Piston Secondary Dynamics Considering Elastohydrodynamic Lubrication Federal-Mogul Corporation

Format:

Conference/Event

Author/Creator:

Shah, Paras, author.

Conference Name:

SAE World Congress & Exhibition (2007-04-16 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2007

Summary:

An analytical method is presented in this paper for simulating piston secondary dynamics and piston-bore contact for an asymmetric half piston model including elastohydrodynamic (EHD) lubrication at the bore-skirt interface. A piston EHD analysis is used based on a finite-difference formulation. The oil film is discretized using a two-dimensional mesh. For improved computational efficiency without loss of accuracy, the Reynolds' equation is solved using a perturbation approach which utilizes an "influence zone" concept, and a successive over-relaxation solver. The analysis includes several important physical attributes such as bore distortion effects due to mechanical and thermal deformation, inertia loading and piston barrelity and ovality. A Newmark-Beta time integration scheme combined with a Newton-Raphson linearization, calculates the piston secondary motion. The EHD behavior is coupled with a contact algorithm at the piston-bore interface as well as the piston secondary dynamics. The effects of some piston design parameters such as piston pin offset, clearance and location of cylinder peak pressure are investigated

Notes:

Vendor supplied data

Publisher Number:

2007-01-1251

Access Restriction:

Restricted for use by site license