Engine valve actuation control and method

Details Engine valve actuation control and method Engine valve actuation control and method

2005-11-22

2005-11-22

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

C123S090150, C123S090110, C251S029000, C251S030010, C251S129030, C137S625340, C137S625390, C137S625640, C091S459000, C091S529000

Reexamination Certificate

active

06966285

ABSTRACT:
A valve actuator control monitors engine valve trajectory, lift and seating velocity and varies the timing of internal feedback control channels to correct for engine valve positioning errors to achieve precise engine valve lift, closing timing and desired seating velocity.

REFERENCES:
patent: 5456222 (1995-10-01), Schechter
patent: 5638781 (1997-06-01), Sturman
patent: 6109284 (2000-08-01), Johnson et al.
patent: 6263842 (2001-07-01), DeOjeda et al.
patent: 6739293 (2004-05-01), Turner et al.
patent: 6837196 (2005-01-01), Sun
patent: 6886510 (2005-05-01), Sun et al.
SAE Technical Paper 1999-01-0825; “Digital Valve Technology Applied to the Control of an hydraulic Valve Actuator”, Kathleen M. Misovec, Bruce G. Johnson, Gary Mansour, Oded E. Sturman and Steven Massey, Detroit MI, Mar. 1-4, 1999.
SAE Technical Paper 2002-02-1109, “Production Electro-Hydraulic Variable Valve-Train for a New Generation of I.C. Engines”, Jeff Allen and Don Law, Detroit, MI, Mar. 4-7, 2002.
SAE Technical Paper 2004-01-1265, “Design and Control of a Two-Stage Electro-hydraulic Valve Actuation System”, Christopher W. Turner, Guy R. Babbit, Christopher S. Balton, Miguel A. Raimao and Daniel D Giodano, Detroit, MI, Mar. 8-11, 2004.

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