ELECTRONIC CONTROL UNIT AND METHOD FOR FUEL DELIVERY

摘要

A method and apparatus are disclosed for controlling the operation of a fuel-injected, spark-ignited internal combustion engine by adjusting the pulse width of the fuel injection signal. An initial fuel injection pulse is set (ECU) for respective, preselected pairs of engine operating parameters such as engine speed (38) and manifold pressure (24). The injection pulse width is then adjusted by a computer control (ECU) for each preselected pair of parameters to obtain optimum performance for example, as might be indicated by detection of engine torque. Each time a pulse width is adjusted (ECU), all previously adjusted pulse widths are compared (ECU) with respect to corresponding pulse widths in stored-template fuel maps (ECU). The best-matched template fuel map is then used in conjunction with all previoulsy adjusted points to create a new operational fuel map (ECU) to run the engine until a more updated operational fuel map can be created upon additional fuel pulse widths being tuned.