Automatic transmission control valve body structure

Patent metadata

Field	Value
Publication number	US-2016363239-A1
Application number	US-201615249651-A
Country	US
Kind code	A1
Filing date	Aug 29, 2016
Priority date	Jan 31, 2012
Publication date	Dec 15, 2016
Grant date	—

Abstract

Structure of control valve body of automatic transmission has valve body enclosures having channels on opposing surfaces thereof; a separate plate sandwiched between the valve body enclosures for defining oil passages on both sides of the separate plate; and an orifice provided at the separate plate. The oil passages on both sides of the separate plate, which are upstream and downstream side oil passages located on upstream and downstream sides of the separate plate, communicate with each other through the orifice. Depth h, in a part facing to the orifice, of the channel corresponding to the downstream side oil passage is set to be shallower than depth of the channel corresponding to the upstream side oil passage, and the depth h of the channel in the part facing to the orifice and a diameter d of the orifice are set so as to satisfy relationship of h≦3d.

First claim

1 . A structure of a control valve body of an automatic transmission comprising:
valve body enclosures coupled together to form the control valve body, the valve body enclosures having channels on opposing surfaces thereof; a separate plate sandwiched between the valve body enclosures, the separate plate defining oil passages on both sides of the separate plate by separating the channels between the valve body enclosures; and an orifice provided at the separate plate, the oil passages on both sides of the separate plate, which are an upstream side oil passage and a downstream side oil passage respectively located on an upstream side and a downstream side of the separate plate, communicating with each other through the orifice, and a depth h, at least in a part facing to the orifice, of the channel corresponding to the downstream side oil passage being set to be shallower than a depth of the channel corresponding to the upstream side oil passage, and the depth h of the channel in the part facing to the orifice and a diameter d of the orifice being set so as to satisfy a relationship of h≦3d, and the valve body enclosure in which the channel having the depth h in the part facing to the orifice is formed being provided, in the part facing to the orifice, with a circular truncated cone-shaped protruding section.

2 . The structure of the control valve body of the automatic transmission as claimed in claim 1 , wherein:
the valve body enclosure in which the channel having the depth h in the part facing to the orifice is formed is provided with a protruding section that faces to the separate plate where the orifice is formed, and the protruding section has an opposing surface that faces to the orifice.

3 . The structure of the control valve body of the automatic transmission as claimed in claim 2 , wherein:
the opposing surface formed at the protruding section is a surface that is parallel to the separate plate where the orifice is formed.

4 . The structure of the control valve body of the automatic transmission as claimed in claim 3 , wherein:
an area of the opposing surface is greater than an area of the orifice having the diameter d.

5 . The structure of the control valve body of the automatic transmission as claimed in claim 1 , wherein:
a top portion flat surface section of the protruding section is parallel to the separate plate where the orifice is formed, and an area of the top portion flat surface section of the protruding section is smaller than an area of the orifice having the diameter d.

Assignees

• Jatco Ltd

Inventors

• Shimada Masaru
• Ishii Hideki
• Urushibata Masato
• Nonomura Akio
• Matsumoto Kenji
• Nakazawa Hideki

Classifications

• F15B13/0871

  Channels for fluid · CPC title

• F16H61/0265

  for gearshift control, e.g. control functions for performing shifting or generation of shift signals · CPC title

• F16H2061/0279

  Details of hydraulic valves, e.g. lands, ports, spools or springs · CPC title

• F16H61/0009 Primary

  Hydraulic control units for transmission control, e.g. assembly of valve plates or valve units · CPC title

• F16K47/08 Primary

  for decreasing pressure {or noise level} and having a throttling member separate from the closure member {, e.g. screens, slots, labyrinths} · CPC title