Mobility Solutions

The new powerhouses Bosch Power Density Line generators Small, light, and compact thanks to high power density

  • High efficiency of up to 80 percent
  • Extremely low noise levels
  • “Local for local” availability on a global scale
Add to my press materials
Save text
  • September 10, 2013
  • Mobility Solutions
  • Press releases

press release

The latest addition to the range of Bosch generators once again reflects the trend toward increasingly compact and lightweight vehicle components. “The compact Power Density Line (PL) generator combines proven technology with innovative components,” says Dr. Ulrich Kirschner, president of the Bosch Starter Motors and Generators division. By developing a new flat pack winding technique for the stator, the Bosch engineers have achieved unprecedented power densities while at the same time significantly reducing the component's copper content. “The PL series of generators fulfills the demanding requirements of high-end carmakers,” adds Kirschner.

The new PL generator is scheduled to go into series production in 2014, with a choice of models ranging in output from 1.5 to 3 kilowatts.

Small footprint and high performance
The exceptionally high power density of the PL generator allows it to be installed in even the most confined spaces of the engine compartment. Its diameter ranges from 134 to 144 millimeters – depending on the variant – and it delivers an output of between 130 and 250 amps at an engine speed of around 2,000 rpm. All models are capable of withstanding engine compartment temperatures of up to 125°C.

Optimized for lower fuel consumption and CO2 emissions
The efficiency of the new PL product range is on par with that of the Bosch Efficiency Line generators. Efficiency of 76 or 80 percent can be achieved through the use of high-efficiency diodes (HED) or active rectification (SAR), both available as an option. These features reduce the mechanical energy the generator requires in order to generate power for the electrical consumers in the vehicle. The generator's high efficiency and ten-percent lower weight compared to today's models will help vehicle manufacturers to achieve further reductions in fuel consumption and CO2 emissions.

If the generator control unit is equipped with an analog or digital communications interface such as LIN (Local Interconnected Network), it is possible to implement smart functions that enable a higher proportion of the electrical energy to be generated during vehicle coasting, resulting in additional fuel savings of up to two percent.

Extremely low noise levels
Reducing the noise transmitted to the interior of the vehicle is a particularly important concern in the high-end segment. Here too, the performance of the new range of PL generators has been optimized compared to its predecessors. The use of the five-phase winding significantly reduces magnetic noise, especially when the engine is running at low speed, for instance during idle. Aerodynamic noise at high engine speeds has been almost halved by modifying the design of the generator cooling fan.

Global availability from the beginning
Production of the new generators will be launched in Europe and Asia in early 2014, and shortly afterwards in North America. This schedule ties in with the continuing globalization of vehicle platforms. Bosch associates in each region will be responsible for adapting applications to local requirements. This approach enables Bosch to offer high-quality products to customers throughout the world that meet the highest quality standards and at the same time can be adapted to the needs of specific regional markets.

Click here to find further information.

At the 65th International Motor Show in Frankfurt, Bosch is showcasing technical solutions for connected mobility. A variety of innovations are helping to make road traffic cleaner and more efficient, as well as safer and more comfortable. Bosch is exhibiting its highlights at booth A04 in hall 8.

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,

PI8265 - September 10, 2013

Your contact person for journalists

Jutta Hofmann

Share this information