Title:
UPGRADING AUTOMATIC TRANSMISSIONS
Document Type and Number:
WIPO Patent Application WO2003040595
Kind Code:
A3
Abstract:
The pressure sensitive valve is designed to relieve oil pressure accumulation in the 3/4 clutch assembly on a Hydramatic 4L60/E automatic transmission. Pressure relief is accomplished by a compression spring (37) and a valve member (28), located in the valve housing (27) . When unwanted pressure has accumulated in the 3/4 clutch circuit (whilst the transmission is in 1 or 2 gear) the predetermined tension of the compression spring holds the valve member off its seat (29), thus allowing unwanted oil pressure to flow through the interior space of the housing (33) and exhaust through the orifice (35). When full oil pressure is applied in the 3/4 clutch circuit the compression spring (37) collapses and allows the valve member (28) to seal on the valve seat (29) of the housing. Thus blocking the fluid flow and allowing full oil pressure to apply the 3/4 clutch assembly.
Inventors:
BORG JOSEPH (AU)
Application Number:
PCT/AU2002/000938
Publication Date:
June 26, 2003
Filing Date:
July 12, 2002
Export Citation:
Assignee:
BORG JOSEPH (AU)
International Classes:
F16H61/02; F16K17/30; F16H61/12; (IPC1-7): F16H61/18; F16H61/00; F16K17/30; F16K17/34
Foreign References:
| US4830046A | 1989-05-16 | |||
| US5105850A | 1992-04-21 | |||
| AU2247477A | 1978-08-24 | |||
| US5743823A | 1998-04-28 |
Other References:
DATABASE WPI Derwent World Patents Index; Class Q66, AN 2002-094008/13
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