Increased-spontaneity automatic gear box
AssigneeZF Friedrichshafen AG
InventorsChristian Popp, Friedrich Tenbrock, Hansjorg Rosi
Life of this patent
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Abstract
A method is proposed for increasing the spontaneity of an automatic transmission where the gear shifts are carried out as overlapping gears. Here an upshift from a first to a second reduction step is not completely terminated and a change over to a downshift is carried out when an abort criterion is detected.
Claims7
A method for increasing the spontaneity of an electrohydraulically controlled automatic transmission in which a gear shift is carried out by a second clutch (K2) closing while a first clutch (K1) opens, wherein during an upshift from a first (i1) to a second (i2) reduction step, the upshift is not completely terminated and a change to a downshift to the first (i1) reduction step follows when an abort criterion is detected, the abort criterion being determined from a downshift request presettable by a driver.
Dependencies are inferred from the claim text.