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March 31, 2011  |   Comments (1)   |   Post a comment

The Right Brakes for the Bus

SCHOOL BUS FLEET spoke with officials from three braking system manufacturers about how managing weight, drag and temperature with the right system can keep a school bus safe.

by Brittany-Marie Swanson


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Designed to consistently maintain optimum brake lining-to-drum clearance, Haldex's ABAs help reduce stopping distances and increase driver control.
<p>Designed to consistently maintain optimum brake lining-to-drum clearance, Haldex's ABAs help reduce stopping distances and increase driver control.</p>

Temperature, stability and drag must be managed properly
While Haldex has not recently introduced any new technology for the school bus industry, Corbett believes some of the company’s newer systems will eventually transition into the school bus market.

“We have a new system called TRS [trailer rollover stability system]. It’s an antilock braking system and roll stability in one unit,” he says. “I think down the road probably a roll-over type system [will be available for school buses].”

The TRS adjusts for trailer conditions during normal and antilock braking system (ABS) events. In the case of a rollover, the system will act accordingly by applying the service brakes to slow and stabilize the trailer.

“I think you’re going to see the government mandate these types of systems [for school buses],” Corbett adds.

Smartbrake systems are built for endurance, Phillips says. Each is built with materials that can withstand heat and longterm stress.

“Our newest system is called our Air-Set Smartbrake,” Phillips explains. “It provides powerful secondary braking, rapid engine warm and maintains a constant engine temperature.” The system also maintains pressure as suggested by the engine manufacturer.

Oil-tempered silicon chrome springs and stainless steel push rods are some of the materials used in Smartbrake systems to ensure durability.

“The primary braking is so important for the safety of the students,” Phillips adds. “I think that there should be more engine braking regulation to increase the safety.”

ABS signal ring failure can be prevented by Performance Friction’s “Zero Failures” brake disc, which lowers the temperature of a system engaged in braking. In doing so, it lessens the amount of thermal deformation of the ABS signal ring.

“This has been shown in the field to completely eliminate premature ABS signal ring failure,” Mohr explains. “This problem is very costly for all school bus fleets and manufacturers.”

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I need to know,,how to stop a school bus running down the road,with no brakes, April the 4th at 7;25 am my school bus lost its brakes,i pulled the emergency brake thinking that it would stop me ,but it did not,i figure it would stop a bus at 25 miles per hour,,,and it DID-NOT,, I ran off the side of road in the mud to slow me down until bus came to a stop,,i reported to bus barn the trouble.. Mr Clyde Davidson said the emergency brake Was not design to stop the bus at that speed,,,then what is,,, Will Some ONE PLEASE GIVE ME A ANSWER,, Tony Walters Neosho Mo, 1-417-312-5178 or 1-417-451- 1840 my home, by the way i was in the turning lane i have been driving a school bus for 7 years

Tony Walters    |    Apr 29, 2011 03:06 AM

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