An air brake relay valve includes an air guide unit having a movable set, a drive unit having a motor and a worm shaft, and a cam unit having a transmission member and a driven member. During a brake action, the motor rotates the worm shaft to rotate the transmission member so as to push the driven member downward to thereby move the movable set to a communicating position where a first valve opening and a second valve opening fluidly communicate with each other. When the brake action is released, the motor rotates reversely so that the driven member is moved upward and that the movable set moves, without being applied with additional force, to a non-communicating position where the first and second valve openings do not fluidly communicate.

Applied Country	Category	專利狀態	證書號	專利權期間	研究成果公告日期
TW	Chassis steering technology	獲證	CN109955842B	2020/06/16~2037/12/24
DE	Chassis steering technology	獲證	CN109955842B	2020/06/16~2037/12/24
US	Chassis steering technology	獲證	CN109955842B	2020/06/16~2037/12/24
CN	Intelligence and safety	獲證	CN109955842B	2020/06/16~2037/12/24