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US 11,131,235 B2Granted
System and method for bypassing a turbocharger of a two stroke engine
AssigneePolaris Industries Inc.
InventorsJames H. Buchwitz, Darren J. Hedlund, Lucas R. Salfer, Reed A. Hanson, Derek D. Zimney
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Abstract
An engine system comprises a two stroke engine, an exhaust manifold, a tuned pipe coupled to the exhaust manifold and a turbocharger coupled to the engine. The turbocharger comprises a turbine inlet coupled to the exhaust manifold through the tuned pipe, and a turbine outlet coupled to an exhaust pipe. A silencer is coupled to the exhaust pipe. A bypass pipe has a first end coupled to the tuned pipe and a second end bypassing the turbine outlet and a wastegate disposed in the bypass pipe.
Claims13
A system comprising:
- a two stroke engine;
- an exhaust manifold;
- a tuned pipe comprising a diverging portion coupled to the exhaust manifold, a converging portion coupled to either a silencer or coupled to a stinger pipe coupled to the silencer, and a center portion disposed between the converging portion and the diverging portion;
- said silencer coupled to an exhaust pipe;
- a bypass pipe having a first end coupled to the tuned pipe and a second end coupled to the exhaust pipe;
- an exhaust bypass valve disposed in the bypass pipe;
- a tuned pipe pressure sensor coupled to the tuned pipe generating a tuned pipe pressure signal corresponding to a pressure within the tuned pipe, wherein the tuned pipe pressure sensor is disposed on the center portion;
- and
- a controller controlling a position of the exhaust bypass valve in response to the tuned pipe pressure signal.
6 more elements
Dependencies are inferred from the claim text.