| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device of an engine which improves estimation accuracy of a concentration of purge gas.SOLUTION: A control device of an engine which introduces purge gas containing evaporated fuel from a fuel tank 28 to an intake system includes: air-fuel ratio calculation means 2 for calculating an air-fuel ratio of the engine; and purge ratio calculation means 3 for calculating a purge ratio corresponding to an introduction proportion of the purge gas. Further, the control device of the engine includes concentration calculation means 4 for calculating the concentration of the purge gas on the basis of the air-fuel ratio calculated by the air-fuel ratio calculation means 2 and the purge ratio calculated by the purge ratio calculation means 3. Furthermore, the control device of the engine includes determination means 6 for permitting or inhibiting the calculation of the concentration on the concentration calculation means 4 on the basis of the purge ratio calculated by the purge ratio calculation means 3. |
