| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a detection device capable of detecting abnormality of a passage selector valve without a problem relating to a location where a position sensor for the passage selector valve is installed in devices detecting abnormality of the passage selector valve provided in an exhaust system of an internal combustion engine. <P>SOLUTION: This abnormality detection device detects abnormality of the passage selector valve provided in the exhaust system of the internal combustion engine, is provided with a cylinder pressure detection means detecting cylinder pressure Pm, and detects abnormality of the passage selector valve (S50) based on a result of comparison of cylinder pressure during exhaust stroke and predetermined value Ps (S40). <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
