JP2990956B2 - Vehicle mounted structure of the exhaust particulate removal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting an exhaust particulate removing device on a vehicle, and more particularly, to collecting and removing particulates, which are exhaust particulates contained in exhaust gas of a diesel engine. The present invention relates to an on-vehicle structure of an exhaust particulate removal device capable of recycling.

[0002]

2. Description of the Related Art Exhaust gas from an internal combustion engine such as an automobile, particularly a diesel engine contains exhaust particulates mainly composed of carbon, which causes black smoke. From the viewpoint of environmental pollution, it is desirable to remove these particulates. In recent years, it has been proposed to dispose an exhaust particulate removing device in an exhaust passage of a diesel engine and remove the diesel particulates by the exhaust particulate removing device. I have.

[0003] Such a device for removing exhaust particulates of a diesel engine generally has a structure in which a particulate filter having a honeycomb-shaped partition wall made of a porous material such as ceramic is supported in its case. After passing through the filter, the particulates in the exhaust gas are collected on the wall surface of the filter, and only the exhaust gas from which the particulates have been removed is discharged to the atmosphere.

[0004] In the exhaust particulate removing device configured as described above, when the amount of particulates trapped inside the particulate filter increases with the use of the particulate filter, air permeability gradually decreases due to the trapped particulates. As a result, engine performance will be reduced. For this reason, the exhaust particulate removing device periodically burns and removes the particulates collected in the particulate filter to regenerate the filter. A burner may be used to ignite the particulates in such a regeneration process, but it is general to energize an electric heater provided at the end of the particulate filter to ignite the particulates. During the regeneration process, a regeneration gas, for example, secondary air, is supplied to the particulate filter to continue burning the particulates.

Regarding such a filter regeneration process, Japanese Utility Model Laid-Open Publication No. Hei 3-10017 discloses a filter for collecting particulates disposed immediately after a driving wheel at a rear portion of a vehicle, and an exhaust passage upstream of the particulate filter. An apparatus is disclosed in which an on-off valve is provided in the air supply pipe, an air supply pipe is attached between the filter and the filter, and hot air is sent from the air supply pipe when the vehicle stops to regenerate the filter.

[0006]

SUMMARY OF THE INVENTION
As disclosed in Japanese Patent No. 10017, an exhaust particulate removing device is disposed immediately after a driving wheel, and a filter regeneration process is performed even while the vehicle is running. Water, mud, snow, and the like are easily applied to the filter. If water or mud is applied to the filter during regeneration, the outer peripheral portion of the filter is cooled, and the temperature difference between the high-temperature central portion and the outer peripheral portion of the burning filter increases. The filter could be damaged.

Therefore, the present invention solves the above-mentioned problems of the conventional exhaust particulate removing apparatus for an internal combustion engine, and performs a regeneration process even during traveling when the regeneration timing comes during traveling of the vehicle. It is an object of the present invention to provide a vehicle mounting structure of an exhaust particulate removing device in which a filter is disposed at a position where splash water, mud, and the like from driving wheels during traveling of the vehicle are less likely to be applied to the filter.

[0008]

According to a first aspect of the present invention, there is provided a particulate filter for collecting particulates contained in exhaust gas of an internal combustion engine. And an exhaust particle removing device mounted on the vehicle, the filter being capable of regenerating the filter even in a running state of the vehicle. When the vehicle is driven by a rear wheel, the exhaust particle removing device is disposed between a front wheel and a rear wheel. A removal device is provided, and in the case of front wheel drive, the exhaust particulate removal device is provided at a rear portion of a rear wheel.

According to a second aspect of the present invention, there is provided a vehicle-mounted structure of an exhaust particulate removing apparatus according to the present invention, which includes a particulate filter for collecting particulates contained in exhaust gas of an internal combustion engine. A structure for mounting an exhaust particulate removing device mounted on a vehicle that enables regeneration of the filter even in a running state of the vehicle, wherein when the exhaust particulate removing device is installed behind driving wheels of the vehicle, the installation position is set to the drive position. It is characterized by being offset to the inside of the vehicle, avoiding immediately after the wheel.

[0010] Further, a third embodiment of the vehicle-mounted structure of the exhaust particulate removing apparatus according to the present invention that achieves the above object is provided with a particulate filter for collecting particulates contained in exhaust gas of an internal combustion engine. A mounting structure for an exhaust particulate removing device that enables regeneration of the filter even in a running state of the vehicle, wherein the exhaust particulate removing device is mounted on a frame of the vehicle when the vehicle includes a vehicle entrance and a fuel tank. On the other hand, the fuel tank is mounted on the side opposite to the side on which the fuel tank is mounted, and is mounted on a portion immediately after the entrance.

[0011]

According to the first aspect of the vehicle mounted structure of the exhaust particulate removing device of the present invention, when the vehicle is driven by the rear wheels, the exhaust particulate removing device is disposed between the front wheels and the rear wheels, and the front wheels are driven. In this case, since the exhaust particulate removal device is located at the rear of the rear wheel,
Bouncing water and mud from the drive wheels during running of the vehicle are less likely to be applied to the filter, and damage to the filter during regeneration is prevented.

Further, according to the second aspect of the vehicle mounted structure of the exhaust particulate removing device of the present invention, when the exhaust particulate removing device is installed behind the driving wheel of the vehicle, the installation position is set immediately after the driving wheel. Avoided and offset to the inside of the vehicle,
Bouncing water and mud from the drive wheels during running of the vehicle are less likely to be applied to the filter, and damage to the filter during regeneration is prevented. Further, the third structure of the vehicle-mounted structure of the exhaust particulate removal device of the present invention is provided.
According to the aspect of the invention, when the vehicle has a boarding opening and a fuel tank, the exhaust particulate removing device is mounted on the side opposite to the mounting side of the fuel tank with respect to the frame of the vehicle, and mounted on a portion immediately after the boarding opening As a result, the entry port serves as a cover for the filter, so that splashing water or mud from the driving wheels while the vehicle is running is less likely to be applied to the filter, and damage to the filter during regeneration is prevented. Further, since the fuel tank and the filter are arranged separately on both sides of the vehicle, the weight balance is maintained, and the running stability of the vehicle is improved.

[0013]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 2 shows an appearance of a vehicle 70 for explaining a vehicle mounting structure of the exhaust particulate removing device of the present invention. One embodiment of the mounting position of the exhaust particulate removing device 10 is a part of the vehicle 70 cut away. Shown. A vehicle 70 shown in this embodiment is a rear-wheel-drive riding vehicle, and a doorway 73 is provided between a front wheel 71 and a rear wheel 72. Therefore, in this embodiment, the exhaust particulate removing device 10 is
It is arranged under the floor between the rear wheel 1 and the rear wheel 72 and at the rear of the entrance 73.

FIG. 1 is a perspective plan view of the vehicle 70 shown in FIG. 2, which shows the vehicle-mounted structure of the exhaust particulate removing device of the present invention in more detail, and shows the exhaust particulate removing device shown in FIG. Only the parts relevant to 10 are shown. In FIG. 1, reference numeral 60 denotes a vehicle body frame provided in parallel to the front-rear direction of the vehicle 70, and a diesel engine 61 is mounted between two vehicle body frames 60 on the front side of the vehicle 70. On the right side of the body frame, a front wheel 71 and a rear wheel 72
Two fuel tanks 62 are mounted in a position between the two. On the other hand, a battery 63 is mounted on the left side of the body frame 60 at a position between the front wheel 71 and the entrance 73. Further, since the vehicle 70 is driven by the rear wheels as described above, the driving force of the diesel engine 61 is transmitted to the differential gear 65 by the propeller shaft 64 disposed between the two frames 60, and the rear wheels 72 are driven. Driven. 66 is an exhaust pipe of the engine 61, and 67 is a muffler provided in the middle of the exhaust space 66.

An exhaust particulate removing apparatus 10 incorporating a particulate filter in a vehicle 70 having the above-described configuration.
When arranging, it is necessary to consider the following conditions. (1) In order to prevent cooling of the outer periphery of the filter during regeneration, make sure that the traveling wind of the vehicle does not hit as much as possible. (2) To prevent disconnection of valves and electric systems provided in the equipment, (3) If the built-in filter breaks for any reason, the fragments will not be scattered by the exhaust gas into the atmosphere.
(4) Since the power consumption of the battery by the heater at the time of filter regeneration is large, the distance between the battery and the heater must not be large. (5) When the secondary air is supplied at the time of filter regeneration,
(6) that the amount of particulates in the exhaust gas does not change suddenly, (7) that the inspection and maintenance of the exhaust particulate removal device is easy, and (8) ) Since the exhaust particulate removal device is heavy, the weight balance of the vehicle does not change significantly when it is attached to the vehicle.

Taking these conditions into consideration, in the embodiment shown in FIG. 1, since the vehicle 70 is provided with a rear-wheel-drive entry port 73, the exhaust particulate removing apparatus 10 is constructed as shown in FIG. It was placed in a position like (a) the front side of the drive wheel 72, and (b) the middle of the exhaust pipe on the upstream side of the muffler 67, and (c) the outside of the vehicle frame on the side opposite to the mounting side of the fuel tank 62, and (d) Boarding gate 73
Behind.

In the exhaust particulate removing apparatus 10 of this embodiment, when the collected particulates are ignited in the regeneration process, an electric heater provided at the end of the particulate filter is energized. Therefore, in addition to the above arrangement conditions, in the exhaust particulate removing apparatus 10 of this embodiment, power is supplied from the battery 63 via a control device 20 having a built-in semiconductor relay and the like as a thick line. Further, in this embodiment, an S-shaped exhaust pipe 66 is connected to the exhaust outlet side of the exhaust particulate removing device 10 so as to guide the exhaust gas to the muffler 67. Further, in this embodiment, the air cleaner 21 and the air pump 22 necessary for supplying the secondary air during the regeneration of the exhaust particulate removing device 10 are attached to the vehicle body frame 60 on the rear side of the exhaust particulate removing device 10 on the vehicle. .

Next, as described above, the exhaust particulate removing apparatus 1
The advantage of arranging 0 will be described. First,
By disposing the exhaust particulate removing device 10 in front of the drive wheels 72 in (a) and (d) and behind the entrance 73, the water, mud, and stones jumped up by the drive wheels 72 remove the exhaust particulates. Since it becomes difficult to hit the device 10 and the traveling wind, it is possible to avoid disconnection of the valve and the electric system due to a jumping-up object, and it is difficult to cool the outer peripheral portion of the filter during regeneration. No cracks occur. Further, foreign matter is prevented from entering the air intake of the air cleaner 21 that supplies the secondary air at the time of filter regeneration, and the reliability at the time of regeneration is increased. Since the exhaust particulate removing device 10 and the battery 63 are provided close to each other with the entrance 73 interposed therebetween, the wiring distance between the battery 63 and the exhaust particulate removing device 10 is reduced, and the degree of voltage drop is also reduced. Less.

Next, by providing the exhaust particulate removing device 10 in the exhaust pipe on the upstream side of the muffler 67 in (b), for example, when the exhaust particulate removal device 10 is disposed on the downstream side of the muffler 67, the volume inside the muffler 67 is reduced. The separated particulates are separated from the wall during engine racing and high rotation and scattered, and are temporarily collected in a large amount by the particulate filter. The occurrence of abnormal combustion or unburned residue due to the bias is prevented.

Further, by arranging the exhaust particulate removing device 10 on the outside of the vehicle frame on the side opposite to the side where the fuel tank 62 is mounted (c), maintenance and inspection of the system can be easily performed. Exhaust particulate removal device 10 on the side
As a result, the weight of the vehicle can be balanced, and there is no risk of fire due to ignition of the fuel in the fuel tank 62 due to heat during regeneration.

The exhaust pipe 66 between the exhaust outlet of the exhaust particulate removing device 10 and the muffler 67 is formed in an S-shape, so that if the built-in filter is broken for any reason, the fragments are exhausted by the exhaust gas. Even if it goes out of the particle removing device 10, a part of the exhaust gas accumulates on the curved portion of the S-shaped tube, and it is difficult to scatter into the atmosphere. In this case, a concave portion in which fragments are easily accumulated may be provided in the curved portion of the S-shaped tube.

In the embodiment described above, the rear-wheel drive vehicle 7 is used.
0, the structure of the exhaust particle removing device 10 mounted on a vehicle of another driving system will be described with reference to FIGS. 3 and 4. FIG. The same members as those described in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted. FIG. 3 shows an example of a mounting structure of the exhaust particulate removing device 10 in a front-wheel drive vehicle 70 '. Thus, the diesel engine 61 is placed in front of the front wheel 71 and the front wheel 7
In the case of a front-wheel drive vehicle 70 ′ in which the vehicle 1 is driven, the exhaust particulate removal device 10 may be disposed in the exhaust pipe 66 on the upstream side of the muffler 67 at the rear of the rear wheel 72 which is not the drive wheel.

4 shows an example of a mounting structure of the exhaust particulate removing device 10 in a four-wheel drive vehicle 70 ". In this manner, the diesel engine 61 is placed in front of the front wheel 71, and the front wheel 71 is mounted. In the case of a four-wheel drive vehicle 70 ″ that is driven and the rear wheel 72 is also driven by the propeller shaft 64, the exhaust particulate removal device 10 includes an exhaust pipe upstream of the muffler 67 between the front wheel 71 and the rear wheel 72. The front wheel 71 is also a drive wheel, but in this case, the installation position may be offset to the inside of the vehicle, avoiding the position immediately after the front wheel 71. FIG.
The same mounting structure as that shown in FIG. 4 can be adopted also in the front-wheel drive vehicle 70 '.

[0024]

As described above, according to the present invention,
When the vehicle is driven by rear wheels, an exhaust particulate removal device is disposed between the front wheels and the rear wheels. When the vehicle is driven by front wheels, the exhaust particulate removal device is disposed behind the rear wheels. Water and mud splashing from the filter are less likely to be applied to the filter, and damage to the filter during regeneration is prevented.

When the exhaust particulate removing device is installed behind the driving wheels of the vehicle, the device is disposed at a position offset from immediately after the driving wheels, so that splashing water and mud from the driving wheels while the vehicle is running are filtered. , And damage to the filter during regeneration is prevented. Further, when the vehicle has a boarding opening and a fuel tank, the exhaust particulate removing device is mounted on the opposite side of the vehicle from the mounting side of the fuel tank with respect to the frame of the vehicle, and is mounted at a position immediately after the boarding opening. The mouth serves as a cover for the filter, so that splashing water and mud from the driving wheels during traveling of the vehicle are less likely to be applied to the filter, and damage to the filter during regeneration is prevented. Further, since the fuel tank and the filter are arranged separately on both sides of the vehicle, the weight balance is maintained, and the running stability of the vehicle is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an essential part of a vehicle, showing one embodiment of a vehicle mounting structure of an exhaust particulate removal device of the present invention.

FIG. 2 is a partially cutaway perspective view showing a mounting position of the exhaust particulate removing device on a vehicle in a vehicle mounting structure of the exhaust particulate removing device of the present invention.

FIG. 3 is an explanatory view showing one embodiment of a vehicle mounting structure of the exhaust particulate removal device of the present invention in a front-wheel drive vehicle.

FIG. 4 is an explanatory view showing one embodiment of a vehicle mounting structure of the exhaust particulate removal device of the present invention in a four-wheel drive vehicle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Exhaust particulate removing device 20 ... Control device 21 ... Air cleaner 22 ... Air pump 60 ... Body frame 61 ... Diesel engine 62 ... Fuel tank 63 ... Battery 66 ... Exhaust pipe 67 ... Muffler 70 ... Equipped with the exhaust particulate removing device of the present invention. Vehicle 71 ... front wheel 72 ... rear wheel 73 ... entrance

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F01N 3/02 301-341 F01N 7/00 B60K 13/04

Claims (3)

(57) [Claims] 1. A structure for mounting an exhaust particulate removing device in a vehicle, including a particulate filter for collecting particulates contained in exhaust gas of an internal combustion engine and enabling regeneration of the filter even in a running state of the vehicle. When the vehicle is driven by rear wheels, the exhaust particle removing device is disposed between the front wheels and the rear wheels, and when the vehicle is driven by front wheels, the exhaust particle removing device is disposed at the rear of the rear wheels. Vehicle mounted structure of the exhaust particulate removal device. 2. A structure for mounting an exhaust particulate removing device in a vehicle, including a particulate filter for collecting particulates contained in exhaust gas of an internal combustion engine and enabling regeneration of the filter even in a running state of the vehicle. When the exhaust particulate removing device is installed behind a driving wheel of a vehicle, the installation position is offset immediately inside the vehicle, avoiding immediately after the driving wheel, and the vehicle of the exhaust particulate removing device is characterized in that: Mounting structure. 3. A structure for mounting an exhaust particulate removing device in a vehicle, including a particulate filter for collecting particulates contained in exhaust gas of an internal combustion engine and enabling regeneration of the filter even in a running state of the vehicle. In the case where the vehicle includes a boarding port and a fuel tank, the exhaust particulate removing device is mounted on a side opposite to a mounting side of the fuel tank with respect to a frame of the vehicle, and a portion immediately after the boarding port. A vehicle-mounted structure of an exhaust particulate removal device, which is mounted on a vehicle.