Delphi Multec 3.5 Applications Manual page 9

Multec 3.5 Fuel Injector Application Manual
Tables
Table 2-1 - Stoichiometry of Alternate Fuel Blends ................................................................................. 2-4
Table 3-1 Solenoid Electrical Properties................................................................................................ 3-39
Table 3-2 - Injector Environmental Operating Conditions...................................................................... 3-39
Table 6-1 - Multec 3.5 Injector Handling ................................................................................................. 6-2
Table 6-2 - Recommended seal ring lubricants ....................................................................................... 6-8
Table 8-1 - Injector tip soak temperature vs required fuel pressure........................................................ 8-3
Table 9-1 - Potential Injector Test Fuels .................................................................................................. 9-4
Table 9-2 - Injector Verification Matrix Template ..................................................................................... 9-7
Figures
Figure 2-1- Engine Fuel System (shown is a demand fuel rail for a V6 application)............................... 2-2
Figure 2-2 - Air Fuel Ratio Effect on Catalytic Converter Efficiency ........................................................ 2-6
Figure 2-3 - Fuel Distillation Curve vs Temperature .............................................................................. 2-13
Figure 2-4 - 50% Vapor / Liquid Ratio vs RVP, Fuel and Pressure.......................................................2-17
Figure 2-5 - Fuel Pressure Regulator and Gain Calculation.................................................................. 2-23
Figure 2-6 - Engine Management System Open Loop vs Closed Loop System Architecture............... 2-24
Figure 2-7 - Catalytic Converter Efficiency vs Air/Fuel Ratio................................................................. 2-24
Figure 2-8 California Tailpipe Emissions Limits..................................................................................... 2-25
Figure 2-9 - Evaporative Emissions Regulations.................................................................................. 2-26
Figure 3-1 - Top Feed Port Fuel Injection................................................................................................ 3-2
Figure 3-2 - Multec 3.5 Fuel Injector Dimensions - Seal ring design. (For exact dimensions, refer to
Delphi Injector Outline Drawing). ...................................................................................................... 3-4
Figure 3-3 - Multec 3.5 Fuel Injector Dimensions - Cushion seal / Face seal design (For exact
dimensions, refer to Delphi Injector Outline Drawing. ...................................................................... 3-4
Figure 3-4 - Injector Identification and Markings...................................................................................... 3-5
Figure 3-5 Multec 3.5 Internal Components ............................................................................................ 3-6
Figure 3-6 -Injector Retaining Clip Designs ............................................................................................. 3-7
Figure 3-7 - Multec 3.5 Magnetic Circuit................................................................................................ 3-10
Figure 3-8 - Multec 3.5 Fuel Flow Path.................................................................................................. 3-10
Figure 3-9 - Dual Spray Injector............................................................................................................. 3-11
Figure 3-10 - Injector Targeting ............................................................................................................. 3-21
Figure 3-11 - Dual Spray Injector Separation and Orientation Angle .................................................... 3-25
Figure 3-12 - Sample Single and Dual Spray Injector Patternator Results ........................................... 3-26
Figure 3-13 Injector Opening and Closing Response............................................................................ 3-27
Figure 3-14 - High Pulse-Width Flow Effects. Static Occurs at 10 msec (rep. rate = 10 msec)........... 3-29
Figure 3-15 - Low Pulse-Width Flow Effects. (Rep. rate = 10msec) ................................................... 3-29
Figure 3-16 - Injector Flow Curve Tailbiting........................................................................................... 3-31
Figure 3-17 - Linear Range.................................................................................................................... 3-32
Figure 3-18 - Injector Working Flow Range ........................................................................................... 3-34
Figure 3-19 Fuel Rail Total Tip Leak Monte Carlo Simulation Example (4 cylinder)............................ 3-36
Figure 4-1 - Block Diagram ...................................................................................................................... 4-1
Figure 4-2 - Example of Recommended Mounting Feature Dimensions ................................................ 4-4
Figure 4-3 - Example of data presentation for steady state rpm. ............................................................ 4-7
Figure 4-4 - Typical Spectral Map............................................................................................................ 4-7
Figure 4-5 Injector Connector Polarity '+'.............................................................................................. 4-10
Figure 4-6 - Injector Electrical Connectors ............................................................................................ 4-11
Figure 4-7 - Metri-Pack Harness Connector .......................................................................................... 4-12
Figure 4-8 - USCAR Harness Connector............................................................................................... 4-13
Figure 4-9 - Electrical schematic of saturated switch injector driver circuit ........................................... 4-15
Figure 4-10 - Oscilloscope trace of injector avalanche energy measurement ...................................... 4-16
Figure 5-1 - Injector Firing Schemes (red bar = injection event) ............................................................. 5-4
Figure 5-2 - Slope and intercept graph (Flow vs. Pulse Width) ............................................................... 5-5
Figure 5-3 - Sequential injection timing considerations (4500 rpm) ...................................................... 5-16
Figure 6-1 Injector Seal Ring Installation Precaution ............................................................................. 6-3
Delphi Energy and Chassis Systems
Table of Contents
Revision: 11/05-1 v