Method of controlling lock pin of continuously variable valve timing system
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsChung Han Oh, Min Su Park, Yun Seok Kim
Life of this patent
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Abstract
A method of controlling a lock pin of a CVVT (continuous variable valve timing) system is provided. The method includes an oil supply operation of operating a spool of a valve bolt by means of oil drawn into the CVVT system and supplying the oil to the lock pin and a switching valve. The method further includes a switching-valve opening operation of opening the switching valve by means of pressure of the oil supplied in the oil supply operation, and a lock-pin releasing operation of supplying oil to a chamber when the switching valve opens and releasing the lock-pin when there is no difference in oil pressure between an advanced chamber and a retracted chamber.
Claims8
A method of controlling a lock pin of a continuous variable valve timing (CVVT) system, comprising:
- an oil supply operation of operating a spool of a valve bolt utilizing oil drawn into the CVVT system, and supplying the oil to the lock pin and a switching valve;
- a switching-valve opening operation of opening the switching valve by means of pressure of the oil supplied in the oil supply operation;
- and
- a lock-pin releasing operation of supplying oil to a chamber when the switching valve opens, and releasing the lock pin when there is no difference in oil pressure between an advanced chamber and a retarded chamber.
A method of controlling a lock pin of a continuous variable valve timing (CVVT) system drawing in oil, the CVVT system including a valve bolt having a spool, a locking pin, a switching valve, and a chamber having an advanced chamber and a retarded chamber, the method comprising:
- operating the spool of the valve bolt utilizing the oil;
- supplying the oil to the lock pin and the switching valve;
- opening the switching valve by utilizing the oil supplied to the lock pin and the switching valve;
- supplying oil to the chamber when the switching valve opens;
- and
- releasing the lock pin when there is no difference in oil pressure between the advanced chamber and the retarded chamber.
Dependencies are inferred from the claim text.