Electronic control of a turbocharged internal combustion engine

摘要

The turbocharger is powered by the exhaust flow with a control valve regulating the level of exhaust flow over the system. The control signals are derived from the throttle setting etc. and are compared with plausible signals generated by a control system, in response to the engine parameters. If the actual control signals differ from the plausible signals by more than a preset amount an error state is recognised and a failsafe control mode is activated. The plausible signals are derived from the throttle setting and the engine speed, and are modulated by a correction factor.