Professor Nicola Mulder BSc (Hons) PhD (Cape Town ...
To optimise valve overlap and utilise exhaust pulsation to enhance cylinder filling at high engine speeds, the FA20D engine had variable intake and exhaust valve timing, known as Subaru's 'Dual Active Valve Control System' (D-AVCS). For the FA20D engine, the intake camshaft had a 60 degree range of adjustment (relative to crankshaft angle ...
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