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US 12,553,402 B2Granted
Multi-port exhaust valve
AssigneeArctic Cat Inc.
InventorsCarson Price, Jeremy Mammen
Life of this patent
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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.
Claims10
An engine component comprising:
- a cylinder wall defining:
- a cylinder;
- a central exhaust port;
- a first lateral exhaust port;
- and
- one or more intake ports;
- and
- a cavity outside of the cylinder in fluid communication with the central exhaust port and the first lateral exhaust port, the cavity defining a curved surface extending outwardly from the central exhaust port, the curved surface being a toroidal surface.
5 more elements
Dependencies are inferred from the claim text.