Internal-combustion engines – Poppet valve operating mechanism – Electrical system
Reexamination Certificate
2006-09-19
2006-09-19
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
Electrical system
C251S129010, C251S129160
Reexamination Certificate
active
07107945
ABSTRACT:
In an electromagnetically driven valve control system, it is determined whether an electromagnetically driven valve is in an attraction period at which a valve body is displaced. When it is determined that the electromagnetically driven valve is in the attraction period, it is further determined whether the period is in a first attraction period at which the valve body is close to a neutral position. When it is determined that the valve body is in the first attraction period, the upper control frequency or the lower control frequency is set to the value indicating the low frequency. When it is determined that the valve body is in the second attraction period at which the valve body is close to either the full-open position or the full-close position, the upper control frequency or the lower control frequency is set to the value indicating the high frequency.
REFERENCES:
patent: 6269784 (2001-08-01), Newton
patent: 6321700 (2001-11-01), Hein et al.
patent: 33 07 683 (1984-07-01), None
patent: 199 54 416 (1999-11-01), None
patent: A 11-62529 (1999-03-01), None
Chang Ching
Denion Thomas
Kenyon & Kenyon LLP
Toyota Jidosha & Kabushiki Kaisha
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