| 摘要 |
<p>The invention relates to a brake-by-wire system (210). There is a need for a trailer brake control circuit (210) for a by-wire brake system. A brake control circuit (210) for a trailer service brake (212) and a trailer park brake (213) in a by-wire brake system includes a supply of pressurized air (214), an air vent (216), a pair of solenoid operated proportional valves (218,220) for controlling communication between the supply of pressurized air (214), the air vent (216) and the trailer brakes (212,213), and a pair of solenoid operated shutoff valves (222,224), each controlling communication between the trailer brakes (212,213) and a corresponding one of the proportional valves (218,220).</p> |
