Bosch Sensor helps engine management systems reduce fuel consumption and emissions

This year’s Electronica in Munich, Germany, Bosch launches the SMP580, a new barometric pressure sensor for ambient pressure and temperature measurement in automotive engine management applications. Barometric pressure sensors are a key component in engine management. The SMP580 measures the current ambient barometric pressure, which continuously fluctuates based on altitude, weather conditions and ambient temperature.

  • Digital interface for air pressure and temperature
  • Applications in engine management and seat comfort systems
  • Ultra-compact, robust package is smallest on market
  • Very high measurement accuracy 

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The engine management system utilizes the sensor data to seamlessly adjust the optimum air-fuel mixture. This reduces fuel consumption as well as CO2 emissions and other pollutants. Having the ideal air-fuel mixture also helps to maximize engine performance and lowers engine noise.

Compact and accurate

The SMP580 is the smallest sensor of its type available on the market – it comes in a robust, ultra-compact SOIC8 cavity package measuring only 4.9 x 3.9 x 1.5 mm³. A wheatstone bridge together with piezo-resistors transforms the movement of a flexible membrane into a varying electrical current, which is processed and calibrated by an integrated ASIC.

The new sensor delivers very high measurement accuracy and long term stability, with a highly accurate 12-bit digital SPI interface for pressure and temperature readings. Over the sensor’s lifetime, pressure readings are accurate to a tolerance of less than 1.0 kPa, and temperature to less than 3 K.

The SMP580 has low power consumption, with a supply current of less than 5 mA. It also has a power-down mode which consumes less than 15 μA. The operating temperature range is -40 °C to +125 °C. The sensor’s measurement range is 40 kPa to 115 kPa for engine management, and 60 kPa to 165 kPa for seating systems. Customized pressure ranges and transfer functions are available upon request.

Dynamic seat adjustment

As well as helping with engine management, the SMP580 can be used in dynamic multi-contour seats. The sensors are integrated into the air chambers of the multi-contoured air cushioned seats, and ensure that the seats adapt to the anatomy of the driver and front-seat passenger. In addition to position and form-adjustable lumbar support, adjustable side bolsters on the backrest and seat area can stabilize the driver when driving on winding roads and a massage function can also be activated. Particularly on long drives, the SMP580 provides increased comfort and helps reduce driver fatigue.

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MEMS technology

Bosch is a pioneer and the global leader in the manufacture of MEMS technology. Bosch has now manufactured more than 7 billion MEMS sensors in its state-of-the-art wafer fab in Reutlingen, Germany (2015: more than 1.5 billion).


Samples of the SMP580 are scheduled to be available within the second quarter of 2017.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.