Secondary air supply system

Details Secondary air supply system Secondary air supply system

1979-06-07

1982-03-16

Nelli, Raymond A.

Internal-combustion engines

Accessories

Covers, trays, vibrators, corrosion inhibitors, air filters

60278, 181204, F02F 134, F02B 7510

Patent

active

043195490

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 interior of the casing of the air filter assembly. A resonance chamber is also formed interior of the casing and communicated 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), Kiekhaefer
patent: 3966014 (1976-06-01), Gowing
patent: 4172362 (1979-10-01), Mizuno et al.

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