Invention Grant
- Patent Title: Method and system for controlling pressure in a tuned pipe of a two stroke engine
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Application No.: US16692628Application Date: 2019-11-22
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Publication No.: US11236668B2Publication Date: 2022-02-01
- Inventor: James H. Buchwitz , Darren J. Hedlund , Jon P. Brandt , Reed A. Hanson , Lucas R. Salfer , Derek Zimney
- Applicant: Polaris Industries Inc.
- Applicant Address: US MN Medina
- Assignee: Polaris Industries Inc.
- Current Assignee: Polaris Industries Inc.
- Current Assignee Address: US MN Medina
- Agency: Harness, Dickey & Pierce, P.L.C.
- Main IPC: F02B37/18
- IPC: F02B37/18 ; F01N13/10 ; F02B57/06

Abstract:
An engine system and method of operating the same includes a two stroke engine, an exhaust manifold coupled to the two-stroke engine, a tuned pipe coupled to the exhaust manifold coupled to the exhaust manifold, a stinger pipe coupled to the tuned pipe, a silencer coupled to the tuned pipe and an exhaust pipe, and an exhaust bypass valve. Exhaust gases are directed from the two stroke engine through an exhaust manifold and through a tuned pipe. An opening of the exhaust bypass valve is changed to redirect exhaust gases away from the tuned pipe to change a pressure within the tuned pipe. In response to changing the opening of the exhaust bypass valve, the airflow through the engine is changed.
Public/Granted literature
- US20200182141A1 Method And System For Controlling Pressure In A Tuned Pipe Of A Two Stroke Engine Public/Granted day:2020-06-11
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