Increased engine braking with adjustable intake valve timing

Details Increased engine braking with adjustable intake valve timing Increased engine braking with adjustable intake valve timing

2005-10-04

2005-10-04

Kwon, John T. (Department: 3747)

Internal-combustion engines

Engine speed regulator

Responsive to deceleration mode

C123S322000, C123S090110

Reexamination Certificate

active

06951198

ABSTRACT:
A system and method for operating at least an intake and exhaust valve in a cylinder with a piston of an engine in a vehicle are described. In one aspect, the method comprises maintaining at least the exhaust valve in a closed position during a period of net engine torque less than zero. Further, during said period of net engine torque less than zero, operating with at least the intake valve open, then closing the intake valve, and then opening the intake valve.

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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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