Proportional variable force solenoid control valve and transmission fluid control device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Aug 29, 2000
Issued Date -
N/A
app pub date -
Dec 30, 1996
filing date -
Nov 10, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fluid control device for an electronic transmission is provided and includes a transmission spool valve and a proportional variable force solenoid valve disposed in a common housing for controlling the pressure of a fluid supplied to a first end of the transmission spool valve in a direction opposite to the biasing force of a coil spring. The variable force solenoid valve varies fluid pressure on the first end of the spool valve in proportion to the current level of the electric signal so as to control movement of the spool valve in a manner to regulate control pressure to smooth shifting of transmission gears at a particular shifting point represented by an electrical signal supplied to the solenoid.
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