Hyundai Motor Company

Kia Motors Corporation

Dong Hoon Seok

Dongheon Park

Young Kyu Oh

Il Joong Hwang

Chulho Yu

Yoonho Cho

An engine having a variable valve timing mechanism may include a camshaft having a cam formed thereon for moving an intake or exhaust valve, a variable rotation unit disposed on the same axis with the camshaft to rotate the camshaft to have a retard angle chamber and an advance angle chamber for controlling a retard angle and an advance angle of the camshaft, a variable valve bolt having a fastening portion for fastening the variable rotation unit to the camshaft, and an oil control valve for making selective supply of hydraulic oil to the retard angle chamber and the advance angle chamber, and a valve controller disposed on an outer side of the variable rotation unit for controlling the oil control valve in the variable valve bolt.

Growing community of inventors

Whasung-Si, South Korea

Dong Hoon Seok