Oil passage structure in transmission casing of an automatic tra

Details Oil passage structure in transmission casing of an automatic tra Oil passage structure in transmission casing of an automatic tra

1989-07-18

1991-05-14

Chambers, A. Michael

Fluid handling

Systems

With pump

184 612, 184 628, F01M 1100

Patent

active

050147412

ABSTRACT:
An oil passage structure in a transmission casing of an automotive automatic transmission, comprises, at an outer peripheral abutting surface between the transmission casing and the oil pump cover, an opening defined in the transmission casing which is exposed to the abutting surface of the transmission casing and is communicated with the inlet port of the valve assembly provided in the bottom section of the transmission through a single vertical oil channel formed in the transmission casing by machining to provide the shortest distance between the inlet port of the valve assembly and the opening. The oil passage structure also comprises an oil groove which is integrally formed on the abutting surface by die-casting and includes a point connecting the outlet port of the oil pump through an oil passage defined in the oil pump cover, to intercommunicate the opening and the connecting point.

REFERENCES:
patent: 3618711 (1971-11-01), Vollmer
patent: 3618712 (1971-11-01), Casey

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