Exhaust system for multi-cylinder engine

Details Exhaust system for multi-cylinder engine Exhaust system for multi-cylinder engine

1988-06-03

1990-05-22

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

60313, 60323, 181236, 181240, F01N 328, F02B 2702

Patent

active

049266357

ABSTRACT:
An exhaust system for a V-type six-cylinder engine having first and second banks each having three engine cylinders. The exhaust system includes first and second exhaust systems which are respectively connected to the first and second banks to be supplied with exhaust gas from the engine cylinders. Each exhaust system includes an exhaust tube connecting a catalytic converter and a muffler. The exhaust tubes of the first and second exhaust systems are communicated at a predetermined position by a communicating pipe member. The predetermined position corresponds to location of antinodes of the resonance sound pressure modes in the respective first and second exhaust systems which modes are reverse in phase to each other, so that resonance frequencies in exhaust noise are cancelled thereby to effectively achieve exhaust noise reduction.

REFERENCES:
patent: 3072214 (1963-01-01), Deremer
patent: 4154058 (1979-05-01), Mase

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