Total air management system for all engine types

Bendix’s energy management system optimizes vehicle performance and reduces emissions.

Elyria, Ohio, May 11, 2010—Bendix Commercial Vehicle Systems LLC has developed an air management package that offers significant benefits to all engine types and OEMs. The package, consisting of the Bendix PBS Air Injection Booster, Bendix Electronic Air Control (EAC) Dryer, and Bendix Turbo-Clutch Air Compressor, enhances vehicle performance, reduces fuel consumption and improves emissions. The technology optimizes the performance of all engine types equipped with turbochargers, including those using Selective Catalytic Reduction (SCR), Advanced Exhaust Gas Recirculation (EGR), and other technologies developed to meet the federal EPA emission standards implemented in 2007 and 2010.

The PBS air injection technology, which Bendix introduced in 2009, is cited to be unique in the commercial vehicle industry today. The “smart” system is placed near the engine’s air intake system. It communicates with the Controller Area Network (CAN) and injects precise amounts of air from an auxiliary tank directly into the engine air intake system. As a result, the turbocharger spins up to its full capacity and takes over the engine’s air boosting demands.

Bendix PBS technology enables vehicles to virtually eliminate turbo lag, allowing them to reach optimum engine speed faster—and remain there longer—than those without the PBS booster, yielding fuel savings. Preliminary results of internal validation and field tests show that fleets can save up to 3 percent per vehicle in fuel with the addition of the PBS unit alone.

In addition, engines equipped with the PBS engine booster produce less diesel particulate matter (PM) and nitrogen oxides (NOx). Lower PM can lead to fewer Diesel Particulate Filter (DPF) regenerations and potentially smaller DPFs. Lower NOx levels can lead to less urea usage in SCR systems and can also assist with meeting emission levels without the use of SCR. “Our solution is designed specifically to help all vehicle manufacturers reduce emissions, while improving engine performance and energy efficiency, regardless of the type of engine they produce and the emission-reducing technology they utilize,” said Mark McCollough, Bendix product line director for air treatment.

The Bendix EAC system is a compact, electronically controlled air treatment system that integrates the air dryer, unloader valve, multi-circuit protection valve, and optionally the park brake mechatronics. Its four primary functions are air quality assurance, pressure control, air distributions defined according to customer priorities and information management. The sensors enable optimized system control, plus on-board/off-board diagnostics. EAC replaces the governor mechanism in the air brake system, using software algorithms to build up air in the most energy-efficient manner. A commercial vehicle equipped with EAC technology can realize up to 2 percent in fuel savings.

The pneumatically operated, single-cylinder Bendix Turbo-Clutch Air Compressor works in tandem with PBS air injection and EAC, so that the compressor disengages during the portion of the duty cycle when no air is demanded. This highly reduces power consumption from the engine and increases fuel efficiency. As a result of the reduced overall cycling, the life cycle of the compressor significantly increases, and normal wear and tear is dramatically reduced. By itself, the Turbo-Clutch Air Compressor can bring up to 3 percent in fuel savings.

Bendix PBS air injection provides the greatest fuel efficiency for vehicles used in pickup and delivery. To complement PBS air injection, the Bendix Turbo-Clutch Air Compressor provides the most fuel savings for line-haul vehicle applications, where air-brake demands are lower. “Bendix EAC further complements PBS air injection and the Turbo-Clutch Air Compressor by building or purging air at the most energy-efficient times, such as when there is low engine load as occurs during deceleration,” McCollough said. “Vehicles can reach 8 percent fuel savings when the three air management technologies are in place, working together.”

“The Bendix air management package is applicable for all engine types and OEMs,” Mance said. “Bendix is committed to setting the industry standard for environmentally friendly components that optimize vehicle performance, energy efficiency, and emission reduction.”

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