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

Abstract

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.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a turbocharger device and a control method for reducing the risk of oil leakage of the turbocharger. Background technique [0002] With the continuous improvement of emission regulations and people's requirements for power performance, the turbocharger (Turbocharger) for vehicles has been widely used. [0003] Please refer to figure 1 , 2 , figure 1 is a schematic diagram of a typical turbo diesel engine system; figure 2 for figure 1 Schematic diagram of a turbocharger. [0004] The turbocharger mainly includes a compressor, an intermediate body 40 and a turbine. The two ends of the intermediate body 40 are respectively connected to the compressor and the turbine, and specifically the intermediate shaft 30 inside is connected to the compressor and the turbine. Such as figure 1 As shown, the exhaust gas from the exhaust pipe of the diesel engine can enter the turbine, and ...

AI Technical Summary

Problems solved by technology

[0008] However, when the engine is idling or the air intake is insufficient, the back pressure of the compressor impeller 20 will decrease, which may be lower than the pressure of the oil return chamber 402 of the intermediate body 40, resulting in the failure of the above-mentioned piston ring air seal and oil leakage Phenomenon

[0009] At present, there is no clear method to prevent or judge the oil leakage problem. The oil leakage will only be discovered when the vehicle is parked or abnormal inspection occurs, which will increase the risk of driving and damage the engine.

Images