Plastic air intake silencer box for marine engine

Details Plastic air intake silencer box for marine engine Plastic air intake silencer box for marine engine

1988-03-24

1989-07-11

Fuller, B. R.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181243, 181282, 440 88, 440900, F02M 3500

Patent

active

048463000

ABSTRACT:
A marine engine (18) is provide with a multi section injection molded thermoplastic air box (24) directing air to the fuel system's air intake throat (22) and silencing engine noise emitted back through the throat. The air box has a cover section (28) and a base section (26) mounted to each other solely by a seal (30) along a peripheral seam around the entire perimeter thereof, to prevent fuel leaks. The housing sections are preassembled to each other prior to mounting to the air intake throat. A removeable plug (70) in the cover section allows access through the cover section to bolts (56, 58) mounting the base section to the throat. Access is also enabled to a fuel adjustment screw (74) to enable adjustment, with the air box fully assembled and mounted in place on the throat, to enable adjustment under actual operating conditions. Air guide passages (32, 34) and an air plenum chamber (36) are all molded in place.

REFERENCES:
patent: 3557902 (1971-01-01), Brown et al.
patent: 3826332 (1974-07-01), Tuckey
patent: 4093039 (1978-06-01), Morre et al.
patent: 4109751 (1978-08-01), Kabele
patent: 4136756 (1979-01-01), Kawamura
patent: 4319657 (1982-03-01), Nomura
patent: 4326600 (1982-04-01), Okazaki et al.
patent: 4569415 (1986-02-01), Breckenfeld et al.
patent: 4620607 (1986-11-01), Breckenfeld et al.

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