Tailpipe of automotive vehicle

Abstract

A tailpipe of automotive vehicle comprises a front tube coupled to a muffler, the front tube including two flared ends and a neck having a plurality of apertures, a rear tube having a flared end, an outer venturi tube surrounded a rear portion of the front tube and the whole rear tube, the outer tube including a flared front end, a cylindrical section, an enlarged section, and a rear section having an inward extending rim at an opening thereof, and a plurality of twisted blades equally spaced apart around the rear tube and connected to the front, the rear, and the outer tubes, each blade having a plurality of apertures. Stream of exhaust from the muffler entering into the neck is divided into a number of components prior to forming whirlwind after leaving the tailpipe.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to tailpipe of automotive vehicle and more particularly to such a tailpipe of automotive vehicle with improved characteristics. [0003] 2. Description of Related Art [0004] A conventional exhaust pipe of an internal combustion engine comprises an expansion chamber, a resonant chamber at the rear of the expansion chamber, and a plurality of perforated pipes disposed in both chambers, each pipe being enclosed by glass fibers or sound-absorbing material for silencing noise. Exhaust from the engine may flow into the chambers through apertures of the pipes. This can build a back pressure in the chambers, resulting in a partial back flow of exhaust into the engine. As an end, output torque of the engine is lowered due to incomplete combustion of the engine. U.S. Pat. No. 4,792,014 discloses an excessively long tailpipe of internal combustion engine such that it cannot be readily mounted at the...

AI Technical Summary

Benefits of technology

[0005] It is an object of the present invention to provide a tailpipe of automotive vehicle. The tailpipe has a reduced length so as to be readily mounted at an exhaust pipe. The tailpipe comprises an outer tube constructed by incorporating the principles of venturi tube. By utilizing the present invention, it is possible of carrying out a more complete combustion, reducing air pollution, and further silencing noise.

Problems solved by technology

This can build a back pressure in the chambers, resulting in a partial back flow of exhaust into the engine.

U.S. Pat. No. 4,792,014 discloses an excessively long tailpipe of internal combustion engine such that it cannot be readily mounted at the exhaust pipe.

Further, noise is serious when a car incorporated such tailpipe is driving at high speed, especially more than 100 km per hour.

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