Mobility Solutions

Anniversary for fuel-saving technology Ten million Bosch start-stop starter motors Easy integration into all vehicle classes

  • Ten million Bosch start-stop starter motors since production began at the end of 2007
  • Up to 5 percent less CO2 and fuel consumption in the standard driving cycle
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  • July 31, 2013
  • Mobility Solutions
  • Press releases

press release

The ten millionth start-stop starter motor produced by the Bosch global manufacturing network recently rolled off the line at Bosch's Hildesheim site. Since series production began in 2007, more and more orders have come in for this fuel-saving technology. “We have already reached the stage where every second new car manufactured in Western Europe is equipped with a start-stop system. Many models already feature start-stop system as standard, and ambitious international CO2 emission targets are guaranteed to add further momentum to the dynamic market for start-stop systems,” says Dr. Ulrich Kirschner, president of the Bosch Starter Motors and Generators division. The reason for this huge success is simple. “Start-stop is a cost-effective way to considerably reduce fuel consumption,” says Kirschner. Almost all European automakers are now integrating Bosch start-stop technology – into compact cars, premium sedans, light trucks and even in powerful sports cars. Interest in this fuel-saving technology is also on the rise in the U.S. and China.

In the New European Driving Cycle (NEDC), start-stop systems reduce fuel consumption, and thus CO2 emissions, by up to 5 percent. In the urban cycle of the NEDC, the savings are up to 8 percent. In heavy urban traffic, especially during peak hours, the potential savings are even greater. The system works conveniently in the background, and evaluates a wide array of sensor information before being activated. For instance, a battery sensor determines the battery's level of charge; only if a quick restart is guaranteed will the engine be switched off when the vehicle is stopped. Another example is the vehicle's cabin temperature. If the cabin temperature is too cold or too hot, the engine will continue to run until the occupants' desired temperature is reached. Finally, there is a DC/DC converter for stabilizing the voltage of the electrical system during starts to ensure that the radio, navigation system, or hands-free telephone operate without any interference or interruption.

Zero consumption, even while driving
In order to further reduce consumption, and thus CO2 emissions, Bosch engineers are continually working to extend engine shutdown times. This will apply initially to the time when the vehicle is coasting to a stop; by 2016 it will also apply to periods while driving, when the driver is not accelerating. The effectiveness of all safety and comfort functions is still guaranteed, even during these longer periods with the engine switched off. “Depending on the type of driving, the enhanced start-stop systems will save up to an additional 10 percent of fuel,” says Kirschner.

Additional YouTube links:
Bosch start-stop system for manual transmission:
Bosch start-stop system for automatic transmission:

Click here to find further information.

Mobility Solutions is the largest Bosch Group business sector. In 2015, its sales came to 41.7 billion euros, or 59 percent of total group sales. This makes the Bosch Group one of the leading automotive suppliers. The Mobility Solutions business sector combines the group’s expertise in three mobility domains – automation, electrification, and connectivity – and offers its customers integrated mobility solutions. Its main areas of activity are injection technology and powertrain peripherals for internal-combustion engines, diverse solutions for powertrain electrification, vehicle safety systems, driver-assistance and automated functions, technology for user-friendly infotainment as well as vehicle-to-vehicle and vehicle-to-infrastructure communication, repair-shop concepts, and technology and services for the automotive aftermarket. Bosch is synonymous with important automotive innovations, such as electronic engine management, the ESP anti-skid system, and common-rail diesel technology.

The Bosch Group is a leading global supplier of technology and services. It employs roughly 375,000 associates worldwide (as of December 31, 2015). The company generated sales of 70.6 billion euros in 2015. Its operations are divided into four business sectors: Mobility Solutions, Industrial Technology, Consumer Goods, and Energy and Building Technology. The Bosch Group comprises Robert Bosch GmbH and its roughly 440 subsidiaries and regional companies in some 60 countries. Including sales and service partners, Bosch’s global manufacturing and sales network covers some 150 countries. The basis for the company’s future growth is its innovative strength. Bosch employs 55,800 associates in research and development at 118 locations across the globe. The Bosch Group’s strategic objective is to deliver innovations for a connected life. Bosch improves quality of life worldwide with products and services that are innovative and spark enthusiasm. In short, Bosch creates technology that is “Invented for life.”

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PI8149 - July 31, 2013

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