Pierburg Electrical Vacuum Pumps

For decades now, Pierburg GmbH has been developing vacuum pumps for brake boosters, and the new EVP 40 operates on demand, is rugged and extremely durable, with a life-span of up to 1200 hours. The pump is in a high volume-production for a leading global OEM.

The development of a new product for the auto industry poses enormous challenges for engineers and developers on each occasion. From the initial concept, product development is like a journey through various topic areas and stations. These include, to name but a few, issues of design and configuration, simulations, the analysis of temperature measurements as well as accelerated ageing tests.

Emphatic downsizing has been a dominant trend in engine design over the past decade, with smaller engines, in particular, being turbocharged. However, under zero-load conditions, these modern gasoline engines cannot ensure the vacuum in the intake pipe necessary for the brake booster. And the demand for more efficiency and progressing electrification entails the need to come up with completely new systems for the auxiliary units. Vacuum brake boosters are cost effective, but they do need an efficient, engine-independent source for the necessary vacuum to be called up at any time. It is precisely with this in mind that Pierburg has developed the EVP (Electric Vacuum Pump).

Life-span, endurance strength, efficiency

Pierburg's extensive experience in developing mechanical pumps proved to be of vast value in the design of the EVP. During the development phase, special emphasis was placed on reliability and life-span. After all, vehicle performance must be assured at all times, and the brake system, in particular, assumes top priority from in this respect. Other important aspects were endurance strength and performance reproducibility. The pump was required to undergo an extensive testing regime, including temperatures ranging from -40 °C to +120 °C. A specifically developed non-electronic robust brush motor was designed to provide the necessary efficiency.

Noise, Vibration and Harshness (NVH)

The electric vacuum pump is just as much at home in hybrid and electric vehicles as in vehicles with conventional drivelines. The objective was for the pump system to be barely audible when driving, especially important on electric and hybrid vehicles which are, by their very nature, quiet running. Since pump and integrated motor were specifically developed inhouse for this project, Pierburg engineers were able to devise cost-effective mounting solutions with no need for costly vibration insulation. In fact, the entire pump system has outstanding structure-borne noise insulation and low air-borne noise emissions. It can thus be mounted on body parts without causing distracting vibrations in the vehicle's structure.

An integrated check valve delivers additional customer value and makes it easier and less costly for the EVP to be installed in the vehicle. Straightforward mounting, independent of the other assemblies, allows installation-space conflicts to be resolved.

Background info: electric vacuum pumps

Though less costly, mechanical vacuum pumps directly connected to the IC engine have the drawback that they are continuously running along with the vehicle, irrespective of whether this is necessary and, depending on the operating mode, even at high RPM. Conversely, electric vacuum pumps switch off when the brakes are not applied. In this way, fuel consumption and emissions are curbed. The fact that there is no mechanical pump also means less work for the engine lubrication system, as no extra oil is needed for lubricating the vacuum pump. This means the oil pump can have more compact dimensions which, in turn, boosts engine efficiency. Another asset: the oil pressure rises at the spot at which a mechanical vacuum pump would normally be mounted, which is the cylinder head in most cases.

On hybrid vehicles, electric vacuum pumps allow all-electric motion with the IC engine switched off. At the same time, the power braking function is fully available. This type of pump also allows the vehicle to run in coasting mode, with the engine switched off and disconnected for additional fuel savings thanks to reduced drive train resistance (extended start-stop operation)

Pierburg GmbH

Pierburg GmbH

Alfred-Pierburg-Straße 1
Neuss Neuss GermanyPhone: +49 2131 520-2463Fax: +49 2131 520-542E-MailRoute
Use of cookies and data protection

Rheinmetall Automotive uses cookies saved to your device in order to optimize and continuously improve its websites, as well as for statistical purposes. Further information on our use of cookies can be found here, together with our publication details and data protection notice.

By clicking on “OK” you confirm that you have taken note of the information on cookies, the data protection declaration and the publication details. You can also change your cookie settings for this website at any time.

Privacy settings

We place great importance on transparent information relating to all aspects of data protection. Our website contains detailed information on the settings you can select and what effect these settings have. You can change your selected settings at any time. Regardless of the selection you choose, we will not draw any conclusions regarding you as a person (except where you have explicitly entered your details). For information on deleting the cookies, please see the help function in your browser. You can find out more in the data protection declaration.

Change your privacy settings by clicking on the corresponding buttons

Necessary

Cookies essential for the system ensure that the website works correctly. Without these cookies, malfunctions or error messages may occur.

This website will:

  • Store cookies required by the system
  • Store the settings you make on this website

This site will never do the following without your agreement:

  • Store your settings, such as the language selection or cookie banner, so that you do not have to repeat them in the future.
  • Evaluate visits anonymously and draw conclusions to help us to optimize our website.
  • Draw conclusions regarding you as a person (except where you have explicitly entered your details, e.g. in contact forms)

Convenience

These cookies make the website easier to use and save settings, for example, so that you do not have to repeat them every time you visit the site.

This website will:

  • Store cookies required by the system
  • Store your settings, such as the language selection or cookie banner, so that you do not have to repeat them in the future.

This site will never do the following without your agreement:

  • Evaluate visits anonymously and draw conclusions to help us to optimize our website.
  • Draw conclusions regarding you as a person (except where you have explicitly entered your details, e.g. in contact forms)

Statistics

Statistics cookies enable us to evaluate the usage behaviour on the website anonymously – without enabling any conclusions to be drawn about you as a person. This enables us to measure the performance of the website and to improve it continuously to offer a better user experience.

This website will:

  • Store cookies required by the system
  • Draw conclusions regarding you as a person (except where you have explicitly entered your details, e.g. in contact forms)
  • Evaluate visits anonymously and draw conclusions to help us to optimize our website.

This site will never do the following without your agreement:

  • Draw conclusions regarding you as a person (except where you have explicitly entered your details, e.g. in contact forms)

Of course, we will always respect the do-not-track (DNT) setting in your browser. In this case, no tracking cookies are set and no tracking functions are loaded.