A simulation model of valve train dynamics was developed in order to investigate the vibrational behavior of a valve train under heavy normal load, especially for heavy-duty diesel engines. The nonlinear multi-degree-of-freedom model developed for this study uses input data resulting from the kinematic analysis. The valve spring was modeled as a distributed parameter system rather than a lumped mass system. The stiffness constants of each valve train component were theoretically obtained as nonlinear values. The partial differential equation describing the motion of the spring and the ordinary differential equations for other components, which were considered as a lumped mass system, were solved simultaneously without any iterations by using the numerical “Time Marching Step” method. The results of this simulation, which treated the elastic characteristics of each component as nonlinear, were more accurate than the previous studies that used simple linear elastic models.

1.
Adam
M.
,
Bakaj
L.
, and
Woyand
H. B.
,
1990
, “
Application of Numerical Simulation for the Analysis of the Dynamic Behavior of Valve Train Systems
,”
International Journal of Vehicle Design
, Vol.
11
, No.
3
, pp.
281
292
.
2.
Akiba, K., and Shimizu, A., 1981, “A Comprehensive Simulation of High Speed Driven Valve Trains,” SAE Paper No. 810865.
3.
Akiba, K., and Kakiuchi, T., 1988, “A Dynamic Study of Engine Valving Mechanisms: Determination of the Impulse Force Acting on the Valve,” SAE Paper No. 880389.
4.
Barkan
P.
,
1954
, “
Calculation of High Speed Valve Motion With a Flexible Overhead Linkage
,”
Transactions of SAE
, Vol.
61
, pp.
687
700
.
5.
Chan
C.
, and
Pisano
A.
,
1987
, “
Dynamic Model of a Fluctuating Rocker Arm Ratio Cam System
,”
ASME Journal of Mechanisms, Transmissions, and Automation in Design
, Vol.
109
, pp.
356
365
.
6.
Chen
F. Y.
,
1975
, “
Dynamics of High Speed Cam-Driven Mechanisms
,”
ASME Journal of Engineering for Industry
, Vol.
97
, pp.
769
776
.
7.
Chen, F. Y., 1982, Mechanics and Design of Cam Mechanisms, Pergamon Press, New York.
8.
Gerald, C. F., and Wheatley, P. O., 1989, Applied Numerical Analysis, 4th ed., Addison-Wesley, Boston, MA.
9.
Hrones
J. A.
,
1948
, “
An Analysis of the Dynamic Forces in a Cam Driven System
,”
Transactions of the ASME
, Vol.
70
, pp.
473
482
.
10.
Hundal, M. S., 1999, “Aid of Digital Computer in the Analysis of Rigid Spring-Loaded Valve Mechanisms,” Applications of Computers in Valve Gear Design, SAE, pp. 4–8.
11.
Johnson, G. I., 1999, “Studying Valve Dynamics With Electronic Computers,” Applications of Computers in Valve Gear Design, SAE, pp. 10–25.
12.
Kurisu, T., Hatamura, K., and Omoti, H., 1991, “A Study of Jump and Bounce in a Valve Train,” SAE Paper No. 910426.
13.
Lee, J., Patterson, D. J., Morrison, K. M., and Schwartz, G. B., 1994, “Friction Measurement in the Valve Train With a Roller Follower,” SAE Paper No. 940589.
14.
Phlips, P. J., Schamel, A. R., and Meyer, J., 1988, “An Efficient Model for Valve Train and Spring Dynamics,” SAE Paper No. 880619.
15.
Pisano
A. P.
, and
Freudenstein
F.
,
1983
, “
An Experimental and Analytical Investigation of the Dynamic Response of a High-Speed Cam Follower System: Parts I and II
,”
ASME Journal of Mechanisms, Transmissions, and Automation in Design
, Vol.
105
, No.
4
, pp.
699
704
.
16.
Pisano
A. P.
,
1984
, “
Coulomb Friction in High-Speed Cam Systems
,”
ASME Journal of Mechanisms, Transmissions, and Automation in Design
, Vol.
106
, pp.
470
474
.
17.
Roark, R. J., and Young, W. C., 1975, Formulas for Stress and Strain, 5th ed., McGraw-Hill, New York.
This content is only available via PDF.
You do not currently have access to this content.