Air intake side secondary air supply system for an internal comb

Internal-combustion engines – Charge forming device – Auxiliary air or oxygen added to combustible mixture

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Details

123588, F02M 2308, F02M 2310

Patent

active

046483748

ABSTRACT:
The so called air intake side secondary air supply system for an internal combustion engine having a choke valve in an intake air passage supplies an air intake side secondary air into the intake air passage so that the air-fuel ratio is feedback controlled. During a period of cold operation of the engine in which the choke valve is actuated to close the intake air passage, the supply of the air intake side secondary air is stopped to enrich the air-fuel ratio upon detection of a no-load operating condition of the engine such as in the case where clutch is disengaged or in the case where the shift position of the transmission is the neutral position or the parking position.

REFERENCES:
patent: 4195602 (1980-04-01), Yamashita et al.
patent: 4484553 (1984-11-01), Kobayashi et al.

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