Engine expansion braking with adjustable valve timing

Internal-combustion engines – Engine speed regulator – Responsive to deceleration mode

Reexamination Certificate

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C123S090110, C123S090150

Reexamination Certificate

active

06959689

ABSTRACT:
A system and method for controlling operation of cylinder with at least an intake and exhaust valve and a piston are described. In one aspect, the method comprises maintaining at least one of the intake and exhaust valves in a closed position during a period. Further, closing the other of the intake and exhaust valves with the piston at a first position from, and then opening the other of the intake and exhaust valves at a second position of the piston closer to bottom center than said first position, during said period.

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patent: 6192857 (2001-02-01), Shimada
patent: 6269793 (2001-08-01), Russ et al.
patent: 6371065 (2002-04-01), Shiraishi et al.
patent: 6526745 (2003-03-01), Ogiso
patent: 2004/0040530 (2004-03-01), Katsumata
U.S. Appl. No. 10/888,716, filed Jul. 8, 2004, Michelini et al.
U.S. Appl. No. 10/888,664, filed Jul. 8, 2004, Megli et al.
Gibson, A. O., Kolmanovski, I. V., 2003, “Modeling Positive Intake Valve Overlap Air Charge Response in Camless Engines,” ACC Proceedings.
Ashhab, M.-S.S., Stefanopoulou, A.G., Cook, J.A., Levin, M.B., Control-Oriented Model for Camless Intake Process (Part I), ASME Journal of Dynamic Systems, Mesurement and Control, vol. 122, pp. 122-130, Mar. 2000.

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