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公开(公告)号:US10119517B2
公开(公告)日:2018-11-06
申请号:US15638481
申请日:2017-06-30
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor: Hisato Hirooka
IPC: F02B17/00 , F02P15/00 , F02D41/06 , F02D41/34 , F02D43/00 , F02N19/00 , F02P5/153 , F02D41/02 , F02D41/40 , F02D35/02 , F02D37/02 , F02N11/08 , F02D41/00
Abstract: A control device for an internal combustion engine is programmed, during a catalyst warm-up control, to perform first fuel injection by an injector in an intake stroke, control an ignition device so as to generate a discharge spark in a predetermined period in an expansion stroke, and perform second fuel injection, at a timing retarded from a compression top dead center, such that its injection period overlaps with at least a part of the predetermined period and an end timing of the injection period is advanced from an end timing of the predetermined period. Further, the control device is programmed, during the catalyst warm-up control, to control an actual tumble ratio depending on a result of determination using a first index value representing a speed of initial combustion accompanying an ignition by the ignition device and a second index value representing a speed of main combustion accompanying the ignition.
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公开(公告)号:US09856845B2
公开(公告)日:2018-01-02
申请号:US15180573
申请日:2016-06-13
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor: Sachio Mori , Hisato Hirooka , Chikara Dodate
CPC classification number: F02M65/001 , F02D41/024 , F02D41/064 , F02D41/221 , F02D41/2467 , F02D41/3023 , F02D41/3094 , F02D41/402 , F02D2200/0614 , Y02T10/26 , Y02T10/44
Abstract: Where performing a main injection, and a sub-injection that injects a minute amount of fuel in a short region of driving time, a check is conducted to determine whether or not the minute amount of fuel is injected accurately. In a specific cycle at a time of cold starting when catalyst warm-up control is performed, the main injection is omitted and a checking injection corresponding to a sub-injection is performed. Injection conditions of an in-cylinder injection valve are made uniform between the checking injection and the sub-injection. A fuel amount that is actually injected from the in-cylinder injection valve in the specific cycle is calculated based on an air-fuel ratio of exhaust gas discharged from an engine and an in-cylinder air amount, and is compared with a fuel amount that theoretically should be injected from the in-cylinder injection valve.
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