Abstract :
Cam mechanisms are mechanical systems used to perform the periodic reciprocal motions needed in several machines. In a cam mechanism the function of the cam profile is providing the desired kinematic properties to the motion. There are several methods used in the design of single-dwell cam profiles. In these study, the cam profiles were designed regarding 2,338 radian (134°) cam angle (lifted-valve period) and 5,6,7 mm valve strokes for internal combustion engine. The double harmonic motion and 3-4-5-6 polynomial methods were used to design of cam profiles. The minimum base circle diameters were determined for each cam profile. The velocity and acceleration characteristics of the cam follower for 1500 rpm speed were determined, and compared with each other. The minimum cam base circle diameters were determined 24, 28, 34 mm for 5, 6, 7 mm valve strokes, respectively. It was seen that 32, 36, 42 mm cam base circle diameters were appropriate for 5, 6, 7 mm valve strokes with 3-4-5-6 polynomial method.
NaturalLanguageKeyword :
The base circle diameter , valve stroke , velocity , acceleration
