JPH0663818U - Exhaust gas purification device mounting structure for vehicles - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to facilitate installation of an exhaust gas purification device such as a catalyst device or a particulate trap filter device in a vehicle having a short wheelbase. [Structure] A muffler 4 and a catalyst device 5 are arranged in parallel, and a vehicle body mounting portion fixedly mounted to a frame 6, a muffler holding portion and a catalyst device holding portion for suspending and holding the muffler 4 and the catalyst device 5, respectively. The mounting member 7 having the structure described above is provided, and the mounting device 7 collectively mounts the muffler 4 and the catalyst device 5 on the frame 6 through the mounting member 7. Since the exhaust pipe length between the muffler 4 and the catalyst device 5 is shortened by attaching the catalyst device 5 to the frame 6, the catalyst device 5 can be easily attached even in a truck with a short wheelbase. In addition, the mounting workability is further improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mounting structure for an exhaust gas purification device such as a particulate catalyst device or a particulate trap filter device in a vehicle, and more particularly to a technique for facilitating the mounting of the exhaust gas purification device in a vehicle having a short wheelbase.

[0002]

[Prior art]

 In a diesel engine installed in a vehicle such as a truck, an exhaust purification device such as a catalyst device or a particulate trap filter device for purifying soluble organic components (SOF) contained in the particulate matter in the exhaust gas is installed in the exhaust passage on the upstream side of the muffler. (See Japanese Utility Model Laid-Open No. 64-56516, etc.).

[0003]

[Problems to be solved by the device]

 However, in the conventional exhaust purification device mounting structure, since the muffler and the exhaust purification device are laid out in a straight line in the exhaust passage, the length of the exhaust passage muffler and the interposed portion of the exhaust purification device becomes long. In vehicles with a short wheelbase, it was extremely difficult to install an exhaust gas purification device.

Incidentally, the present applicant first made the particulate trap filter device and the muffler as close to each other as possible and attached them to the frame with connecting pipes for both, thereby shortening the overall length, We have proposed a technology that allows a filter device to be easily mounted on a vehicle with a short wheelbase (see Japanese Utility Model Application No. 4-31768). In view of the above conventional problems, the present invention has an object of further facilitating mounting of an exhaust emission control device such as a catalyst device or a particulate trap filter device in a vehicle having a short wheel base. To do.

[0005]

[Means for Solving the Problems]

 Therefore, the present invention is a mounting structure of an exhaust gas purification device installed upstream of a muffler in an exhaust passage of an engine mounted on a vehicle, wherein the muffler is provided with an inlet portion and an outlet portion on one end face. The exhaust gas purifying device is arranged in parallel to connect the outlet part of the exhaust gas purifying device and the inlet part of the muffler, and a vehicle body mounting part fixedly mounted to the vehicle body, A mounting member having a muffler holding portion and an exhaust purification device holding portion for suspending and holding the muffler and the exhaust purification device, respectively, is provided, and the muffler and the exhaust purification device are collectively attached to the vehicle body by the mounting member.

[0006]

[Action]

 In such a configuration, by arranging the muffler and the exhaust gas purification device in parallel, the length between the muffler and the exhaust gas purification device can be shortened, and the exhaust gas purification device can be easily installed even in a vehicle with a short wheelbase. Can be done. Also, the mounting member allows the muffler and the exhaust emission control device to be mounted together on the vehicle body, thus improving the mounting property.

[0007]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In FIG. 3, a muffler 4 is interposed in an exhaust pipe 3 which constitutes an exhaust passage of an engine 2 mounted on a truck 1, and a particulate catalyst device (hereinafter, referred to as an exhaust purification device) on an upstream side of the muffler 4 as an exhaust purification device. 5 is abbreviated as a catalyst device.

Here, the muffler 4 is configured to include an inlet portion 4a and an outlet portion 4b on one end surface of its main body. The muffler 4 and the catalyst device 5 are arranged in parallel with the muffler 4 inside and the catalyst device 5 outside. The exhaust port of the engine 2 and the inlet part of the catalyst device 5 are connected to each other via an exhaust pipe 3A that extends from the exhaust port to the outside of the truck 1 and then linearly extends along the frame 6 behind the truck 1. . The outlet portion of the catalyst device 5 and the inlet portion 4a of the muffler 4 are connected via an exhaust pipe 3B curved in a substantially U shape. An exhaust pipe 3C is connected to the outlet portion 4b of the muffler 4. The exhaust pipe 3C extends rearward of the truck 1 and is curved forward and further obliquely extends outward of the truck 1. The tip of the exhaust pipe 3C is directed slightly rearward from the outer side of the frame 6.

The catalyst device 5 and the muffler 4 are collectively attached to the frame 6 via a mounting member. This mounting member is configured as follows. That is, in FIG. 1 and FIG. 2, the attachment member 7 includes a vehicle body attachment portion fixedly attached to the frame 6, a muffler holding portion and a catalyst device holding portion for suspending and holding the muffler 4 and the catalyst device 5, respectively. And a pair is provided in this embodiment.

The vehicle body mounting portion of each mounting member 7 is connected to a substantially L-shaped first mounting bracket 8, a substantially horizontal plate portion 9a, and one end of the plate portion 9a, and extends vertically downward. The second mounting bracket 9 has a plate portion 9b extending in the same direction as the rear plate portion 9a and extending obliquely downward. One end of the first mounting bracket 8 is fastened to the inner surface of the frame 6 by a fastener 10 such as a bolt and nut, and the other end is fastened by a fastener 11 such as a bolt and nut to the plate portion of the second mounting bracket 9. It is fastened to the tip of 9a. In this case, an elastic body 12 such as rubber is provided on the fastening surface between the first mounting bracket 8 and the second mounting bracket 9.

The muffler holding portion of each mounting member 7 is composed of a substantially U-shaped holding bracket 13 wound around a substantially half circumference of the muffler 4. The holding bracket 13 penetrates both ends of the holding bracket 13 from the lower side to two spaced positions of the plate portion 9b of the mounting bracket 9, and the nuts 14 are fitted to the male screw portions 13a formed on the outer peripheral surfaces of the both ends. As a result, it is connected to the mounting bracket 9.

The catalyst device holding portion of each mounting member 7 is composed of a cylindrical member 15 fitted to the outer peripheral surface of the exhaust pipe 3 A at the inlet portion of the catalyst device 5, and the cylindrical member 15 is mounted on the mounting bracket 9. It is provided at the lower end of the plate portion 9b and is formed integrally with the mounting bracket 9, or is formed separately from the mounting bracket 9 and fixed to the mounting bracket by welding or the like.

On the other hand, the exhaust pipe 3 C connected to the outlet portion 4 b of the muffler 4 is attached to the frame 6 by the exhaust pipe attachment member 16. The mounting member 16 is a cylindrical portion that is integrally formed with the first mounting bracket 17 having a substantially L shape, the substantially L-shaped plate portion 18a and the plate portion 18b, and is fitted to the outer peripheral surface of the exhaust pipe 3C. 18b and a second mounting bracket 18 having.

One end of the first mounting bracket 17 is fastened to the inner surface of the frame 6 by a fastener 19 such as a bolt and nut, and the other end is fastened to the second mounting bracket 18 by a fastener 20 such as a bolt and nut. Is fastened to the tip of the plate portion 18a. In this case, an elastic body 21 such as rubber is provided on the fastening surface between the first mounting bracket 17 and the second mounting bracket 18.

According to such a configuration, by arranging the muffler 4 and the catalyst device 5 in parallel, the exhaust pipe length between the muffler 4 and the catalyst device 5 can be shortened, and the catalyst can be used even in a truck with a short wheelbase. The device 5 can be easily attached. Further, a mounting member 7 having a vehicle body mounting portion fixedly mounted on the frame 6, a muffler holding portion for suspending and holding the muffler 4 and the catalyst device 5 and a catalyst device holding portion is provided. Since the muffler 4 and the catalyst device 5 are collectively attached to the frame 6 by the member 7, there is no need to separately attach the muffler 4 and the catalyst device 5, and the muffler 4 and the catalyst device 5 can be easily attached to the frame 6, Good mounting workability.

As described above, the present invention has been described with reference to the specific embodiments, but the present invention is not limited to this, and those skilled in the art can apply the present invention to the present invention. It should be noted that various changes and modifications can be made without departing from the scope of the attached utility model registration request.

[0017]

[Effect of device]

 As described above, according to the exhaust gas purifying apparatus mounting structure of the present invention, the muffler and the exhaust gas purifying apparatus are arranged in parallel, and the muffler and the exhaust gas purifying apparatus are collectively mounted on the vehicle body by the mounting member having a unique configuration. Since it is mounted on the vehicle, the length between the muffler and the exhaust gas purification device can be shortened, and the exhaust gas purification device can be easily installed even in a vehicle with a short wheelbase, and the installation property can be improved. The practical effect is great.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a structure for mounting an exhaust emission control device according to the present invention.

FIG. 2 is a view on arrow A in FIG.

FIG. 3 is a plan view showing an implementation state of the truck of the above embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 truck 2 engine 3 exhaust pipe 4 muffler 4a inlet part 4b outlet part 5 catalyst device 6 frame 7 mounting member 8 first mounting bracket 9 second mounting bracket 13 holding bracket 15 cylindrical member

Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location F01N 3/28 301 V 7/08 D

Claims (1)

[Scope of utility model registration request] 1. A mounting structure for an exhaust gas purification device, which is interposed upstream of a muffler in an exhaust passage of an engine mounted on a vehicle, wherein the muffler is provided with an inlet portion and an outlet portion on one end surface. The muffler and the exhaust gas purification device are arranged in parallel to connect the outlet part of the exhaust gas purification device and the inlet part of the muffler, while the vehicle body mounting part fixedly attached to the vehicle body, the muffler and the exhaust gas purification device. A vehicle characterized in that a mounting member having a muffler holding portion and an exhaust gas purification device holding portion for suspending and holding each of the devices is provided, and the muffler and the exhaust gas purification device are collectively attached to the vehicle body by the mounting member. Exhaust gas purification device mounting structure.