Delphi Multec 3.5 User Manual

Multec 3.5 Fuel Injector Application Manual Fundamentals
Delphi Energy and Chassis Systems
Revision: 11/05-1 2-13
Figure 2-3 - Fuel Distillation Curve vs Temperature
2.2.6.4 Driveability Index
A more complete understanding of the impact of fuel volatility on fuel
system performance can be obtained by measuring the fuel’s distillation
curve and computing the driveability index (DI). Figure 2-3 shows a fuel
distillation curve and which aspects of engine performance are impacted
for a typical gasoline.
DI = 1.5T
10
+ 3T
50
+T
90
where T
10
, T
50
, T
90
are the 10%, 50% and 90 %
evaporated temperatures measured by ASTM D86. Temperatures are
specified in °F.
AAMA and ASTM proposed limits for DI are 1200 to 1290 max. DI
values exceeding these limits have been documented to produce customer
dissatisfaction due to reduced driveability.

Delphi Multec 3.5 Specifications

General

Brand	Delphi
Model	Multec 3.5
Category	Laboratory Equipment
Language	English