초록 ▼

A hydraulic pressure control device in an automatic transmission, provided thereon with a mechanism capable of regulating oil pressure in response to a command value from a calculating device, including: a device for detecting oil pressure in the hydraulic pressure control device; a device for compa

A hydraulic pressure control device in an automatic transmission, provided thereon with a mechanism capable of regulating oil pressure in response to a command value from a calculating device, including: a device for detecting oil pressure in the hydraulic pressure control device; a device for comparing the oil pressure thus detected with a target value; and a device for correcting the command value from the calculating device in accordance with the result of the comparison, wherein the oil pressure actually generated in the hydraulic pressure control device is directly detected, and the command value to control the oil pressure is corrected while the oil pressure thus detected is compared with an ideal value (a target value). With this arrangement, highly accurate oil pressure control can be continuously carried out, irrespective of variations peculiar to a mechanical system and variations in use conditions.

대표청구항 ▼

A hydraulic pressure control device in an automatic transmission, provided with a means for regulating control oil pressure in response to a command value from a calculating means, comprising: means for detecting whether or not a defined period of time has passed since an affirmative shift judgment

A hydraulic pressure control device in an automatic transmission, provided with a means for regulating control oil pressure in response to a command value from a calculating means, comprising: means for detecting whether or not a defined period of time has passed since an affirmative shift judgment by said calculating means; means for detecting whether or not engine load is substantially constant means for detecting control oil pressure in said hydraulic pressure control device when said defined period of time has passed and said engine load is substantially constant and generating a detected oil pressure value; means for comparing the detected oil pressure value with a target value and producing a comparison value; and means for correcting the command value of said calculating means in accordance with the comparison value.