Internal combustion engine with a sound-reducing encapsulation

Details Internal combustion engine with a sound-reducing encapsulation Internal combustion engine with a sound-reducing encapsulation

1978-08-14

1980-05-20

Lazarus, Ira S.

Internal-combustion engines

Accessories

Covers, trays, vibrators, corrosion inhibitors, air filters

123 417, 181204, F02B 7700

Patent

active

042034078

ABSTRACT:
An internal combustion engine with a sound-reducing encapsulation, wherein at least the hottest parts of the exhaust system of the engine are located outside of the engine encapsulation and within a special exhaust pipe casing. At the upper side of the exhaust pipe casing an air outlet opening is provided through which the air heated by the exhaust system parts can emerge to the surroundings without getting into the encapsulation. The air outlet opening is lined with sound-absorbing material. The free sectional area of the air outlet opening preferably may be variable by flap means and in dependency of an engine operation parameter. The flap means can be operated by a hydraulic cylinder connected to the lubricating system of the engine.

REFERENCES:
patent: Re29923 (1979-03-01), Thien et al.
patent: 3684053 (1972-08-01), Fachbach et al.
patent: 3951114 (1976-04-01), Fachbach et al.
patent: 4011849 (1977-03-01), Latham
patent: 4149512 (1979-04-01), Hatz

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