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Modulation control system and method for a hybrid transmission

  • US 9,182,034 B2
  • Filed: 03/19/2013
  • Issued: 11/10/2015
  • Est. Priority Date: 02/17/2011
  • Status: Active Grant
First Claim
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1. A hydraulic system for a hybrid electrical vehicle comprising:

  • a sump containing hydraulic fluid;

    a main regulator valve constructed and arranged in flow communication with said sump;

    a main regulator by-pass valve constructed and arranged in flow communication with said sump;

    first and second control solenoids wherein said first control solenoid is a variable bleed solenoid; and

    a control module for managing fluid flow of said hydraulic system, wherein said control module is constructed and arranged for multiplexing of said variable bleed solenoid, wherein said multiplexing is applied for said variable bleed solenoid to either hold the main regulator by-pass valve at an applied position or make the variable bleed solenoid available for main boost.

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