Exhaust-outlet control for 2-stroke engine
AssigneeBrp-Rotax GmbH & Co. KG
InventorGünther Zauner
Life of this patent
Estimating the term…
Abstract
An exhaust valve assembly for a two stroke internal combustion engine having a cylinder with at least one main exhaust port and one auxiliary exhaust port is disclosed. The assembly comprises a main exhaust valve for at least partially closing the main exhaust port, an auxiliary exhaust valve for at least partially closing the auxiliary exhaust port, the auxiliary exhaust valve being separate from the main exhaust valve, and an actuator for actuation of the main exhaust valve and the auxiliary exhaust valve, wherein the actuator is connected to the main exhaust valve and the auxiliary exhaust valve is connected to the actuator by the main exhaust valve.
Claims20
An internal combustion engine comprising:
- a crankcase;
- a crankshaft disposed in the crankcase;
- a cylinder block connected to the crankcase, the cylinder block having a cylinder disposed therein;
- a main exhaust port in fluid communication with the cylinder, the main exhaust port having a cross-sectional area;
- an auxiliary exhaust port in fluid communication with the cylinder, the auxiliary exhaust port having a cross-sectional area smaller than the cross-sectional area of the main exhaust port;
- a piston movably disposed within the cylinder and being operatively connected to the crankshaft;
- an exhaust valve assembly, the exhaust valve assembly comprising:
- a main exhaust valve for at least partially closing the main exhaust port;
- an auxiliary exhaust valve for at least partially closing the auxiliary exhaust port, the auxiliary exhaust valve being separate from and movably connected to the main exhaust valve;
- an actuator for actuating the main exhaust valve and the auxiliary exhaust valve;
- the actuator being connected to the main exhaust valve;
- the auxiliary exhaust valve being connected to the actuator via the main exhaust valve;
- and the engine operating on a two-stroke principle.
Dependencies are inferred from the claim text.