DESIGN METHOD OF SHORT DURATION CAM, SHORT DURATION CAM, VARIABLE VALVE LIFT APPARATUS INCLUDING THE SAME AND DESIGN METHOD OF SHORT DURATION CAM

• Main Authors: CHOI, BYONG YOUNG, LEE, JU HUN, WOO, SOO HYUNG, HAN, SEUNG KOOK, SON, JIN WOOK
• Format: Patent
• Language: English; Korean
• Published: 07.10.2015
• Subjects: BLASTING; CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES; ENGINE PLANTS IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; WEAPONS

The present invention relates to a design method of a short duration cam applied to a variable valve lift apparatus. The cap lift acceleration of the short duration cam according to the present invention is designed to form a first peak before the center of the cap lift acceleration and a second peak after the center of the cap lift acceleration. A relative rate of a large value to a small value in the first peak and the second peak is 0.8. 본 발명은 가변 밸브 리프트 장치에 적용되는 숏 듀레이션 캠의 설계 방법에 관한 것이다. 본 발명에 의한 숏 듀레이션 캠의 캠 리프트 가속도는 캠 리프트 가속도의 중심 이전에 제1 피크가 형성되도록 설계되고, 상기 캠 리프트 가속도의 중심 이후에 제2 피크가 형성되도록 설계되되, 상기 제1 피크와 상기 제2 피크 중 큰 값에 대한 작은 값의 상대 비율은 0.8 이상이다.