Lg Electronics Inc.

Hyundai Motor Company

Snu Rdb Foundation

Seonguk Kim

Hyungjin Kim

Jinsool Lee

Jaeyeon Kim

Kyoung Doug Min

Jang Heon Kim

Seung Mok Choi

Charging case for sleep-inducing earbud

An accelerator sensor that is mounted on an engine block may be used to detect vibration of a compression ignition engine, and the detected vibration signal is analyzed to determine the combustion timing of the engine. A method for detecting combustion timing may include measuring a block vibration signal generated in a combustion process of an engine, setting up a frequency area that is to be analyzed in the block vibration to divide the frequency area into wavelet scales, executing continuous wavelet transformations of the divided wavelet scales to extract respective result values thereof and to calculate differences between former result values and latter result values, comparing the calculated difference value with a predetermined value to store crank angles of pertinent timing if the calculated difference values exceed the predetermined value, and averaging the stored crank angles to determine combustion timing in a case that all wavelet scales are processed.

Method for detecting combustion timing and system thereof

Growing community of inventors

Seoul, South Korea

Seonguk Kim