SECONDARY AIR CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

PURPOSE:To speedily activate a catalyst and secure the best invert ratio by determining a stopping timing of secondary air supply according to an afterburning rate due to the secondary air supply. CONSTITUTION:A heat generation rate G is obtained from a fuel injection amount and an ignition timing (...

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Bibliographic Details
Main Author TAYAMA AKIRA
Format Patent
LanguageEnglish
Published 28.03.1995
Edition6
Subjects
BLASTING
ENGINE PLANTS IN GENERAL
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL
HEATING
LIGHTING
MACHINES OR ENGINES IN GENERAL
MECHANICAL ENGINEERING
STEAM ENGINES
WEAPONS
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Summary:PURPOSE:To speedily activate a catalyst and secure the best invert ratio by determining a stopping timing of secondary air supply according to an afterburning rate due to the secondary air supply. CONSTITUTION:A heat generation rate G is obtained from a fuel injection amount and an ignition timing (P5). Heat capacity Y in an exhaust passage is determined based on a cooling water temperature at the starting time. An exhaust temperature TEX of a secondary air supplying position is estimated (P6), and an afterburning rate I is estimated (P7). A catalyst temperature TCTFI at the termination of secondary air supplying is determined according to the afterburning rate I (P8). When the exhaust temperature TEX is that value or more, the secondary air supplying is stopped (P9, P10).
Bibliography:Application Number: JP19930233450