Direct Injection Gasoline Fuel Injector Characterization
This SAE Recommended Practice promotes uniformity in the evaluation and qualification tests conducted on DIG fuel injectors used in gasoline engine applications. The document scope is limited to electronically-actuated fuel injection devices used in automotive gasoline direct fuel injection systems. This document is primarily restricted to bench tests.
Rationale: Gasoline Direct Injection differs substantially from port fuel injection, hence the existing port fuel injection recommended practice documents cannot be employed. This area of application of gasoline direct injection is rapidly expanding worldwide. Prior to this document, no recommended practice was available for gasoline direct injectors. This recommended practice will permit the automotive industry to evaluate, characterize and compare direct gasoline injector hardware.
A direct injection gasoline (DIG) fuel injector is an electrically actuated device that delivers a specific amount of fuel into the combustion chamber of an engine. The amount of fuel is controlled by the length of time the metering injector is open, and the differential pressure across that injector. The amount of time the injector is open is typically determined by an engine control module.