... ring.·Valve mechanism is of overhead type.·Injection pump adopts Bosch A type pump.·Injector is of long body closed type ... of CY4102BQ Model CY4102BQ Type Vertical, in-line, water-cooled, four strokes, natural aspirated No. of cylinder-bore×stroke 4—102 ... m passenger bus ect. CY4102 Vertical, in-line, water-cooled, four strokes, natural aspirated