CRAWLER WORK VEHICLE

摘要

An occurrence of steering clutch slippage is reliably determined in order to protect the steering clutch. A crawler work vehicle includes left and right steering clutches, left and right steering brakes, a rotation speed detecting difference device, a clutch hydraulic pressure obtaining device, and a clutch protecting device. The rotation speed difference detecting device detects a rotation speed difference between the input and output of each of the steering clutches. The clutch hydraulic pressure obtaining device obtains a clutch hydraulic pressure supplied to each steering clutch. The clutch protecting device refers to the rotation speed difference and the clutch hydraulic pressure, computes a steering clutch heat rate, and compares the computed heat rate with a preset first threshold to execute a steering clutch protection process.

主权项

1. A crawler work vehicle comprising:
an engine; left and right travel devices that respectively have a crawler and a drive wheel for driving the crawler; a power transmission device that transmits power of the engine to the drive wheels of the left and right travel devices; left and right steering clutches that are disposed between the power transmission device and the left and right drive wheels,. and that transmit or block power; left and right steering brakes that are respectively disposed between the left and right steering clutches and the left and right drive wheels, and that brake rotation of the left and right drive wheels; a rotation speed difference detecting device that detects a rotation speed difference between an input and an output of each of the steering clutches; a clutch hydraulic pressure obtaining device that obtains a clutch hydraulic pressure supplied to the steering clutches; and a clutch protecting device that refers to the rotation speed difference and the clutch hydraulic pressure, that computes a steering clutch heat rate, and that compares the steering clutch heat rate that was computed with a preset first threshold to execute a steering clutch protection process.