초록 ▼

A method for improving the transient response of a multi-port fuel injection system wherein the delivery of a pulse to an injector is fragmented into a variable number of pulse fragments and the delivery of the pulse fragments to the injector is spaced throughout a respective fueling window. The mag

A method for improving the transient response of a multi-port fuel injection system wherein the delivery of a pulse to an injector is fragmented into a variable number of pulse fragments and the delivery of the pulse fragments to the injector is spaced throughout a respective fueling window. The magnitude and delivery angle of each of the pulse fragments is variable and depends upon the current engine operating conditions. Calculations of the magnitude of each pulse fragment are based upon a constantly recalculated total pulse width.

대표청구항 ▼

[ What is claimed is:] [1.] In a fuel injection system for an internal combustion engine having at least one cylinder, a throttling device connected to said engine to allow or prevent air to each of said cylinders; a fuel source; at least one fuel line connected to said fuel source; at least one fue

[ What is claimed is:] [1.] In a fuel injection system for an internal combustion engine having at least one cylinder, a throttling device connected to said engine to allow or prevent air to each of said cylinders; a fuel source; at least one fuel line connected to said fuel source; at least one fuel injector for each of said cylinders, each fuel injector connected to said fuel line for delivering fuel to a corresponding cylinder; sensors for detecting an operating condition of said engine; and an electronic control unit (ECU) electrically connected to said sensors and each of said fuel injectors for receiving signals from said sensors and outputting a variable number of pulse fragments to fire said each of said fuel injectors, said number of pulse fragments ranging from zero to a predetermined maximum, a method for determining the number of pulse fragments to be delivered and a width of each of said pulse fragments comprising the steps of:continuously calculating a total pulse width based upon said engine operating condition;acquiring a first current value of said total pulse width;calculating a width of a first pulse fragment to be delivered based upon said first current value;delivering said first pulse fragment if said first pulse fragment width exceeds a first predetermined width value;acquiring a next current value of said total pulse width;calculating a width of a next pulse fragment to be delivered based upon said next current value;delivering said next pulse fragment if said next pulse fragment width exceeds a predetermined width value;repeating the above three steps for each of a remaining pulse fragment in a fueling window;repeating all of the above steps for each subsequent fueling window.