| 发明名称 |
METHOD AND SYSTEM FOR DETECTING MALFUNCTION OF FASTENING BOLT IN CVVT |
| 摘要 |
A method for detecting malfunction of a fastening bolt in a continuous variable valve timing (CVVT) includes: deciding whether a camshaft position sensor is operating normally; learning the most retarded angle position of the camshaft using the camshaft position sensor; deciding whether the learning of the most retarded angle position of the camshaft is normal; and comparing a PWM duty value used in the learning with a set first reference value when the learning of the most retarded angle position of the camshaft is normal. |
| 申请公布号 |
US2016146071(A1) |
申请公布日期 |
2016.05.26 |
| 申请号 |
US201514720689 |
申请日期 |
2015.05.22 |
| 申请人 |
HYUNDAI MOTOR COMPANY ;KIA MOTORS CORPORATION |
发明人 |
KIM Seung Bum |
| 分类号 |
F01L3/24;F01L13/00;G01M15/06 |
主分类号 |
F01L3/24 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method for detecting malfunction of a fastening bolt in a continuous variable valve timing (CVVT), the method comprising:
determining whether a camshaft position sensor is operating normally; learning the most retarded angle position of a camshaft using the camshaft position sensor; determining whether the learning of the most retarded angle position of the camshaft is normal; and comparing a PWM duty value used in the learning with a first reference value when the learning of the most retarded angle position of the camshaft is normal. |
| 地址 |
Seoul KR |
