Electronic variable cam phaser
Delphi Power Train

The Delphi e-Phaser is an electronically driven variable cam phaser that is designed for use in a wide range of engine applications to help manufacturers reduce engine emissions and improve fuel economy.

Variable cam phasing changes the timing of an engine's valve lift event to improve engine efficiency, enhance idle stability and help the engine produce more torque and power. Compared with conventional hydraulic cam phasing, Delphi's innovative new e-Phaser achieves faster response times and provides an increased phasing range. It also provides extended usage range under hot engine conditions (low engine oil pressure), under cold engine conditions, at zero rpm, and at low speeds during engine stop and cranking.

Delphi's e-Phaser is facilitated by a unique harmonic drive single-stage gear, driven by a 3-phase brushless DC electric motor.