| 摘要 |
A compressor (5) for a turbo supercharger (3) is positioned between an airflow meter (12) and a throttle valve (13). An EGR passage (21) is connected to an air intake passage (10) at a convergence point (22) upstream from the compressor (5). The air intake passage capacity (V1) from the airflow meter (12) to the convergence point (22), the air intake passage capacity (V2) from the compressor (5) to the throttle valve (13), and the maximum boost pressure (Pb) under operating conditions whereby EGR is introduced are set so as to fulfill the relationship in formula (1), such that new air including EGR gas does not blow back up to the airflow meter (12) even at the maximum boost pressure (Pb). |
