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Variable valve lift (VVL) is an automotive piston engine technology which varies the height a valve opens in order to improve performance, fuel economy or emissions. There are two main types of VVL: discrete, which employs fixed valve lift amounts, and continuous, which is able to vary the amount of lift.
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.
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 ...
Honda wasn't the first or last to do variable valve timing and lift, but no one did it with such style.
2006 1.8 L R18A2 (Honda Civic) i-VTEC (EDM) 2006 2.0 L R20A1 (Honda Stream) i-VTEC; 2013 2.0 L R20A1 i-VTEC; i-VTEC. K-series. 01–11 K20A Integra TYPE-R; Civic TYPE-R; Accord Euro R (Japan) 02–04 K20A2 RSX Type S (America) 01+ K20A3 Integra IS (Japan) 01–06 K20A3 RSX Base, Civic Si (America) 03+ K20B 2.0l VTEC-i, Stream 4WD (Japan)
Honda: 2.4 L: Inline-four engine: Earth Dreams DOHC i-VTEC gasoline direct injection: Honda Accord Sport: Honda: 3.5 L: V6 engine: Earth Dreams SOHC VTEC: Honda Accord V6: Subaru (Fuji Heavy Industries) 2.0 L: Boxer-four engine: FA20D DOHC AVCS D4-S direct and port injection: Subaru BRZ: 2012 [13] Audi (Volkswagen Group) 3.0 L: V6 engine: V6 ...
In Honda's 2006 Civic Hybrid, the 1.3-liter i-VTEC engine uses a 3-stage valve design, an advancement from the 2005 i-VTEC technology. Aside from weight and friction reduction, the engine operates on either low-speed timing, high-output timing or 4-cylinder idling when the VCM system is engaged, each yielding better engine output upon varying ...
Three-stage VTEC is a multi-stage implementation of Honda's VTEC and VTEC-E (colloquially known as dual VTEC) technology, implemented in some of the company's D series engines from 1995 to the present day, allowing the engine to achieve both fuel efficiency and power. VTEC-E (for "Efficiency") is a form of VTEC that closes off one intake valve ...