Startup and shutdown procedures for an internal combustion engine with an electronically-controlled turbocharger (ECT)

摘要

Procedures for startup and shutdown of an internal combustion engine 10, eg a two-stroke or compression-ignition engine, having an electronically controlled, eg assisted, turbocharger (ECT) 12 are disclosed to provide the desired lubrication to engine and ECT components and sufficient cooling of the engine and ECT. Current is applied to the electric motor 20 of the ECT only when oil pressure at the ECT has exceeded a threshold pressure before the engine is started. The engine may have an electric oil pump 32 that can supply oil to the oil circuit in the engine 10 and the bearings of the ECT 12 independently of an engine-driven mechanical oil pump 30. Alternatively, an electric oil pump is not provided, in which case the oil circuit may include an oil accumulator 34 to provide oil for cooling after engine rotation has stopped.