Automatic transmission control valve body structure

• US 9,945,496 B2
• Filed: 08/29/2016
• Issued: 04/17/2018
• Est. Priority Date: 01/31/2012
• Status: Active Grant

• Current Assignee: Jatco Limited (Nissan Motor Co., Ltd.)
• Original Assignee: Jatco Limited (Nissan Motor Co., Ltd.)
• Inventors: Shimada, Masaru, Ishii, Hideki, Urushibata, Masato, Nonomura, Akio, Matsumoto, Kenji, Nakazawa, Hideki
• Primary Examiner(s): Riegelman, Michael A
• Application Number:
  US15/249,651
• Publication Number:
  US 20160363239A1
• Time in Patent Office: 596 Days
• CPC Class Codes: B60Y 2306/09 Reducing noise
• CPC Class Codes: F15B 13/081 Laminated constructions
• CPC Class Codes: F15B 13/0871 Channels for fluid
• CPC Class Codes: F15B 21/008 Reduction of noise or vibration
• CPC Class Codes: F16H 2061/0279 Details of hydraulic valves, e.g. lands, ports, spools or springs
• CPC Class Codes: F16H 61/0009 Hydraulic control units for transmission control, e.g. assembly of valve plates or valve units
• CPC Class Codes: F16H 61/0265 for gearshift control, e.g. control functions for performing shifting or generation of shift signals
• CPC Class Codes: F16H 61/0276 Elements specially adapted for hydraulic control units, e.g. valves
• CPC Class Codes: F16K 31/06 using a magnet , e.g. diaphragm valves, cutting off by means of a liquid
• CPC Class Codes: F16K 47/08 for decreasing pressure or noise level and having a throttling member separate from the closure member , e.g. screens, slots, labyrinths

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.

Claims

1. A structure of a control valve body configured to guide working fluid, 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;

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,

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,

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 structured to guide a flow of the working fluid with respect to the orifice,

wherein the separate plate and the circular truncated cone-shaped protruding section are physically positioned to maintain a separation between the separate plate and the circular truncated cone-shaped protruding section.

2. The structure of the control valve body 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 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 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 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.