FMVSS 121 standard, a Federal Motor Vehicle Safety Standard (FMVSS), applies to trucks, buses and trailers equipped with air brake systems. This standard specifies the performance and equipment requirements for braking systems in vehicles equipped with air braking systems, including separately controlled parking brakes with prescribed holding capability, automatic brake adjusters and gauges, and emergency brakes that are automatically activated in the event of loss of air pressure.
Vehicles not covered by this standard are:
In short, the purpose of this standard is to provide safe braking performance in normal and emergency situations.
An air brake system refers to a system that uses air as a medium to transmit pressure or force from the driver control to the service brake, including the hydraulic over-air braking subsystem, but not a system that uses only compressed air or vacuum. This system assists the driver in applying muscle force to hydraulic or mechanical components.
Our company also provides air brake systems testing services within the scope of FMVSS 121 standard, with its trained and expert staff and advanced technological equipment, among the numerous test, measurement, analysis and evaluation studies it provides for businesses in various sectors.
To get an appointment, to get more detailed information or to request an evaluation, you can ask us to fill in our form and reach you.
