| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an engine capable of detecting the air-fuel ratio of exhaust gas exhausted from a plurality of cylinders for each cylinder while suppressing pressure loss of exhaust gas.SOLUTION: In an exhaust device of an engine having four cylinders detecting an air-fuel ratio in an exhaust collection part, between a third cylinder #3 and a fourth cylinder #4 whose exhaust periods are overlapped, the opening valve timing of an exhaust valve of the fourth cylinder #4 performing exhaust later, with respect to a bottom dead center (BDC) is set earlier than the opening valve timing of the exhaust valve of the third cylinder #3 performing exhaust ahead, with respect to the bottom dead center (BDC).</p> |
