Hydraulic control system for automatic gear box of motor vehicle, has electromagnetic device arranged at end of one of housings by leak-flow through, where unique electromagnetic device communicates with distribution channels

摘要

The system (1) has slides (10a, 10b) and cylindrical housings (9a, 9b) formed with annular grooves (18-27) based on the position of the slides to communicate a pipe (5) with a flow absorber (4) and a gear box receiver (8). Distribution pipes (7, 7a, 7b) connect ends of each housing. A variable controlling pressure is determined by fluid supply rate with pressure higher than return pressure emerging in the distribution channel, and by a leak-flow through an electromagnetic device (11) arranged at the end of the one of the two housings (9a, 9b) of slide and communicating with the channels.