| 摘要 |
<p>An automatic directional mechanism, particularly intended for reaping machines, comprises active directional indicators instead of the known passive indicators. These are fed with a fluid supplied from a servovalve through an angle indicator for the axles; these directional indicators are provided as flow reducers. The vehicle is provided with two sensors (5a, 5b) which scan a directive line (1). A comparator (24) supplies, as an input valve of a regulator, the difference between three signals from the sensors and the direction. The comparator contains an adjustable element (26), in a pressure fluid chamber: this element (26) subdivides the chamber in two pressure spaces (28a, 28b). From said spaces, hydraulic conduits (30a, 30b) lead, through variable throttles (32a, 32b) to a return line. The adjustable throttles or stranglers are connected to the contacts by a mechanical transmission. </p> |
