Injector Noise; Note On Additional Exposures; Verification - Delphi Multec 3.5 Applications Manual

Validation Requirements
9.3.7

Injector Noise

9.3.8

Note on Additional Exposures

Verification

9.4
9-6
for 1 minute at a duty cycle of 100 ms pulse width and 200 ms period. The
injector will be pressurized with calibration test fluid at normal operating
pressure during the test. This test will not result in any permanent physical
damage to the injector or coil assembly, or any degradation in electrical
performance. Reference SAE J1832 Section 4.1.23.3.
Injector acoustical noise shall be evaluated in an anechoic chamber. The
microphone shall be located a distance of 1 meter above the injector. The
injector shall be pressurized with test fluid at the normal operating
presssure.
After purging the injector of trapped air by actuating at 3.5 ms pulse width
and 5.0 ms period, adjust the actuation to 3.5 ms pw and 20 ms period and
perform the noise measurment. The sound pressure level due to injector
opening and closing events shall be reported in dBA. (Reference SAE
J1832 Section 5.11.2.)
Other environmental test schedules, as performed for Fuel Rail
Assemblies are not mentioned here. These include (but are not limited to)
sand and dust exposure, submersion, and road splash. Information on
these tests can be obtained from Delphi separately.
A validation matrix (see Table 9-2) has been compiled which contains the
Multec 3.5 Fuel Injector Requirements that should be addressed in the
Component Technical Specification. The matrix shows these
requirements with a corresponding method of evaluation and the
respective responsibility level for performing the validation process. The
matrix should be used as a guideline when setting up a complete
validation analysis for a fuel injector application.
Note that only selected tests are performed for new injector applications or
injector design / process changes. These tests consist of application
specific tests that have not been comprehended in previous Multec 3.5
testing and have been commercially agreed to by Delphi (i.e. vibration
levels, fuel usage, etc). For a design or process change, only tests that are
identified as applicable to the change (through the DFMEA) would be
repeated.
Multec 3.5 Fuel Injector Application Manual
Delphi Energy and Chassis Systems
Revision: 11/05-1