| 摘要 |
<p>A jackknife resistant device comprises a piston (14) cylinder (12) arrangement and a pressure/flow rate sensitive restrictor means (20) operable to control flow to or from the variable volume in a piston/cylinder combination. The restrictor means operates so that, when the movement of the piston relative to the cylinder is within normal limits encountered during normal driving conditions, the restrictor is open, but when the extent or rate of movement exceeds a preset limit, indicative of a potential jackknife situation, the restrictor closes under the influence of the flow rate and/or pressure, to make the coupling rigid.</p> |
