German automotive parts supplier ZF has signed a deal with a global manufacturer that includes planned volume production of brake-by-wire technology to equip nearly 5 million vehicles with electro-mechanical braking (EMB) over the length of the contract.
Featuring the electro-mechanical brake and by-wire technology on the rear brakes, the project will also include ZF’s integrated brake control (IBC) and traditional front calipers, creating a hybrid braking system of by-wire and hydraulics that offers the manufacturer increased flexibility.
The agreement will also provide steering technology with ZF’s Electric Recirculating Ball Steering Gear (RBSG). EMB, as a key component of the brake-by-wire technology, lays the foundation for the software-defined vehicle that will lead to new functions and features, such as autonomous braking and steering in a crash, according to the company.
ZF’s EMB is at the center of its “dry brake” system, which does not require brake fluid. Brake pressure is therefore not generated by the pressure of fluids in the hydraulic system, but by electric motors. Braking signals from the pedal to the electric motor are also transmitted electronically.
The EMB works with the IBC, a non-vacuum, fully integrated electro-hydraulic system providing high brake performance for automatic emergency braking, full energy recuperation and redundant fallback options up to full automated driving for passenger car and light truck segments.
The hybrid system is created by an electric system on the rear axle and hydraulics at the front, featuring ZF’s Colette-type caliper, which is available for passenger car and light commercial vehicles in single and twin piston designs.
The RBSG is a 48 V electrically powered gear designed to replace current hydraulic applications as an integrated unit that reduces vehicle assembly costs. It allows for ADAS features up to Level 2 as well as improved steering and performance.
“Our goal when combining our steering, braking, dampers and actuators as well as corresponding software businesses into a single division was to create a comprehensive Chassis Solutions product and system offering,” said Peter Holdmann, Board of Management member at ZF and head of Division Chassis Solutions.
Source: ZF
