The Honda i-VTEC camshaft timing setup was the first to be updated from the original VTEC engine system, VTEC is an acronym for continuously variable camshaft timing used by several Honda engines. The technology was introduced in Honda’s K-series four cylinder engine family, before the V6 received it in 2002.
The intake camshaft is now capable of advancing between 25 and 50 degrees from an idle during operation. Timing changes are controlled by an engine computer control module. Timing is determined by a combination of engine loads and rpms, ranging from WOT (wide open throttle) to an idle. The effect causes the engine more advancement of the distribution of torque output, especially at low and mid-range RPMs.
In 2004, Honda introduced the updated version of the i-VTEC V6, the i-VTEC referred to as Honda’s ‘cylinder rotation technology’ which closes the valves on one row of three cylinders (on a V-6 engine) during light loads and lower speeds. The technology was first brought to the US in the Odyssey, and can now be found built right into the Honda Hybrid and the 2006 Honda Pilot.
With the continued introduction of vastly different i-VTEC systems, one may assume that the term is now a standard phrase for creative valve control technologies from Honda.
To simplify the terms, the computer uses input signals from sensors which are located in various spots other than on the engine and monitor every function of the engine. It then min-adjusts through the main Engine Control Module every aspect of valve timing to suit the exact situation the engine may be in.
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