Cam timing control device for automotive engine
AssigneeMazda Motor Corporation
InventorsToshiya Kan, Katsuhiko Sakamoto
Life of this patent
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Abstract
A cam timing control device in an antomotive engine which used in a valve timing correcting device of a type wherein an electromagnetic force is used to change a cam timing. The cam timing control device is so designed that, in the event that a resistance to the change of the cam timing is high, the length of time during which an electric power is continuously supplied to the electromagnetic coil is prolonged.
Claims9
In a valve timing correcting device of a type wherein an electromagnetic force is used to change a cam timing, a cam timing control device for use in association with an automotive engine which comprises control means operable, in the event that a resistance to the change of the cam timing is high, to prolong the length of time during which an electric power is continuously supplied to the electromagnetic coil.
In a valve timing correcting device of a type wherein an electromagnetic force is used to change a cam timing, a cam timing control device for use in association with an automotive engine which comprises control means operable, in the event that a resistance to a retention is high, to increase an electric power to be continuously supplied to the electromagnetic coil at a retained position.
In a valve timing correcting device of a type wherein an electromagnetic force is used to change a cam timing, a cam timing control device for use in association with an automotive engine which comprises control means operable, in the event that a resistance to the change of the cam timing is high, to prolong the length of time during which an electric power is continuously supplied to the electromagnetic coil and, also, in the event that a resistance to a retention is high, to increase an electric power to be continuously supplied to the electromagnetic coil at a retained position.
Dependencies are inferred from the claim text.