Mobility Solutions

Cheaper, lighter, more efficient Bosch improves the mechanical vacuum pump down to the smallest detail

  • The price and reliability of a mechanical pump combined with the efficiency of an electric one
  • “We revisited an established product and refined it down to the smallest detail”
  • Modular construction makes it possible to tailor the pump to modern gasoline and diesel engines
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  • July 08, 2014
  • Mobility Solutions
  • Press releases

press release

With its EVOII mechanical vacuum pump, Bosch has shown that conventional components still have considerable development potential. The company has made the economical mechanical pump lighter and much more efficient, putting it on a par with supposedly more efficient yet far more expensive electric vacuum pumps. The Bosch EVOII offers the best value for money on the market and reliably provides the vacuum for the brake booster. Costing up to 75 percent less than comparable electric pumps, this new generation is the ideal solution for modern gasoline and diesel engines. With CO2 emissions of less than 0.4 grams per kilometer, this pump performs just as well as its electric competitors. In addition, the extremely robust unit is contained within the engine compartment, so the driver hears nothing.

To realize this achievement, Bosch took its tried-and-tested pump, of which it has manufactured 45 million units to date, and revised it from the ground up. This new generation is 300 grams lighter than other mechanical vacuum pumps, and more than a kilogram lighter than electric ones. The difference is the thermoplastic rotor: its stable blades can create the necessary vacuum, while overall the unit weighs very little.

The functional principle of the mechanical vacuum pump has been firmly established for diesel engines for a long time. In recent years, there has also been a growing need for vacuum in modern gasoline engines due to the spread of gasoline direct injection, which in combination with engine downsizing reduces fuel consumption by up to 15 percent. As of 2013, some 40 percent of all new cars in Europe had direct fuel injection. Modern direct fuel injection systems need an additional pump, since the vacuum can no longer be controlled by the throttle valve.

The EVOII vacuum pump shows that even as Bosch works on large-scale trends, the company also places value on improving individual components. “With the EVOII, we reexamined an established product and refined every detail,” says Alessandro Fauda, head of development for the mechanical vacuum pump. As a consequence, the product is designed in such a way that it provides the necessary amount of vacuum while still creating the least amount of friction of any product on the market. The efficient design of housing and rotating elements is the result of intensive simulations and calculations. By changing certain parameters, Bosch is able to find the best solution for every engine application.

Another feature of the new generation of vacuum pumps is that they can be tailored to each customer and engine application. Depending on customer requirements, the Bosch vacuum pump can be driven by the crank- or camshaft, a gear or a chain. It can also be integrated with an oil or a fuel pump.

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 www.bosch.com and www.bosch-press.com, http://twitter.com/BoschPresse.

PI8605 - July 08, 2014

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