Valve arrangement with ballistic servo-controlled directional valve, has pilot piston that produces opening stroke with short duration through electric pulses generated over electronic control unit

摘要

The valve arrangement has a main stage (1) with a main piston (18) and a pilot stage (2) with a pilot piston (4). A directional valve is arranged between electronic control unit and main stage. An opening stroke with short duration is produced by the pilot piston through the electric pulses (26,28) generated over the electronic control unit, so that an interval is formed between start position and end or stop position of the pilot piston in reversal state.