| 摘要 |
PROBLEM TO BE SOLVED: To provide an engine device having a supercharger which can execute an air flow rate control in good response to load variation in the operation in a middle load range.SOLUTION: An engine device 21 includes an exhaust bypass flow passage 18 connecting an exit of an exhaust manifold 44 and an exhaust exit of the supercharger 49. An exhaust bypass valve V3 is provided in the exhaust bypass flow passage 18. The engine device 21 further includes an air supply bypass passage 17 which bypasses a compressor 49b of a supercharger 49. An air supply bypass valve V2 is provided in the air supply bypass passage 17. In the middle and high load ranges, the exhaust bypass valve V3 and the air supply bypass valve V2 are individually controlled so that the pressure in an intake manifold 67 is set to a targe value according to a load. |
