Direct Injection Gasoline Fuel Injector Characterization
This SAE Recommended Practice promotes uniformity in the evaluation and qualification tests conducted on GDI fuel injectors used in gasoline engine applications, where fuel pressures are typically well above 1 MPa. The document scope is limited to electrically-actuated fuel injection devices used in automotive GDI systems and is primarily restricted to bench tests.
The use of uniform and standardized testing and evaluation procedures for fuel injectors is important to the worldwide automotive community. Standardized test procedures provide both injector manufacturers and end-users with one accepted test for each of the key injector performance parameters, instead of a specialized test protocol for each of many customers and applications. The use of these procedures for test configurations, testing methods, data reduction and reporting that are contained in this document will significantly enhance the ability of one test laboratory to accurately repeat and verify the results of another.
Gasoline direct injection (GDI) differs substantially from port fuel injection (PFI), hence the existing PFI recommended practice document (SAE J1832) cannot be employed. The application of GDI has rapidly expanded worldwide. Prior to this document, a recommended practice for GDI injectors was not available. This recommended practice will permit the automotive industry to evaluate, characterize and compare GDI hardware.