Tribology is one element of many interacting within a vehicle engine and powertrain. In adopting a detailed, theoretical, component approach to solving tribological problems, the minutiae can be overwhelmingly complex and practical solutions become elusive and uneconomic. The system perspective generally adopted in industry, can lead to shortcuts and oversimplifications, industrial projects are subject to ad hoc trial and error, and subsequent ‘fire-fighting’ activity is required. This book seeks to bridge this divide, using a multi-physics approach to provide sufficient fundamental grounding and understanding of both detailed and approximate analyses – thereby making ‘first time right’ design solutions possible. Tribological issues and solutions in piston systems, valve train systems, engine bearings and drivetrain systems are addressed. New developments in materials, micro-engineering, nano-technology and MEMS are also included.
Author(s): Homer Rahnejat
Publisher: Woodhead Publishing
Year: 2010
Language: English
Pages: 1056
Tags: Транспорт;Двигатели внутреннего сгорания (ДВС);Надежность ДВС;
Part 1 Introduction to multi-physics and tribology within the multi-physics environment: An introduction to the multi-physics mutli-scale approach. Section 1.1 Fundamentals of tribology and dynamics: Mechanism and laws of friction and wear; Surface phenomena in thin-film tribology; Fundamentals of impact dynamics of semi-infinite and layered solids; Fluid film lubrication; Elastohydrodynamic lubrication; Measurement of contact pressure under elastohydrodynamic lubrication conditions. Part 2 Engine and powertrain technologies and applications: Section 2.1 Overview: Tribological considerations in internal combustion engines; Predictive methods for tribological performance in internal combustion (IC) engines. Section 2.2 Tribology of piston systems: Fundamentals of lubrication and friction of piston ring contact; Measurement techniques for piston ring tribology; An ultrasonic approach for the measurement of oil films in the piston zone; Surface texturing for in-cylinder friction reduction; Optimised textured surfaces with application in piston-ring/cylinder liner contact; Transient thermo-elastohydrohynamics of rough piston ring conjunction. Section 2.3 Valve train systems: A multi-scale approach to analysis of valve train systems. Section 2.4 Engine bearings: Fundamentals of hydrodynamic journal bearings: An analytical approach; Practical tribological issues in big-end bearings; Tribology of big-end bearings. Section 2.5 Drivetrain systems: An introduction to noise and vibration issues in the automotive drivetrain and the role of tribology; Friction lining characteristics and the clutch take-up judder phenomenon with manual transmission; Contact mechanics of tyre–road interactions and its role in vehicle shuffle; Tribology of differentials and traction control devices; Non-linear dynamics of gear meshing and vibro-impact phenomenon; Rattle and clatter noise in powertrains – automotive transmissions; Various forms of transmission rattle in automotive powertrains; Dual mass flywheel (DMF) as a means of attenuating rattle; Multi-physics approach for analysis of transmission rattle; High-energy impact-induced phenomena in driveline clonk; Tribo-elasto-multi-body dynamics of a single cylinder engine under fired condition. Part 3 Micro-systems and nano-conjunctions: Microengines and gears; Small-scale surface engineering problems.
