Mobility Solutions

Bosch HD series First 28-volt alternators with LIN interface Variable control reduces fuel consumption and CO2 emissions

  • A world first: smart charging control now also in 24-volt on-board networks
  • Longer battery service life and lower fuel consumption
  • HD alternator series with wide range of variants
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  • September 18, 2012
  • Mobility Solutions
  • Press releases

press release

For its heavy-duty (HD) series of commercial-vehicle alternators, Bosch will be offering a new regulator with a LIN interface in the future. “Our new regulator is the first to give vehicle makers the possibility of smart control of alternators, also in 24-volt on-board networks,” says Dr. Ulrich Kirschner, the president of the Bosch Starter Motors and Generators division. Improving the connection to the on-board electronics makes an adapted charging strategy possible, which can prolong the life of the battery and save fuel, for example.

Bosch HD alternators: long-lasting and powerful
The Bosch HD series comprises diverse performance classes and optional variants that can be combined variably. This allows commercial-vehicle manufacturers to find the alternator that perfectly suits to their application. An efficient cooling system and high-quality bearings ensure a high level of reliability. At the top end of the range, there are 28-volt variants with a nominal current of 150 amperes at 6,000 revolutions per minute and an average efficiency of 77 percent (80 percent maximum). The available options include enhanced heat resistance and an extension of service life to as much as 1.2 million kilometers.

Compared with a PWM (pulse-width modulation) interface, the serial LIN (local interconnect network) bus allows more extensive, bi-directional communication between the alternator and the engine management system. As a result, charging voltage can now be adapted variably via a standardized interface, and in this way the service life and availability of the battery improved. In addition, the alternator can be completely switched off – during acceleration, for example. In overrun conditions, by contrast, its performance potential is exploited to the full. Depending on overall concept, this can reduce the fuel consumption of a heavy truck by as much as one percent – a cost factor which cannot be underestimated in commercial vehicles with high mileage. Moreover, a LIN allows as many as four parallel alternators to be synchronized in an on-board network – an option that is especially used in buses. For the electrical connections, a proven 5-pin connector is used.

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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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PI7815 - September 18, 2012

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