Turbochargers for internal combustion engines

摘要: A turbocharger has a drive-shaft mounted in bearing means housing. The drive shaft drivably connects an exhaust gas driven turbine wheel to the impeller of air compressor (22). flow control device, such as wastegate (10, 39) and/or variable geometry inlet nozzle, positioned upstream is operable adjust operating performance turbocharger. An electrically drivable actuator motor (17, 45), D.C. or stepper motor, provided for regulating operation device via linkage (14, 15, 405, 407, 406, 825, 830, 835) response electrical signal dependent at least upon delivery pressure compressor. In preferred arrangement includes relatively rotatable threaded lead screw (15) and correspondingly female member (14) threadably engaged therewith.