Delphi Multec 3.5 - Page 6

Table of Contents Multec 3.5 Fuel Injector Application Manual
ii Delphi Energy and Chassis Systems
Revision: 11/05-01
3.2.3
Usage Definition ...................................................................................................................3-3
3.2.4 Failure Diagnostics...............................................................................................................3-3
3.3 PHYSICAL SPECIFICATIONS ..............................................................................................................3-3
3.3.1 Dimensions...........................................................................................................................3-3
3.3.2 Mass .....................................................................................................................................3-5
3.3.3 Identification and Markings ..................................................................................................3-5
3.3.4 Internal Components ............................................................................................................3-5
3.3.5 Injector Retaining Clip ..........................................................................................................3-6
3.3.6 Seal rings..............................................................................................................................3-7
3.4 CUSHION SEAL INJECTOR DESIGN ....................................................................................................3-8
3.5 INJECTOR DESIGN ...........................................................................................................................3-8
3.5.1 Dual Spray Fuel Injector.....................................................................................................3-11
3.6 INJECTOR CONTROLS – CONTROLLER DRIVE CIRCUIT .....................................................................3-12
3.6.1 Minimum Operating Voltage (MOV) ...................................................................................3-12
3.6.2 Driver Considerations.........................................................................................................3-12
3.6.3 Driver Circuit Clamping Voltage .........................................................................................3-13
3.6.4 Injector Polarity...................................................................................................................3-13
3.7 INJECTOR FLOW RATE SIZING ........................................................................................................ 3-13
3.8 INJECTOR TARGETING, PLACEMENT AND CONE ANGLE.................................................................... 3-21
3.8.1 Targeting ............................................................................................................................3-21
3.8.2 Cone Angle.........................................................................................................................3-22
3.8.3 Spray Atomization ..............................................................................................................3-23
3.9 PULSE-WIDTH LIMITS ....................................................................................................................3-27
3.9.1 Minimum Pulse-Width (MPW) ............................................................................................ 3-28
3.9.2 Tailbiting .............................................................................................................................3-30
3.10 LINEAR AND WORKING FLOW RANGE .....................................................................................3-31
3.10.1 Linear Range......................................................................................................................3-31
3.10.2 Working Flow Range .......................................................................................................... 3-33
3.11 TIP LEAKAGE ........................................................................................................................3-34
3.11.1 Total Fuel System Tip Leakage Monte Carlo Analysis ......................................................3-35
3.12 CONTAMINATION RESISTANCE ...............................................................................................3-36
3.13 DYNAMIC AND STATIC FUEL FLOW SPECIFICATIONS................................................................ 3-36
3.13.1 Flow Test Fluid Specification .............................................................................................3-37
3.14 NOISE ..................................................................................................................................3-38
3.15 ELECTRICAL SPECIFICATIONS ................................................................................................3-38
3.15.1 Solenoid Coil Specifications...............................................................................................3-38
3.15.2 Avalanche Energy ..............................................................................................................3-38
3.16 ENVIRONMENTAL CONDITIONS...............................................................................................3-39
3.16.1 Hot Fuel Handling...............................................................................................................3-39
3.16.2 Environmental Exposure ....................................................................................................3-40
4. 0 SYSTEM INTERFACE........................................................................4-1
4.1 GENERAL ........................................................................................................................................4-1
4.1.1 Interface Control Document .................................................................................................4-2
4.2 MECHANICAL INTERFACES ...............................................................................................................4-3
4.2.1 Locating the Fuel Injector .....................................................................................................4-3
4.2.2 Orienting the Injector ............................................................................................................4-4
4.2.3 Vibration Levels....................................................................................................................4-5
4.2.4 Fuel Supply System Interface ..............................................................................................4-7