VCT System plays an important function of valve opening as it efficiently maintains the timing of the valve’s opening and closing. It cannot vary the valve lift, unlike cam changing VVT; however, VCT is the simplest and cheapest form of VVT because each camshaft needs only one VCT system, unlike other systems that employ an individual mechanism for every cylinder. Another noteworthy feature of the VCT system is that it increases internal residual gas by affecting the intake, combustion, and ... Read more