Patent ID: 6058707
Filing Date: 2000-05-09
Classification: F02B,F02D,Y02T

Abstract:
A method of controlling the charge air mass flow through an intake duct of an internal combustion engine having an exhaust gas turbocharger with adjustable-turbine geometry including guide vanes during dynamic operation of the engine from one stationary operating state with a given engine power output to another stationary engine operating state with a greater engine power output, comprising the steps of:reducing the gas admission flow cross-section of the turbine by moving the turbine flow guide vanes to a closing position to provide a predetermined reduction in the turbine gas admission flow cross-section,determining a charge air pressure p.sub.2S-act in the intake duct of the internal combustion engine, andopening the flow guide vanes from their closed position to a predetermined opening position corresponding to said other stationary engine operating state at a rate which is proportional to the increase of the charge air pressure p.sub.2S-act from an initial charge air pressure (p.sub.2SO) in the intake duct before the load change to a charge air pressure p.sub.2S-des corresponding to the desired other stationary operating state of the internal combustion engine.