Page 214 - Mechatronics with Experiments

Torque Engine graph SAE J1995 gross Power
Ib ft Nm A25D engine D10B kΩ hp
1700 260
340
1200
1600 240
(1*)
1100 1500 220 300
Power
1400 200
1000 260
1300 180
900 1200 160 220
Torque
800 1100 (2*) 140 180
1000 120
700 140
900 100
600 800 80
100
700 60
500
60
600 40
400
500 20
500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100
Engine Speed rpm
A25D engine
Make, model Volvo D10B ACE2/ADE2 Max. torque at 22 r/s (1350 rpm)
Max. power at 33 r/s (1998 rpm) SAE J1995 gross 1375 Nm (1014 Ibf ft) 2*
SAE J1995 gross 228 kW (306 hp) 1* SAE J1349 net 1365 Nm (1007 Ibf ft)
3
Flywheel power at 33 r/s (1998 rpm) Displacement 9,6 I (586 in )
SAE J1349 net 227 kW (304 hp)
(a)

Ib × 1000 kp × 1000 1

30 NMW GMW
4
60 A25D
25 D10 50%
50
20 40%
40
Gear 1
15 30%
30 Grade
10 Gear 2 20%
20
Gear 3
10 5 Gear 4 Gear 5 Gear 6 10%

0 0
0 5 10 15 20 25 30 35 40 45 50 55 20 30 40 50
km/h kg × 1000
0 5 10 15 20 25 30 35 40 60 80 100
mph Ib × 1000
Vehicle speed 2 3
Vehicle
weight
(b)
FIGURE 3.36: Engine lug curve, machine speed versus rim pull force capacity: (a) engine lug
curve for torque and power output as a function of engine speed at full throttle, (b) rim pull
force at different gear ratios and machine speeds. In order to determine the maximum uphill
grade the machine can climb at a given speed and machine weight, draw a vertical line from
the desired machine speed to the rim pull curve, from there draw a horizontal line to the grade
curve. Read the grade value which this horizontal line crosses for the machine weight
(Reproduced with permission from Volvo Trucks).