| 摘要 |
PURPOSE: An operation order control method of dual camshaft variable valve-timing devices is provided to improve response property of quickly driving the camshaft variable valve-timing devices by a minimum drive source. CONSTITUTION: An operation order control method of dual camshaft variable valve-timing devices comprises steps of deciding clockwise rotation through a crank position sensor of a first camshaft variable valve-timing device and a hole sensor of a dowel pin(S10); deciding clockwise rotation through a crank position sensor of a second camshaft variable valve-timing device and a hole sensor of a dowel pin(S20); directing operation in an order of the first and second camshaft variable valve-timing devices, if the clockwise rotation of the first and second camshaft variable valve-timing devices is decided(S30); directing operation in an order of the first and second variable valve-timing devices, if first camshaft variable valve-timing device rotates clockwise and the second camshaft variable valve-timing device rotates counterclockwise(S40); directing operation in an order of the second and first variable valve-timing devices, if first camshaft variable valve-timing device rotates counterclockwise and the second camshaft variable valve-timing device rotates clockwise(S50); and directing operation in an order of the second and first variable valve-timing devices, if first camshaft variable valve-timing device rotates counterclockwise and the second camshaft variable valve-timing device rotates counterclockwise(S60).
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