Valve timing controller

Details Valve timing controller Valve timing controller

2007-04-30

2008-11-11

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090170, C701S105000

Reexamination Certificate

active

07448351

ABSTRACT:
A valve timing controller includes a driving circuit, a control circuit, and a signal line. The driving circuit controls electricity applied to the electric motor according to a control signal, and generates a rotation-direction signal which indicates a rotation direction of the electric motor by a voltage level. The control circuit outputs the control signal which is generated according to the rotation-direction signal. The rotation-direction signal is transmitted from the driving circuit to the control circuit through the signal line. The driving circuit outputs the rotation-direction signal of high-level during a predetermined period after the control signal is outputted.

REFERENCES:
patent: 7077087 (2006-07-01), Tani
patent: 7243627 (2007-07-01), Izumi et al.
patent: 06-253580 (1994-09-01), None

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