Internal-combustion engines – Valve – Valve seat relation
Reexamination Certificate
2008-05-27
2008-05-27
Kwon, John T. (Department: 3747)
Internal-combustion engines
Valve
Valve seat relation
C123S07900R
Reexamination Certificate
active
11725345
ABSTRACT:
An outwardly-opening gas-exchange valve assembly for an internal combustion engine. The valve assembly includes a port in a firing chamber in an engine head, the port having a valve seat on a side opposite from the firing chamber. A piston-shaped poppet valve head slides in a bore in the engine head for mating with the valve seat to occlude passage of gas across the valve seat. Withdrawal of the poppet valve head from the seat opens the firing chamber to communication with an intake or exhaust manifold runner in the engine head. The poppet valve head may be actuated by an overcenter lever arrangement actuated selectively by hydraulic pressure or mechanical actuation. In a preferred embodiment, OO intake and exhaust valves are radially arranged in a hemispherical fire deck and may include an adjustable pitch helical channel to induce swirl to the incoming gas.
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Regueiro, Jose F. and Kosina, Vladimir; “Rotular Tappet Valve Trains for Hemispherical Combustion Chambers”; SAE Technical Paper Series 960058; Reprinted from: Applications of New Diesel Engine and Component Design (SP-1158); International Congress & Exposition; Detroit, MI; Feb. 26-29, 1996.
Mello, J. P., and Linna, J.R.; “Homogeneous Charge Compression Ignition (HCCI)—The Pathway to Clean Diesel Engines?”; TIAX, LLC; Cambridge, Mass; Jan. 30, 2003.
Delphi Technologies Inc.
Kwon John T.
Marshall Paul L.
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