Patent ID: 6739135
Filing Date: 2004-05-25
Classification: F02B,F02D,Y02T

Abstract:
An air charge boosting system for an internal combustion engine, the system comprising an electrically driven pressure charging device, an electrical supply system for providing electrical power to drive the pressure charging device including a battery and an engine-driven battery recharger, and an electronic control system for controlling the operation of the pressure charging device and the electrical supply system, wherein the electronic control system is arranged to:a) determine one or more allowable operating limits to the operation of the pressure charging device based on the state of the electrical supply system; and b) drive the pressure charging device using the engine-driven battery recharger when the state of the electrical supply system is within an acceptable range; and c) isolate at least partially the battery from the engine-driven battery recharger and drive the pressure charging device using the battery when the state of the electrical supply system is not within an acceptable range.