In order to set a stage for what follows, let's first revisit some of the fundamentals involved in how valve timing relates to power output. And to further clarify how "power" is defined in the ...

Variable valve timing and lift can dramatically change an engine's power output and efficiency. Here's how they work.

Variable valve timing enables these different behaviours by changing how the intake and exhaust valves work at different engine speeds. Thus, it helps optimise the engine’s performance, whilst also ...

The other interesting valvetrain technology involves cam phasing -- adjusting the timing of when the valves open by rotating the camshaft sprocket forward or backward slightly.

Check out this article on variable valve timing systems from Honda's VTEC to Toyota's VVT-i and Nissan's CVTC, from Super Street Magazine.

Two of the ways in which this is achieved in a modern machine is through the use of Variable Valve Lift and Variable Valve Timing. If you guessed that these can adjust the timing of the valves and ...

Why Variable Valve Timing? Before exploring the virtues of the IVC system, we must first acknowledge the effect that valve events have on the internal combustion engine.

Variable Valve Timing Helps Chevrolets Breathe BetterClick to load comments for this story This enables Disqus, Inc. to process some of your data.

Variable valve timing, which is even used in your common garden-variety Camry, makes the engine more flexible in different conditions, which results in increased fuel economy, lower emissions and ...