Controlling apparatus for introducing air into an exhaust pipe o

Details Controlling apparatus for introducing air into an exhaust pipe o Controlling apparatus for introducing air into an exhaust pipe o

1995-06-06

1996-10-22

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

60289, 60300, F01N 330

Patent

active

055665470

ABSTRACT:
In an apparatus for controlling the introduction of air into an exhaust pipe of an internal combustion engine in which air is introduced from the intake side to the exhaust side to improve the efficiency of purifying exhaust gases, to prevent a decline in the purification efficiency of a catalyst in a state in which the exhaust gas temperature immediately after starting is low. A control valve 11 is provided in an air introducing pipe 9 for introducing air from the intake side to the exhaust side, and the control valve 11 is set in a shut-off state during starting or during starting and a predetermined time duration immediately after starting.

REFERENCES:
patent: 3503716 (1970-03-01), Berger
patent: 3751914 (1973-08-01), Pollock
patent: 3962867 (1976-06-01), Ikeura et al.
patent: 4098078 (1978-07-01), Laurent

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