Patent ID: 6298830
Filing Date: 2001-10-09
Classification: F02D,Y02T

Abstract:
A high-pressure fuel injection apparatus comprising:a high-pressure pump for pressurizing fuel to supply high-pressure fuel;a fuel injection section having a common rail for accumulating the high-pressure fuel therein and an injector(s) for supplying and injecting the high-pressure fuel accumulated in the common rail to an internal combustion engine; anda control section for controlling an actual injection period of the injector(s);said control section comprising:a first determining means responsive to at least one signal indicative of the operation condition of the internal combustion engine for determining a target amount of fuel injection per one period of fuel injection;a second determining means for determining a reference injection period of the injector in correspondence to the target amount of fuel injection determined by the first determining means;a calculating means responsive to the reference injection period and the rotational speed of the high-pressure pump for calculating a correction value for correcting the reference injection period so as to correct an error caused by the decrease in fuel pressure during the period of fuel injection; anda correcting means for correcting the reference injection period by the correction value, whereby the actual injection period is controlled in response to the output from the correcting means.