Invention Grant
- Patent Title: Method of two-step VVL lift malfunction avoidance learning control and electric two-step VVL system thereof
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Application No.: US16698172Application Date: 2019-11-27
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Publication No.: US11313288B2Publication Date: 2022-04-26
- Inventor: Jae-Hyeok Song
- Applicant: HYUNDAI MOTOR COMPANY , KIA MOTORS CORPORATION
- Applicant Address: KR Seoul; KR Seoul
- Assignee: HYUNDAI MOTOR COMPANY,KIA MOTORS CORPORATION
- Current Assignee: HYUNDAI MOTOR COMPANY,KIA MOTORS CORPORATION
- Current Assignee Address: KR Seoul; KR Seoul
- Agency: Lempia Summerfield Katz LLC
- Priority: KR10-2019-0081913 20190708
- Main IPC: F01L1/34
- IPC: F01L1/34 ; F02D13/02 ; F02D41/00 ; F01L13/00 ; B60W10/06 ; B60W10/08 ; B60W20/15

Abstract:
A method of two-step variable valve lift (VVL) malfunction avoidance learning control may include: in a two-step VVL system which is operated with a main lift and a secondary lift, verifying, by an electronic control unit (ECU), an operation avoidance area based on locking of a lock pin of a cam follower ; performing VVL operation learning, in which a failure of occurrence of the second lift is determined on the basis of a locking failure of the cam follower due to an initially set value of the operation avoidance area; and reflecting the operation avoidance area to the two-step VVL system with a corrected set value which is obtained through the VVL operation learning.
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