Multec 3.5 Fuel Injector Application Manual
Table of Contents
Delphi Energy and Chassis Systems
Revision:
11/05-1
i
Table of Contents
1.
0 INTRODUCTION ................................................................................1-1
1.1
S
COPE OF
D
OCUMENT
.....................................................................................................................1-1
1.2
C
LASSIFICATION
..............................................................................................................................1-1
1.3
D
OCUMENT
M
ANAGEMENT
...............................................................................................................1-1
1.3.1
Document Release and Updates .........................................................................................1-1
1.4
C
OMMERCIAL
C
ONSIDERATIONS
.......................................................................................................1-1
1.5
O
BJECTIVES OF THIS
M
ANUAL
..........................................................................................................1-1
1.6
H
OW THIS
M
ANUAL IS
A
RRANGED
.....................................................................................................1-2
1.7
C
ONVENTIONS
U
SED IN THIS
M
ANUAL
...............................................................................................1-4
1.8
H
YPERLINKS
....................................................................................................................................1-5
1.9
A
PPLICABLE
D
OCUMENTS
................................................................................................................1-5
1.9.1
Order of Precedence ............................................................................................................1-5
1.9.2
Government Documents ......................................................................................................1-5
1.9.3
Other Delphi Reference Documents ....................................................................................1-5
1.9.4
Industry Documents .............................................................................................................1-6
1.9.5
Useful Web Sites..................................................................................................................1-6
2. 0 FUNDAMENTALS..............................................................................2-1
2.1
G
ENERAL
........................................................................................................................................2-1
2.2
E
NGINE
C
OMBUSTION
F
UNDAMENTALS
.............................................................................................2-2
2.2.1
Air/Fuel Ratio Effects on Combustion ..................................................................................2-3
2.2.2
Fuel Atomization...................................................................................................................2-7
2.2.3
Fuel Spray Characteristics and Injection Timing..................................................................2-8
2.2.4
Benefits of Electronic Fuel Injection Over Other Types of Fuel Systems ............................2-9
2.2.5
Impact of Transient Conditions on Combustion ...................................................................2-9
2.2.6
Impact of Fuel Composition................................................................................................2-10
2.2.7
Engine-Vehicle Environment..............................................................................................2-14
2.2.8
Maximum Power Fueling Requirements ............................................................................2-19
2.2.9
Injector Flow Tolerances ....................................................................................................2-20
2.3
F
UEL
F
LOW
C
ONSIDERATIONS
........................................................................................................2-20
2.3.1
Minimum Fuel Pump Flow Output......................................................................................2-21
2.3.2
Nominal Fuel Pump Output................................................................................................2-21
2.3.3
Fuel Pump Check Valve Requirements .............................................................................2-22
2.3.4
Pressure Regulator Gain/Considerations (Vacuum Biased)..............................................2-22
2.4
I
MPACT OF
E
MISSIONS
R
EQUIREMENTS
..........................................................................................2-23
2.4.1
The Impact of Emission Requirements on Fuel Control Systems .....................................2-23
2.4.2
Fuel Injector Design Effects on Evaporative Emissions.....................................................2-25
2.4.3
Impact of Canister Purge on Engine Fueling .....................................................................2-26
2.4.4
Impact of EGR and PCV on engine fueling........................................................................2-27
2.4.5
Injector Flow Characterization............................................................................................2-27
3.
0 PRODUCT DESCRIPTION.................................................................3-1
3.1
S
COPE
............................................................................................................................................3-1
3.2
G
ENERAL
D
ESCRIPTION
...................................................................................................................3-1
3.2.1
Appearance ..........................................................................................................................3-3
3.2.2
Exterior Outline.....................................................................................................................3-3
