... to 2-3 ton light-duty diesel vehicles. In the meantime, due to the change of ... with two compression rings and one oil ring.·Valve mechanism is of overhead type.·Injection pump adopts ... 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