| 摘要 |
<p>The present disclosure provides a boost pressure diagnostic apparatus for an internal combustion engine comprising a forced induction device (19). A boost pressure sensor (21) detects a pressure between the forced induction device (19) and a throttle valve (15). A throttle valve opening degree sensor (15b,15c) detects a throttle valve opening degree of the throttle valve. A bypass valve opening degree sensor (25b,25c) detects a bypass valve opening degree of a bypass valve (25). A control unit (30) determines that the pressure between the forced induction device (19) and the throttle valve (15) is abnormal upon the boost pressure sensor (21) detecting that the pressure between the forced induction device (19) and the throttle valve (15) is equal to or larger than a prescribed value, the throttle valve opening degree sensor (15b,15c) detecting that the throttle valve opening degree is in a prescribed throttle valve opening degree range, and the bypass valve opening degree sensor (25b,25c) detecting that the bypass valve opening degree is in a prescribed bypass valve opening degree range.</p> |
