Secondary air supply system

Details Secondary air supply system Secondary air supply system

1981-09-02

1984-04-10

Nelli, Raymond A.

Internal-combustion engines

Accessories

Covers, trays, vibrators, corrosion inhibitors, air filters

60278, 181204, F02B 7510

Patent

active

044414684

ABSTRACT:
A reed type valve is operatively secured on the outer surface of the casing of an engine air filter assembly to supply the exhaust system of an engine with secondary air. The reed valve is fluidly connected to an air induction passage formed inside the casing of the air filter assembly. A resonance chamber is also formed inside of the casing and communicates through a communication passage with the air induction passage so as to attenuate a relatively low frequency component of exhaust noise transmitted through the reed valve. The air induction passage, resonance chamber and communication passage are formed as follows: ##EQU1## where, S.sub.o (cm.sup.2)=the cross-sectional area of the air induction passage

REFERENCES:
patent: 2798470 (1957-07-01), Keikhaefer
patent: 3966014 (1976-06-01), Gowing
patent: 3990419 (1976-11-01), Itakura
patent: 4172362 (1979-10-01), Mizuno et al.

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