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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
First Claim
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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, andthe 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.

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