Green Car Congress  
Go to GCC Discussions forum About GCC Contact  RSS Subscribe Twitter headlines

« Volvo Group ordered by US Court to pay $74.3M in penalties in diesel emission case | Main | DOE to award $9M to promote consensus on future fossil energy technologies »

Print this post

Bosch improves the mechanical vacuum pump

19 July 2014

Bosch has made the EVOII mechanical vacuum pump lighter and much more efficient, putting it on a par with 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, the company claims. The unit costs up to 75% less than comparable electric pumps, and offers CO2 emissions of less than 0.4 grams per kilometer. In addition, the unit is contained within the engine compartment, so the driver hears nothing.

1-DS-20336
EVOII. Click to enlarge.

Bosch revised its tried-and-tested pump, of which it has manufactured 45 million units to date, 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 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%. As of 2013, some 40% 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 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 an optimized solution for every engine application.

The new generation of vacuum pumps 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.

July 19, 2014 in Brief | Permalink | Comments (3) | TrackBack (0)

TrackBack

TrackBack URL for this entry:
http://www.typepad.com/services/trackback/6a00d8341c4fbe53ef01a3fd35243b970b

Listed below are links to weblogs that reference Bosch improves the mechanical vacuum pump:

Comments

Another of the 1001+ ways to make current ICEs more efficient.

It is amzing to note how increased competition from more efficient HEVs, BEVs and FCEVs are pushing ICEVs and component manufacturers to improve their products.

Yes, the rate at which mechanical improvements for ICEs are being churned out which could have been had some 30 to 40 years ago, is absolutely remarkable.

I have an electric vacuum pump in my hand (a Volvo one) and it weights 1 KG. So this Bosch pump "1 KG lighter than electrics" must weight 0 grams.

BTW, I don't think my pump was designed for light weight. Mostly steel instead of aluminium. Could be lighter if designed for it.

This thing is just marketing...

Verify your Comment

Previewing your Comment

This is only a preview. Your comment has not yet been posted.

Working...
Your comment could not be posted. Error type:
Your comment has been posted. Post another comment

The letters and numbers you entered did not match the image. Please try again.

As a final step before posting your comment, enter the letters and numbers you see in the image below. This prevents automated programs from posting comments.

Having trouble reading this image? View an alternate.

Working...

Post a comment

Green Car Congress © 2014 BioAge Group, LLC. All Rights Reserved. | Home | BioAge Group