Fuel injection controller

摘要

A fuel injection controller includes an output detecting portion detecting a first output generated by a combustion of a fuel which a sensor-injector injects and a second output generated by a combustion of a fuel which the second fuel injector injects, a first injection quantity computing portion computing, based on a detection value of the fuel pressure sensor, a first injection quantity injected by the sensor-injector injector to generate the first output, and a second injection quantity estimating portion estimating a second injection quantity injected by the second fuel injector to generate the second output, based on the first output, the second output and the first injection quantity.

主权项

1. A fuel injection controller applied to a fuel injection system including a first fuel injector provided in a first cylinder of an engine; a second fuel injector provided in a second cylinder of the engine; and a fuel pressure sensor, provided to only the first fuel injector and not the second fuel injector, for detecting a variation in fuel pressure only in the first fuel injector when the first fuel injector injects a fuel,
the fuel injection controller comprising a computer processor, the fuel injection controller being configured to at least perform: an output detection which detects a first output generated by a combustion of a fuel which the first fuel injector injects and a second output generated by a combustion of a fuel which the second fuel injector injects; a first injection quantity computation which computes a first injection quantity injected by the first fuel injector to generate the first output, based on a detection value of the fuel pressure sensor; a first correlative value computation which computes a first correlative value indicative of a correlation between the first output and the first injection quantity; a second injection quantity estimation which estimates a second injection quantity injected by the second fuel injector, wherein the second injection quantity is based on the second output and the first correlative value indicative of the correlation between the first output and the first injection quantity; and a control of an operation of the fuel injection system based on the estimated second injection quantity, wherein the first output is an increase in engine speed or an increase combustion pressure; and the second output is an increase in engine speed or an increase in combustion pressure.