| 摘要 |
A continuously-variable transmission, which has a first pulley, which has a first fixed pulley and a first mobile pulley, a second pulley, which has a second fixed pulley and a second mobile pulley, and a drive force transmitting member, which is stretched between the first pulley and the second pulley, is provided, and this continuously-variable transmission has an indicated pressure calculation section, which calculates the indicated pressure of the first pulley, a stroke speed calculation section, which calculates the stroke speed of the first mobile pulley, and an oil pressure calculation section, which, when oil is discharged from an oil chamber, calculates the amount of increase of oil pressure in a first pulley oil chamber that increases compared to the indicated pressure due to the channel resistance of the discharge path, based on the channel resistance and the stroke speed, and a correction section, which, when oil is discharged from the first pulley oil chamber, subtracts the amount of increase of oil pressure from the first pulley pressure based on a target speed ratio and input torque, and corrects the indicated pressure of the first pulley. |
| 主权项 |
1. A continuously-variable transmission comprising:
a first pulley, which comprises:
a first fixed pulley; anda first mobile pulley, which is arranged on a same axis with the first fixed pulley, and which changes a width of a groove formed between the first mobile pulley and the first fixed pulley by moving along an axial direction in accordance with supply and discharge of oil to and from a first pulley oil chamber; a second pulley, which comprises:
a second fixed pulley; anda second mobile pulley, which is arranged on a same axis with the second fixed pulley, and which changes a width of a groove formed between the second mobile pulley and the second fixed pulley by moving along an axial direction; and a drive force transmitting member, which is mounted between the first pulley and the second pulley, wherein the continuously-variable transmission comprises:
an indicated pressure calculating unit configured to calculate an indicated pressure of the first pulley;a stroke speed calculating unit configured to calculate a stroke speed which is a moving speed of the first mobile pulley along the axial direction; andan oil pressure calculating unit configured to calculate an amount of increase of oil pressure in the first pulley oil chamber that increases due to channel resistance of a discharge path, based on the channel resistance and the stroke speed when oil is discharged from the first pulley oil chamber; and wherein, when oil is discharged from the first pulley oil chamber, the indicated pressure calculating unit is configured to subtract the amount of increase of oil pressure from the first pulley pressure calculated based on a target speed ratio and input torque, and calculate the indicated pressure of the first pulley. |
