Control system of internal combustion engine

• Main Authors: Sachs Jens, Zutz Robert, Ellerbrock Oliver
• Format: Patent
• Language: Chinese; English
• Published: 24.08.2016
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; 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; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; WEAPONS

A control system of an internal combustion engine which can suppress a drop in the purification performance of an exhaust purification catalyst is provided. The control system of an internal combustion engine is provided with an exhaust purification catalyst 20 and downstream side air-fuel ratio sensor 41, performs feedback control so that an air-fuel ratio of the exhaust gas which flows into the exhaust purification catalyst becomes a target air-fuel ratio, and performs target air-fuel ratio setting control which alternately switches the target air-fuel ratio to a lean set air-fuel ratio which is leaner than a stoichiometric air-fuel ratio and a rich set air-fuel ratio which is richer than the stoichiometric air-fuel ratio. In the control system, when an engine operating state is a steady operating state, compared with when it is not a steady operating state, at least one of a rich degree of the rich set air-fuel ratio or a lean degree of the lean set air-fuel ratio is made to increase. 提供了种内燃发动机的控制系统，其能抑制排气