Turbocharger device and control method for reducing oil leakage risk of turbocharger

The invention discloses a turbocharger device and a control method for reducing the oil leakage risk of a turbocharger. The method comprises the following steps that the back pressure of an impeller of a compressor and pressure of an oil returning cavity of an intermediate body are obtained; and the back pressure of the impeller and the pressure of the oil returning cavity of the intermediate body are compared, and when the back pressure of the impeller is not larger than the pressure of the oil returning cavity, the rotating speed of the compressor is increased. According to the turbocharger device and the control method for reducing the oil leakage risk of the turbocharger, the pressure difference between the back pressure of the impeller and the pressure of the oil returning cavity of the intermediate body can be obtained in real time by obtaining the back pressure of the impeller and the pressure of the oil returning cavity of the intermediate body. According to the pressure difference, whether the turbocharger is in a risk area where oil leakage will happen or not is judged in real time, and before oil leakage happens, the measure that the rotating speed of the compressor is increased to increase the back pressure of the impeller is taken so as to improve the pressure difference, and oil leakage is prevented. Compared with the prior art, the oil leakage risk can be obviously reduced, and driving safety is improved.