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Engine Systems

The Combustion Engine

A Drive with a Future

I. Introduction

II. Legislation and technical development

Figure 1 Schematic depiction of the NEDC, WLTC and RDE-relevant performance map ranges


III. Friction reduction

Figure 2 Savings with balancer shaft systems with rolling bearings

Figure 3 Benefits of a turbocharger with rolling bearings

Figure 4 Three-cylinder engine with a rolling bearing at the first main bearing position

IV. Regenerative braking via the belt-driven starter-alternator

Figure 5 Accessory drive with P0 hybridization

Figure 6 Tensioning systems and decouplers for P0 systems

V. Variable valvetrain

Figure 7 Variable valvetrain – Schaeffler’s portfolio

Figure 8 Electric camshaft phaser: Expansion of operating ranges (left) and higher phasing dynamics (right)

VI. Cylinder-individual valve control with switchable roller type finger followers and the UniAir system

Figure 9 Switchable roller finger followers considerably reduce engine-out NOx emissions on a diesel engine

Figure 10 UniAir variable valvetrain for all requirements

VII. Rolling cylinder deactivation improves efficiency of small engines

Figure 11 Prototype engine used to investigate the rolling cylinder deactivation system

Figure 12 Comparison of operating ranges for static and rolling cylinder deactivation

VIII. The ideal combustion engine in a full hybrid system

Figure 13 Comparison of different hybrid architectures

IX. Summary and outlook

The digital version of the Schaeffler Symposium 2018 “Mobility for Tomorrow” conference transcript

VII. Rolling cylinder deactivation improves efficiency of small engines