The inlet and exhaust valve timing of a piston engine plays a large role in engine performance. Many modern automotive engines have some sort of variable valve timing, but the valves are still mech… ...

Like the GM and Ford implementations, the single-cam pushrod engine relies on a control valve/solenoid and a phaser. ... It is possible to vary the exhaust timing up to 45 degrees, ...

Variable valve timing and lift Somewhere there's a perfect balance between peak horsepower, low-speed response, reduced emissions, and something you can afford. MotorTrend ...

You'll also find them in emissions control systems, managing exhaust gas recirculation (EGR), and in Honda VTEC and Toyota VVT-I variable valve timing (VVT) systems.In the Chrysler 5.7-liter HEMI ...

We test GM's new variable valve timing system and get dozens of horsepower with not sacrificing and torque. Only at www.hotrod.com, the official website for Hot Rod Magazine.

VTEC is an acronym for a variable valve-timing system used on Honda and Acura models since 1989. The full name is variable valve timing and lift electronic control, and the first U.S. model with ...

Specifically, that allowed Porsche to alters the intake valves' timing relative to the position of the pistons in the cylinder as well as the timing of the exhaust valves.

In last month's "Tech Scene," we compared the differences between Toyota's VVTL-i (Variable Valve Timing and Lift-intelligence) and Honda's VTEC (Variable Valve Timing and lift Electronic Control).

For the engine’s intake valve timing, BorgWarner supplies a variable force solenoid (VFS) and patented passive torsional assist (TA) phaser with mid-position lock (MPL) and integrated center ...