Page 362 - Cam Design Handbook

THB11 9/19/03 7:34 PM Page 350

350 CAM DESIGN HANDBOOK

Rocker arm

Coil spring

Valve stem
Pushrod

Hydraulic
lifter

Roller

Cam
FIGURE 11.23. Valve-gear component assembly.

TABLE 11.2 Inertial Parameters of Valve-gear System
Component Mass or Inertia
Hydraulic Lifter m l = 0.270lbm
Pushrod m pr = 0.114lbm
Rocker Arm J ra = 0.132lbm-in 2
Valve Stem m vs = 0.251lbm
Coil Spring m cs = 0.153lbm