Hydraulic controller for automatic transmission

Abstract

PURPOSE: To prevent any response delay from occurring by overshooting a command value from a desired command value as much as a quantity conformed to oil temperature when this command value for a hydraulic controlling solenoid is changed, and afterward putting it back to the desired command value. CONSTITUTION: When a controlling computer changes a command value for a hydraulic controlling solenoid, for example, when a driving current value I 1 is changed to a desired value I 2 , it overshoots the command value temporarily from the desired command value I 2 and then puts it back to this value I 2 . Here a degree of this overshoot, namely, an overshoot rate or overshoot time is set according to oil temperature being detected by an oil temperature detecting means. Thus, hydraulic pressure is always controllable with proper response speed. COPYRIGHT: (C)1990,JPO&Japio

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Cited By (3)

    Publication numberPublication dateAssigneeTitle
    JP-2009190120-AAugust 27, 2009Hitachi Computer Peripherals Co Ltd, 日立コンピュータ機器株式会社研磨装置及び研磨方法
    JP-2010127148-AJune 10, 2010Toyota Motor Corp, トヨタ自動車株式会社内燃機関装置、それを搭載した車両および内燃機関装置の制御方法
    JP-2011252520-ADecember 15, 2011Hitachi Automotive Systems Ltd, 日立オートモティブシステムズ株式会社Hydraulic control device