Temperature; Life Cycling - Delphi Multec 3.5 Applications Manual

Multec 3.5 Fuel Injector Application Manual
9.3.2

Temperature

9.3.2.1 Temperature Shock
9.3.3

Life Cycling

Delphi Energy and Chassis Systems
of accelerated corrosion schedule). Injectors will not experience any loss
of function, or reduction in service life as a result of this exposure.
Typical injector temperature environments are defined below. Multec 3.5
injectors will not experience any loss of the ability to comply with the
durability flow tolerance requirements as defined on the Test Specification
Sheet after exposure to the following temperature environments. Also,
Multec 3.5 injectors will not experience unacceptable external leakage, any
type of physical degradation, or loss of service life during or after being
exposed to these ambient temperatures.
• Normal Operating Temperature Range:
• Extreme Operating Temperature Range (some
performance degradation):
• Storage Temperature Range:
The Multec 3.5 injector has been designed for operation within these
temperature limits. Injector design modifications may be required for
operation outside of these temperature limits.
Reference SAE J1832 Section 5.3.
Temperature shock shall consist of cycling the injectors between –40 and
100 C with a 0.5-hour dwell at each of the temperature endpoints for a
total of 120 hours exposure. The transition between temperatures should
be instantaneous. The injectors will not experience any loss of the ability
to comply with the durability flow tolerance requirements stated on the
Injector Outline Drawing. The injectors will not experience any loss of
function or reduction in service life as a result of this exposure.
Injector life cycling will consist of actuating a population of injectors in the
specified test fuel, at the specified fuel temperature for 1.0 B cycles, which
approximates 2 to 3 times (or more) expected service life for most
applications. Testing will be performed at the system fuel pressure or
greater, at a duty cycle of 2.0 ms pulse width / 4.0 ms period. Periodic flow
audits will be performed to track the flow performance of the hardware
relative to the initial flow values. At the end of test, injector performance
should comply with the flow tolerance requirements as stated on the Injector
Outline Drawing (Reference section 5.9 of SAE J1832).
Validation Requirements
-30 to 125°C (-22 to 257°F)
-40 to 150°C (-40 to 300°F)
-60°C to 60°C (-76 to 140°F )
Revision: 11/05-1 9-3