| 摘要 |
PCT No. PCT/GB91/00214 Sec. 371 Date Jul. 27, 1992 Sec. 102(e) Date Jul. 27, 1992 PCT Filed Feb. 13, 1991 PCT Pub. No. WO91/12160 PCT Pub. Date Aug. 22, 1991.A sensor in the drawbar (or fifth-wheel coupling) of a tractor-trailer road vehicle combination senses both push and pull force in a linear proportional manner and produces an electrical signal which is used to act on a continuously proportional solenoid valve in the fluid pressure supply to the trailer brakes to control the trailer braking continuously, during application, in a sense tending to reduce the force in the drawbar to zero. There may be a base pressure applied to the trailer brakes, modified positively or negatively by the pressure from the sensor signal. |
