CAM DESIGN AND MANUFACTURING FOR A HOMOGENEOUS CHARGE COMPRESSION IGNITION GASOLINE ENGINE


ÇINAR C. , UYUMAZ A.

JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, cilt.29, sa.1, ss.15-22, 2014 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 29 Konu: 1
  • Basım Tarihi: 2014
  • Dergi Adı: JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY
  • Sayfa Sayıları: ss.15-22

Özet

In this study, cams were designed and manufactured for a homogenous charge compression ignition (HCCI) gasoline engine. Low lift cams were designed accordance with HCCI combustion characteristics for 38 mm base circular diameter, 124 degrees dwell angle, 3.5, 5.5 and 7.5 mm valve lifts. Generic geometric models of cam profiles were obtained using circular arc curves. Obtained models were fitted with fourier series and circular arc curve was derived from the corresponding equations. Speed, acceleration and jerk effects of the follower were investigated for designed cam profiles. Obtained results were compared with cams obtained by 5th degree classical spline method. It has been shown that feature a single point of contact of cam into the follower has been lost and acceleration and jerk values of the follower increased so much as long as valve lift increase in the cam profiles obtained by classical spline functions. It has been shown that feature a single point of contact of cam into the follower has not been lost by fitting fourier series of obtained geometric model of cam profile even high valve lifts. Friction and inertia forces decreased due to the low speed and acceleration operation.