Variable Valve Timing (VVT), Does Away With Fixed Values of a Camshaft.
Back in the day, a car’s intake and exhaust valves opened a specific amount at a specific point in the four stroke cycle, and for a specific amount of time. It was that simple.
Nowadays, however, many engines can not only change when their valves open, but also how much they open and for how long – that is, new cars can change valve timing, valve lift, and valve duration. As great as variable valve timing (VVT) is, it is also vulnerable to some problems.
Now let’s talk about: Variable Valve Timing (VVT).
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