Kick-down shift control method for five-speed automatic transmission
AssigneeHyundai Motor Company
InventorChang-Gi Yeo
Life of this patent
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Abstract
A kick-down shift control method for a five-speed automatic transmission comprises: detecting a fifth-to-third or fifth-to-second gear shifting signal; performing fifth-to-fourth gear shifting by performing a duty control on a secondary shift part if the fifth-to-third or fifth-to-second gear shifting signal is detected; determining a starting point of duty control on a release side of a primary shift part, and performing duty control on the release side of the primary shift part; and performing duty control on a coupling part of the primary shift part.
Claims3
A kick-down shift control method for a five-speed automatic transmission comprising:
- (a) detecting a fifth-to-third or fifth-to-second gear shifting signal;
- (b) performing fifth-to-fourth gear shifting by performing a duty control on a secondary shift part if the fifth-to-third or fifth-to-second gear shifting signal is detected in step (a);
- (c) determining based on a turbine rpm, Nt, and a transmission output shaft rpm, No, a starting point of duty control on a release side of a primary shift part, and performing duty control on the release side of the primary shift part;
- and
- (d) performing duty control on a coupling side of the primary shift part.
Dependencies are inferred from the claim text.