公开(公告)号：US20210140381A1

公开(公告)日：2021-05-13

申请号：US17076805

申请日：2020-10-22

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Takamitsu MIZUTANI ,  Yusuke JOH ,  Masanao IDOGAWA ,  Takeshi GENKO

IPC: F02D41/14 ,  F01N3/28 ,  F02D41/30

Abstract: A controller for an internal combustion engine is configured to execute a rich air-fuel ratio control for performing fuel injection while setting a target equivalence ratio such that, at recovery from a fuel cutoff process, an air-fuel ratio of air-fuel mixture is richer than a stoichiometric air-fuel ratio. The controller is configured to execute a target equivalence ratio setting process for setting the target equivalence ratio that is maintained during execution of the rich air-fuel ratio control such that the target equivalence ratio increases as an air excess ratio that is calculated from an output value of a second air-fuel ratio sensor at start of the rich air-fuel ratio control increases.