Electronically controlled brake system for trailer tractors

摘要

An electronically controlled brake system for trailer tractors. The system having a device for braking the tractor and trailer, and for steer-by-braking the tractor only, tractor brakes, and further devices for braking the trailer only. The further devices include a normally-ON valve allowing simultaneous braking of the tractor and trailer. The valve is switched to OFF when the steer-by-braking function is activated.

主权项

1. An electronically controlled brake system for trailer tractors; the system comprising:
a compressed fluid source configured to produce and to distribute compressed fluid; a braking device for the tractor and trailer, wherein the braking device is configured to facilitate steer-by-braking of the tractor only; a compressed-fluid modulator configured to activate tractor brakes; a trailer braking device configured to brake the trailer only, wherein the trailer braking device comprises a normally-ON electric trailer braking valve normally facilitating simultaneous braking of the tractor and trailer; a pedal system having a left pedal and a right pedal, wherein the pedal system is configured to output first electrical signals indicative of depression of the left pedal and of the right pedal; and an electronic central control unit electrically coupled to the pedal system, to the compressed-fluid modulator, and to the electric trailer braking valve, wherein the electronic central control unit is configured to determine whether steer-by-braking is active based on the first electrical signals, and to output second electrical signals to the electric trailer braking valve while steer-by-braking is active, wherein the second signals are indicative of instructions to switch the electric trailer braking valve to OFF.