| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To perform failure diagnosis accurately even at a transition time when turbine rotation speed changes in relation to a failure diagnosis device for an internal combustion engine provided with a turbocharger. <P>SOLUTION: Compressor passage gas flow rate (m dot comp) and model operation value of intake manifold pressure Pin are calculated by performing model operation including operation of angular velocityωs of a turbine shaft 32 in a loop. M dot comp is actually measured by a air flow meter 42 arranged on downstream of a compressor 28. Pin is actually measured by a suction pressure sensor 44 arranged in a downstream of a throttle valve 34. Failure is diagnosed based on whether or not difference between the actual measured value and the model operation value of m dot comp and difference between the actual measured value and the model operation value of Pin are within the normal range. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
