... structure,with two compression rings and one oil ring.·Valve mechanism is of overhead type.·Injection pump adopts Bosch A type ... main technical parameters of CY4102BQ Model CY4102BQ Type Vertical, in-line, water-cooled, four strokes, natural aspirated No. of cylinder-bore ... truck, 6-7 m passenger bus ect. CY4102 Vertical, in-line, water-cooled, four strokes, natural aspirated