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US 2015/0316147 A1Published application
Automatic transmission apparatus
AssigneeHonda Motor Co., Ltd.
InventorTakashi AOKI
Life of this patent
Estimating the term…
Abstract
A predetermined transmission ratio of a direct coupling mechanism arranged in parallel to the continuously variable transmission and directly connects the input shaft and the output shaft to transmit rotation of the input shaft to the output shaft at that predetermined transmission ratio is set to the minimum transmission ratio of the continuously variable transmission, and the direct coupling mechanism is connected to the input shaft through a third clutch.
Claims10
An automatic transmission apparatus, having:
- an input shaft connected to a power source installed in a vehicle;
- an output shaft connected to driven wheels;
- a continuously variable transmission equipped with a drive pulley connected through a first clutch to the input shaft, a driven pulley connected through a second clutch to the output shaft, and an endless flexible member wound therearound;
- a direct coupling mechanism that is arranged in parallel to the continuously variable transmission and directly connects the input shaft and the output shaft to transmit rotation of the input shaft to the output shaft at a predetermined transmission ratio;
- and
- a controller that controls establishing of a first power transmission system by means of the continuously variable transmission and a second power transmission system by means of the direct coupling mechanism;
- wherein the improvement comprises:
- the predetermined transmission ratio of the direct coupling mechanism is set to a minimum transmission ratio of the continuously variable transmission;
- the direct coupling mechanism is connected to the input shaft through a third clutch;
- and
- the controller connects the first clutch and the second clutch and disconnects the third clutch when establishing the first power transmission system, while connecting the third clutch and disconnecting the first clutch and the second clutch when establishing the second power transmission system.
8 more elements
A method for controlling an automatic transmission apparatus, having:
- an input shaft connected to a power source installed in a vehicle;
- an output shaft connected to driven wheels;
- a continuously variable transmission equipped with a drive pulley connected through a first clutch to the input shaft, a driven pulley connected through a second clutch to the output shaft, and an endless flexible member wound therearound;
- a direct coupling mechanism that is arranged in parallel to the continuously variable transmission and directly connects the input shaft and the output shaft to transmit rotation of the input shaft to the output shaft at a predetermined transmission ratio;
- and
- controlling establishing of a first power transmission system by means of the continuously variable transmission and a second power transmission system by means of the direct coupling mechanism;
- wherein the improvement comprises:
- the predetermined transmission ratio of the direct coupling mechanism is set to a minimum transmission ratio of the continuously variable transmission;
- the direct coupling mechanism is connected to the input shaft through a third clutch;
- and
- the step of controlling connects the first clutch and the second clutch and disconnects the third clutch when establishing the first power transmission system, while connecting the third clutch and disconnecting the first clutch and the second clutch when establishing the second power transmission system.
8 more elements
Dependencies are inferred from the claim text.