Delphi Multec 3.5, Руководство по применению

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Multec 3.5 Fuel Injector Application Manual Recommendations and Precautions
Delphi Energy and Chassis Systems Revision: 11/05-1 7-1
7.0 Recommendations and Precautions
Note: Consider design and durability limits when specifying an
application to avoid unacceptable injector performance. The following
environments must be considered in the application and validation for
each new injector vehicle program.
7.1
Temperature
Temperature is a factor that must be carefully evaluated during vehicle
calibration. Temperatures that are either too cold or too hot for prolonged
periods of time must be avoided. System designs and software routines
that maintain temperatures within the Multec 3.5 Fuel Injector’s designed
range will prolong injector life and ensure optimum performance. (See
Table 3-2)
1. The solenoid is validated for use to temperatures of 125
o
C (257
o
F.)
Excursions to 150
o
C (302
o
F) for less than 1 hr are possible without
failure.
2. Injector coil resistance increases as injector temperature rises, so
injector opening/closing response times are therefore affected. To
minimize flow shifts due to increased injector resistance, injector
operating temperature should be minimized.
3. Operating temperatures as low as -40
o
C are possible with the proper
seal ring material.
4. Non-operational storage temperatures to -60
o
C will not result in
permanent injector damage.
Recommendation:
Note: See section 7.3.3-
Injector plugging To minimize the potential for formation of injector tip deposits keep
normal usage maximum tip temperatures during hot soak below 95
o
C.
Refer to Section 8.4.1-
Hot Fuel Handling Do not exceed the maximum operating tip temperatures shown in Table
8-1for acceptable hot re-start performance.
Temperature Measurement Method:
1. Determine the injector temperature across the full range of vehicle
operating conditions — install an injector equipped with
thermocouples to monitor temperatures. Instructions for preparing a
thermocoupled injector appear in Figure 7-1.