SKIP-FIRE ENGINE SYSTEM FEATURING DIFFERENT TYPES OF OIL CONTROL SOLENOIDS

    公开(公告)号:US20220397071A1

    公开(公告)日:2022-12-15

    申请号:US17776015

    申请日:2020-11-05

    Applicant: CUMMINS INC.

    Abstract: A system for selectively activating and deactivating cylinders includes a first cylinder positioned in a cylinder block. A first intake or exhaust valve is coupled to the first cylinder and is actuated by a first coupling mechanism. A first oil control solenoid is coupled to the first coupling mechanism, the first oil control solenoid deactivates the first coupling mechanism to maintain the first intake or exhaust valve in a closed position. A second cylinder is positioned in the cylinder block, and a second intake or exhaust valve is coupled to the second cylinder. The second intake or exhaust valve is actuated by a second coupling mechanism. A second oil control solenoid is coupled to the second coupling mechanism, the second oil control solenoid deactivates the second coupling mechanism to maintain the second intake or exhaust valve in a closed position. The first oil control solenoid and the second oil control solenoid have different operating parameters.

    SYSTEMS AND METHODS FOR CONTROLLING CYLINDER DEACTIVATION OPERATION IN ELECTRIFIED POWERTRAINS

    公开(公告)号:US20220034267A1

    公开(公告)日:2022-02-03

    申请号:US16983010

    申请日:2020-08-03

    Applicant: Cummins Inc.

    Abstract: At least some embodiments of the present disclosure are directed to systems and methods for controlling a cylinder deactivation (CDA) operation for an electrified powertrain, the electrified powertrain comprising an engine and an additional power source, the engine having a plurality of cylinders. The method includes the step of: operating the electrified powertrain in a CDA mode and deactivating one or more selected cylinders of the plurality of cylinders; receiving measurement data indicative of operating conditions of the electrified powertrain; analyzing the measurement data to determine whether a predetermined operating condition is met; and adjusting the CDA operation by adjusting the duration of the CDA operation or changing a number of deactivated cylinders.

    IN-CYLINDER AIR INJECTION VIA DUAL-FUEL INJECTOR

    公开(公告)号:US20220018321A1

    公开(公告)日:2022-01-20

    申请号:US17490162

    申请日:2021-09-30

    Applicant: Cummins Inc.

    Abstract: A fuel system is provided, comprising: a liquid fuel source; a gaseous fuel source; and a dual injector having a first flow path in flow communication with the liquid fuel source and a second flow path in flow communication with gaseous fuel source, and an outlet in flow communication with the first and second flow paths and positioned to directly inject liquid fuel from the first flow path and gaseous fuel from the second flow path into a combustion chamber of a cylinder of an engine.

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