ACERT Technology for Off-Highway C27 Engines TM TM
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? work? What are the advantages of ACERT Technology? Is extra maintenance required?
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? 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?
Multiple technologies Varies by engine family Varies by engine application – Me Medi dium um du duty ty – sp spec ecs, s, changes, new design – He Heav avy y duty duty – sp spec ecs, s, cha chang nges es,, new design
How is the C27 Affected?
C27 ACERT is based off the 3412E platform Displacement remains the same •Bore remains 137mm •Stroke remains 152mm
C27 ACERT
Performance Ratings – HP* Machine Rating A B C D E *Preliminary, subject to change
C27 Horsepower 730 820 900 1000 1100
C27 / C32 Performance 2100 rpm provides •Widest operating range •Easiest match in changeover
Design Strategy Leverage 3412E core V-12 structure structure and reduce percent of new content Proven reliability Thousands in operation Dominates most high power industrial segments
A4 Engine Control Module Generations of Experience
1987 8-bit PEEC II
1991
1993
Advanced 8-bit PEEC III
Two 8-bit ADEM II
1998 32-bit ADEM III
2004 32-bit ADEM 4
Proven Reliability
A4 Testing Extreme temperatures Vibration Salt spray Electrostatic
A4 Specifics Processing speeds and memory increased New 120 Pin engine connector Retains 70 Pin OEM connector More fuel maps to optimize ACERT Technology Better Better performance performance Better Better efficiency
A4 Specifics No change in OEM / machine interface Worldwide service network Using Cat ET Common electronics from C6.6 C6.6 –– C32
Allows greater protection and prognostics Full machine integration (Canbus, J1939, etc.)
New A4 Features Throttle input strategy • Multi-throttle capability • Configures throttle input priority Engine control system options • Full range governor • Min max governor Speed droop control •Simulates mechanical fuel system performance •Adjustable from 0-10% droop
A4 CAN J1939 Data Link High speed 2-way communications Standard SAE link for all C-series engines Broadcasts engine performance, status and diagnostic information Supports messages for powertrain integration Interface with Cat Messenger and analog gauges
Turbocharger Single wastegate turbocharger Provides higher boost over wide range Improves engine response Outstanding low end performance Improved peak torque
Turbocharger Wastegate Function Boost
Improved Response
RPM
Elevated BMEP
Turbocharger Wastegate Function Wastegate Active – Reduced BMEP
Wastegate Boost Boost
RPM
Cylinder Head High cam position • • • • •
Power to drive injectors Short accurate valve / injector actuation Optimize timing and injection Provides over speed safety Enhances performance and economy
Cylinder Head Crossflow design • • • • • •
Improved breathing Reduce pumping loss Better combustion Improved performance Improved power density Improved efficiency
Cylinder Head Single piece design • Rigid head becomes part of the engine structure • Allows high cam position • Provides best power density with lighter block • Reduces leaks
Cylinder Block Cross bolted mains and new material • • • • •
Piston / Rod / Liner Leverage C15 / C18 iron into C27 Piston, liner, rod, cooling jet and piston pin Validated components Proven reliable components High volume components High parts commonality
C27 Connecting Rod Assembly Connecting rod cap uses four bolts
Piston Monosteel piston • • • • • • • •
Forged steel design High strength Light weight Better tolerance control Rings conform to liner better Better oil control Reduced blow-by Less liner wear
Hardened Plateau Honed Liner Two step honing process: •Deep grooves for oil retention •Tops smoothed off to reduce wear and better contact •Reduces blow by •Improves oil control and consumption
Smooth Surface
Deep Cuts
Intake Manifold Smooth direct airflow Reduced air resistance Reduce pumping loss Enhanced turbulence in cylinder • Eliminates after cooler leak issues with ATAAC • Improved performance and efficiency • • •
Rear Gear Train •Provides drive for twin overhead cams •Provides auxiliary drive capability •Lowers noise vs. front gear gear train designs •Only minimal increased length compared with 3412E
Front Gear Train Pendulum
Pendulum damper •Proven design (used since ’94) •Used on non-driven end of cam •Reduces gear noise •Dampens cam flex to maintain optimal injection timing
Leak Free Design Advanced lower weight block design Improved joints through out the engine • Oil pan seal • Timing cover • Block to flywheel housing
All fluid connections sealed with standard thread “O” ring design
Specifications
C27 ACERT
Specifications Model
C27
Rated RPM
2100
Displacement
27 L (1647 cu. In.)
Bore
137.2mm (5.402 in.)
Stroke
152.4mm (6.000 in.)
Specifications Model
C27
Length
2120 mm (83.5 in.)
Width
1483 mm (58.4 in.)
Height
1496 mm (58.9 in.)
Weight
2372 kg (5219 lbs.)
Maintenance Information 500 hr. oil change interval with CAT CAT DEO (or oil meeting CAT ECF-1 spec) below 6000 ft. altitude. 250 hr. change interval above 6000 ft. High load factors and high fuel sulfur content will affect oil change intervals. Equipped with Cat’s new high efficiency oil oil filter S.O.S. sampling
High Efficiency Oil Filters Revolutionary filter design • Increased contamination control • Double the efficiency without increasing the changing interval • Reduces wear on all oil lubricated surfaces
Comparisons
C27 vs. 3412E
C27 ACERT vs. 3412E Tier 2 Model
C27 ACERT
3412E
Rated Power
671 kw (900 hp)
671 kw (900 hp)
Max RPM
2100
2100
Displacement
27 L (1647 in cu)
27 L (1647 in cu)
Bore
137 mm (5.39 in)
137 mm (5.39 in)
Stroke
152 mm (5.98 in)
152 mm (5.98 in)
Size (LWH)
2083 x 1473 x 1499 mm
1996 x 1483 x 1496 mm
Weight Power Density
2367 kg (5207 lbs) 2140 kg (4708 lbs) 3.5 kg/kw (5.8lb/hp)
3.2 kg/kw (5.2lb/hp)
Advantages of C27 • Combines the best of 3412E core engine with the high technology inline 6 • Leverages the 3412E core structure which has proven reliability • Leverages the new technology used in the C15 / C18 engines • Meets current and future emissions • Maintains fuel efficiency • Improved power density
