| 摘要 |
PURPOSE:To obtain a large output effect due to supercharging effect preponderantly in a medium speed normally using rotation region and set a high torque type engine by generating both inertial supercharging effect and resonant supercharging effect in a relatively close rotation regions respectively. CONSTITUTION:The inertia synchronized number of rotation of an air column vibration system on the lower course sides of surge tanks 3, 4, which is determined by the length l1 and area A1 of the air intake passages 2a-2f which are connected to cylinders 1A-1F and divided into two cylinder groups whose suction strokes do not substantially overlap, is determined as N1, and the resonance synchronized number of rotation of an air column vibration system on the upper course sides of the surge tanks 3, 4, which is determined by the volumes of the surge tanks 3, 4 and air intake passages 2a-2f and the length l2 and area A2 of air intake passages 5, 6 up to a confluence part 7, is determined as N2. In this case, the N1 is set at 3,000-5,000r.p.m. as well as in a condition that N2>=N1X0.7. Also, each area A2 is set to a smaller value than the sum of each area A1, i.e., A1X3. |
