| 摘要 |
Provided is an engine system capable of ensuring a sufficient boost pressure during engine braking and improving a braking force of a compression release brake. The engine system includes: a compression release brake device (19) that operates a compression release brake to obtain a braking force during engine braking by forcibly opening an exhaust valve (24)and releasing a compressive pressure near a compression top dead center of an engine (E); a power-assisted turbocharger (2) including a turbine (3) disposed on an exhaust passage (6) of the engine (E) and driven by exhaust, a compressor (4) disposed on an intake passage (7) and driven by a rotational torque of the turbine (3), and an electric motor (5) that assists a drive force of the compressor (4); and an electric motor control unit (22) that drives the electric motor (5) when the compressor release brake is operated. |
