ACERT
TM
Technology
for Off-Highway C15, C18,
C27 and C32 Engines
ACERT Technology

What does ACERT stand for?

What is ACERT Technology?

What engines are affected?

How is ACERT Technology Different?

What does ACERT Technology look like?

How does ACERT Technology work?

What are the advantages of ACERT Technology?

Is extra maintenance required?
ACERT Technology
What does ACERT stand for?
Advanced
Combustion
Emissions
Reduction
Technology
What is ACERT Technology?


Performance
2100 rpm provides
Widest operating
range
Easiest match in
changeover
1800 rpm provides
Best fuel economy
Best heat rejection
Less noise
1300 1500 1700 1900 2100
RPM
POWER
A
B
C
D
E
Full Power from 1800 to 2100 rpm
C15 / C18 Heat Rejection
•
Changing from 2100 rpm’s to 1800 DECREASES heat rejection in
the C15 and maintains same heat rejection in the C18

* kW of heat rejection per kW
of engine power—jacket water
EPA Engine Hp RPM JW* % Change Air % Change
Tier 3 C18 630 1800 0.36 0.0% 0.22 10.0%
Tier 3 C18 630 2100 0.38 5.6% 0.24 20.0%
Tier 2 C-16 630 2100 0.36 0.2

Externally similar to C-15
One installation for wide
power range
Best in class power
density
Design Strategy
•
Increased compression ratio
•
C15 - 18:1 compression ratio
•
C18 – 16.3:1 or 18:1 based on HP rating
•
Component changes to increase peak
cylinder pressure capability
•
Improves cold start characteristics
•
Improves white smoke clean up time
•
Optimizes ACERT performance
ACERT Multiple Injection
Capability
MEUI and ADEM
TM
4
•
Variable injection timing
•
Controls quantity of fuel

Multiple injection
Rate shaping
ADEM 4 Electronic Engine
Control
1987
8-bit
PEEC II
1991
Advanced
8-bit
PEEC III
1993
Two 8-bit
ADEM II
1998 32-bit
ADEM III
2004 32-bit
ADEM 4
Generations of Experience
Proven Reliability
ADEM 4
Processing speeds and
memory increased
New 120 Pin engine
connector
Retains 70 Pin OEM
connector
More fuel maps to optimize
ACERT Technology
Better performance

Supports messages for powertrain
integration
Interface with Cat Messenger and
analog gauges
C15, C18 Head bolt torque
sequence
C15, C18 Head Bolt Torque
Procedure
•
Tighten bolts 1-26 in sequence to 270 +/- 15 Nm
•
Tighten bolts 1-26 in sequence to 450 +/- 15 Nm
•
Retighten bolts 1-26 in sequence to 450 +/- 15 Nm
C15, C18, C27, C32
Turbocharger
•
Wastegated turbocharger
•
Provides higher boost over
wide range
•
Single turbo
•
Improves engine
response
•
Outstanding low end
performance
•