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US 8,012,060 B2Granted
Speed change control system for automatic transmission
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsHiroyuki Shibata, Tooru Matsubara, Atsushi Tabata
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AssigneeToyota Jidosha Kabushiki Kaisha
InventorsHiroyuki Shibata, Tooru Matsubara, Atsushi Tabata
Estimating the term…
To provide a speed change control system capable of carrying out an entire speed change operation of a transmission in which speed change operation of a first and a second speed change units are carried out simultaneously in directions opposite to each other, without deteriorating shocks even in case a speed change operation of one of the speed change units is restricted. For this purpose, there is provided a speed change control system for an automatic transmission, which has a first and a second speed change units, and in which a speed change ratio of the second speed change unit is changed in a direction opposite to a changing direction of a speed change ratio of the first speed change unit when changing the speed change ratio of the first speed change unit, comprising: a speed changing rate setting means for setting a speed changing rate of the second speed change unit in accordance with a progression of a speed change operation of the first speed change unit.
A speed change control system for an automatic transmission, which has a first speed change unit and a second speed change unit, and in which a total speed change ratio thereof is varied by changing speed change ratios of the first and the second speed change units in directions opposite to each other, comprising:
A speed change control system for an automatic transmission, which has a first speed change unit having a rotary member in which a revolution frequency thereof is changed in consequence of a speed change operation and a second speed change unit, and in which a total speed change ratio thereof is varied by changing speed change ratios of the first and the second speed change units in directions opposite to each other, comprising:
A speed change control method for an automatic transmission, which has a first speed change unit and a second speed change unit, and in which a total speed change ratio thereof is varied by changing speed change ratios of the first and the second speed change units in directions opposite to each other, comprising:
A speed change control method for an automatic transmission, which has a first speed change unit having a rotary member in which a revolution frequency thereof is changed in consequence of a speed change operation and a second speed change unit, and in which a total speed change ratio thereof is varied by changing speed change ratios of the first and the second speed change units in directions opposite to each other, comprising:
A speed change control system for an automatic transmission, which has a first speed change unit and a second speed change unit, and in which a total speed change ratio thereof is varied by changing speed change ratios of the first and the second speed change units in directions opposite to each other, comprising:
A speed change control system for an automatic transmission, which has a first speed change unit having a rotary member in which a revolution frequency thereof is changed in consequence of a speed change operation and a second speed change unit, and in which a total speed change ratio thereof is varied by changing speed change ratios of the first and the second speed change units in directions opposite to each other, comprising:
Dependencies are inferred from the claim text.