Delphi Multec 3.5 User Manual

Product Description Multec 3.5 Fuel Injector Application Manual
3-20 Delphi Energy and Chassis Systems
Revision: 11/05-1
Injector Flow Worksheet
Program Name:
The following values must be determined before calculating maximum fuel flow per injector.
• Engine horsepower rating (HP) _________
− @ Engine RPM _________
• Brake Specific Fuel Consumption (BSFC)
(Comprehend alternate fuel requirements) _________
− @ Engine RPM _________
• Number of Cylinders _________
• Minimum Fuel Rate _________
• Calibration Specific Issues
− List: _________________ _________
− List: _________________ _________
Use the following formula to determine maximum fuel flow per injector.
1. Multiply max. engine horsepower by the brake specific fuel consumption to obtain required fuel flow per hour.
(________ HP) * (________ BSFC) = ________ Lb
m
/Hour
2. Convert to grams/second.
(_______ Lb
m
/Hr)*(454 grams/ Lb
m
)*1 hr/3600 sec)=________ gm/sec
3. Adjust the value to eliminate injector operation in the tailbiting region (if required). (Assume a 5% adjustment.)
(________ gm/sec) * 1.05 = ________ gm/sec
4. Adjust value for durability flow shift limit (see injector outline drawing for values)
(________ gm/sec) * 1.xx = ________ gm/sec
5. Divide the value by the number of cylinders to obtain maximum flow per injector.
(________ gm/sec) / (_____ cylinders) = ________ gm/sec per injector
6. Adjust value for calibration specific issues.
(________ gm/sec) * 1.xx = ________ gm/sec
Final injector size (maximum injector flow) = _____________ gm/sec
7. Calculate required injector linear flow range.
Engine rep rate =[1/(Engine RPM)] * [(60 sec/min)* (2 rev/inject)* (1000 mSec/sec)
@ Engine Idle RPM = ________
Engine rep rate = [1/_____ RPM]*120,000 mSec/inject
Required fuel flows at test repetition rates:
Minimum fuel flow = _____ gm/sec*[_____ mSec/10 mSec]
Maximum fuel flow = _________ gm/sec
Adjust min and max flow rates for constant injector pressure drop:
1
2
12
p
p
mm
∆
∆
=
Required Flow Range = Max flow / Min. flow
Required Injector Flow Range = _________

Delphi Multec 3.5 Specifications

General

Brand	Delphi
Model	Multec 3.5
Category	Laboratory Equipment
Language	English