Hydraulic control device and driving force distribution device for four-wheel drive vehicle provided with the same

摘要

The hydraulic control device includes a hydraulic fluid temperature estimation means for estimating the temperature of the hydraulic fluid supplied to the hydraulic clutch (actuator). The hydraulic fluid temperature estimation means calculates an output of logistic regression from an integrated value of driving currents and an average value of driving voltage of the electric motor. If the calculated output of the logistic regression is equal to or more than a first threshold value, the hydraulic fluid estimation means calculates a posteriori probability from such output. If the calculated posteriori probability is equal to or more than the second threshold larger than the first threshold value, the hydraulic fluid temperature estimation means determines the posteriori probability to be a final determination result, thereby determining the temperature of the hydraulic fluid to be a predetermined temperature.

主权项

1. A hydraulic control device comprising:
an electric motor; an oil pump driven by the electric motor; and a control means configured to control an operation of the electric motor, wherein the hydraulic control device controls an operation of an actuator using a hydraulic pressure of hydraulic fluid supplied from the oil pump, the hydraulic control device comprising a hydraulic fluid temperature estimation means configured to estimate a temperature of hydraulic fluid supplied to the actuator, wherein the hydraulic fluid temperature estimation means calculates an output of a logistic regression from an integrated value of driving currents of the electric motor and an average value of driving voltage of the electric motor, and estimates the temperature of the hydraulic fluid based on the calculated output of the logistic regression, and wherein the control means controls the operation of the actuator based on the temperature of the hydraulic fluid estimated using the hydraulic fluid temperature estimation means.