公开(公告)号：US09079613B1

公开(公告)日：2015-07-14

申请号：US14114394

申请日：2012-10-01

Applicant: KOMATSU LTD.

Inventor： Takeshi Yoshikawa ,  Taneaki Fujino

IPC: B60W10/02 ,  B60W10/06 ,  B60W10/18 ,  B62D11/08 ,  E02F9/02 ,  E02F9/20 ,  E02F9/26

CPC classification number: B62D11/08 ,  B60W10/02 ,  B60W10/06 ,  B60W10/18 ,  E02F9/02 ,  E02F9/202 ,  E02F9/2062 ,  E02F9/2066 ,  E02F9/226 ,  E02F9/26 ,  E02F9/268 ,  F02D29/04 ,  F02D41/021

Abstract: A crawler work vehicle includes an engine, left and right travel devices, a power transmission device, left and right steering clutches, left and right steering brakes, a rotation speed detecting device, a brake hydraulic pressure obtaining device, and a brake protecting device. The rotation speed detecting device detects an output rotation speed of the steering brakes. The brake hydraulic pressure obtaining device obtains a brake hydraulic pressure supplied to the steering brakes. The brake protecting device refers to the output rotation speed and the brake hydraulic pressure to compute a heat rate of the steering brakes, and executes a protection process of the steering brakes by reducing the engine output upon determining the heat rate that was computed is equal to or greater than a preset first threshold.

Abstract translation: 履带式车辆包括发动机，左右行驶装置，动力传递装置，左右转向离合器，左右转向制动器，转速检测装置，制动液压获取装置和制动保护装置。 转速检测装置检测转向制动器的输出转速。 制动液压获取装置获得供给到转向制动器的制动液压。 制动保护装置是指输出转速和制动液压，以计算转向制动器的热量，并且通过在计算出的热速率等于或等于（1））时减小发动机输出来执行转向制动器的保护过程 或大于预设的第一阈值。

公开(公告)号：US12276079B2

公开(公告)日：2025-04-15

申请号：US18710308

申请日：2022-12-27

Applicant: KOMATSU LTD.

Inventor： Takeshi Yoshikawa ,  Hiroaki Takeshima ,  Naoya Akiyama ,  Shinichi Otaka ,  Kazushi Nakata ,  Osamu Yatsuda

IPC: E02F3/04 ,  E02F3/84 ,  E02F9/02 ,  E02F9/20 ,  E02F9/22 ,  F15B13/06 ,  F15B15/18 ,  E02F3/76

Abstract: A crawler-type work machine includes left and right steering brakes configured to brake left and right output shafts, a turning motor configured to produce a rotation speed difference between the left and right output shafts, work implement cylinders configured to drive a work implement attached to a vehicle body, a hydraulic pressure supply unit configured to supply hydraulic fluid to the turning motor and the work implement cylinders, and a controller configured to control the hydraulic pressure supply unit. The controller is configured to execute a hydraulic fluid amount control in order to reduce the hydraulic fluid amount supplied from the hydraulic pressure supply unit to the turning motor when the work implement cylinders are driven while the turning motor is rotating.

公开(公告)号：US20150217805A1

公开(公告)日：2015-08-06

申请号：US14114394

申请日：2012-10-01

Applicant: KOMATSU LTD.

Inventor： Takeshi Yoshikawa ,  Taneaki Fujino

IPC: B62D11/08 ,  E02F9/20 ,  E02F9/26 ,  E02F9/02

CPC classification number: B62D11/08 ,  B60W10/02 ,  B60W10/06 ,  B60W10/18 ,  E02F9/02 ,  E02F9/202 ,  E02F9/2062 ,  E02F9/2066 ,  E02F9/226 ,  E02F9/26 ,  E02F9/268 ,  F02D29/04 ,  F02D41/021

Abstract: A crawler work vehicle includes an engine, left and right travel devices, a power transmission device, left and right steering clutches, left and right steering brakes, a rotation speed detecting device, a brake hydraulic pressure obtaining device, and a brake protecting device. The rotation speed detecting device detects an output rotation speed of the steering brakes. The brake hydraulic pressure obtaining device obtains a brake hydraulic pressure supplied to the steering brakes. The brake protecting device refers to the output rotation speed and the brake hydraulic pressure to compute a heat rate of the steering brakes, and executes a protection process of the steering brakes by reducing the engine output upon determining the heat rate that was computed is equal to or greater than a preset first threshold.

Abstract translation: 履带式车辆包括发动机，左右行驶装置，动力传递装置，左右转向离合器，左右转向制动器，转速检测装置，制动液压获取装置和制动保护装置。 转速检测装置检测转向制动器的输出转速。 制动液压获取装置获得供给到转向制动器的制动液压。 制动保护装置是指输出转速和制动液压，以计算转向制动器的热量，并且通过在计算出的热速率等于或等于（1））时减小发动机输出来执行转向制动器的保护过程 或大于预设的第一阈值。

公开(公告)号：US08869921B2

公开(公告)日：2014-10-28

申请号：US13995545

申请日：2012-10-01

Applicant: Komatsu Ltd.

Inventor： Takeshi Yoshikawa ,  Taneaki Fujino

IPC: B62D11/08 ,  E02F9/20 ,  E02F9/22 ,  B62D11/00

CPC classification number: B62D11/08 ,  B62D11/001 ,  B62D11/005 ,  E02F9/2025 ,  E02F9/225 ,  F02D29/04 ,  F02D31/001 ,  F02D41/021

Abstract: 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.

Abstract translation: 可靠地确定转向离合器滑动的发生，以保护转向离合器。 履带式车辆包括左右转向离合器，左右转向制动器，转速检测差值装置，离合器液压获取装置和离合器保护装置。 旋转速度差检测装置检测每个转向离合器的输入和输出之间的转速差。 离合器液压获取装置获得供给每个转向离合器的离合器液压。 离合器保护装置是指转速差和离合器液压，计算转向离合器加热速度，并将计算出的热量与预设的第一阈值进行比较，以执行转向离合器保护过程。

公开(公告)号：US11131079B2

公开(公告)日：2021-09-28

申请号：US16808591

申请日：2020-03-04

Applicant: KOMATSU LTD.

Inventor： Takeshi Yoshikawa ,  Hiroaki Takeshima ,  Yoshito Komatsu

IPC: E02F9/20 ,  F16D48/02 ,  E02F9/26 ,  G07C5/00 ,  G07C5/08 ,  B62D11/00 ,  B62D11/08 ,  E02F9/02 ,  F16D48/06 ,  E02F3/76

Abstract: A work vehicle monitoring system includes a work vehicle and a monitoring device provided on an exterior of the work vehicle. The work vehicle includes a steering clutch, a rotary member having a first hydraulic fluid supply channel, a drive unit, a support member having a second hydraulic fluid supply channel, a sealing ring disposed between the first hydraulic fluid supply channel and the second hydraulic fluid supply channel, a controller that controls a pressure of a hydraulic fluid inside the first hydraulic fluid supply channel and the second hydraulic fluid supply channel, and an external output component that outputs data related to the pressure, a rotational speed, and a time. The monitoring device accepts the data from the external output component and outputs maintenance information about the sealing ring when a predicted wear amount of the sealing ring obtained from the determination basis data exceeds a specific threshold.