Shift control for continuously-variable transmission
First Claim
1. A shift control apparatus comprising:
- a continuously-variable transmission;
a sensing section to sense a vehicle speed of a vehicle and an accelerator operation condition of the vehicle; and
a controller to control an actual transmission ratio of the continuously-variable transmission in a first mode in accordance with the vehicle speed and accelerator operation condition, to determine a second-mode downshift characteristic and a second-mode upshift characteristic in accordance with the accelerator operation condition, and to control the actual transmission ratio of the continuously-variable transmission in a second mode in response to a driver'"'"'s acceleration request by performing a downshift operation to a target downshift transmission ratio determined according to the second-mode downshift characteristic and an upshift operation according to the second mode upshift characteristic.
1 Assignment
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Accused Products
Abstract
A shift control apparatus for a continuously-variable transmission includes a controller for controlling a transmission ratio in a normal mode in accordance with a sensed vehicle speed and a sensed accelerator operation condition. The controller determines a second-mode downshift characteristic and a second-mode upshift characteristic in accordance with a driver'"'"'s acceleration demand; and controls the transmission ratio in a kickdown shift control mode in response to a driver'"'"'s acceleration request by performing a downshift operation to a target downshift transmission ratio determined according to the second-mode downshift characteristic and an upshift operation according to the second mode upshift characteristic.
49 Citations
28 Claims
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1. A shift control apparatus comprising:
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a continuously-variable transmission;
a sensing section to sense a vehicle speed of a vehicle and an accelerator operation condition of the vehicle; and
a controller to control an actual transmission ratio of the continuously-variable transmission in a first mode in accordance with the vehicle speed and accelerator operation condition, to determine a second-mode downshift characteristic and a second-mode upshift characteristic in accordance with the accelerator operation condition, and to control the actual transmission ratio of the continuously-variable transmission in a second mode in response to a driver'"'"'s acceleration request by performing a downshift operation to a target downshift transmission ratio determined according to the second-mode downshift characteristic and an upshift operation according to the second mode upshift characteristic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A shift control process for a continuously-variable transmission, the shift control process comprising:
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producing a rapid acceleration request signal in accordance with a sensed accelerator operation condition;
controlling an actual transmission ratio of the continuously-variable transmission in a first mode in accordance with a sensed vehicle speed and an accelerator operation quantity determined from the sensed accelerator operation condition when the rapid acceleration request signal is absent;
determining a second-mode downshift characteristic and a second-mode upshift characteristic in accordance with the accelerator operation condition, and controlling the actual transmission ratio of the continuously-variable transmission in a second mode in response to the rapid acceleration request signal, by performing a downshift operation to a target downshift transmission ratio determined according to the second-mode downshift characteristic and an upshift operation according to the second mode upshift characteristic.
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28. A shift control apparatus for a continuously-variable transmission, the shift control apparatus comprising:
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means for detecting a driver'"'"'s kickdown acceleration request by monitoring variation of an accelerator operation condition;
means for controlling an actual transmission ratio of the continuously-variable transmission in a normal mode in accordance with a sensed vehicle speed and a sensed accelerator operation quantity determined from the sensed accelerator operation condition when the kickdown acceleration request is absent;
means for determining a kickdown-mode downshift characteristic and a kickdown-mode upshift characteristic in accordance with a driver'"'"'s acceleration demand estimated by the sensed accelerator operation quantity, and means for controlling the actual transmission ratio of the continuously-variable transmission in a kickdown mode in response to the kickdown acceleration request, by performing a downshift operation to a target downshift transmission ratio determined according to the kickdown-mode downshift characteristic and an upshift operation according to the kickdown-mode upshift characteristic.
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Specification