A linear actuator (LAC) for a hydraulic electronic control unit (HECU) of a vehicle, the linear actuator being supplied with braking fluid from a reservoir 300 through a hydraulic route 1 by means of refill valves 211, 212 and outlet valves 221, 222. The actuator comprises: a first piston 11 with a first working surface S1 that builds up a first pressure p1 within a first chamber and a second piston 12 with two working surfaces: second surface S21 and third surface S22, with surface S22 building up a second pressure p2 within a second chamber which is different to the first pressure (e.g. higher pressure). The chambers may be defined by separate housings 101, 102 and communicate via the hydraulic route 1, or by a single common housing (110; fig. 2) with a travel limiter (111; fig. 2). The first surface S1 may have equal area to the second surface S21. The linear actuator is for a “one box” design of HECU and is scalable for different vehicle sizes, i.e. to output both low volume low pressure and high volume high pressure brake fluid.
Linear actuator assembly
2020-07-01
Patent
Electronic Resource
English
IPC: | B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF |
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