Injector drift correcting method for e.g. diesel engine of vehicle, involves determining drift correction value of injector to be added to nominal set point value by utilizing indicated average torque estimation for cylinders

摘要

#CMT# #/CMT# The method involves determining a drift correction value (delta A) of an injector (18) to be added to a nominal set point value (AN) by utilizing an indicated average torque estimation for cylinders (4). The nominal set point value is selected for a period during which the need of the engine (2) torque is null. A nominal torque value (CgN) corresponding to the nominal set point is calculated for the period. The nominal torque value is compared with the indicated average torque value. #CMT#USE : #/CMT# Method for correcting drift of an injector of an engine such as direct or indirection fuel injection type internal combustion engine e.g. diesel engine or petrol engine, of a vehicle for controlling the injector (claimed). #CMT#ADVANTAGE : #/CMT# The method corrects dispersions and drifts on small quantity, of the injected fuel, lower than 5 milligram per stroke in a precise, simple and cost effective manner, while eliminating inconvenience of noise and fumes resulting from injected quantity of badly controlled fuel. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view illustrating an organization for controlling an engine of a vehicle.'(Drawing includes non-English language text)' AN : Nominal set point value delta A : Drift correction value CgN : Nominal torque value 2 : Engine 4 : Cylinders 18 : Injector.