Electrically modulated pressure regulator valve with variable fo

Details Electrically modulated pressure regulator valve with variable fo Electrically modulated pressure regulator valve with variable fo

1994-05-23

1996-05-07

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

25112908, 25112918, F15B 13044

Patent

active

055136737

ABSTRACT:
A variable force solenoid valve assembly 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 secured to a valve body sub-assembly. The valve body includes a spool valve having three radially extending lands which translate within a valve body central bore in response to movement of an armature sub-assembly provided in the solenoid sub-assembly. Movement of the spool valve generates first and second flow restriction for controllably regulating the reducing of inlet pressure. In addition, the lands and the central bore comprise two differing diameters 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.

REFERENCES:
patent: 3788597 (1974-01-01), Icioka
patent: 4250922 (1981-02-01), Will et al.
patent: 4534375 (1985-08-01), Fox
patent: 4567910 (1986-02-01), Slavin et al.
patent: 4809749 (1989-03-01), Ichihashi
patent: 4838313 (1989-06-01), Kobayashi et al.
patent: 4860792 (1989-08-01), Ichihashi et al.
patent: 4947893 (1990-08-01), Miller et al.
patent: 4971114 (1990-11-01), Ichihashi et al.
patent: 5065979 (1991-11-01), Detweiler et al.
patent: 5259414 (1993-11-01), Suzuki

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