| 摘要 |
<p>A variable force solenoid valve assembly (10) is provided for use in an automatic transmission controller for controllably reducing a fluid inlet pressure to a desired outlet control pressure. The invention includes a solenoid sub-assembly (12) secured to a valve body sub-assembly (14). The valve body (82) includes a spool valve (84) having three radially extending lands (90, 92, 94) which translate within a valve body central bore (97) in response to movement of an armature sub-assembly (52) provided in the solenoid sub-assembly (12). Movement of the spool valve (84) generates first and second flow restriction for controllably regulating the reducing of inlet pressure. In addition, the lands (90, 92, 94) and the central bore (97) comprise two differing diameters (91, 93) for improved outlet pressure regulation. Other various improvements in spool valve design are described including a design which enabled a reduction in the overall size of the solenoid sub-assembly. <IMAGE></p> |
