charging systems
charging systems
Compressors
ANATOMY OF A LEGEND
ANATOMY OF A LEGEND
Bendix
Engineered to perform better, so your eet performs better.
®
Compressors
For generations, the Bendix name has meant quality, reliability and durability
when it comes to your vehicle’s air charging system.
charging systems
COMPRESSORS
The Bendix® Compressor Air Power Series
Rigorous standards.
Unparalleled know-how.
Innovation to suit every
generation of vehicles.
That’s why companies across
the globe stake their eets
on Bendix
®
Compressors.
BA-921
®
Selling compressors for commercial vehicles is nothing like
selling shoes or bubble gum. Success can’t be bought with
big marketing campaigns or hype . . . what matters most is
real-world performance, reliability and value. Maintaining
this philosophy – and delivering on this commitment – has
made an industry leader in air system technology and safety
technology for generations.
When you consider that more Nor th American OE
manufacturers and eets specify Bendix air braking products
and control systems than any other, you can be certain we’re
offering unparalleled products and service. And as a key
member of the Knorr-Bremse Group, we’re the preferred
worldwide supplier of commercial vehicle braking systems,
active safety technology and energy management solutions.
Best Overall Value On The Market
Bendix compressors offer QS-9000 certied quality,
Six Sigma-driven manufacturing, the most knowledgeable
technical sales and support teams available, and the longest
average life you can buy.
We have a complete line of new and remanufactured
compressors for heavy vehicle engines, as well as most
industrial applications. To guarantee performance, every unit
is individually tested to our exacting standards, and backed
by an impressive warranty.
Experience Counts –
Count on Bendix
With highly sophisticated Research and Development
capabilities and up-to-the-minute expertise from around
the globe, Bendix is continuing its legacy of providing reliable,
high performing, durable products for your eet’s air
charging systems.
BA-922
®
Built for better performance
today and tomorrow.
BA-921® Compressor
Lighter in weight and more compact to address OE t
constraints, this dynamic single cylinder compressor utilizes reed
valve technology for improved operating efciency. It is available
for a wide range of build platforms, including specialty vocational
applications. It features:
• Turbo boost capability of 43.5 psig
• High thru-drive capacity – up to 125 foot pounds
• Improved air quality along with faster system recovery
BA-922® Compressor
When you need maximum air delivery, the BA-922 Big Twin
Air Compressor meets the needs of the most demanding
commercial and specialty vocational applications. This high air
output compressor supplies 32 cfm (at 2100 RPM), and employs
many of the same exceptional design elements, including the
robust reed valve technology, as its single cylinder cousin,
the Bendix BA-921. The powerful BA-922 Compressor
also incorporates:
• Standard Nor th American unloader valving –
eliminating the special valve requirements normally
associated with two-cylinder high output compressor
• A “drive train saver” crankshaft design to help prevent damage
to the gear train or auxiliary components
• High thru-drive capacity up to 125 foot pounds
• Improved air quality along with faster system recovery
• Universal SAE BB mounting option
ANATOMY OF A LEGEND
Less oil passage means cleaner air lines, and less downtime for service.
That adds up to a more efcient eet, and a stronger bottom line.
Compared to a leading competitor, the Bendix® BA-921® and BA-922® Compressors deliver more air at lower discharge temperatures,
and – thanks to their optimized piston/ring design – there is less oil passage. So there’s less carbon build-up in the compressor, and less
contamination, which extends the life of the whole air charging system.
Piston comparison
Our larger, more robust piston design for better seal and wear
resistance. Extra ring means less oil passing, better compression.
Bendix BA-921
- 92mm diameter
- Full geometry
- Top compression ring for oil
passing control
Competitor
- 85mm diameter
- No top compression ring
to help reduce oil passing
Cylinder Head comparison
Bendix Cylinder Head/Cooling & Valve Plate
2 Discharge
valve/retainers
Bendix head/plate
combination provides a
highly turbulent, highly
effective three tier heat
exchange design to
minimize discharge air
temperatures.
Crankshaft
Wider journal width and bearing surfaces for better load
distribution and wear resistance. Our crankshaft offers
signicantly more load-carrying capability.
Bendix BA-921
- Larger journal width front
and rear
- Oil holes 90 degrees from top
and bottom dead center
Competitor Cylinder Head with Integrated Cooling Valve Plate
Competitor design does not
reduce discharge air temperature
as effectively.
Competitor
- Oil holes at top and bottom
dead center
- Smaller journal width
- Larger counterbalance
Discharge valve/retainer
Steel valve plate
Bendix valve plate cooling close to cylinder, and hottest air,
to maximize heat reduction effectiveness.
Unloader Mechanism
Bendix unloader mechanism is serviceable.
Serviceable ESS piston
Serviceable ESS piston cover
on cylinder head
Bendix
Cooling ns
Coolant path
Competitor
- Bottom of cooling/valve plate assembly
- Non-serviceable unloader leaf slider, plus more susceptible
to carbon build-up
charging systems
COMPRESSORS
ANATOMY OF A LEGEND
Engineering Statistics
Bendix® is signicantly better in oil passage due to optimized piston/ring design, and generally lower discharge temperatures.
This results in less carbon build-up and contamination downstream and less system maintenance in general. The choice is clear.
Single Cylinder Twin Cylinder
Compressor Competitor Compressor Competitor
Piston Size
Swept Air Displacement
Calculated Air Delivery
Oil Passage (per hour)
92mm 86mm 92mm 86mm
(@ 1,250 rpm)
cc
Discharge Air
Temperature
Temperature ˚F
1,800 RPM
3,000 RPM
Bendix BA-921® Leading Bendix BA-922® Leading
360cc 318cc 720cc 636cc
15.8cfm 14.0cfm 31.6cfm 27.9cfm
Bendix Leading Bendix Leading
Competitor Competitor
0.8
0.6
0.4
0.2
380
360
340
320
300
280
260
240
0.8
0
0.2
Bendix Leading Bendix Leading
Competitor Competitor
311˚
260˚
345˚
266˚
0.25
302˚
250˚
0.8
298˚
372˚
For over 80 years Bendix has been the industry leader in the design and manufacturing of compressors and
components of air braking control systems for on-highway applications. No other manufacturer can offer
you “genuine Bendix” quality, power and performance for your vehicles. Put us on your team!
For more information, talk to your Bendix Account Manager, call 1-800-AIR-BRAKE (1-800-247-2725),
or visit www.bendix.com today.
Bendix Commercial Vehicle Systems LLC • 901 Cleveland Street • Elyria, Ohio 44035 • www.bendix.com • 1-800-247-2725
BW2878 ©2011 Bendix Commercial Vehicle Systems LLC, a member of Knorr-Bremse Group • 12/11 • All Rights Reserved
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