Stroke of engine Vc TDC V a = Vc + V s D Stroke of engine (S) πD Vs = S hp BDC Stroke of engine Vc TDC V a = Vc + V s D Stroke of engine (S) πD Vs = S hp BDC Stroke of engine Vc TDC V a = Vc + V s D Stroke of engine (S) πD Vs = S hp BDC Stroke of engine Vc TDC V a = Vc + V s D Stroke of engine (S) πD Vs = S hp BDC