Mitsubishi Outlander (2013+). Manual — part 125
GENERAL INFORMATION
ENGINE MECHANICAL
11-2
GENERAL INFORMATION
M2112000102444
Two types of engines are available; 4B11 (1,998 cc)
and 4B12 (2,360 cc).
These engines have adopted the following features:
• MIVEC (Mitsubishi Innovative Valve timing Elec-
tronic Control system) for the intake valves
• Cylinder block made of an aluminium alloy
• Valve train with direct-acting valve tappets
• Silent timing chain
• Unit type balancer<4B12>
MAIN SPECIFICATIONS
Item
Specification
Engine model
4B11
4B12
Total displacement cc
1,998
2,360
Bore
× stroke mm
86
× 86
88
× 97
Compression ratio
10.0
10.5
Combustion chamber
Pentroof type
Valve timing
Intake opening
28
° BTDC − 3° BTDC
40
° BTDC − 0° BTDC
Intake closing
45
° ABDC − 20° ABDC 64° ABDC − 24° ABDC
Exhaust opening
BBDC 39
°
BBDC 39
°
Exhaust closing
ATDC 5
°
ATDC 5
°
Maximum output (EEC net) kW / r/min
107 / 6,000
123 / 6,000
Maximum torque (EEC net) N
⋅m / r/min
196 / 4,200
222 / 4,100
Fuel injection system
Electronically controlled multipoint fuel injection
Ignition system
Electronically controlled 4-coil
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BASE ENGINE
ENGINE MECHANICAL
11-3
BASE ENGINE
M2112001002194
CYLINDER HEAD RELATION
1. CYLINDER HEAD COVER
• A Plastic cylinder head cover has been adopted.
2. PCV VALVE
3. FRONT CAMSHAFT BEARING CAP
• On each camshaft, the thrust load is supported
by No. 4 bearing. The No. 1 bearings for the
intake and exhaust camshafts have a common
bearing cap.
4. CAMSHAFT BEARING CAP
• Each of the intake and exhaust camshafts is sup-
ported by five bearings.
5. CAMSHAFT BEARING
6. OIL FEEDER CONTROL VALVE
7. OIL FEEDER CONTROL VALVE FILTER
8. CYLINDER HEAD
• The cylinder head is made of aluminium alloy,
which is lightweight and has an excellent cooling
efficiency. The intake and exhaust ports are
arranged in a cross-flow construction. Each cylin-
der has a pair of intake ports on one side and a
pair of exhaust ports on the other side.
9. CYLINDER HEAD GASKET
• A dual-layer, metal type cylinder head gasket that
excels in heat resistance and sealing perform-
ance has been adopted.
10.VALVE GUIDE
• Valve guides that are common to both the inlet
and exhaust have been adopted.
11.VALVE SEAT
• Sintered alloy valve seats have been adopted.
12.CAMSHAFT POSITION SENSOR
AKB00849
Oil feeder control
valve filter
Oil hole
Water hole
Cylinder head gasket
Valve guide
Front camshaft
bearing cap
Camshaft bearing cap
PCV valve
Cylinder head cover
Valve seat
Camshaft
bearing
Cylinder head
Oil feeder control valve
Water hole
AB
Camshaft position
sensor
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BASE ENGINE
ENGINE MECHANICAL
11-4
CYLINDER BLOCK
A cylinder block made of an aluminium alloy has
been adopted for weight reduction.
Five bearings are provided for the crankshaft jour-
nals and the No. 3 bearing sustains the thrust load of
the crankshaft.
The water jacket is the full Siamese type.
1. CYLINDER BLOCK
• The cylinder block is made of lightweight alumin-
ium alloy.
The water jacket is of a full-seamless design.
2. CRANKSHAFT BEARING CAP
• The crankshaft journal is supported by four bear-
ings. The crankshaft thrust load is supported by
No. 3 bearing.
3. LADDERFRAME
AKB00850
Cylinder block
Ladder frame
Crankshaft oil seal
Crankshaft bearing cap
AB
Item
4B11
4B12
Overall height
mm
230.1
240.1
Bore mm
86
88
Bore pitch mm
96
96
Stroke mm
86
97
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BASE ENGINE
ENGINE MECHANICAL
11-5
PISTON RELATION
1. PISTON
• The pistons are made of a special aluminium
alloy. Their weight has been reduced by lowering
their overall height and increasing the depression
at each end of the piston pin. The piston pin hole
centre is offset 0.8 mm towards the thrust side of
the piston centre. The skirt portion along the
perimeter of the piston is finished with streaks
that excel in oil retention and seizure resistance.
2. PISTON PIN
• The piston pin is of a semi-floating type, press-fit-
ted into the connecting rod small end while capa-
ble of floating relative to the piston.
3. CONNECTING ROD
• The connecting rod is made of highly rigid, forged
carbon steel. The rod portion has an H-shaped
cross section. The connecting rod big end bear-
ing is lubricated through an oil passage running
from the main journal to the crankshaft pin.
4. PISTON RING
• Each piston is provided with No. 1 and No. 2
compression rings and an oil ring.
5. CONNECTING ROD BEARING
• The upper and lower connecting rod bearing
halves are identical. The connecting rod bearing
is equipped with back metal. While the bearing
itself is made of aluminium alloy, the back metal
is normally made of steel sheet. The connecting
rod bearing is narrower than the bearing cap, this
is to minimize wear.
AKB00851
AB
Piston ring No.1
Spacer
Rail
Maker mark
Piston ring No.2
Oil ring
Piston ring No.1
Piston ring No.2
Oil ring
Connecting rod bearing
Connecting
rod
Piston
<4B11>
<4B12>
Piston pin
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