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Edition 47 12-21
12
On-Highway Trucks
Engine Selection
Accessories:
The HP required to power the Cooling Fan,
Alternator, Power Steering, A/C and Air
Compressor at the desired cruise speed.
Pacc =
57 HP @ 1600 RPM = 73 HP at 1800 RPM
Considering 2100 is Max Engine RPM. Select a Pacc
that best matches your application.
PTO:
The HP required to power Mixers, Pumps, Gen-
erators, etc. that are running while the truck is
cruising.
Ppto =
Supplied by Body Builder
Zero if not running while cruising
Total HP Required at the Drive Wheel
Preq =
Pr + Pa + Pg + Pacc + Ppto
Engine Selection:
Account for Driveline losses and select
an Engine with at least as much HP
as P(eng) from table below. Continue
to Step 2, to verify the Engine you
selected has the required Torque.
Peng =
Preq
0.93
0.93 =
Driveline Efficiency
Engine Specifications
Engine
Horsepower
(BHP @ 1700 RPM)
Torque Peak
(lbf-ft @ 1000 RPM)
Gov. Speed
(RPM)
Fully Developed Torque
(lbf-ft at 800 RPM)
CT13
365
1250
2100
686
CT13
370
1350
2100
770
CT13
390
1450
2100
811
CT13
410
1450
2100
828
CT13
430
1550
2100
868
CT13
475
1700
2100
959