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US5493858A Controlling apparatus for introduction air into exhaust pipe of internal combustion engine 失效
将空气引入内燃机排气管的控制装置

Controlling apparatus for introduction air into exhaust pipe of internal
combustion engine
摘要:
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.
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