Variable force solenoid pressure regulator for electronic transmission controller.

摘要

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 valve assembly (10) includes a solenoid assembly (12) secured to a valve body assembly (14). The valve body assembly (14) includes a spool valve (64) having three radially extending lands (66, 68, 70) which translates within a valve body central bore (72) in response to movement of an armature assembly (38) provided in the solenoid assembly (12). Movement of the spool valve (64) generates first and second flow restriction for controllably regulating the reduction of inlet pressure to control pressure. The design provides positive damping of the spool valve (64) so as to attenuate "self-excited" oscillation thereof.