Control apparatus for an automotive fluid pressure circuit

摘要

In a control apparatus for a fluid pressure circuit in motor vehicles a first fluid pressure detector (PSW1) detects a fluid pressure in an accumulator (15), and switches between two states when the detected fluid pressure reaches a firstfluid pressure setting P1; a second fluid pressure detector (PSW2) switches between two states when the detected fluid pressure reaches a second fluid pressure setting P2 that is lower than the first fluid pressure setting P1; a timer counts the period during which the fluid pressure detected by the second fluid pressure detector is less than the second fluid pressure setting P2; and a trouble detector evaluates whether there is a problem in the first or second fluid pressure detector by determining whether the first and second fluid pressure detection means are indicating different states, and whether the time detected by the timer is also equal to or greater than a predetermined value. <IMAGE>