The Story of Greet VTEC ENGINE

What is VTEC
The Legenery VTEC (Variable Valve Timing and Lift Electronic Control) is a valvetrain system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine. This system uses two camshaft profiles and electronically selects between the profiles. It was invented by Honda R&D engineer Ikuo Kajitani. It can be said that VTEC, the original Honda variable valve control system, originated from REV (Revolution-modulated valve control) introduced on the CBR400 in 1983 known as HYPER VTEC.

Honda's VTec is a enginering system originally designed for their engines to keep their great fuel economy, while giving extra power at higher rpm's. when the vtech is activated, oil pressure within the head increases to add a larger stroke to lobes on the cams, therefore letting more air in and out of the engine. Here the story of greet VTec Engine.

 

VTEC was the first system of its kind, though other variable valve timing and lift control systems have been produced by other manufacturers (MIVEC from Mitsubishi, VVTL-i from Toyota, VarioCam Plus from Porsche, VVL from Nissan, etc).

 

 

A cylinder head sliced in half shows 2 overhead camshafts (One above each of the two valves)

  

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