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The M62 is BMW's powerful 4.4-liter V-8 engine,
replacing the M60. Also available as a 3.5-liter,
the M62 is used in BMW models
like the E39
5 Series Sedan, the
E38 7
Series, the E31
8 Series and the
X5 SAV.
A further stage in the development of the BMW V-8
engine went into production in 1996. The main aims of this iteration were
a reduction in fuel consumption, a decrease in noise emissions and an
increase in torque. To these ends, the displacements of the two versions
were increased to 3.5 liters and 4.4 liters. The output of the smaller
engine rose to 235 bhp while that of the larger one remained the same.
In order to reduce internal friction and thus fuel
concumption, as well as noise, single-row (simplex) timing chains were
introduced and the inertia of the valve gear was reduced. In order to
provide an operating temperature that was optimal at all times, the
thermostat was now controlled depending on the engine's operating
condition ("map-controlled thermostat").
In 1998 the V-8 engine was given the VANOS variable
cam timing system. This led to a further increase torque for both engines
and an extra 10 bhp for the 3.5-liter engine. In addition, it provided
reductions in both exhause emissions and fuel consumption in the lower
load range.
source: Geschichte des Motors, Dr. Karlheinz Lange |
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Engine
Specifications |
| Item/Measurement |
M62B35 |
M62B44 |
M62B35 |
M62B44 |
| Vehicle |
735i, 535i |
740i, 540i |
735i, 535i |
740i, 540i |
| Number of Cylinders |
8 |
8 |
8 |
8 |
| Layout |
vee 90 |
vee 90 |
vee 90 |
vee 90 |
| Installation |
longitudinal |
longitudinal |
longitudinal |
longitudinal |
| Coolant |
liquid |
liquid |
liquid |
liquid |
| Crankcase/Block Material |
aluminum |
aluminum |
aluminum |
aluminum |
| Crankshaft |
one-piece |
one-piece |
one-piece |
one-piece |
| Main Bearings |
5 |
5 |
5 |
5 |
| Weight (kg) |
219 |
219 |
221 |
221 |
| Valve Layout |
dohc |
dohc |
dohc |
dohc |
| Camshaft Drive |
2 simplex chains |
2 simplex chains |
2 simplex chains |
2 simplex chains |
| Camshaft Bearings |
5 each |
5 each |
5 each |
5 each |
| Valves per Cylinder |
4 |
4 |
4 |
4 |
| Cylinder Center Distance (mm) |
98 |
98 |
98 |
98 |
| Displacement (liters) |
3.498 |
4.398 |
3.498 |
4.398 |
| Bore/Stroke (mm) |
84/78.9 |
92/82.7 |
84/78.9 |
92/82.7 |
| Stroke/Bore Ratio |
0.94 |
0.90 |
0.94 |
0.90 |
| Piston Speed (ms) |
15.0 |
15.7 |
15.3 |
14.9 |
| Valve Timing (IO/IC) |
12°btdc/46°abdc |
8°btdc/50°abdc |
4°atdc/62°abdc |
4°atdc/62°abdc |
| (EO/EC) |
42°bbdc/6°atdc |
42°bbdc/6°atdc |
31°bbdc/17°atdc |
38°bbdc/10°atdc |
| At Valve Lift (mm) |
ER-ER |
ER-ER |
ER-ER |
ER-ER |
| Valve Lift I/E (mm) |
9.0/9.0 |
9.0/9.0 |
9.0/9.0 |
9.0/9.0 |
| Connecting Rod Length (mm) |
143 |
143 |
143 |
143 |
| Connecting Rod Ratio r/l |
0.28 |
0.29 |
0.28 |
0.29 |
| Compression Ratio |
10.0:1 |
10.0:1 |
10.0:1 |
10.0:1 |
| Fuel |
Norm-Sup Plus LF |
Norm-Sup Plus LF |
Norm-Sup Plus LF |
Norm-Sup Plus LF |
| Power Output (bhp@rpm) |
235/5700 |
286/5700 |
245/5800 |
286/5400 |
| Power per Liter (bhp/liter) |
67.18 |
65.03 |
70.04 |
65.03 |
| Power/Weight Ratio (kg/bhp) |
0.93 |
0.77 |
0.90 |
0.77 |
| Torque (mkg@rpm) |
32.6/3300 |
42.8/3900 |
35.2/3800 |
44.9/3600 |
| Torque per Liter (mkg/liter) |
9.33 |
9.73 |
10.05 |
10.2 |
| Mixture Preparation |
fuel injection |
fuel injection |
fuel injection |
fuel injection |
| Maker |
Bosch |
Bosch |
Bosch |
Bosch |
| Designation |
DME M5.2 |
DME M5.2 |
DME M7.2 |
DME M7.2 |
| Ignition |
integrated |
integrated |
integrated |
integrated |
| Ignition Advance |
map |
map |
map |
map |
| Generator |
- |
- |
- |
- |
| Supercharging |
- |
- |
FCG |
FCG |
| Miscellaneous |
KD |
KD |
VANOS, KD |
VANOS, KD |
| Year of Introduction |
1996 |
1996 |
1998 |
1998 |
source:
Geschichte des Motors, Dr. Karlheinz Lange
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