| 摘要 |
In turbocharger, particularly an exhaust gas turbocharger for an internal combustion engine with a turbine wheel and an impeller disposed on a common shaft which is rotatably supported by friction bearings to which lubricating oil is supplied by an oil supply, a turbine speed detection device is provided comprising a pressure modulating structure disposed on the shaft for modulating the oil pressure in the oil supply in accordance with the speed of the shaft and an oil pressure sensor is arranged in the oil supply for sensing the oil pressure modulations for determining the speed of the turbocharger
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