46/42 46/42 B 53/94 B01J 35/04 ZABA B01J 35/04 ZAB B01D 53/36 103C F term (reference) 3G090 AA02 AA03 AA04 BA04 CA01 CB12 CB13 CB18 CB23 DA00 DA13 EA04 4D019 AA01 BA05 BC07 CA02 CB04 CB09 DA01 4D048 AA14 AB01 BA25X BA30X BA31X BA36X BA37X BA38X BA39X CC52 CC53 CD05 4D058 JA14 JB06 JB25 JB39 MA42 PA01 PA08 QA01 QA03 QA11 QA19 SA08 TA06 4G069 AA02 BCAB BCBC BCA BCBC BCBC EA03X EB01

Claims (13)

[Claims] 1. A housing provided with an inlet-side exhaust pipe through which exhaust gas from an engine flows and an outlet-side exhaust pipe through which the purified exhaust gas flows out, and contained in the exhaust gas disposed in the housing. In a diesel particulate filter device for collecting and heating and burning the particulate matter by a filter, the filter comprises a heater wire positioned upstream of the exhaust gas flow, a first nonwoven fabric laminated with a ceramic fiber material, and a combustion temperature. A catalyst layer made of a metal material having a catalytic function to reduce the temperature, a second nonwoven fabric laminated with a ceramic fiber material, and a holding wire mesh made of a heat-resistant metal wire are sequentially laminated, and the catalyst layer is interposed with the second nonwoven fabric. A trapping amount detection device having an electrode provided between the electrode and the holding wire mesh, a temperature sensor for detecting the temperature of the filter, Control for heating the filter and heating and burning the particulate matter in response to information whose electric resistance value is equal to or less than a predetermined value and / or information that the temperature of the filter is equal to or less than a predetermined value. A diesel particulate filter device comprising a controller for performing the following. 2. The filter according to claim 1, wherein the controller detects the particulate matter when the electric resistance value is equal to or less than the predetermined value and / or elapses a predetermined collection time set by a timer. 2. The method according to claim 1, wherein the heater wire and / or the catalyst layer is energized assuming that the substance reaches a predetermined trapping amount, and the particulate matter trapped by the filter is heated and incinerated. 2. The diesel particulate filter device according to 1. 3. The controller according to claim 1, wherein the controller is set when the electric resistance value exceeds the predetermined value and / or when a current is supplied to the heater wire and / or the catalyst layer to regenerate the filter. When the predetermined regeneration time elapses, it is determined that the particulate matter trapped in the filter has been heated and incinerated, and the energization between the heater wire and the catalyst layer is stopped. The diesel particulate filter device according to claim 1. 4. At the start of the controller, the amount of the particulate matter deposited on the filter half is checked by the trapping amount detection device provided in each of the filter halves in which the filter is divided into two. When it is detected that the particulate matter has accumulated in the entire area of the filter over the predetermined amount,
The apparatus according to any one of claims 1 to 3, further comprising a device capable of manually switching a regeneration process of the filter.
Item 14. A diesel particulate filter device according to Item 1. 5. The power supplied to the filter for regenerating the filter is supplied by a generator driven by the engine to generate a three-phase current, and the three-phase current supplied to the filter is supplied by the controller. The diesel particulate filter device according to any one of claims 1 to 4, wherein the voltage is controlled by turning on / off the switching relay. 6. A generator driven by the engine for supplying power to the heater and the catalyst layer to generate a three-phase current, wherein the metal wire and / or the catalyst layer of the heater is formed of two or more wires. 3. The method according to claim 1, wherein each of the three phases is divided into three sections, and each phase of the three-phase current is connected to the divided metal wire and / or the divided catalyst layer to generate heat.
The diesel particulate filter device according to any one of claims 1 to 5. 7. A filter is provided upstream of the filter and opposed to the predetermined area of the filter to allow the exhaust gas to flow into a predetermined area of the filter disposed in the housing. The diesel particulate filter device according to any one of claims 1 to 6, further comprising at least two or more exhaust gas inflow passages and an opening / closing valve that opens and closes each of the exhaust gas inflow passages with an actuator. 8. The method according to claim 1, wherein the ceramic fiber material constituting the first nonwoven fabric is a ceramic such as silicon carbide, silicon nitride, alumina, and forsterite. Diesel particulate filter equipment. 9. The ceramic fiber material constituting the second nonwoven fabric is made of ceramics such as silicon carbide, silicon nitride, alumina and forsterite, and the second nonwoven fabric has a higher density than the first nonwoven fabric. The diesel particulate filter device according to any one of claims 1 to 8, wherein the diesel particulate filter device has a structure or a thick structure. 10. The catalyst layer according to claim 1, wherein the catalyst layer is made of a porous metal material and contains Pt, Ni, Cr, Pd and / or Co. Diesel particulate filter equipment. 11. The metal wire constituting the heater wire is composed of Ni, Cr having a catalytic action to lower a combustion temperature.
The diesel particulate filter device according to any one of claims 1 to 10, wherein the diesel particulate filter device is made of an Fe-based metal including the following. 12. A pair of exhaust gas provided opposite to a region where the filter is bisected into a filter half on the upstream side of the filter so that the exhaust gas flows into an exhaust gas purification chamber provided with the filter. A gas inlet, an on-off valve respectively opened and closed by an actuator provided at the exhaust gas inlet, and an air pump for supplying air to the exhaust gas purification chamber for heating and burning the particulate matter; Controlling the opening and closing of the on-off valve in response to the amount of the particulate matter deposited on the filter and the temperature of the filter, and sending air to the regeneration-side filter by the air pump. The diesel particulate filter device according to any one of claims 1 to 11, comprising: Place. 13. When the particulate matter collected in the filter half corresponding to one of the exhaust gas inlets reaches a predetermined amount, the on / off valve is closed and the air pump is operated. The particulate matter trapped in the filter half is heated and incinerated, and the on-off valve provided at the other exhaust gas inlet is opened to allow exhaust gas to flow and the filter half is allowed to flow through the filter half. 13. The diesel particulate filter device according to claim 12, comprising collecting particulate matter.