초록 ▼

A modified fuel injector is fitted with a position sensing device that starts sending position information to the ECU at the onset of pressurization and displacement of fuel in the injector. Thus the effective stroke of the piston in the injector valve can be made to represent the fuel that is deliv

A modified fuel injector is fitted with a position sensing device that starts sending position information to the ECU at the onset of pressurization and displacement of fuel in the injector. Thus the effective stroke of the piston in the injector valve can be made to represent the fuel that is delivered to each cylinder of an engine. A position sensor is attached to the injector valve piston assembly. By electronically measuring the amount of effective piston travel, i.e. the piston travel that commences at the onset of pressurization of the injector valve, the amount of fuel delivered to the cylinder is known.

대표청구항 ▼

[ What is claimed is:] [1.] A system for electronically measuring an amount of effective piston stroke travel in a fuel injector while compressing and displacing fuel in a chamber therein to determine a precise amount of fuel delivered to an engine cylinder by said piston stroke travel, the system c

[ What is claimed is:] [1.] A system for electronically measuring an amount of effective piston stroke travel in a fuel injector while compressing and displacing fuel in a chamber therein to determine a precise amount of fuel delivered to an engine cylinder by said piston stroke travel, the system comprising:a first sensor means on said injector for detecting an actual amount of piston stroke travel and generating corresponding first signal;a second sensor means on said injector for detecting both the onset and the completion of fuel compression by said piston stroke travel and generating corresponding second and third signals; andan electronic control unit coupled to said first and second sensors and having a measuring circuit for calculating effective piston stroke travel only from the onset of said fuel compression as determined by said second signal and therefore determining a precise measurement of fuel ejected on each piston stroke.