US 11,999,328 B2
Air parking brake electric control valve
Fu-Hsien Sun, Changhua County (TW); Chien-An Chen, Changhua County (TW); and Ming-Jyun Lin, Changhua County (TW)
Assigned to Automotive Research & Testing Center, (TW)
Filed by Automotive Research & Testing Center, Changhua County (TW)
Filed on Dec. 15, 2021, as Appl. No. 17/551,656.
Prior Publication US 2023/0182709 A1, Jun. 15, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B60T 15/04 (2006.01); B60T 13/38 (2006.01); B60T 13/68 (2006.01)
CPC B60T 15/041 (2013.01) [B60T 13/385 (2013.01); B60T 13/683 (2013.01)] 3 Claims
OG exemplary drawing
 
1. An air parking brake electric control valve comprising:
an air valve unit including a main valve body, an auxiliary valve body, a valve core and a first electromagnetic assembly, said main valve body having a first passage, a second passage that transversely intersects said first passage, a third passage that transversely intersects said first passage, and a fourth passage that transversely intersects said first passage, said first passage having an open end and a closed end, said second passage being disposed adjacent to said closed end of said first passage, and having an end that communicates with said first passage, and an opposite end that forms an inlet, said third passage being disposed adjacent to said open end of said first passage, and having an end that communicates with said first passage, and an opposite end that forms a vent hole, said fourth passage having an end that communicates with a portion of said first passage between said second passage and said third passage, and an opposite end that forms an outlet, said auxiliary valve body being connected to said main valve body, and defining a driving space therein that communicates with said open end of said first passage, said valve core being rod-shaped, and having an air guide section that is disposed in said first passage, and a driving section that is disposed in said driving space, said first electromagnetic assembly being disposed on said auxiliary valve body, said valve core being driven by said first electromagnetic assembly to move between a first action position and a second action position; and
a self-lock unit disposed on said auxiliary valve body, and including a second electromagnetic assembly, said second electromagnetic assembly including a coil, a movable column that is driven by said coil, and a self-lock spring that abuts against said movable column, said movable column of said second electromagnetic assembly being operable to move between a release position and a lock position.