| 摘要 |
PURPOSE:To improve characteristics of a gaseous mixture in a suction equipment which contains suction passages for low loads and high loads by shaping an outflow opening of the low load passage to protuberate in the form of an opening nozzle inside the high load suction passage. CONSTITUTION:In low or intermediate load range, a secondary suction passage 12 for high loads of mixture is susceptible to leakage. An outflow opening 10p of a primary suction passage 10 for low loads and an outflow opening 18p of an auxiliary suction passage 18 are projected into an outflow opening 12p and the opening 10p is protuberated to form an opening 14. Both the openings are disposed close to a combustion chamber 2 and the protruberant opening 14 functions as a throttle 16, thereby preventing the air leakage in the secondary side. A suction air effectively produces a swirl because both the outflow openings are oriented in the circumferential direction of the combustion camber 2. In addition, the protruberant opening 14, made on the inwall of the passage 12, directs a secondary suction air in said circumferential direction, so that the swirl may not be damped even in a high load range. |
