Industrial Automation Magazine India

Electric vacuum pump offering a multitude of options

Published on : Friday 18-10-2019

 

For modern gasoline engines, the electric vacuum pump always provides a sufficient vacuum level for safe and easy braking – without the permanent power waste of a mechanical pump.

Pierburg, October 17, 2019 (PresseBox) – Pierburg has been developing vacuum pumps for brake boosters for decades. With the current EVP40 model, the supplier is offering an electric option that operates on-demand and sets high standards in terms of robustness, temperature resistance and noise. It can be used in hybrids and electric vehicles as well as in vehicles with conventional drivelines. Analogous to the millions of mechanical vacuum pumps around the world, the company also produces the EVP 40 electric vacuum pump. Production facilities are the Pierburg plant in Hartha, Germany, and the Pierburg Huayu Pump Technology (PHP) joint venture in Shanghai, China.

For modern gasoline engines, the electric vacuum pump always provides a sufficient vacuum level for safe and easy braking – without the permanent power waste of a mechanical pump. By making the pump independent of the engine, the system allows further increases in efficiency, ranging from an extended start/stop mode (sailing) to an all-electric drive mode (EV mode). It requires little installation space and thus makes a significant contribution to reducing environmentally harmful CO2 emissions.

 Also in a compact premium-class electric vehicle (BEV), the pump showed excellent performances during highland testing on the Grossglockner alpine road in Austria.

In the design of the EVP 40, the manufacturer's extensive experience in the development of mechanical pumps proved to be of great value. Particular emphasis was placed on reliability and longevity, since vehicle operability must be guaranteed at all times and the braking system in particular has the highest priority. Durability and constancy were also key issues, so the pump had to go through an extensive testing program under all conditions, including temperature tests from -40 °C to +120 °C. For the necessary efficiency, a new, robust brush motor without electronics was specially developed.

 The electric vacuum pump is used in hybrids, electric vehicles and cars with conventional drivelines. The noise generated by the pump system should therefore be so low that it cannot be heard while driving. This is particularly important for electric vehicles and hybrids, which naturally run quietly. Since the pump and the integrated motor were a complete in-house development, straightforward fastening solutions could be found and expensive vibration decoupling elements avoided and hence the entire pump system exhibits excellent structure-borne noise decoupling and low airborne noise emissions. Thus, it can be mounted on body components without causing disturbing vibrations in the structure.

Last but not least, an integrated non-return valve provides added value for the customer, making it easier and cheaper to install the EVP in the vehicle. A simple installation that is independent of other components makes it possible to resolve problems otherwise caused by tight installation space.