The VC-T Also Is a Miller-Cycle Engine

Like most modern engines, the VC-T is fitted with cam phasers to rotate its intake and exhaust camshafts to affect valve timing. However, the intake phaser is electrically activated rather than hydraulically as on the exhaust side. This not only achieves quicker response but also gives that phaser a 70-degree range of motion instead of the usual 50 degrees on the exhaust camshaft.



That’s enough to delay the intake valve closing sufficiently during low power needs to reduce pumping losses and achieve Miller cycle operation. Doing so combines with high-compression-ratio operation to enhance fuel savings during easy driving.