Patent ID: 7361121
Filing Date: 2008-04-22
Classification: F16D,Y10T

Abstract:
1. A control device for an input clutch of a work vehicle, comprising: an input clutch provided between an engine and a transmission on a power transmission path for the engine; an orifice provided on an oil passage supplying pressure oil to the input clutch, the orifice having an original pressure at an upstream side and a clutch pressure of the input clutch at a downstream side; input clutch pressure control means provided to communicate with the oil passage on the downstream side from the orifice to control the clutch pressure of the input clutch such that the clutch pressure of the input clutch is reduced as an operation amount becomes greater; clutch pressure detection means for detecting the clutch pressure of the input clutch; determination means for determining whether or not a rising speed of the clutch pressure of the input clutch is less than a limit rising speed of the original pressure; and original pressure control means which adjusts the original pressure such that a difference between the original pressure and the detected clutch pressure of the input clutch becomes a predetermined offset pressure when it is determined that the clutch pressure rising speed of the input clutch is less than the original pressure limit rising speed, and adjusts the original pressure such that the original pressure is raised at the original pressure limit rising speed when it is determined that the clutch pressure rising speed of the input clutch is equal to or higher than the original pressure limit rising speed.