CAC Gasoline Engine Maintenance And Servicing Manual
12
Main engine technical indexes and operation parameters
CAC478C CAC480C CAC480M
Type Line,4-cyl, four strokes, water-cooling ← ←
Cylinder bore diameter(mm) 77.24 79.94 ←
Stroke(mm) 74.30 79.52 ←
Total displacement(L) 1.392 1.596 ←
Compression ratio 9.5∶1 9.75∶1 9.75∶1
Nominal power/RPM 54/5500 60/5500 62/5500
(kW/r/min)(Total power)
Output maximum torque/RPM 105/3000-3500 128/3000-3500 128/3000-2500
(Nm/r/min)(Total power)
Minimum fuel consumption of
total power for external characteristic 298 290 285
(g/KW·h)
Fuel supply system Carburetor ← Single-point
electric control fuel injection
Combustion chamber shape Wedge type Hemisphere type Hemisphere type
Cylinders Working Order 1-3-4-2 ← ←
Direction of crankshaft rotation Clockwise(Viewed ← ←
from the front)
Lubrication Mechanical lubrication+Splash feed ← ←
Idling speed r/min 850±50 ← 900±50
Emission(Idling)CO 2% ← 1.2%
Weight (kg) 105 108 108
Overall dimensions
(Length * width * highness) 670×630×650 670×630×650 620×610×650
(mm)
Ignition angle at idle
(Crankshaft angle 7°±1° 7°±1° 10°±1°
，Before top dead center)
Valve timing(Crankshaft angle)
Intake valve opened Before top dead center18° ← ←
Intake valve closed After bottom dead center50 57° ←
Exhaust valve opened
before bottom dead center 61° 60° ←
Exhaust valve closed
After top dead center 7° 15° ←
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