JPH0657784U - A device that reduces the pressure drag generated on the rear end surface of a moving bus or truck - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] Preventing pressure drop due to wakes generated when buses and trucks travel, reducing pressure drag in the direction of air flow, and increasing the speed of buses and trucks. Improve the fuel consumption rate, and eventually help prevent air pollution. [Structure] Inlet nozzles 1 are provided at the four front corners of the bus / truck or the like, and three to four locations at the upper two corners of the front and the center of the lower part to take in air and pass through three to four pipes 2 extending to the rear end face, and inside the pipes. The propeller or fan-shaped compressor 3 having a relatively large inertial force is rotated by the air flowing through the nozzle 3, and the compressed air is discharged from the nozzle 4 to the rear of the bus, truck or the like.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for preventing a pressure drop due to a wake generated when a bus / truck or the like travels, reducing a pressure drag in the air flow direction, and speeding up the bus / truck or the like and improving a fuel consumption rate. It is a thing.

[0002]

[Prior art]

 Conventionally, small passenger cars, especially sports-type cars, have been equipped with devices (spoilers, T-bars, etc.) that suppress the generation of wakes and reduce the pressure drag in the air flow direction. In addition, the truck covers the step between the cabin (driver's seat) and the container on the body with an oblique plate and only reduces the air resistance to the front surface. No action was taken. In the bus, no measures were taken against air resistance and pressure drag due to wake.

[0003]

[Problems to be solved by the device]

 Conventional bus trucks have the following drawbacks. (A) The shape was box-shaped, and air resistance was generated on the front surface while driving and pressure drag was generated on the rear end surface due to wake flow, and there was a large amount of engine output loss and speed could not be increased. (B) When trying to increase speed, a large amount of fuel was used, which was a factor in air pollution. The present invention has been made to compensate for these drawbacks.

[0004]

[Means for solving the problem]

 Inlet nozzles (1) are installed at the four front corners of the bus / truck, etc. or at the upper two corners of the front and three to four places in the lower center to take in air and pass through the three to four pipes (2) extending to the rear end surface. The air flowing in the pipe rotates the propeller or fan-shaped compressor (3) having a relatively large inertial force, and the compressed air is discharged from the nozzle (4) to the rear of the bus truck or the like. The present invention is a device configured as described above to reduce the pressure drag generated on the rear end surface of a traveling bus or truck.

[0005]

[Work]

 Inlet nozzles (1) are installed at the front four corners of the conventional bus / truck, etc. or the upper two corners of the front and the center of the lower part at 3 to 4 places to take in air and to the 3 to 4 pipes (2) extending to the rear end surface The air flowing in the pipe rotates the propeller or fan-like compressor (3) having a relatively large inertial force, and the compressed air is discharged from the nozzle (4) to the rear of the bus truck, etc. While driving, the pressure drop caused by the wake is prevented, the pressure drag in the air flow direction is reduced, the maximum speed of buses, trucks, etc. is increased to respond to the speed increase and the fuel consumption rate is improved. Prevent further pollution of the atmosphere.

[0006]

[Effect of device]

 At present, buses and trucks are less demanding for speed-up compared to small passenger cars, and because light oil is used as fuel, they are more economical than gasoline and fuel consumption rate may be a problem. There wasn't. However, it is inevitable that the speed limit will be raised due to the rumored construction of the 2nd Tomei Expressway. Furthermore, the development of vehicles that are friendly to the environment (environment) is expected to become a global trend. Therefore, compared to the conventional bus / truck, etc., both the speedup and the fuel consumption rate are improved, and the bus / truck, etc. having this device capable of preventing further pollution of the atmosphere meet the above requirements. I am fully satisfied.

[Brief description of drawings]

FIG. 1 is a perspective view of the present invention.

FIG. 2 is a partially cutaway view of the present invention.

FIG. 3 is a perspective view showing an embodiment of the present invention.

[Explanation of symbols]

 1 inlet nozzle 2 air flow pipe 3 propeller or fan-like compressor 4 nozzle 5 net

Claims (1)

[Scope of utility model registration request] Claims: 1. Inlet nozzles are provided at four front corners of a running bus / truck or the like, and three to four locations at the upper two corners of the front and the center of the lower part to take in air and pass through three to four pipes extending to the rear end face, By rotating the propeller or fan-shaped compressor with a relatively large inertial force by the air flowing in the pipe, the compressed air is discharged from the nozzle to the rear of the bus, truck, etc.,
A device that prevents the pressure drop generated by the wake during traveling and reduces the pressure drag in the air flow direction.