Speed ratio control method and device

The invention provides a speed ratio control method and device, and the method comprises the steps: obtaining a braking grade when the input rotating speed of a gearbox at a first moment is a first rotating speed; the braking grade comprises an input rotating speed change rate and a second rotating...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SUN XIAN'AN, YANG ZHIXIONG, LIU YAOFENG
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention provides a speed ratio control method and device, and the method comprises the steps: obtaining a braking grade when the input rotating speed of a gearbox at a first moment is a first rotating speed; the braking grade comprises an input rotating speed change rate and a second rotating speed; controlling the input rotating speed to change at the input rotating speed change rate until the input rotating speed at the second moment is equal to the second rotating speed, so that the actual speed ratio is matched with the target speed ratio; the target speed ratio is determined according to the second rotating speed; the actual speed ratio is determined according to the input rotating speed. Compared with the prior art, the input rotating speed change rate is reduced, the moving speed of an oil cylinder of the continuously variable transmission is reduced, the flow consumed by the oil cylinder is reduced, meanwhile, the actual value of the input rotating speed is larger than the target value, and the