TROY, Mich., March 14, 2005 /PRNewswire-FirstCall via COMTEX/ -- ArvinMeritor, Inc.
(NYSE: ARM) and Meritor WABCO Vehicle Control Systems announced today their
new Premium Hydraulic Braking System for medium-duty truck and bus
applications. The package includes Meritor WABCO's Hydraulic Power Brake
(HPB) -- the next-generation of its hydraulic actuation and anti-lock braking
system (ABS), and the Meritor(R) Quadraulic(TM) hydraulic disc brake.
Combined, these two brake technologies offer unparalleled stopping and
The premium package is available immediately to North American original
equipment manufacturers' vehicles.
"The new HPB system offers significant advancements. It incorporates many
industry-first features that will positively impact motor carriers' vehicle
performance," said Denny Sandberg, president and general manager of Meritor
WABCO Vehicle Control Systems. "Together, the HPB and Quadraulic disc brakes
achieve unrivaled stopping performance, providing motor carriers' added safety
to vehicle operators."
"Our hydraulic disc brake has been proven in hundreds of thousands of
miles since it entered the market in 1997," said Pedro Ferro, vice president
and general manager of Worldwide Braking Systems and Commercial Vehicle
Emissions, ArvinMeritor. "Combining it with the advanced HPB takes this
complete system to a whole new level in stopping power for medium-duty
Together, the new HPB and Quadraulic disc brake offer numerous benefits
over current systems on the market today. One collective advantage for the
industry is shorter stopping distances. Drivers will appreciate pedal "feel"
similar to that of a passenger car, while fleets and owner-operators will
benefit from longer lining life, fewer aftermarket parts and single-source
The HPB is a braking and vehicle control system for vehicles in classes
four through seven, and buses that are equipped with hydraulic brakes. The
system provides three important functions:
* does not require the use of an external source to provide power assist
to achieve a low pedal effort as required in a conventional hydraulic braking
* brake control functions, including ABS, automatic traction control
(ATC), and electronic brake force distribution (EBD); and
* optional auto-apply electronic parking brake control.
The hydraulic energy required to actuate the brakes and control these
functions is stored in hydraulic accumulators. When the vehicle's ignition is
turned on, internal pumps are activated and fill both accumulators with
pressurized hydraulic brake fluid. When the brake pedal is applied, the small
master cylinder provides a hydraulic signal to the relay valve. Proportional
to that signal, the accumulators provide pressure to the brake calipers. When
the pedal is released, brake fluid returns to the reservoir from the brake
calipers. For ABS and ATC activation, pressure at the wheel is individually
modulated by ABS and ATC solenoid valves in the hydraulic modulator assembly.
When required, hydraulic pressure is supplied and released to the appropriate
foundation brake to achieve the desired functional effect.
"The enhanced stopping performance delivered by the new HPB is
accomplished through faster reaction time when compared to other available
hydraulic braking systems," said Alan Korn, chief engineer, Meritor WABCO
Vehicle Control Systems. "This improved reaction time is a direct result of
the stored energy in the accumulators, which are features distinct to this
HPB also has the advantage of serving as an enabling platform, allowing
for custom tailoring to meet the needs of various OEMs and fleet applications.
In addition to ATC, the system can accommodate the stability enhancement
capability which has never before been available to the medium-duty market.
It also serves as the foundation for future advanced features.
EBD (electronic brake force distribution) is another key development of
the HPB system. This function provides constant review of the vehicle's load
status and monitoring of each wheel end. Based on wheel slip observed by the
HPB system during braking, braking forces at the axles are automatically
adjusted to achieve a balanced, efficient use of the brakes. This results in
improved stopping performance and allows the vehicle to adjust for consistent
brake feel independent of the load.
The new HPB provides further advantages via its parking brake Auto-Apply
function. When a vehicle's automatic transmission is placed in Park position,
the park brake will automatically apply. The Auto-Apply will also function
when the ignition key is switched off.
"HPB represents a breakthrough in braking control for hydraulically-braked
vehicles," commented Korn. "This system delivers substantial benefits for the
operator while providing a more comfortable driving experience."
Quadraulic Hydraulic Disc Brake
With a fixed caliper opposed four piston brake, the Quadraulic disc brake
is designed to package within the 19.5 x 6.75 inch and 22.5 inch wheel sizes.
It is available in two piston sizes -- 4 x 64 mm and 4 x 70 mm.
The Quadraulic disc brake provides several performance and maintenance
benefits as a result of its unique design. The fixed caliper eliminates a
main concern often associated with rail slider or pin slider designs --
external environment factors. Reduced affects of external influences result
in longer lining life and reduced vehicle maintenance costs.
The enhanced robustness of this brake is complemented by simplified
maintenance. When lining changes are required, only the lining retention bolt
needs to be removed and the new linings can be dropped into the caliper. An
absence of caliper swing due to the fixed caliper design allows for the brake
hose to remain untouched during the lining replacement process eliminating the
possibility of hose damage.
"Since its introduction several years ago, the Quadraulic disc brake has
gained wide acceptance as a standard brake, on various vocational vehicles,
providing premium results," said Prakash Jain, business unit director, Wheel
End and Hydraulic Brakes, ArvinMeritor. "Motor carriers appreciate its easy-
to-maintain design, fewer service parts, lower maintenance costs, added
durability, and superior stopping performance."
In addition to the design advantages, the brake caliper sizes can be used
inter-changeably by utilizing the same torque plates and rotors, reducing
aftermarket parts requirements. Reducing inventory requirements even further,
the two caliper sizes available with this brake (4 x 64 mm and 4 x 70 mm), use
common brake pads (no unique inner/outer or directional pads), torque plates,
hubs/rotors, and fasteners to attach the caliper to torque plate and rotor to
WABCO, the vehicle control systems business of American Standard
Companies, is the world's leading producer of electronic braking, stability,
suspension and transmission control systems for heavy duty commercial
vehicles. WABCO products are also increasingly used in luxury cars and sport
utility vehicles (SUVs). Customers include the world's leading commercial
truck, trailer, bus and passenger car manufacturers. Founded in the US 136
years ago as Westinghouse Air Brake Company, WABCO was acquired by American
Standard in 1968. Headquartered in Brussels, Belgium, the business today
employs nearly 6700 people in 30 office and production facilities worldwide.
In 2004, WABCO contributed US$1.72 billion to American Standard's total sales
of US$9.50 billion. Website: http://www.wabco-auto.com .
Meritor WABCO(1) is a joint venture of ArvinMeritor, (NYSE: ARM) and the
WABCO Automotive Products Group of American Standard Companies Inc.
ArvinMeritor, Inc. is a premier $8 billion global supplier of a broad
range of integrated systems, modules and components to the motor vehicle
industry. The company serves light vehicle, commercial truck, trailer and
specialty original equipment manufacturers and related aftermarkets.
Headquartered in Troy, Mich., ArvinMeritor employs approximately 31,000 people
at more than 120 manufacturing facilities in 25 countries. ArvinMeritor
common stock is traded on the New York Stock Exchange under the ticker symbol
ARM. For more information, visit the company's Web site at:
(1) Meritor WABCO products are available in the United States, Mexico and
SOURCE ArvinMeritor, Inc.
Christina A. Kraning
D. Mike Pennington
all of ArvinMeritor