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A Honda K24A Engine with i-VTEC. VTEC (described as Variable Valve Timing & Lift Electronic Control, but stands for Valve Timing Electronically Controlled) is a system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine, resulting in higher performance at high RPM, and lower fuel consumption at low RPM.
2.4 DOHC i-VTEC. i-VTEC is the acronym for intelligent VTEC (Variable Valve Timing and Lift Electronic Control), an evolution of Honda's VTEC engine. The i-VTEC engine works by controlling the timing and lifting of the camshafts depending on engine speeds.
91–96 H22A Prelude Si VTEC (Japan) 94–97 H22A Accord SiR (Japan) 97–01 H22A Prelude SiR, SiR S-spec, Type S (Japan) 00–02 H22A Accord Euro R (Europe) 93–96 H22A1 Prelude VTEC (America) 93–96 H20A4 Modified Prelude VTEC (America) 97–98 H22A1 Prelude VTiR (Australia) 93–96 H22A2 Prelude 2.2i VTEC (Europe) 1996 H22A3 Prelude VTEC (KU)
Honda wasn't the first or last to do variable valve timing and lift, but no one did it with such style.
Honda K24A4 2.4L DOHC i-VTEC Engine installed in 2003 Honda Accord. The Honda K-series engine is a line of four-cylinder four-stroke car engine introduced in 2001. The K-series engines are equipped with DOHC valvetrains and use roller rockers on the cylinder head to reduce friction.
Variable Cylinder Management (VCM) is Honda's term for its variable displacement technology, which saves fuel by using the i-VTEC system to disable one bank of cylinders during specific driving conditions—for example, highway driving. The second version of VCM (VCM-2) took this a step further, allowing the engine to go from 6 cylinders, down ...
In 1989, Honda released the VTEC system. [13] While the earlier Nissan NVCS alters the phasing of the camshaft, VTEC switches to a separate cam profile at high engine speeds to improve peak power. The first VTEC engine Honda produced was the B16A which was installed in the Integra, CRX, and Civic hatchback available in Japan and Europe ...
It is fuel injected, has an aluminum-alloy cylinder block and cylinder head, is a SOHC 16-valve design (four valves per cylinder) and utilizes Honda's i-VTEC system. The R series engine has a compression ratio of 10.5:1, features a " drive by wire " throttle system which is computer controlled to reduce pumping losses and create a smooth torque ...