Starter Motors and Generators
Bosch starter motors – the power packs
in miniature for reliable engine start
Invented for life
Starter motors: reliable, light and compact
Bosch starter motors for passenger cars are
available in a wide variety of series and sizes, and
are successfully employed worldwide in an enormous variety of vehicles with gasoline and diesel
engines. To increase their efficiency and performance, Bosch has constantly been improving the
key starter motor components, making them ever
smaller. Our Series C, R, and S starter motors have
convincing performances of up to 2.5 kW, combining reliable operation and a long lifetime with low
weight and compact design. The minimal space
requirements of these reduction-gear starter
motors offer additional design freedom for vehicle
developers.
Product description
Output up to 2.5 kW
Bosch starter motors stand for high performance,
Further development work on the permanent
long life, outstanding quality, and reliability. Our
magnets en-abled the starter motor to be designed
product portfolio comprises a wide range of
for output powers up to 2.5 kW. This is appropriate
innovative starter motors for passenger cars.
for gasoline engines with displacements in excess
Robust, technologically mature solutions for gas-
of 6.2 l and for diesel engines up to 4.0 l.
oline and diesel engines which fulfill the requirements of vehicle manufactures and offer the best
Advantages of Bosch starter motors:
possible starting reliability – even in the toughest
▶ Lower fuel consumption thanks to reduced weight
of conditions. Thanks to their lightweight, com-
▶ High torques for high power outputs
pact design, our starter motors help to reduce
▶Reliable operation throughout the vehicle’s
fuel consumption and emissions, while their
service life
small size gives automotive engineers additional
▶ Quiet operation
design freedom. Based on these reduction-gear
▶ Maintenance-free
starter motors we offer starting solutions to
▶ Low installation-space requirements
match every kind of passenger car – with a high
▶ Reliable functioning even at very low temperatures
power-to-weight ratio and the highest build quality.
▶ Corrosion-resistant
In addition to these conventional starter motors,
Bosch supplies efficient start-stop starter motors
for especially economical and environmentallyfriendly start-stop systems.
Starter Motors and Generators | Bosch starter motors – the power packs in miniature for reliable engine start
Innovative design: for universal use
Start-stop starter motors:
Bosch start-stop starter motors offer a wide range
lower fuel consumption, fewer emissions
of functions and performance. They are suited to
Ideally, conventional starter motors can contribute
use in a variety of vehicles, gasoline or diesel, man-
toward small reductions in fuel consumption and
ual or automatic. Due to their compact dimensions,
emissions via lightweight construction. But start-
they are as easy to install in the vehicle as a con-
stop starter motors from Bosch reduce both CO₂
ventional starter motor.
output and fuel consumption in real urban traffic
by up to 15 % – and thanks to their robust con-
Robust technology: for a vehicles entire life
struction, they last a whole vehicle life. Our experi-
The number of starting operations performed by
ence in series utilization impressively confirms this.
the starter motor, its lifetime in other words, has
been considerably increased for this special appli-
The operating principle behind start-stop systems
cation. Greater design strength has enabled the
is as simple as it is efficient: when the vehicle
starter motor to survive the more frequent starts
comes to a stand and providing the battery charge
throughout the lifetime of the vehicle without suf-
is adequate, the combustion engine is switched
fering damage.
off and automatically restarted when needed by
The following measures have been undertaken:
releasing the brake pedal. So when traffic comes
to a stop, in jams or at a red light, for instance, no
fuel is consumed nor any CO₂ emitted. And noise
▶Strengthening of bearings subjected to heavy
emissions also drop to zero.
loading
▶Further improved planetary gear
▶Use of strengthened pinion-engaging mechanics
▶Optimization of commutator system
Application
Start-stop starter motor type
Output
class
Gasoline
Diesel
Type
Diameter
(mm, D)
Length
(mm, L)
Weight
(kg)
1.0 kW
~ 1.6 l
~ 1.2 l
SC60-M
61
149
2.0
1.2 kW
~ 2.0 l
~ 1.4 l
SC70-S
70
166
2.8
1.4 kW
~ 3.0 l
~ 1.6 l
SC70-M
70
170
2.9
1.7 kW
~ 4.0 l
~ 2.0 l
SC70-L
70
180
3.1
2.2 kW
~ 6.2 l
~ 3.0 l
S74-E+
74
183
3.5
2.5 kW
—
~ 4.0 l
S78-M
78
188
4.3
Main dimension – Start-stop starter motor SC70-M
⌀D
Robert Bosch GmbH
Starter Motors and Generators
(L)
© 2013. Robert Bosch GmbH reserves all rights even in the event of industrial property rights.
We reserve all rights of disposal such as copying and passing on to third parties.
Postfach 30 02 40
70442 Stuttgart
Germany