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    EXHAUST VALVE CONTROLLER FOR TWO-STROKE ENGINES
    12.
    发明申请
    EXHAUST VALVE CONTROLLER FOR TWO-STROKE ENGINES 有权

    公开(公告)号：US20250052206A1

    公开(公告)日：2025-02-13

    申请号：US18230945

    申请日：2023-08-07

    Applicant: Arctic Cat Inc.

    Inventor： Carson Price ,  Jeremy Mammen ,  Cord Miller Christensen ,  Alexander Konrad Fuhrman

    IPC: F02D13/02

    Abstract: An exhaust valve includes a toroidal surface about an axis of rotation of the valve. The toroidal surface is positionable over a central exhaust port of an engine when lowered. The valve is raised by an actuator in response to increasing rotational speed of the crankshaft of the engine, thereby enlarging and raising the effective opening of the exhaust port. Lateral valve surfaces on either side of the toroidal surface close lateral exhaust ports when the valve is lowered. The lateral valve surfaces may be cylindrical and formed on fins. The position of the exhaust valve is adjusted continuously along its range of motion and the position of the exhaust valve may be calculated based on some or all of engine speed, engine loading, and exhaust temperature at a frequency up to once per revolution of the engine.

    ENGINE CONTROL SYSTEM AND METHODS
    15.
    发明申请
    ENGINE CONTROL SYSTEM AND METHODS 有权

    公开(公告)号：US20210040907A1

    公开(公告)日：2021-02-11

    申请号：US16989308

    申请日：2020-08-10

    Applicant: Arctic Cat Inc.

    Inventor： Cord Miller Christensen ,  Alexander Konrad Fuhrman

    IPC: F02D41/08 ,  F02D13/02 ,  F02D41/30 ,  F02D41/00 ,  F02P9/00 ,  F02B33/28 ,  F02B33/04

    Abstract: Embodiments describe a method of controlling a two-stroke internal combustion engine is shown. The method includes selecting one set of two or more sets of engine parameter inputs or a weighted value of two or more sets of engine parameter inputs, determining an engine output parameter from the selection, and utilizing the determined engine output parameter to control one or more engine operations; re-selecting one set of two or more sets of engine parameter inputs or a weighted value of two or more sets of engine parameter inputs during engine operation, utilizing the reselected output parameters to adjust one or more engine operations. Each set of engine parameter inputs includes a direct measurement of crankcase pressure and engine speed and optionally one or more of barometric pressure, exhaust valve position, air temperature, engine coolant temperature, exhaust temperature, boost pressure, crankshaft position and direction of rotation, humidity, fuel pressure, fuel temperature, detonation sensor level, exhaust oxygen content, and throttle valve angle.

    Engine Mounting Systems for Snowmobiles
    16.
    发明申请
    Engine Mounting Systems for Snowmobiles 有权

    公开(公告)号：US20250083770A1

    公开(公告)日：2025-03-13

    申请号：US18745703

    申请日：2024-06-17

    Applicant: Arctic Cat Inc.

    Inventor： Guy L. Sibilleau ,  Cord Miller Christensen ,  Christian Ressler ,  Benjamin Nickolas Mercure

    IPC: B62M27/02 ,  B62J41/00 ,  F02B75/02

    Abstract: A snowmobile includes a forward frame assembly defining an engine bay. The forward frame assembly includes a nose frame assembly having a nose frame cross member positioned forward of the engine bay. An engine is positioned within the engine bay. A tunnel is coupled to the forward frame assembly and is positioned aft of the engine bay. A heat exchanger is coupled to a forward end of the tunnel. At least one aftward engine mount is configured to couple the engine to the heat exchanger. At least one forward engine mount is configured to couple the engine to the nose frame cross member. The at least one aftward engine mount has a mount axis that is oriented in a substantially radial direction relative to an axis of rotation of a track driveshaft.

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