JP4353497B2 - Regenerative diesel particulate filter mounting structure - Google Patents

Regenerative diesel particulate filter mounting structure Download PDF

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Publication number
JP4353497B2
JP4353497B2 JP2001204469A JP2001204469A JP4353497B2 JP 4353497 B2 JP4353497 B2 JP 4353497B2 JP 2001204469 A JP2001204469 A JP 2001204469A JP 2001204469 A JP2001204469 A JP 2001204469A JP 4353497 B2 JP4353497 B2 JP 4353497B2
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Japan
Prior art keywords
diesel particulate
pipe
particulate filter
vehicle
branch pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2001204469A
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Japanese (ja)
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JP2003020931A (en
Inventor
場 浩 司 大
Original Assignee
日産ディーゼル工業株式会社
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Publication of JP2003020931A publication Critical patent/JP2003020931A/en
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Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure for mounting a plurality of diesel particulate filters to a vehicle in a vehicle equipped with a diesel engine having a plurality of diesel particulate filters.
[0002]
[Prior art]
In Japan, most commercial vehicles such as trucks and buses are equipped with diesel engines with high thermal efficiency.
On the other hand, in recent years, air pollution around major trunk roads in urban areas has become an increasingly serious social problem, and there is a growing need for low pollution of vehicles.
The diesel engine-equipped vehicle has the advantage of high thermal efficiency, but the exhausted exhaust gas contains NOx harmful to the human body and unregulated substances, so-called “PM” (particulate matter). Have
The NOx reduction can be dealt with by improving the combustion of the engine such as “lowering the combustion temperature”.
On the other hand, “PM” removal is performed by passing exhaust gas through a diesel particulate filter interposed in the middle of the exhaust pipe, so-called “DPF” (hereinafter, the diesel particulate filter is abbreviated as DPF). Once the soot containing "PM" is collected, the soot containing "PM" is burned with a powerful electric heater or burner when a certain amount of soot containing "PM" is collected. ing.
Further, the DPF has a sufficient silencing effect and also serves as a silencer.
[0003]
As the name suggests, the DPF is not yet regulated by law, but in particular for commercial vehicles with high public interest, especially route buses that are means of transportation in the city, against the vehicles already sold for environmental protection. However, instead of the currently installed silencers, so-called “mufflers”, they are increasingly being replaced with DPFs.
[0004]
In addition, a certain amount of soot accumulates in the DPF, and when the soot that is unburned is regenerated by an electric heater or burner, that is, burned, the flow of exhaust gas must be stopped once.
For this purpose, the DPF is mounted in parallel in a plurality of exhaust pipes on the vehicle, and while the DPF is regenerated by stopping the flow of exhaust gas in one DPF and burning the soot, the other DPF is operated. If it does so, it can reproduce | regenerate DPF with driving | running | working and the fall of operation efficiency is prevented.
[0005]
Here, recombination from existing mufflers to existing vehicles (refer to FIG. 7 as a plan view of the rear engine room of a bus equipped with existing mufflers) to DPF, multiple DPFs by individual attachments It is designed to be attached to the vehicle sequentially.
The power supply wiring to each DPF, the input signal line from the clogging sensor, and the air piping to the on-off valve for changing the flow of exhaust gas are performed after all DPFs have been mounted on the vehicle. ing.
[0006]
In other words, DPF recombination to already-sold cars has become a major remodeling work under many restrictions, prolonging the construction period, and greatly reducing the operation rate of the vehicle.
[0007]
[Problems to be solved by the invention]
The present invention has been proposed in view of the above-described conventional problems, and a regenerative diesel particulate that can be recombined easily and in a short period of time when recombining a diesel particulate filter to an existing vehicle. The purpose is to provide a filter mounting structure.
[0008]
[Means for Solving the Problems]
The regenerative diesel particulate filter mounting structure of the present invention is a regenerative diesel particulate filter mounting structure in which a plurality of diesel particulate filters (1A, 1B, 1C) are mounted on a vehicle. The diesel particulate filter (1A, 1B) is fixed to the left and right at the front, and the diesel particulate filter (1C) is fixed at the rear to form a subassembly (100) as a silencer / particulate collection unit. The side connecting pipe (E1) is composed of one main pipe section (E1m), a short branch pipe section (E1a, E1b) branched from the main pipe section (E1m) and a long branch pipe section (E1c), and the short branch Pipe parts (E1a, E1b) are the diesel particulates in the front Connected to the inflow side of the filters (1A and 1B), the long branch pipe part (E1c) is connected to the inflow side of the rear diesel particulate filter (1C), and the discharge side connection pipe (E2) is one It is composed of a merging pipe section (E2m), a long branch pipe section (E2a, E2c) and a short branch pipe section (E2b) that join the merging pipe section (E2m), and the long branch pipe sections (E2a, E2c) are Connected to the discharge side of the front diesel particulate filter (1A and 1B), the long branch pipe (E1c) is connected to the discharge side of the rear diesel particulate filter (1C).
[0009]
According to the mounting structure of the regenerative diesel particulate filter of the present invention having such a configuration, a plurality of diesel particulate filters are subassembled and attached to the vehicle as a single unit. Work can be done.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. In the examples in the present embodiment, three DPFs are replaced with a conventional muffler, that is, a so-called “muffler”, for an already sold vehicle.
In the drawings, the same reference numerals are assigned to the same members to avoid redundant description.
[0019]
1st Embodiment is described based on FIGS. 1-3 with reference to FIG.
In the arrangement in the rear engine room of the bus, which is an already-sold vehicle shown in FIG. 7, the diesel engine EG is located in the center of the rear end, and the exhaust system is an exhaust outlet EM, flexible tube FX, exhaust pipe EP of the engine EG. The exhaust pipe EP is connected to the flange on the inflow side of the muffler 1 attached to the vehicle body by the bracket 3 and the vibration isolating rubber 4 by the flange Ef of the exhaust pipe EP.
A tail tube E5 is inserted into the exhaust side of the muffler 1 and is attached to the vehicle body B by a clamp and a vibration isolating rubber (not shown).
[0020]
In the present embodiment, after the exhaust tube EP is removed from the exhaust system (FIG. 7), a subassembly 100 in which three DPFs are assembled in parallel is assembled in advance, and the subassembly is assembled as shown in FIG. 100 is attached to the vehicle body B by the attaching means described in detail in FIG. FIG. 2 is a side view of FIG.
In FIG. 1, the description of the same components as those in FIG. 7 is omitted.
[0021]
In FIG. 3, straps 3, 3, and 32 are respectively wound around body portions of three DPFs 1 </ b> A, 1 </ b> B, and 1 </ b> C in advance.
On the discharge sides of the three DPFs 1A, 1B, and 1C, on-off valves 61, 62, and 63 having air cylinders 61a, 62a, and 63a that open and close the flow paths of the DPFs are attached in advance by bolts BL.
[0022]
On the other hand, the main bracket 2 has a groove-shaped second member 2b having an opening surface facing downward and a groove-shaped second member 2b having mounting holes 2d drilled at both ends. Is fixed by welding, and a Z-shaped third member 2c having an attachment hole 2e drilled at the end is fixed to the rear end opening surface of the first member 2a by welding.
[0023]
A mounting hole (not shown) is perforated on the side close to the front end of the main bracket 2, and a hat-shaped first sub bracket 21 extends over the top surface of the main bracket 2 in the mounting hole. Mounted by BN.
A mounting hole (not shown) is drilled on the side close to the rear end of the main bracket 2, and a second sub-bracket 23 in which a hat-shaped collar portion jumps upward in the mounting hole is the main bracket 2. It is attached by bolts and nuts BN so as to straddle the upper surface of 2.
[0024]
Then, L-shaped hangers 22 and 22 are attached to the left and right ends of the first sub bracket 21 by bolts and nuts BN so as to be bent downward.
[0025]
In this way, the first and second sub brackets 21 and 23 are attached to the main bracket 2, and the hanger 22 is attached to the first sub bracket 21. , 62, 63 are attached, and the DPFs 1A, 1B, 1C around which the straps 3, 32 are wound are attached, and assembled into the subassembly 100 as an integral unit.
[0026]
On the other hand, as a support member of the subassembly 100, the front side includes a rear chassis frame 51 and a reinforcing member 52 orthogonal to the chassis frame 51 and connected to the vehicle body outer plate B2 via a bracket BB. Suspension fittings 51a and 52a having attachment holes 51d and 52d are welded to the chassis frame 51 and the reinforcing member 52, respectively.
On the rear side, a part 53 of the vehicle body having the mounting hole 53e that supported the reassembled muffler is used as it is.
[0027]
Accordingly, the anti-vibration rubber 4 is positioned by positioning the mounting holes 2d and 2e of the main bracket 2 of the unit (sub-assembly) 100, which has been pre-assembled in advance, in accordance with the mounting holes 51d, 52d and 53e on the chassis side. It may be attached via.
In FIG. 3, arrows FR and RH indicate the front side and the right side of the vehicle, respectively.
[0028]
Alternatively, referring also to FIG. 1, on the inflow side of the plurality of diesel particulate filters 1A, 1B, 1C, there is one main pipe part E1m and three branch pipe parts E1a, E1b, E1c from the main pipe part E1m. The branch pipe portions E1a, E1b, E1c of the inflow side connection pipe E1 having the following may be connected and incorporated in the subassembly 100.
[0029]
Alternatively, referring also to FIG. 1, the number of branch pipe parts E2a, E2b, E2c equal to the number of the plurality of diesel particulate filters and the number of the diesel particulate filters 1A, 1B, 1C on the discharge side The plurality of branch pipes E2a, E2b, E2c of the discharge side connection pipe E2 having the junction pipe part E2m that joins the branch pipe parts into one may be connected and incorporated in the subassembly 100.
[0030]
According to the mounting structure of the regenerative diesel particulate filter of this embodiment having such a configuration, only a unit in which a plurality of DPFs are mounted in advance on one main bracket 2 to form the subassembly 100 is mounted on the vehicle. Therefore, it can be easily and quickly replaced with an existing muffler.
Note that when the existing unit such as the muffler is removed, the inflow side connection pipe E1 and the discharge side connection E2 that are replacement parts may be connected to the subassembly 100 depending on how other units in the engine room are inserted. It may be incorporated.
In addition, in a vehicle equipped with a diesel engine with a small displacement, two DPFs may be used.
[0031]
A second embodiment of the present invention will be described based on FIG.
The plurality of diesel particulate filters 1A, 1B, and 1C include an operating power supply circuit, that is, a “cable that allows a large amount of current to flow through an electric heater built in the filter to burn unburned soot” , WA2; WB1, WB2; WC1, WC2 are connected to each other, and the operating power supply circuits WA1, WA2; WB1, WB2; And connected to the multipolar connector MC at the end of the cable bundle WO. It is desirable that the cable bundle WO is incorporated in the subassembly 100 in advance by extending the length to the multipolar connector MC to a position where it can be easily connected to a vehicle body (not shown).
[0032]
Further, the signal circuits SA, SB, SC connected to the respective clogging sensors (not shown) built in the diesel particulate filters 1A, 1B, 1C are connected to at least a position connected to the harness on the vehicle body side as one harness. It is desirable for assembly (bundling) and assembling the harness assembly into the subassembly 100 for easy and quick recombination.
In FIG. 4, J is a cable connecting means, EH1 to EH3 are ground cables, and HC is a harness clamp.
[0033]
A third embodiment of the present invention will be described with reference to FIGS.
On-off valves 61, 62, and 63 are attached to the outflow sides of the plurality of diesel particulate filters 1A, 1B, and 1C (none of which are shown) to prevent the gas flow that flows through the filter during regeneration. Air cylinders 61a, 61b for opening and closing the on-off valves 61, 62, 63
, 61c, air supply lines t0, t1 to t3 and electromagnetic valves V1 to V3 for turning on and off the air supply are incorporated in the main bracket 2 of the subassembly 100 by tube connectors TC and bolts BL.
[0034]
The time required for recombination can be further shortened by incorporating a large number of accessory parts to the DPF as in the second embodiment (FIG. 4) and the third embodiment (FIGS. 5 and 6).
[0035]
It should be noted that the illustrated embodiment is merely an example, and is not a description to limit the technical scope of the present invention.
[0036]
In addition, in the description of the embodiment, the recombination of the muffler and the DPF is described as an example with respect to the already-sold car, but the same effect is exhibited even when the vehicle is newly manufactured. is there.
[0037]
【The invention's effect】
The effects of the present invention are listed below.
(A) Since only a unit in which a plurality of DPFs are previously mounted on one main bracket and are sub-assembled is attached to the vehicle, recombination work can be facilitated and speeded up.
(B) By incorporating the DPF inflow side connection pipe and the DPF discharge side connection pipe, which are replacement parts, into the subassembly, recombination work can be further facilitated and speeded up.
(C) The construction period can be further shortened by incorporating the power supply circuit, which is an accessory to the DPF, and the signal line of the clogging sensor into the subassembly in advance.
[Brief description of the drawings]
FIG. 1 is a plan view showing a layout and configuration in an engine room according to a first embodiment of the present invention.
FIG. 2 is a side view showing a layout and configuration in an engine room according to the first embodiment of the present invention.
FIG. 3 is a perspective view of a main part of the first embodiment of the present invention.
FIG. 4 is a three-dimensional view showing a second embodiment of the present invention.
FIG. 5 is a plan view showing a third embodiment of the present invention.
FIG. 6 is a side view showing a third embodiment of the present invention.
FIG. 7 is a plan view showing a layout and a configuration in an engine room of a bus equipped with a muffler.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Muffler 1A ... Diesel particulate filter 2 ... Main bracket 3 ... Strap 4 ... Anti-vibration rubber 51 ... Chassis frame 61 ... On-off valve B2 ... Vehicle body outer plate E1 ... Inlet side connecting pipe E2 ... Outlet side connecting pipe

Claims (1)

  1.   In a regenerative diesel particulate filter mounting structure in which a plurality of diesel particulate filters (1A, 1B, 1C) are mounted on a vehicle, the diesel particulate filters (1A, 1B) are arranged on the front of one main bracket (2). The diesel particulate filter (1C) is fixed to the rear part of the sub assembly (100) as a silencer and particulate collection unit, and the inflow side connection pipe (E1) has one main pipe part (E1m ) And a short branch pipe part (E1a, E1b) and a long branch pipe part (E1c) branched from the main pipe part (E1m), and the short branch pipe part (E1a, E1b) is the diesel part of the front part. Connected to the inflow side of the curate filter (1A and 1B), the long branch pipe section (E c) is connected to the inflow side of the rear diesel particulate filter (1C), and the discharge side connecting pipe (E2) joins one merging pipe part (E2m) and the merging pipe part (E2m). It is constituted by a pipe part (E2a, E2c) and a short branch pipe part (E2b), and the long branch pipe part (E2a, E2c) is connected to the discharge side of the front diesel particulate filter (1A and 1B), The regenerative diesel particulate filter mounting structure, wherein the long branch pipe portion (E1c) is connected to a discharge side of the rear diesel particulate filter (1C).
JP2001204469A 2001-07-05 2001-07-05 Regenerative diesel particulate filter mounting structure Expired - Fee Related JP4353497B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001204469A JP4353497B2 (en) 2001-07-05 2001-07-05 Regenerative diesel particulate filter mounting structure

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Application Number Priority Date Filing Date Title
JP2001204469A JP4353497B2 (en) 2001-07-05 2001-07-05 Regenerative diesel particulate filter mounting structure

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JP4353497B2 true JP4353497B2 (en) 2009-10-28

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008136203A1 (en) * 2007-05-01 2008-11-13 Hitachi Construction Machinery Co., Ltd. Construction machine
JP5107822B2 (en) 2008-08-11 2012-12-26 日立建機株式会社 Exhaust gas purification device
WO2010092857A1 (en) * 2009-02-10 2010-08-19 ヤンマー株式会社 Engine device
JP5324952B2 (en) * 2009-02-10 2013-10-23 ヤンマー株式会社 Engine equipment
JP5328024B2 (en) * 2009-02-12 2013-10-30 ヤンマー株式会社 Engine
JP5328023B2 (en) * 2009-02-12 2013-10-30 ヤンマー株式会社 Engine
JP6181631B2 (en) * 2014-11-27 2017-08-16 ヤンマー株式会社 Engine device for work vehicle

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