Mobility Solutions

More safety when changing lane or reversing out of a parking space Bosch mid-range radar for rear-end applications 77 gigahertz technology allows global use

  • Support when changing lane or reversing out of a parking space
  • Far more precise positioning than with 24-gigahertz systems
  • Easy to integrate thanks to compact dimensions
  • Suitable for universal use on the globally approved 77-gigahertz band
  • Cost-effective radar platform for assistance functions in the middle and compact classes
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  • October 29, 2012
  • Mobility Solutions
  • Press releases
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press release

In 2014, Bosch will be launching a new radar system for rear-end applications, based on the 77-gigahertz frequency band. A leading European automaker will be deploying the Bosch MRR rear mid-range radar sensor, which can precisely locate vehicles in blind spots or approaching from behind. Compared to today's 24-gigahertz solutions, this sensor is much more precise, with up to three times the ability to distinguish between objects and up to five times more accurate measurement of speed and distances. “With a range of up to 100 meters and an aperture angle of up to 150 degrees, the sensor is able to detect dangerous situations in the area to the rear of the vehicle at an early stage," says Gerhard Steiger, the president of the Bosch Chassis Systems Control division. “Its exceptional distance resolution and accurate speed measurement ensure the driver knows exactly what is going on.”

Two sensors, hidden one each to the left and right in the vehicle's rear bumper, monitor the area beside and behind the vehicle. If another car is in the blind spot or is approaching at speed from behind, a lane-change assistant can warn the driver in time. Reversing out of a parking space no longer poses a problem, even when the driver's view is blocked by obstacles. The MRR rear reliably warns of any approaching vehicles.

Positioning quality significantly improved
Based on the expertise Bosch has accumulated over three generations of radar design, MMR rear allows the automaker to integrate a wide range of safety and convenience functions. The technical basis for this is provided by what is known as bistatic frequency-modulated continuous-wave (FMCW) radar with four receiver channels. Its higher operating frequency, wider modulation bandwidth, and four receiver channels make the quality of its continuous positioning far superior to standard 24-gigahertz systems. The relative speed and distance of another vehicle is measured using the Doppler effect – in other words, the frequency shift between the emitted and received signal – and the time difference between the two signals. The vehicle's current position can be determined by comparing the reflected signals picked up by the four discretely positioned receiver antennas.

The silicon-germanium technology used in the integrated high-frequency circuits does without moving parts. Thanks to a compact design that makes use of space-saving planar arrays, the system is easy to integrate into a vehicle's body, for example hidden behind the bumper.

Additional functions with front-end version of the mid-range radar
The front-end version of MRR, which was developed in parallel, has an even greater range of up to 160 meters, with an aperture angle of up to 45 degrees. On the basis of just one sensor, an emergency braking system working in conjunction with the ESP® electronic stability program can take action to avoid or reduce the severity of an accident. Its data can also be fed into the ACC adaptive cruise control. This function automatically brakes and accelerates to maintain a predetermined distance from the vehicle in front, and can tell drivers how far away they are from the vehicle in front. Here again, MRR provides a cost-effective basis for many assistance and safety functions – especially for the middle and compact classes.

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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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PI7803 - October 29, 2012

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