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    SPARK IGNITION TYPE ENGINE
    1.
    发明公开
    SPARK IGNITION TYPE ENGINE 审中-公开

    公开(公告)号：US20230203997A1

    公开(公告)日：2023-06-29

    申请号：US17983953

    申请日：2022-11-09

    Applicant: KUBOTA Corporation

    Inventor： Michisuke IGA ,  Kazuhiro TANAKA ,  Masanori HIROCHI ,  Yoshinori OYAMA

    IPC: F02D9/08 ,  F02D13/02

    CPC classification number: F02D9/08 ,  F02D13/0234

    Abstract: A spark ignition type engine enabling engine startability to be favorable is provided. The spark ignition type engine includes a main intake-air passage; a throttle valve of the main intake-air passage; a bypass intake-air passage bypassing the throttle valve; an ISC valve of the bypass intake-air passage; and an electronic control device that controls an engine speed by adjusting an opening degree of the ISC valve, in which when the engine is started, cranking is performed at a cranking opening degree at which the ISC valve is narrowed by a predetermined amount from a fully opened state by control of the electronic control device, so that an intake-air negative pressure is generated on an intake-air downstream side of the ISC valve.

    ENGINE-EQUIPPED VEHICLE
    2.
    发明申请
    ENGINE-EQUIPPED VEHICLE 有权

    公开(公告)号：US20220205400A1

    公开(公告)日：2022-06-30

    申请号：US17541911

    申请日：2021-12-03

    Applicant: KUBOTA Corporation

    Inventor： Michisuke IGA ,  Masaharu ONO

    IPC: F02D41/00 ,  F02D13/06 ,  F02D41/14 ,  F02P5/152 ,  F02P5/15

    Abstract: An engine-equipped vehicle capable of preventing gear noise and gear wear when the engine is started is provided. A multicylinder engine, a gear transmission that shifts power from the multicylinder engine by a shift operation, a centrifugal clutch arranged in a power transmission path from the multicylinder engine to the gear transmission, and an electronic control device that controls an operation of the multicylinder engine are included and the engine is configured to be started with a partial cylinder operation start where under control of the electronic control device, only some cylinders are operated and an operation of other cylinders is stopped.

    ENGINE CONTROL DEVICE AND ENGINE DEVICE
    3.
    发明申请
    ENGINE CONTROL DEVICE AND ENGINE DEVICE 有权

    公开(公告)号：US20240384692A1

    公开(公告)日：2024-11-21

    申请号：US18663584

    申请日：2024-05-14

    Applicant: KUBOTA CORPORATION

    Inventor： Michisuke IGA ,  Tomotaka TANAKA ,  Kosuke AOKI ,  Hiroyuki KAWASOE ,  Kengo HIDAKA

    IPC: F02D41/22 ,  B60K17/02 ,  B60K17/08 ,  F02D41/00 ,  F02D41/40

    Abstract: Provided is an engine control device and an engine device that enable stable self-travelling of the engine in a limp home mode. The engine control device includes a revolution speed detection unit that detects revolution speed of the engine, and an arithmetic unit that calculates an opening of a throttle valve opened by an electronic throttle mechanism, and an injection amount of fuel injected by injectors. In an operation of the engine in the limp home mode, in a case where the revolution speed of the engine detected by the revolution speed detection unit exceeds a predetermined limiting value, the arithmetic unit performs an operation to suppress injection of the fuel to be injected by the injectors.

    SPARK IGNITION TYPE ENGINE
    4.
    发明公开
    SPARK IGNITION TYPE ENGINE 审中-公开

    公开(公告)号：US20230203996A1

    公开(公告)日：2023-06-29

    申请号：US17984019

    申请日：2022-11-09

    Applicant: KUBOTA Corporation

    Inventor： Michisuke IGA

    IPC: F02D9/02 ,  F02D13/02

    CPC classification number: F02D9/02 ,  F02D13/0234 ,  F02D2009/0213

    Abstract: A spark ignition type engine adjusts a base lower limit value of a valve opening degree of an ISC valve to avoid excessive engine rotation that may occur when an increase correction by atmospheric pressure is performed. When a detected engine temperature becomes lower, the base lower limit value of the ISC valve opening degree is increased to the fully open side, and the base lower limit value is corrected to increase to the fully open side with an increase correction value on the basis of a detected atmospheric pressure in an engine middle-high temperature range where the engine temperature exceeds a predetermined value, and the increase correction value is increased to the fully open side as the detected atmospheric pressure becomes lower, and the increase correction is prohibited in an engine low temperature range where the engine temperature is equal to or lower than the predetermined value.

    PORT INJECTION ENGINE
    5.
    发明申请
    PORT INJECTION ENGINE 有权

    公开(公告)号：US20210363954A1

    公开(公告)日：2021-11-25

    申请号：US17325195

    申请日：2021-05-19

    Applicant: KUBOTA Corporation

    Inventor： Kosuke AOKI ,  Michisuke IGA

    IPC: F02M69/04

    Abstract: A port injection engine, in which injected fuel readily vaporizes inside suction ports, includes: a suction port; a suction valve; and a port injector that injects fuel to an inner peripheral surface of the suction port. When the fuel is burned in a predetermined combustion cycle, an injection start of a fuel injection period is set within an end part of a valve opening period before the suction valve is fully closed, during a combustion cycle previous to the predetermined combustion cycle. The end part of the valve opening period is preferably set from 50° to 20° before the suction valve is fully closed at a crank angle.

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