Delphi Multec 3.5, Руководство по применению

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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
1 2
p
p
m m
∆
∆
=
Required Flow Range = Max flow / Min. flow
Required Injector Flow Range = _________