Patent ID: 9347500
Filing Date: 2016-05-24
CPC Classification: B60K,B60W,F16D,Y02T

Claim Text:
1. A control apparatus of a vehicle including a driving source and an automatic transmission that is driven and controlled by a hydraulic pressure produced from a line pressure as an original pressure, the control apparatus comprising: a hydraulic clutch disposed between the driving source and the automatic transmission; a clutch hydraulic actuator including a piston; a clutch hydraulic control valve configured to produce a piston pressure from the line pressure as the original pressure, the piston pressure being applied to the piston, wherein the piston pressure is limited substantially to the line pressure; a clutch control section configured to operate the piston of the clutch hydraulic actuator to make a stroke to disengage the hydraulic clutch by controlling the piston pressure as a clutch disengagement hydraulic pressure such that an actual piston stroke position is conformed with a target position; an AT control section configured to determine a reference line pressure on the basis of a necessary hydraulic pressure to ensure an operation of the automatic transmission; and a clutch disengagement control section, which controls disengagement of the hydraulic clutch, configured to: upon receiving a clutch disengagement command and disengaging the hydraulic clutch, start line pressure increase control to increase the line pressure to a value higher than the reference line pressure at least before the piston pressure reaches the reference line pressure, and thereby allow the piston pressure to exceed the reference line pressure; and reduce the line pressure when the piston pressure is reduced during an operation of disengagement of the hydraulic clutch.