JP3578815B2 - Exhaust pipe structure for vehicles - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to an exhaust pipe structure for a vehicle that exhausts exhaust gas forward when working at the rear of the vehicle and exhausts exhaust gas backward when traveling on the vehicle. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust pipe structure for a vehicle that does not adversely affect a driver in front of the vehicle and prevents exhaust gas from hitting a rear wheel when the vehicle is running.
[0002]
[Prior art]
According to vehicle security standards, the exhaust pipe of a vehicle is prohibited to be opened except for downward, leftward, and rightward directions. Therefore, the exhaust pipe is generally opened rearward. However, in a vehicle working at the rear of the vehicle, such as a garbage truck, there is a case where an operator easily sucks exhaust gas from an exhaust pipe opened rearward. Therefore, as disclosed in Japanese Utility Model Publication No. 58-5048, exhaust gas is discharged to the front of the vehicle when working at the rear of the vehicle, and exhausted to the rear of the vehicle when the vehicle is running. An exhaust pipe structure has been proposed.
[0003]
In such an exhaust pipe structure, as shown in FIG. 4, the exhaust pipe 2 extending from the muffler 1 is curved, and the end 2a of the exhaust pipe 2 is set to face diagonally forward. An auxiliary exhaust pipe 3 extending rearward is connected to a curved portion of the exhaust pipe 2. The diameter of the auxiliary exhaust pipe 3 is increased toward the rear, so that a suction effect is generated.
[0004]
With this configuration, when the vehicle is stopped, for example, when working at the rear of the vehicle, the exhaust gas flows through the curved exhaust pipe 2 as shown by a broken line in FIG. Is discharged obliquely forward, thereby preventing adverse effects on the workers at the rear of the vehicle.
[0005]
On the other hand, when the vehicle starts running, as shown by a solid line in FIG. 4, air is taken into the auxiliary exhaust pipe 3 from the end 2 a of the exhaust pipe 2 by the suction effect of the auxiliary exhaust pipe 3. As a result, the exhaust gas flowing through the exhaust pipe 2 curved by the ram pressure applied to the opening of the auxiliary exhaust pipe 3 is sucked into the auxiliary exhaust pipe 3, and the exhaust gas is caused to flow backward of the vehicle. Thereby, the security standards of the vehicle are satisfied.
[0006]
[Problems to be solved by the invention]
By the way, when the garbage truck is stopped and cargo handling work is performed, the rotation speed of the engine is increased, and the speed and amount of exhaust gas are significantly increased as compared with normal times. Therefore, in the exhaust pipe structure disclosed in the above-mentioned publication, the exhaust gas flows toward the front of the vehicle, so that the exhaust gas flows in the direction of the driver's seat, which may adversely affect the driver and the like.
[0007]
Further, in such an exhaust pipe structure, there is a problem in that, when the vehicle is running, the exhaust gas directly hits the rear tire, and soot adheres to the tire.
[0008]
The present invention has been made in view of the above circumstances, and has an exhaust system that discharges exhaust gas forward when working at the rear of a vehicle and exhausts exhaust gas rearward when running a vehicle. In a pipe structure, there is provided a vehicle exhaust pipe structure in which when a vehicle is stopped, a driver in front of the vehicle is not adversely affected, and when the vehicle is running, exhaust gas does not hit rear wheels. The purpose is.
[0009]
[Means for Solving the Problems]
In order to achieve this object, a vehicle exhaust pipe structure according to claim 1 of the present invention is provided.
The end of the exhaust pipe extending from the muffler is curved and opened to the front side of the vehicle, and air is sucked inflow from the opening of the exhaust pipe rearward into or near the opening of the exhaust pipe when the vehicle is running. In the vehicle exhaust pipe structure connected to an auxiliary exhaust pipe that can discharge exhaust gas in the exhaust pipe backwards,
A front-side deflection plates to direct the exhaust gas discharged from the opening of the exhaust pipe to the vehicle front side to the vehicle side, the vehicle side of the exhaust gas discharged from the rear opening of the vehicle rear side of the auxiliary exhaust pipe A deflection structure integrally formed with a rear-side deflection plate directed toward the exhaust pipe and a connection plate disposed above the exhaust pipe and the auxiliary exhaust pipe for connecting the two deflection plates to each other; It is attached detachably in the vicinity,
And the front-side deflection plate and the rear deflector, with at least a portion of the auxiliary exhaust pipe is arranged so as to be located outside in the vehicle width direction of both deflectors, lower ends of the two deflecting plates Are configured to extend below the exhaust pipe .
[0010]
Further, in the vehicle exhaust pipe structure according to claim 2, the connection plate is provided with a fixing bracket for the exhaust pipe and a hole for a U-shaped bolt supported by the exhaust pipe. The deflecting plates are attached to the vehicle body such that the deflecting angles and positions of the deflecting plates with respect to the auxiliary exhaust pipe are adjusted.
[0011]
[Action]
According to the first aspect, the front deflection plate is provided so as to direct exhaust gas discharged toward the vehicle front side from the opening of the exhaust pipe toward the vehicle side, and the rear deflection plate is provided with the auxiliary exhaust pipe. The exhaust gas discharged from the rear opening of the vehicle toward the rear of the vehicle is directed to the side of the vehicle. Therefore, during cargo handling such as when the vehicle is stopped, exhaust gas discharged to the front side from the opening curved forward of the exhaust pipe is directed to the side by the front deflection plate, so that the conventional operation is performed. It does not head in the seat direction, and the driver and the like are not adversely affected. On the other hand, when the vehicle travels, the exhaust gas discharged from the rear opening of the auxiliary exhaust pipe is directed sideways by the rear deflection plate, so that the exhaust gas does not hit the rear wheel tires as in the conventional case. Thus, the adhesion of soot to the tire is effectively prevented. As described above, according to the present invention, light work and long life of the tire can be achieved.
[0012]
Furthermore, since the two deflection plates are arranged such that at least a part of the auxiliary exhaust pipe is located outside of the both deflection plates in the vehicle width direction, the suction effect of the auxiliary exhaust pipe is not hindered. Also, the scavenging effect of the engine is not hindered.
[0013]
Further, according to the second aspect, since both the deflection plates are mounted on the vehicle body such that the deflection angle and the position with respect to the auxiliary exhaust pipe are adjusted, the speed and the amount of the exhaust gas, or the design items of the vehicle, etc. Accordingly, the deflection angle of the exhaust gas can be adjusted optimally.
[0014]
【Example】
Hereinafter, a vehicle exhaust pipe structure according to an embodiment of the present invention will be described with reference to the drawings.
[0015]
FIG. 1 is a plan view of a vehicle provided with a vehicle exhaust pipe structure according to one embodiment of the present invention, and FIG. 2 is an enlarged plan view showing a main part of the vehicle exhaust pipe structure shown in FIG. 3A is a plan view of the deflection plate having the exhaust pipe structure of the vehicle shown in FIG. 1, and FIG. 3B is a side view of the deflection plate shown in FIG.
[0016]
As shown in FIG. 1, in the present embodiment, the refuse collection vehicle 10 generally includes a driver's seat 11 and a refuse collection box 12 arranged behind the driver's seat 11. A muffler 13 is attached to a lower chassis frame (15 in FIG. 2), and an exhaust pipe 14 extends from the muffler 13.
[0017]
As shown in an enlarged manner in FIG. 2, a fuel tank 16 is arranged on the side of the chassis frame 13, and a side guard 17 is arranged outside the fuel tank 16. The exhaust pipe 14 extending from the muffler 13 fixed to the lower side of the chassis frame 15 is temporarily extended backward, then curved forward, and then extended laterally. A rear wheel 18 is located behind the exhaust pipe 14 extended to the side. The end 14a of the exhaust pipe 14 is curved and opened forward. Around the end 14a, an auxiliary exhaust pipe 19 of a diffuser pipe extending rearward is connected. However, the auxiliary exhaust pipe 19 may have any shape as long as it sucks air from the end 14a of the exhaust pipe 14 during traveling of the vehicle and causes exhaust gas in the exhaust pipe 14 to flow backward by the suction effect. Or a venturi tube or the like. Further, a deflection structure 20 is disposed before and after the end 14a and the auxiliary exhaust pipe 19.
[0018]
As shown in FIG. 3, the deflection structure 20 includes a front deflection plate 21 that directs exhaust gas discharged from the end 14 a of the exhaust pipe 14 toward the front of the vehicle toward the vehicle, and a rear portion of the auxiliary exhaust pipe 19. A rear-side deflecting plate 22 for directing exhaust gas discharged to the vehicle rear side from the opening toward the vehicle side, and a connecting plate 23 for connecting the two deflecting plates 21 and 22 and disposed above the auxiliary exhaust pipe 19 and the like. And are integrally configured. A U-shaped bolt 24 supported by the exhaust pipe 14 is provided, and a hole 24 a for the U-shaped bolt 24 is formed in the connecting plate 23. Further, the connection plate 23 is provided with a fixing bracket 25 for the exhaust pipe 14. With these U-shaped bolts 24 and fixing brackets 25, the deflection structure 20 is mounted so as to be position-adjustable.
The front deflection plate 21 is deflected by the angle θa, and the rear deflection plate 22 is deflected by the angle θb. As a result, the deflection angles θa and θb with respect to the auxiliary exhaust pipe 19 are adjusted by the U-shaped bolt 24 and the fixing bracket 25. In addition, as described above, the outward movement of the deflection structure pair 20 is also adjusted by the U-bolt 24 and the fixing bracket 25. Therefore, the deflection angle of the exhaust gas can be optimally adjusted according to the speed and amount of the exhaust gas, the design items of the vehicle, and the like.
[0019]
Further, the two deflecting plates 21 and 22 do not cover the entire auxiliary exhaust pipe 19, but are arranged so that at least a part of the auxiliary exhaust pipe 19 is located outside of the two deflecting plates in the vehicle width direction. . Preferably, the auxiliary exhaust pipe 19 covers about 1/3 to 1/2 of the vehicle width direction. Thus, the suction effect of the auxiliary exhaust pipe is not hindered, and the scavenging effect of the engine is not hindered.
[0020]
Next, the operation according to the present embodiment will be described.
When the cargo handling operation is performed while the vehicle is stopped, the exhaust gas is discharged obliquely forward in the curved exhaust pipe as shown by the broken line in FIG. However, in the present embodiment, as shown in FIG. 3A, the exhaust gas discharged to the front side from the opening 14 a curved forward of the exhaust pipe 14 is directed to the side by the front deflection plate 21. Therefore, the vehicle does not head in the driver's seat direction as in the related art, and the driver and the like are not adversely affected.
[0021]
On the other hand, when the vehicle starts running, air is taken into the auxiliary exhaust pipe from the end of the exhaust pipe due to the suction effect of the auxiliary exhaust pipe as shown by the solid line in FIG. As a result, the exhaust gas flowing through the exhaust pipe curved by the ram pressure applied to the front opening of the auxiliary exhaust pipe is sucked into the auxiliary exhaust pipe, and the exhaust gas is flown to the rear of the vehicle. However, in this embodiment, as shown in FIG. 3A, the exhaust gas discharged from the rear opening of the auxiliary exhaust pipe 19 is directed to the side by the rear deflection plate 22, so that the exhaust gas is As described above, the soot is not applied to the tire of the rear wheel 18 and soot is effectively prevented from adhering to the tire. As described above, in the present embodiment, light work and long life of the tire can be achieved.
[0022]
The present invention is, of course, not limited to the above-described embodiments, but can be variously modified.
[0023]
【The invention's effect】
As described above, in claim 1 of the present invention, during cargo handling work such as when the vehicle is stopped, the exhaust gas discharged forward from the opening of the exhaust pipe is directed to the side by the front deflection plate. Therefore, the vehicle does not head in the driver's seat direction, and the driver and the like are not adversely affected. On the other hand, when the vehicle is running, the exhaust gas discharged from the rear opening of the auxiliary exhaust pipe is directed sideways by the rear deflection plate, so that the exhaust gas is not applied to the tires of the rear wheels, and Is effectively prevented. As described above, according to the present invention, light work and long life of the tire can be achieved.
[0024]
Further, according to the second aspect, since both the deflection plates are attached to the vehicle body so that the deflection angle and the position with respect to the auxiliary exhaust pipe are adjusted, the speed and the amount of the exhaust gas, or the design items of the vehicle, etc. Accordingly, the deflection angle of the exhaust gas can be adjusted optimally.
[Brief description of the drawings]
FIG. 1 is a plan view of a vehicle provided with a vehicle exhaust pipe structure according to one embodiment of the present invention.
FIG. 2 is an enlarged plan view showing a main part of the exhaust pipe structure of the vehicle shown in FIG. 1;
3 (a) is a plan view of a deflecting plate having the exhaust pipe structure of the vehicle shown in FIG. 1, and FIG. 3 (b) is a side view of the deflecting plate shown in FIG. 3 (a).
FIG. 4 is a plan sectional view showing a conventional exhaust pipe structure for a vehicle.
[Explanation of symbols]
13 Muffler 14 Exhaust pipe 14a End 19 Auxiliary exhaust pipe 20 Deflection structure 21 Front deflection plate 22 Rear deflection plate

Claims (2)

The end of the exhaust pipe extending from the muffler is curved and opened to the front side of the vehicle, and air is sucked inflow from the opening of the exhaust pipe rearward into or near the opening of the exhaust pipe when the vehicle is running. In the vehicle exhaust pipe structure connected to an auxiliary exhaust pipe that can discharge exhaust gas in the exhaust pipe backwards,
A front-side deflection plates to direct the exhaust gas discharged from the opening of the exhaust pipe to the vehicle front side to the vehicle side, the vehicle side of the exhaust gas discharged from the rear opening of the vehicle rear side of the auxiliary exhaust pipe A deflection structure integrally formed with a rear-side deflection plate directed toward the exhaust pipe and a connection plate disposed above the exhaust pipe and the auxiliary exhaust pipe for connecting the two deflection plates to each other; It is attached detachably in the vicinity,
And the front-side deflection plate and the rear deflector, with at least a portion of the auxiliary exhaust pipe is arranged so as to be located outside in the vehicle width direction of both deflectors, lower ends of the two deflecting plates Is configured to extend below the exhaust pipe. The connecting plate is provided with a fixing bracket for the exhaust pipe and a hole for a U-bolt supported by the exhaust pipe, and a deflection angle and a position of the deflection plates with respect to the auxiliary exhaust pipe. The exhaust pipe structure for a vehicle according to claim 1, wherein the exhaust pipe structure is mounted on the vehicle body such that the pressure is adjusted.

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