Without variable valve timing, these intake and exhaust valves would operate in the same manner regardless of the engine’s RPM (revolutions per minute) speed or the driving environment. This isn’t ...

Among Honda's many technologies, none ranks as synonymous with the brand as VTEC. The company's unique, dynamically adjustable valvetrain is, in large part, what helped make '90s-era Civics and ...

The Mitchell mechanical Variable Valve Timing (VVT) system is described. The way in which it exploits variable angular velocity to change valve timing is explained. The system was used in a programme ...

Most modern variable valve-timing (VVT) systems use a cam phaser that rotates the position of each cam­shaft relative to the timing chain. Think of making a record turntable go faster or slower by ...

Honda's golden age commenced when it introduced the B-Series, the first production engine with variable valve timing and electronic lift control, otherwise known as Honda's VTEC system. The Honda B-16 ...

March 30, 2007 Over the last century of automobile development, we have seen an enormous range of valve actuation technologies, ranging from pushrod, through single then double overhead camshafts, ...

Honda was on to a winner when it devised its VTEC engine solution, and it’s leaned heavily on this technology for many years. From the nineties, it was able to give simple Civics the ability to scream ...

GM has announced that all V-8 powered Chevrolet and GMC trucks now feature variable valve timing (VVT) for the 2010 model year. A quick trip back to engineering 101 reminds us that VVT is a piston ...