Mobility Solutions

Milestone for fuel-saving technology Five million Bosch start/stop starters

  • Five million start/stop starters since production began at the end of 2007
  • Up to 5 percent less fuel and CO2 consumption in the standard cycle
  • Every second new vehicle in Europe will have a start/stop system by 2013
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  • December 19, 2011
  • Mobility Solutions
  • Press releases

press release

Bosch has produced its five millionth start/stop starter in Hildesheim. Since production began in 2007, more and more orders have come in for this fuel-saving technology. The reason for this huge success is simple. “Start/stop is a cost-effective way to reduce fuel consumption considerably,” says Dr. Ulrich Kirschner, president of the Bosch Starter Motors and Generators division. “We are expecting every second new car in Europe to be fitted with a start/stop system by 2013,” Kirschner says. Currently, this is true of one new car in three. Almost all European automakers are now integrating Bosch start/stop technology – into compact cars, premium sedans, and even powerful sports cars.

In the New European Driving Cycle (NEDC), start/stop systems reduce fuel consumption, and thus CO2 emissions, by up to 5 percent. In the NEDC urban cycle, the saving is as much as 8 percent. In heavy urban traffic, especially during peak hours, the potential saving is even greater. And yet start-stop does not reduce comfort in any way, thanks to the wide array of sensor information evaluated by the system. For instance, a battery sensor determines the battery’s state of charge. Only if a quick restart is guaranteed will the engine be stopped. Another example is the vehicle’s interior temperature. If it is still very cold or too hot, the engine will continue to run so that the occupants’ desired temperature is reached quickly. 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 interruption.

In order to further reduce consumption, and thus CO2 emissions, Bosch engineers will in future gradually extend engine shutdown-times. This will apply initially to the time when the vehicle is rolling to a halt, and later even to periods when the driver is merely no longer accelerating. “Depending on the type of route, the enhanced start-stop systems can save an additional 10 percent of fuel,” Kirschner says.

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.”

Further information is available online at and,

PI7408 - December 19, 2011

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