Mechanical Integrity; Table 9-1 - Potential Injector Test Fuels - Delphi Multec 3.5 Applications Manual

Validation Requirements
Fuel
Phase II
Peroxide Fuel Mix
Corrosive NAE10
Brazilian E20
Delphi Plugging Fuels
9.3.4

Mechanical Integrity

9.3.4.1 Structural Tests
9.3.4.2 Axial Force
9-4
The requirements in this section relate to testing performed in the course of
injector validation for structural integrity, fuels compliance, and injector
flow performance over anticipated service life. All testing, unless otherwise
noted, should be performed using Delphi test procedures.
Multec 3.5 will be validated for durability flow performance on a number of
fuels that are arrived at through Customer request or market analysis. While
it is difficult to validate for every fuel available in the marketplace, the list
of validation fuels, shown in Table 9-1, is intended to be comprehensive,
and cover all but the most severe fuels, for which additional design
measures may be required.
In some cases engineering and materials analyses will be used in place of
physical testing to verify compatibility with certain fuels in Table 9-1.
Description
TF1 E10 Non Corrosive
TF3 15% MTBE
CARB Spec
Fuel "C" + Peroxides
E10 + Corrosive Pkg
Fuel "C", E20 - 24 +
Corrosive pkg.
Delphi Formulation

Table 9-1 - Potential Injector Test Fuels

Mechanical integrity testing consists of monitoring injector performance and
physical condition after exposure to forces that may be encountered in actual
field use. Exposures to these forces will not cause injector flow shift
exceeding the limits defined on the Injector Outline Drawing, or result in
unacceptable physical alteration or damage.
(Reference section 5.8 of SAE J1832)
Multec 3.5 injectors will meet flow shift requirements per the Injector
Outline Drawing after the following structural tests:
Apply 800 N compressive and tensile to the injector between the injector tip
and the end of the fuel inlet. For the tensile test the load may be applied at
the shoulder of manifold seal ring gland and to the upper seal ring retainer.
Multec 3.5 Fuel Injector Application Manual
Comments
with MTBE
E22 Commonly used
For plugging test
Delphi Energy and Chassis Systems
Revision: 11/05-1