Page 52 - E BOOK ENGINE MECHANICAL M2

2. TECHNICAL FEATURES OF 4D56 ENGINE

1. MAJOR SPECIFICATIONS (2014MY)
The 4D56 Engine has a DOHC valve arrangement. It employs a common rail system that allows this
engine to have lower fuel consumption and higher outputs, a reduction of exhaust gases and noises.
The timing belt is used to reduce engine noise, and a tensioner maintains a constant belt tension.
The balancer shaft used reduces engine vibration.

4D56 with inter-cooler turbocharger 4D56 with inter-cooler turbocharger
Item
(Standard) (High Power)
Total displacement mL 2,477
Bore × Stroke mm 91.1 × 95.0
Compression ratio 17 16.5
Compression chamber Direct injection type
Intake opening
(BTDC) 20° 13°
Intake closing
40° 30°
Valve (ABDC)
timing Exhaust opening
(BBDC) 38° 38°
Exhaust closing
22° 22°
(ATDC)
Maximum output kW/rpm 100/ 3,500 131/ 4,000
Maximum torque Nm/rpm 400/ 2,000-2,850 (M/T)
314/ 2,000
350/ 1,800-3,500 (A/T)
Fuel system Common rail fuel injection

2. TECHNICAL FEATURES

(1) Cooling Fan
A six-blades fan is used to increase the total airflow vol-
ume.

Fig. 2-1

(2) Cylinder Block
To reduce the residual sand of a cast within the water
jacket, the water hole shapes on the upper surface of
the cylinder block are increased maintaining the current
change amount of the cylinder.
The cylinder liner sleeve have been deleted without
compromising durability.
To bring the smooth flow of the cooling fluid along the
No sleeve Water jacket cylinder liner, a corrugated type liner is used for the
Fig. 2-2 cross sectional area of the water jacket.

(3) Cylinder Head
The cylinder head is a DOHC and corresponds to a
cross flow.
Intake port
Two kinds of longitudinal intake ports are used.

Intake port
Fig. 2-3

2 - 1 Pub. No. PTAE1228