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    ENGINE CONTROL DEVICE, ENGINE CONTROL METHOD, AND ENGINE SYSTEM
    13.
    发明申请
    ENGINE CONTROL DEVICE, ENGINE CONTROL METHOD, AND ENGINE SYSTEM 审中-公开

    公开(公告)号：US20200370500A1

    公开(公告)日：2020-11-26

    申请号：US16811142

    申请日：2020-03-06

    Applicant: Mazda Motor Corporation

    Inventor： Kazuhiro TAKEMOTO ,  Michio ITO ,  Masanari SUEOKA ,  Kazuhiro NISHIMURA ,  Kouji HADAMA ,  Masataka SUMITA ,  Masami NISHIDA

    IPC: F02D41/40 ,  F02F3/28 ,  F02M59/20 ,  F02B77/04

    Abstract: A controller for controlling a fuel injection valve and a fuel pressure adjustment mechanism integrates a deposition amount of deposits per unit time, and estimates a deposition amount of deposits on an injection hole of the fuel injection valve. The controller causes the fuel pressure adjustment mechanism to increase a fuel pressure, when the estimated deposition amount exceeds a predetermined value, and corrects the unit deposition amount acquired by the deposition amount estimation according to the set fuel injection timing of the fuel injection valve. The controller corrects such that as compared with the unit deposition amount when the fuel injection timing is set to a first timing away from a top dead center of the piston by a first period, the unit deposition amount decreases when the fuel injection timing is set to a second timing away by a second period longer than the first period.

    ENGINE CONTROL DEVICE
    19.
    发明申请
    ENGINE CONTROL DEVICE 审中-公开

    公开(公告)号：US20200095903A1

    公开(公告)日：2020-03-26

    申请号：US16086264

    申请日：2017-03-29

    Applicant: MAZDA MOTOR CORPORATION

    Inventor： Masanari SUEOKA ,  Masatoshi HIDAKA ,  Toshiaki TAKAHASHI ,  Tadasu HASHIGUCHI

    IPC: F01L1/24 ,  F02D13/02 ,  F02D41/40

    Abstract: A control device for engine comprising; a variable valve operating mechanism (72) which comprises a cam (72d) and a pressure chamber (72c) internally filled with engine oil; and a hydraulic valve (72b) associated with the pressure chamber (72c) and configured to be opened and closed to control the oil pressure to be applied to an intake valve (22). When the engine load falls within a given low engine load range, the valve opening timing of the intake valve (22) is increasingly retarded according to the engine load and as the engine load becomes higher, within a limit of a given timing, and, when the engine load is increased beyond the given low engine load range, the valve opening timing of the intake valve is fixed to the given timing.

    ENGINE CONTROL DEVICE
    20.
    发明申请
    ENGINE CONTROL DEVICE 审中-公开

    公开(公告)号：US20190085772A1

    公开(公告)日：2019-03-21

    申请号：US16083915

    申请日：2017-03-14

    Applicant: MAZDA MOTOR CORPORATION

    Inventor： Masanari SUEOKA ,  Toshiaki TAKAHASHI ,  Masatoshi HIDAKA ,  Tadasu HASHIGUCHI

    IPC: F02D13/02 ,  F02D41/00 ,  F01L1/26

    Abstract: A engine control device includes an variable exhaust valve mechanism 72 which varies an opening and closing timing of an exhaust valve 22, and a PCM 10 which controls the variable exhaust valve mechanism 72 such that the opening and closing timing of the exhaust valve 22 is varied, wherein the variable exhaust valve mechanism 72 is configured such that a lift amount of the exhaust valve 22 becomes smaller as a retarded degree of the valve opening timing increases, and the PCM 10 is configured to set a maximum retarded valve opening timing in an exhaust stroke based on the lift amount at an exhaust top dead center, and to control the variable exhaust valve mechanism 72 so as to open the exhaust valve 22 in advance of the maximum retarded valve opening timing.

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