公开(公告)号：US11761358B2

公开(公告)日：2023-09-19

申请号：US17744210

申请日：2022-05-13

Applicant: Arctic Cat Inc.

Inventor： Carson Price ,  Jeremy Mammen

IPC: F01L7/12 ,  F02D13/02 ,  F01L7/10

CPC classification number: F01L7/12 ,  F01L7/10 ,  F02D13/0242 ,  F02D2200/101

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.

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.

公开(公告)号：US20230359403A1

公开(公告)日：2023-11-09

申请号：US18224322

申请日：2023-07-20

Applicant: Arctic Cat Inc.

Inventor： Carson Price ,  Jeremy Mammen

IPC: B41J29/04 ,  G06F3/12 ,  G06F15/00 ,  B41J13/10 ,  B41J2/005 ,  B41J3/60

CPC classification number: G06F3/12 ,  B41J2/0057 ,  B41J3/60 ,  B41J13/103 ,  B41J29/04 ,  G06F15/00

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.