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    • 4. 发明申请
    • FAILURE DIAGNOSIS METHOD FOR DUMP TRUCK AND DEVICE THEREFOR
    • 用于推动卡车及其装置的故障诊断方法
    • WO1997037870A1
    • 1997-10-16
    • PCT/JP1997001156
    • 1997-04-03
    • KOMATSU LTD.HASEGAWA, NobukiSUGANO, YukioWATANABE, Genichirou
    • KOMATSU LTD.
    • B60P01/04
    • B60G17/0185B60G2300/026B60G2400/25B60G2400/252B60G2400/38B60G2400/50B60G2400/70B60G2600/042B60G2600/08B60G2600/124B60G2800/91B60G2800/914B60G2800/92B60G2800/95B60G2800/97B60P1/045B60P1/283
    • It is possible to prevent generation of failure in a dump truck and diagnose a true cause of failure in a short period of time. Thus the present failure diagnosis method diagnoses an operation and function of at least one of respective devices such as an engine at a predetermined engine rotation speed, transmission, respective axles, respective suspensions, hydro-pneumatic systems and a brake while a body (4) descends after evacuation of loading. The failure diagnosis device comprises body operating means (50) for raising or lowering a body, a direction switching valve (7) for receiving a command from the body operating means to lower the body, and a self-diagnosis control device (11) for using state detecting means (20) to detect and store a state of at least one of the respective devices at a predetermined engine rotation speed when the body operating means is at a predetermined operative position and for comparing a magnitude of a detected value and a rate of change with reference values on the basis of hysteresis data when carrying out failure diagnosis.
    • 可以防止自卸车发生故障,并在短时间内诊断故障原因。 因此,本发明的故障诊断方法,在本体(4)的情况下,以规定的发动机转速,变速器,各轴,各自的悬架,液压气动系统和制动器等各种装置,例如发动机的操作和功能进行诊断, 撤离后下降。 故障诊断装置包括用于升高或降低身体的主体操作装置(50),用于从身体操作装置接收命令以使身体下降的方向切换阀(7),以及用于 当身体操作装置处于预定的操作位置时,使用状态检测装置(20)检测和存储各个装置中的至少一个的状态,并且将检测值和速率 在进行故障诊断时基于滞后数据的参考值进行变化。