ACERT C27

Caterpillar Confidential: GREEN

ACERTTM Technologyfor Off-Highway C27

Engines

ACERTTM Technologyfor Off-Highway C27

Engines


ACERT TechnologyACERT TechnologyWhat 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?

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 TechnologyACERT Technology

What does ACERT stand for?What does ACERT stand for?AdvancedCombustionEmissionsReductionTechnology


What is ACERT Technology?What is ACERT Technology?

Multiple technologiesVaries by engine familyVaries by engine application

– Medium duty – specs, changes, new design

– Heavy duty – specs, changes, new design

Multiple technologiesVaries by engine familyVaries by engine application

– Medium duty – specs, changes, new design

– Heavy duty – specs, changes, new design


How is the C27 Affected?How is the C27 Affected?

C27 ACERT is based off the 3412E platformDisplacement remains the same•Bore remains 137mm•Stroke remains 152mm

C27 ACERT is based off the 3412E platformDisplacement remains the same•Bore remains 137mm•Stroke remains 152mm


C27 ACERTC27 ACERT


Performance Ratings – HP*Performance Ratings – HP*

Machine Rating C27Horsepower

A 730

B 820

C 900

D 1000

E 1100

*Preliminary, subject to change


C27 / C32 PerformanceC27 / C32 Performance

2100 rpm provides•Widest operating range•Easiest match in changeover

1800 rpm provides•Best fuel economy•Best heat rejection •Less noise

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

POW

ER

ABCDE

1300 1500 1700 1900 2100

RPM

POW

ER

ABCDE

Full power from 1800 to 2100 rpm


Engine FeaturesEngine Features

C27 ACERTC27 ACERT


Design StrategyDesign Strategy

Leverage 3412E core V-12 structure structure and reduce percent of new content

Proven reliabilityThousands in operationDominates most high power

industrial segments

Leverage 3412E core V-12 structure structure and reduce percent of new content

Proven reliabilityThousands in operationDominates most high power

industrial segments



Leverage C15 / C18 technology• MEUI fuel system• Valve train comp.• Increased PCP designs• ACERT technology

Benefits of new technology• Emissions capability• Fuel efficiency• Power density

Leverage C15 / C18 technology• MEUI fuel system• Valve train comp.• Increased PCP designs• ACERT technology

Benefits of new technology• Emissions capability• Fuel efficiency• Power density



Current design from 3412E, C15 and C18

•Piston, rings, liners•Connecting rods•Intake manifolds•Modified 3412E block•MEUI injector•Valves, springs, seats•Cam lobes & bearings•Rod bearings

Current design from 3412E, C15 and C18

•Piston, rings, liners•Connecting rods•Intake manifolds•Modified 3412E block•MEUI injector•Valves, springs, seats•Cam lobes & bearings•Rod bearings

New designs •Cylinder head modified scaled from C15 / C18 •Rear gear train drive•Overhead cams•Front housing & gear train•ADEM 4TM ECM•Cross bolted main caps•Cam dampening system

New designs •Cylinder head modified scaled from C15 / C18 •Rear gear train drive•Overhead cams•Front housing & gear train•ADEM 4TM ECM•Cross bolted main caps•Cam dampening system


Design Strategy C27Design Strategy C27

Increased compression ratioComponent changes to increase peak

cylinder pressure capability• C27 - 18:1 compression ratio

Improves cold start characteristicsImproves white smoke clean up timeOptimizes ACERT performance

Increased compression ratioComponent changes to increase peak

cylinder pressure capability• C27 - 18:1 compression ratio

Improves cold start characteristicsImproves white smoke clean up timeOptimizes ACERT performance


Validation StrategyValidation Strategy

Rigorous endurance testingOver 40,000 hours per modelSpecialized tests include:

• Thermal abuse• Cold start qualification• Over speed qualification• Crankshaft structure• Head / block structure• Emissions certification

Rigorous endurance testingOver 40,000 hours per modelSpecialized tests include:

• Thermal abuse• Cold start qualification• Over speed qualification• Crankshaft structure• Head / block structure• Emissions certification


ACERT Multiple Injection Capability

ACERT Multiple Injection Capability

MEUI and ADEM 4 • Variable Injection timing• Controls quantity of fuel• Optimises fuel pressure• Transient control for both

speeds and loads

MEUI and ADEM 4 • Variable Injection timing• Controls quantity of fuel• Optimises fuel pressure• Transient control for both

speeds and loads


Fuel SystemFuel System

Mechanical Electronic Unit Injector• Proven design• Proven high reliability

Enhanced design• Multiple injection• Rate shaping• 30,000 PSI peak injection • pressure• Outstanding atomization• Improved combustion

Mechanical Electronic Unit Injector• Proven design• Proven high reliability

Enhanced design• Multiple injection• Rate shaping• 30,000 PSI peak injection • pressure• Outstanding atomization• Improved combustion


A4 Engine Control ModuleA4 Engine Control Module

Generations of Experience

19878-bit

PEEC II

1991Advanced

8-bitPEEC III

1993Two 8-bitADEM II

1998 32-bitADEM III

2004 32-bit

ADEM 4

Proven Reliability


A4 TestingA4 Testing

Extreme temperaturesVibration Salt spray

Electrostatic

Extreme temperaturesVibration Salt spray

Electrostatic


A4 SpecificsA4 Specifics

Processing speeds and memory increasedNew 120 Pin engine connector Retains 70 Pin OEM connectorMore fuel maps to optimize ACERT Technology

Better performanceBetter efficiency

Processing speeds and memory increasedNew 120 Pin engine connector Retains 70 Pin OEM connectorMore fuel maps to optimize ACERT Technology

Better performanceBetter efficiency


A4 SpecificsA4 SpecificsNo change in OEM / machine interfaceWorldwide service network

Using Cat ETCommon electronics from

C6.6 – C32Allows greater protection and prognosticsFull machine integration (Canbus, J1939, etc.)

No change in OEM / machine interfaceWorldwide service network

Using Cat ETCommon electronics from

C6.6 – C32Allows greater protection and prognosticsFull machine integration (Canbus, J1939, etc.)


New A4 FeaturesNew A4 Features

Throttle input strategy• Multi-throttle capability• Configures throttle input

priorityEngine control system options

• Full range governor• Min max governor

Speed droop control•Simulates mechanical fuel system performance•Adjustable from 0-10% droop

Throttle input strategy• Multi-throttle capability• Configures throttle input

priorityEngine 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 LinkA4 CAN J1939 Data Link

High speed 2-way communicationsStandard SAE link for all C-series enginesBroadcasts engine performance, status and diagnostic informationSupports messages for powertrain integrationInterface with Cat Messenger and analog gauges

High speed 2-way communicationsStandard SAE link for all C-series enginesBroadcasts engine performance, status and diagnostic informationSupports messages for powertrain integrationInterface with Cat Messenger and analog gauges


TurbochargerTurbocharger

Single wastegate turbocharger

Provides higher boost over wide range

Improves engine response

Outstanding low end performance

Improved peak torque

Single wastegate turbocharger

Provides higher boost over wide range

Improves engine response

Outstanding low end performance

Improved peak torque


Turbocharger Wastegate Function

BoostElevated BMEP

Improved Response

RPM


Turbocharger Wastegate Function

Wastegate Boost

Boost

Wastegate Active – Reduced BMEP

RPM


Cylinder HeadCylinder 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

High cam position• Power to drive injectors• Short accurate valve /

injector actuation• Optimize timing and

injection• Provides over speed

safety• Enhances performance

and economy



Crossflow design• Improved breathing• Reduce pumping loss• Better combustion• Improved performance• Improved power density• Improved efficiency

Crossflow design• Improved breathing• Reduce pumping loss• Better combustion• Improved performance• Improved power density• Improved efficiency



Single piece design• Rigid head becomes part of

the engine structure• Allows high cam position• Provides best power

density with lighter block• Reduces leaks

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 BlockCylinder Block

Cross bolted mains and new material• Allows higher PCP • Increased strength• Maintains critical alignment• Minimal weight impact• Optimizes ACERT

performance

Cross bolted mains and new material• Allows higher PCP • Increased strength• Maintains critical alignment• Minimal weight impact• Optimizes ACERT

performance

Cross tie bolts


Piston / Rod / LinerPiston / Rod / Liner

Leverage C15 / C18 iron into C27

Piston, liner, rod, cooling jet and piston pin

Validated componentsProven reliable componentsHigh volume componentsHigh parts commonality

Leverage C15 / C18 iron into C27

Piston, liner, rod, cooling jet and piston pin

Validated componentsProven reliable componentsHigh volume componentsHigh parts commonality


C27 Connecting Rod Assembly

C27 Connecting Rod Assembly

Connecting rod cap uses four bolts


PistonPistonMonosteel 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

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 LinerHardened Plateau Honed Liner

Smooth SurfaceTwo 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

Deep Cuts


Intake ManifoldIntake 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

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 TrainRear Gear Train

•Provides drive for twin overhead cams•Provides auxiliary drive capability•Lowers noise vs. front gear train designs•Only minimal increased length compared with 3412E

•Provides drive for twin overhead cams•Provides auxiliary drive capability•Lowers noise vs. front gear train designs•Only minimal increased length compared with 3412E


Front Gear TrainFront Gear Train

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

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

Pendulum


Leak Free DesignLeak Free Design

Advanced lower weight block designImproved joints through out the engine

• Oil pan seal• Timing cover• Block to flywheel housing

All fluid connections sealed with standard thread “O” ring design

Advanced lower weight block designImproved joints through out the engine

• Oil pan seal• Timing cover• Block to flywheel housing

All fluid connections sealed with standard thread “O” ring design


SpecificationsSpecifications

C27 ACERTC27 ACERT



Model C27

Rated RPM 2100

Displacement 27 L (1647 cu. In.)

Bore 137.2mm (5.402 in.)

Stroke 152.4mm (6.000 in.)



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 InformationMaintenance Information

500 hr. oil change interval with 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

filterS.O.S. sampling

500 hr. oil change interval with 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

filterS.O.S. sampling


High Efficiency Oil FiltersHigh Efficiency Oil Filters

Revolutionary filter design• Increased contamination

control• Double the efficiency without

increasing the changing interval

• Reduces wear on all oil lubricated surfaces

Revolutionary filter design• Increased contamination

control• Double the efficiency without

increasing the changing interval

• Reduces wear on all oil lubricated surfaces


ComparisonsComparisons

C27 vs. 3412EC27 vs. 3412E


C27 ACERT vs. 3412E Tier 2C27 ACERT vs. 3412E Tier 2Model C27 ACERT 3412E

Rated Power 671 kw (900 hp) 671 kw (900 hp)

Weight 2367 kg (5207 lbs) 2140 kg (4708 lbs)

Power Density 3.5 kg/kw(5.8lb/hp)

3.2 kg/kw(5.2lb/hp)

Max RPM 2100 2100Displacement 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


Advantages of C27 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

• 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


Advantages of C27 Advantages of C27

• Extended ratings up to 1100 hp

• Starts with leadership of the 3412E and improves it with higher technology

• High commonality with the popular C15 / C18 engines

• Extended ratings up to 1100 hp

• Starts with leadership of the 3412E and improves it with higher technology

• High commonality with the popular C15 / C18 engines

Date post:	19-Sep-2014
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ACERT C27

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