CCBII (Computer Controlled Brake)

Electronic Brake Valve (EBV)
The ergonomic EBV is the interface between the brake system and the locomotive engineer, and features either a desktop or AAR-stand installation. An easy-to-read digital display provides real-time information on the equalizing reservoir target pressure and allows the locomotive engineer to exercise precise brake control. As a fail-safe design, the EBV permits direct-acting emergency venting of the brake pipe.

Our next generation EBV, also available in desktop or bulkhead versions, has fewer parts, non-contacting handle sensors and an IP55 rating that delivers improved reliability as well as a 20-year service life.

Integrated Processor Module (IPM)
The IPM manages the electronic interfaces between the brake system elements and the engineer's display. It communicates with the locomotive on-board computer and interfaces with electrical trainlines. The IPM also communicates with a portable test unit (PTU) for troubleshooting and system diagnostic tests. With the appropriate hardware and software conversions, the IPM serves as the computer in a Locotrol Distributed Power application.

Electro-Pneumatic Control Unit (EPCU)
The EPCU manages the pneumatic interfaces between the locomotive brake system and the consist. It controls the locomotive's brake cylinders, brake pipe, independent application and release pipe as well as the actuating pipe. Knorr's patented Analog Converters provide highly accurate, stable control of equalizing reservoirs, brake cylinder pilots, as well as independent application and release pipe pressures. The EPCU’s redundant pneumatic backup system provides backup for partial loss of computer control in the lead locomotive, or functions in the trail mode when the system is unpowered.

Networked Modules (LRUs)
The CCBII design applies Echelon LonWorks network technology to interconnect electro-pneumatic modules. These modules, also referred to as line-replaceable units (LRUs), are in a constant state of communication with one another, collectively providing faster response time, simplified troubleshooting and easier train setup. The LRU systems approach minimizes spare parts inventory and reduces operating and maintenance costs, while increasing train availability.