A Dual-Mode Height Sensing Brake Proportioning Valve

This paper describes the performance, design and operation of a new selective brake proportioning valve developed by Kelsey-Hayes Co. It combines positive braking performance with high product reliability to achieve significant quality improvements in the brake systems of vehicles with large differences between empty and loaded weights. This valve can be used as a tool by the brake system engineer to approximate the ideal brake balance for all ranges of vehicle loading. Introduced on 1982 Chevrolet C30 and K30 series trucks, this new product offers basic advantages over variable split load sensing proportioning valves used in the past.