INTERNAL COMBUSTION ENGINE AND CONTROL METHOD THEREOF

摘要

An electronic control unit (ECU) with a surge avoidance unit, wherein, when a turbocharge compressor enters a surging state during vehicle deceleration, the ECU acquires a first target opening degree of a nozzle vane in a turbine of the turbocharger based on an operation state and a first opening map as a surge avoidance control, controls the nozzle vane to a surge avoiding first target opening degree, if the first target opening degree is smaller than a predetermined surge avoiding first target opening degree, and controls the nozzle vane to the first target opening degree, if the first target opening degree is not less than the surge avoiding first target opening degree.

主权项

1. An internal combustion engine comprising:
a turbocharger having a turbine arranged in an exhaust gas passage and a compressor arranged in an intake gas passage and driven by the turbine; a turbine regulation switching device regulating an exhaust gas flow rate to be supplied to the turbine; and a control device controlling an opening degree of the turbine regulation switching device based on an operation state of the internal combustion engine and a first opening map, wherein when the control device determines whether or not the compressor enters a surging state during vehicle deceleration and determines that the compressor enters the surging state, the control device includes a surge avoidance unit configured to: acquire a first target opening degree based on the operation state and the first opening map, as a surge avoidance control for avoiding the compressor from entering the surging state and, if the first target opening degree is smaller than a predetermined surge avoiding first target opening degree, control the turbine regulation switching device to the surge avoiding first target opening degree, and control the turbine regulation switching device to the first target opening degree, if the first target opening degree is not less than the surge avoiding first target opening degree.