Engine system as well as running state optimal control method and device thereof

The present invention discloses an engine operating condition optimization control method, comprising the steps of: a first pre-calibrated supercharging pressure threshold pmin is based on the air filter to the conduit; collecting current intake air pressure P and the booster ambient pressure pe, and the pressure difference obtained between the two Delta] p; Delta] p in the pressure difference is less than the first threshold value pmin pressure condition, the air filter to obtain a first judgment result is pressurized line to be maintenance; first determination in accordance with the As a result, the output control signal controls the engine at a high non-load state. The present invention can effectively solve the problems affecting the leak conduit turbocharger and engine operating conditions between the air cleaner to the turbocharger. On this basis, the present invention also provides a method of operating state of the engine to optimize engine system control device of the control device and its application.