... to 2-3 ton light-duty diesel vehicles. In the meantime, due to the change of ... surface nitriding treatment.·Piston top is of hot flow type, the skirt section has oval barrel curved ... main technical parameters of CY4102BQ Model CY4102BQ Type Vertical, in-line, water-cooled, four strokes, natural aspirated No. ... m passenger bus ect. CY4102 Vertical, in-line, water-cooled, four strokes, natural aspirated