Air-to-fuel ratio control system for an engine

Details Air-to-fuel ratio control system for an engine Air-to-fuel ratio control system for an engine

1984-10-29

1986-02-25

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Having fluidic logic control means

123478, 123489, F02M 720

Patent

active

045721351

ABSTRACT:
In a carburetor in which air-to-fuel ratio is feedback controlled into a stoichiometric mixture ratio in response to oxygen sensor signals, air-to-fuel ratio is determined to a lower value to supply a rich mixture to an engine when intake air temperature and engine coolant temperature both exceed each reference value, so that engine overheat can be prevented at high temperatures. The lower air-to-fuel ratio is determined to a fixed value or to an appropriate value under consideration of intake air temperature and engine coolant temperature or additionally vehicle speed.

REFERENCES:
patent: 4400944 (1983-08-01), Iwamoto et al.
patent: 4452207 (1984-06-01), Moore, Jr.
patent: 4452209 (1984-06-01), Ohara et al.

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