公开(公告)号：US20190186329A1

公开(公告)日：2019-06-20

申请号：US15752366

申请日：2016-05-02

Applicant: Cobra Aero LLC

Inventor： H. Sean Hilbert ,  Phil McDowell ,  Scott Castonguay ,  Wendell Pen rod ,  Jim Newton ,  Mark Johnson

IPC: F01N13/08 ,  F02B61/04 ,  F02B75/02 ,  F01N13/10 ,  F02N19/00 ,  F02D13/02

CPC classification number: F01N13/087 ,  F01N1/166 ,  F01N1/168 ,  F01N13/002 ,  F01N13/10 ,  F01N13/1833 ,  F01N2410/00 ,  F02B27/02 ,  F02B27/06 ,  F02B61/04 ,  F02B75/02 ,  F02B2075/025 ,  F02D13/0276 ,  F02D13/0284 ,  F02D2013/0292 ,  F02N19/004 ,  Y02T10/146 ,  Y02T10/18

Abstract: An apparatus for adjusting power and noise characteristics of an internal combustion engine comprises a wall configured to define an engine cylinder that includes a bore and a compression relief passage. A compression relief valve is configured to selectively adjust fluid flow capacity of the compression relief passage. A manifold is configured to be in fluid communication with the exhaust passage and includes an exhaust bypass valve to permit exhaust to at least partially bypass a noise suppressor. Operational characteristics of the engine can be adjusted along a range that extends from a first set of operational characteristics present when both the compression relief valve and the exhaust bypass valve are in a fully open position to a second set of operational characteristics present when both the compression relief valve and the exhaust bypass valve are in a fully closed position.