| 摘要 |
PCT No. PCT/EP87/00219 Sec. 371 Date Oct. 26, 1988 Sec. 102(e) Date Oct. 26, 1988 PCT Filed Apr. 23, 1987 PCT Pub. No. WO87/06669 PCT Pub. Date Nov. 5, 1987.Electro-hydraulic control for an automatic transmission (1) is disclosed with two primary shafts (11, 12), whereby the first shaft (11) is connected with a turbine (21) of a hydrodynamic unit (2) and the second shaft (12) is directly connected to the driving shaft (31) of a driving motor (3) and the driving output is directed depending on speed, individually or by power split, to the for instance stepped-down planetary gear with a selecting slide (4) at least for the neutral position (N), as well as the forward drive- (D) and the reverse drive position (R) and an electronic control device (5) with solenoid valves (6), kept in zero position by spring force, for a pressure-medium source (7), pressure- and switch valves and dampers for the actuation of gear shift couplings and brakes (A-E), whereby between a solenoid valve (6) and the gear shift couplings for the highest speed (E) as well as the reverse drive (B) an emergency valve (8/9) is interposed. This way, in case of current failure an uninterrupted drive over the coupling (E) via mechanical transmission is possible and a forward- and reverse drive and a start is possible in both these directions over the reverse speed coupling (B). |
