Dynamic pressure control system with solenoid valve command current trimming
AssigneeSaturn Electronics & Engineering, Inc.
InventorsDavid L. Seid, Hamid Najmolhoda
Life of this patent
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Abstract
A dynamic pressure control system, such as a transmission pressure control system, is provided wherein one or more of electrical current command signals provided to a pressure control solenoid valve, such as a fast response variable force solenoid pressure control valve, are progressively trimmed in a manner to improve overall system pressure control performance by improving the overall commanded current response. The invention permits use of fast response pressure control solenoid valves and obtainment of in a manner to minimize overshoot and improve steady state accuracy, so as to thereby improve precision pressure control.
Claims21
A dynamic fluid pressure control system having a fluid actuated component, a pressure control solenoid valve for controlling fluid pressure to the component, and an electronic control unit providing electrical current command signals to the control solenoid valve wherein one or more of the current command signals is/are progressively trimmed in incremental manner to reduce overshoot.
A dynamic fluid pressure control system having a fluid actuated component, a pressure control solenoid valve for controlling fluid pressure to the component, and an electronic control unit providing electrical current command signals to the control solenoid wherein one or more of the current command signals is/are progressively trimmed as a series of incremental current steps.
A dynamic pressure transmission control system having a plurality of hydraulically actuated clutches, a respective pressure control solenoid valve associated with a respective clutch, and a transmission electronic control unit providing electrical current command signals to the respective control solenoids wherein one or more of the command signals provided to each control solenoid is/are provided as a series of incremental current steps.
A method of controlling a dynamic fluid pressure control system having a fluid actuated component, a pressure control solenoid valve for controlling fluid pressure to the component, and an electronic control unit providing electrical current command signals to the control solenoid valve, wherein one or more of the current command signals is/are progressively trimmed in incremental manner to reduce overshoot.
A method of controlling a dynamic pressure transmission control system having a plurality of hydraulically actuated clutches, a respective pressure control solenoid valve associated with a respective clutch, and a transmission electronic control unit providing electrical current command signals to the respective control solenoids, comprising providing one or more of the current command signals from the control unit to a respective solenoid valve wherein the one or more of the command signals is/are progressively trimmed in incremental manner to reduce overshoot.
Dependencies are inferred from the claim text.