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Electric park brake in the center console in a Volkswagen Golf Variant. An electronic parking brake (EPB), also known as an electric parking brake or electric park brake, is an electronically controlled parking brake, whereby the driver activates the holding mechanism with a button and the brake pads are electrically applied to the rear wheels. [1]
The presence of the voltage holds the brakes off, providing a fail safe system. The 3 step "Westcode" brake uses three wires and these operate in a binary sequence to control the brake step. 10 & 11 are the brake coding to provide the 3 steps, 12 wire is emergency brake, 15 wire is EP brake negative. Positions on the brake handle are:
There were two subclasses of Class 416: Class 416/1 to an SR design on salvaged 2-NOL underframes, built between 1953 and 1956, and Class 416/2 based on a British Railways Mark 1 coach design. In the 1980s some 2 EPB units were used on the North London Line between Richmond and North Woolwich ; these units were equipped with window bars.
The early AC electric multiple units were referred to by a two-letter code. This was adapted for the DC third-rail system that was adopted by the Southern Railway, with units being given a three-letter code (sometimes two letters) prefixed by the number of cars in each unit, e.g. 4SUB for a four-car suburban unit.
To release the brakes, the engineer charges the brake pipe. This method of controlling the brakes on freight and passenger cars has remained virtually unchanged since its invention by George Westinghouse in 1868. The conventional braking system suffers from many weaknesses; one of which is in the reaction time. Because the engineer controls the ...
In manual transmission vehicles, the parking brake is engaged to help keep the vehicle stationary while parked, especially if parked on an incline. [2] [3]While automatic transmission vehicles have a "Park" gear with a parking pawl that immobilizes the transmission, it is still recommended to use the parking brake, as the pawl in the gearbox could fail due to stress or another vehicle striking ...
In 1955 BR introduced new stock on the South Tyneside line based on the Southern Region 2–EPB stock and was designated "South Tyneside 1951 Stock". They were electrically identical to the 2–EPB but the body on the motor brake cars had a much larger luggage space to accommodate prams.
In later models of Actros 2 and all Actros 3 models, the braking system was improved to EPB 2. The electronics in Actros 1 are networked via Controller Area Network (CAN) in a system known as IES (Integrated Electronics System), with the instrument cluster as the Central Gateway (CGW) or interphase. In Actros 2 and 3, the electronics are also ...