A piston tribodynamic model with deterministic consideration of skirt surface grooves

• Published in: Tribology international Vol. 110; pp. 232 - 251
• Main Authors: Fang, Congcong, Meng, Xianghui, Xie, Youbai
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.06.2017; Elsevier BV
• Subjects: Differential equations; Engines; Finite element analysis; Finite element method; Grooves; Internal combustion engines; Jacobi matrix method; Jacobian matrix; Lagrange multiplier; Lubricants & lubrication; Lubrication; Machining; Mathematical models; MEBDF; Multibody dynamics; Piston skirt; Studies; Surface grooves; Time integration; Tribology; MEBDF; Surface grooves; Multibody dynamics; Piston skirt
• ISSN: 0301-679X; 1879-2464
• DOI: 10.1016/j.triboint.2017.02.026

The machining micro-grooves on the piston skirt surface are very common in internal combustion engines. To accurately investigate the influence of the grooves on piston tribodynamic performance, a coupling model of piston skirt-liner lubrication and crank-rod-piston multibody dynamics is built in this study. The lubrication model is solved by the Finite Element Method with deterministic treatment of the grooves. The multibody dynamics equations are formulated with Lagrange multipliers and constraint Jacobian matrix in the form of Differential Algebraic Equations (DAEs). The MEBDF approach is applied to a high efficient time integration of the DAEs. Based on the above model, the influences of grooves and some groove parameters on piston skirt-liner lubrication as well as piston slap are studied and revealed. •A piston tribodynamic model with deterministic skirt surface cut-grooves is built.•The MEBDF is applied to high efficient solution of multibody dynamics equations.•The influencing mechanisms of clearance and grooves are compared and distinguished.•Some groove parameters are investigated.