Navistar MaxxForce 15, Руководство по обслуживанию

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ENGINE SYSTEMS 9
Engine Specifications
MaxxForce® 15 Diesel Engine
Engine Configuration 4 stroke, inline six cylinder diesel
Advertised brake horsepower @ rpm See EPA exhaust emission label
Peak torque @ rpm See EPA exhaust emission label
Displacement 15.2 L (928 in 3 )
Compression ratio
16.0:1
Stroke 171.5 mm (6.75 in)
Bore (sleeve diameter) 137.2 mm (5.40 in)
Engine weight (dry, without trim or accessories) 1 429 kg (3,150 lbs)
Firing order 1-5-3-6-2-4
Engine rotation (facing flywheel) Counterclockwise
Aspiration
Dual turbocharged and Charge Air
Cooled (CAC)
Combustion system Direct injection turbocharged
Fuel system High-pressure common rail
Lube system refill capacity (including filter)
• Gravity drain from right rear and bottom front sump plugs 38 L (40 qts)
• Suction oil recovery option 34.5 L (36.5 qts)
Engine lubrication oil pressure at 99°C (210°F)
• 600 rpm
• 1,600 rpm
Minimum 83 kPa (12 psi)
275 - 550 kPa (40 - 80 psi)
Idle speed (no load) 600 rpm, nominal
Thermostat transition range (start open — full open) 88°C - 103°C (190°F - 217°F)
Engine Description
The MaxxForce® 15 diesel engine has been designed
for increased durability and reliability.
The cylinder head has four valves per cylinder with
centrally located fuel injectors directing fuel over
the pistons.
This configuration provides improved
performance and reduces emissions.
The overhead camshaft is supported by seven
bearings in the cylinder head. The camshaft gear is
driven from the front of the engine. The overhead
valve train includes roller rocker arms and dual valves
that open using a valve bridge.
The MaxxForce® 15 engine uses one piece forged
steel pistons. Cooling jet cutouts and feed holes are
placed on both sides of the pistons.
Pistons may
be installed in either direction however pistons are
originally installed with casting bump on bottom of pin
boss toward rear of engine.
The one piece crankcase can withstand high-pressure
loads during operation.
The crankcase uses
replaceable wet cylinder sleeves that are sealed by a
system of three O-rings.
Sound shields are strategically placed on the engine
to reduce noise.