JPH1199835A - Rear engine bus - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To suppress the transmission of vibration from an engine to a muffler and increase the space inside a vehicle in front of the engine in a rear engine bus in which an engine is installed in the front-rear direction of a vehicle body. SOLUTION: In a rear engine bus, a V-type engine 1 is installed in the front-rear direction of a vehicle body, and a muffler 2 is arranged along a side surface of the V-type engine 1 so as to be inclined forward and downward, and a front surface of the V-type engine 1 is provided. A bellows pipe 10 extending vertically is interposed at an intermediate portion of each exhaust pipe 4 extending vertically.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear engine bus in which an engine is installed in a longitudinal direction of a vehicle body and a muffler is arranged along a side of the engine.

[0002]

2. Description of the Related Art In a conventional rear engine bus, as shown in FIGS. 4 and 5, a V-type engine 1 is installed in a front-rear direction of a vehicle body, and a V-type engine 1 is arranged in a front-rear direction along a side surface of the engine 1. A muffler 2 is arranged, and exhaust pipes 4, 4 extend downward from the front surface of each bank 3, 3 in the engine 1, and are further provided at the front end of the muffler 2 via bellows pipes 5, 5 arranged horizontally, respectively. Are linked.

However, each bank 3 of the engine 1
3 is mainly centered on the crankshaft, and arrow A in FIG.
Therefore, each exhaust pipe 4 vibrates almost vertically with respect to the muffler 2 attached to the vehicle frame or the like. However, the main vibration direction of each exhaust pipe 4 and each bellows pipe 5
Therefore, the vibration absorption characteristics of the exhaust pipes 4 by the bellows pipes 5 were not necessarily good.

On the other hand, the muffler 2 is relatively large in order to prevent noise in the bus, and since the bellows pipes 5 between the exhaust pipes 4 and the muffler 2 are arranged horizontally, each exhaust pipe is 4 has a relatively large extension in front of the engine 1, so that the trunk room 7 installed between the rear wheel 6 and the engine 1 is inevitably narrowed in the longitudinal direction of the vehicle body.

[0005]

SUMMARY OF THE INVENTION The present invention suppresses the transmission of vibration from an engine to a muffler in a rear engine bus in which an engine is installed in the front-rear direction of a vehicle body and a muffler is arranged along the side of the engine. In addition, the interior space in front of the engine is to be enlarged.

[0006]

Therefore, a rear engine bus according to the present invention is provided with an engine installed in the front-rear direction of a vehicle body, a muffler arranged obliquely forward and downward along the side of the engine, An exhaust pipe extending vertically along the front surface of the muffler and connected to a front end of the muffler, and a bellows pipe extending vertically extending through an intermediate portion of the exhaust pipe.

That is, since a bellows pipe extending vertically is interposed at an intermediate portion of an exhaust pipe connected to a front end of a muffler and extending vertically along a front surface of an engine installed in a longitudinal direction of a vehicle body. Vertical vibration of the exhaust pipe with respect to the muffler attached to the vehicle frame etc. can be efficiently absorbed by the bellows pipe, the interior space in front of the engine can be easily expanded, and the muffler extends along the side of the engine. Since it is arranged to be inclined forward and downward, the vertical height of the exhaust pipe connected to the front end of the muffler is secured large, and a bellows pipe extending vertically can be easily interposed in the middle part of the exhaust pipe. become able to.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a first embodiment of the present invention. 1 and 2, the V-type engine 1 of the rear engine bus is installed in the front-rear direction of the vehicle body, while the muffler 2 is arranged along the side surface of the engine 1 so as to be inclined forward and downward. Exhaust pipes 4, 4 extending from the front face of each bank 3, 3 extend vertically along the front face of the engine 1, respectively.
The bellows tubes 10, 10 extending up and down, respectively, are interposed in the middle portions of the bellows.

Further, as shown in FIG. 3, a plate 13 is fixed to the end of exhaust introduction pipes 12, 12 extending forward from the end plate 11 of the muffler 2, and the rear end of each exhaust pipe 4 is Each of the exhaust pipes 4 is connected to each of the exhaust introduction pipes 12 by being bolted to the plate 13. The end plates 11 and the plates 13 are connected to each other by the band plates 14 and reinforced, and the end plates 11 are connected to each other. Is configured to reduce the stress that occurs in

In the above-mentioned apparatus, the bellows pipes 10, 1 extending vertically are respectively provided at the intermediate portions of the exhaust pipes 4 extending vertically.
The vertical vibration generated in each exhaust pipe 4 by the operation of the engine 1 with respect to the muffler 2 attached to the vehicle frame or the like can be efficiently absorbed by each bellows pipe 10 because the zeros are interposed. Further, since noise caused by vibration can be easily reduced, the life of exhaust system components in the rear engine bus can be significantly improved.

Since the bellows pipes 10 extending vertically are interposed in the middle part of the exhaust pipes 4 extending vertically, the muffler 2 is relatively large in order to improve the riding comfort in the rear engine bus. Even if there is, each exhaust pipe 4 can easily be prevented from greatly projecting forward from the engine 1, and therefore, the trunk room 7 installed between the rear wheel 6 and the engine 1 is set to be wider in the front-rear direction of the vehicle body. This is particularly effective in sightseeing buses requiring a large capacity trunk room.

Further, since the muffler 2 is arranged to be inclined forward and downward along the side surface of the engine 1, the vertical height of each exhaust pipe 4 connected to the front end of the muffler 1 can be relatively easily secured. Each of the bellows pipes 10 extending vertically can be interposed in the middle portion of each exhaust pipe 4 without any particular trouble, and at the same time, as shown in FIG. There is an advantage that it can be set to an appropriate size relatively easily.

On a sightseeing bus with a rear engine that travels a long distance, a toilet is provided at the rear of the vehicle body.
Although a sewage tank may be installed between the rear wheel 6 and the engine 1, as described above, a large space in the vehicle longitudinal direction can be set between the rear wheel 6 and the engine 1. By setting a relatively large gap between each of the exhaust pipes 4 having a relatively high temperature and the sewage tank on the front surface of the engine 1 or by installing a sufficient heat insulating material between each of the exhaust pipes 4 and the sewage tank. In addition, there is a special advantage that the heating of the sewage tank by each exhaust pipe 4 can be effectively suppressed, and therefore, the generation of an unpleasant odor accompanying the heating of the sewage tank can be effectively prevented.

[0014]

In the rear engine bus according to the present invention, a bellows pipe extending vertically is interposed at an intermediate portion of the exhaust pipe connected to the front end of the muffler, and the vertical vibration of the exhaust pipe with respect to the muffler is controlled by the bellows pipe. As it can be efficiently absorbed, it is possible to significantly improve the ride comfort, and it is also possible to easily increase the space inside the vehicle in front of the engine and easily increase the capacity of the trunk room etc. necessary for the bus. Because it is possible, it is very convenient.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view of an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part of the embodiment.

3 is an enlarged view of a part of FIG.

FIG. 4 is a schematic longitudinal sectional view of a conventional device.

FIG. 5 is an enlarged perspective view of a main part of the conventional device.

[Explanation of symbols]

 Reference Signs List 1 engine 2 muffler 4 exhaust pipe 6 rear wheel 7 trunk room 10 bellows pipe

Claims (1)

[Claims] An engine installed in a front-rear direction of a vehicle body;
A muffler that is arranged to be inclined forward and downward along the side of the engine, an exhaust pipe that extends vertically along the front surface of the engine and is connected to a front end of the muffler, and is provided at an intermediate portion of the exhaust pipe. Rear engine bus with a bellows tube extending vertically.