As a means of controlling vehicle brake pressures for varying axle loads and/or vehicle decelerations, link-less brake deceleration sensing valves are being used in addition to fixed split point and link type load sensing proportioning valves. These valves are a means of optimizing the ratio of front-to-rear wheel retarding forces for the full range of vehicle loadings and decelerations thereby improving brake balance and vehicle stability. The object of this paper is to describe a link-less proportioning valve designed and developed for passenger cars and light trucks. Also, included are dynamic simulation and vehicle test results.
