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公开(公告)号：EP4290085A1
公开(公告)日：2023-12-13
申请号：EP22864662.6
申请日：2022-08-31
发明人： FUKUCHI, Ryohei , ISHIDA, Shota
IPC分类号： F15B11/08 , E02F9/22 , F15B11/02 , F15B11/028
摘要： A construction machine including a solenoid valve that reduces a boom lowering pilot pressure for a second directional control valve and a controller that controls the solenoid valve is provided. The controller computes a first opening degree command value in such a manner that a communication area between a boom lowering pressure reducing valve and a pressure receiving chamber of the second directional control valve decreases in association with a bottom pressure of a boom cylinder, computes a second opening degree command value in such a manner that the communication area increases in association with increase in a boom lowering operation amount, decides a minimum opening degree command value as an opening degree command value of the solenoid valve when an elapsed time after boom raising operation is shorter than a set time and decides a minimum selected value of the first and second opening degree command values as the opening degree command value of the solenoid valve when the elapsed time is equal to or longer than the set time, and outputs a command signal according to the decided opening degree command value to the solenoid valve.
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公开(公告)号：EP4286197A1
公开(公告)日：2023-12-06
申请号：EP22832460.4
申请日：2022-03-11
摘要： A fuel filling device (18) for refueling a fuel tank (14) is disposed in the vicinity of an exhaust gas post-treatment device (10). Specifically, the fuel filling device (18) is disposed over a hydraulic pump (11) provided to an engine (9) and at a height position equivalent to the exhaust gas post-treatment device (10). Therefore, the fuel filling device (18) can be heated for a short period of time by the exhaust gas post-treatment device (10) which is exposed to high temperature soon after the start of the engine (9).
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公开(公告)号：EP4283308A1
公开(公告)日：2023-11-29
申请号：EP22858304.3
申请日：2022-08-02
IPC分类号： G01P7/00
摘要： The purpose of the present invention is to provide a speed measurement device with which it is possible to accurately identify the highest travel speed of a work machine using the result of measurement by an acceleration sensor. The speed measurement device according to the present invention: detects, from within a record of the travel acceleration of a work machine, a change point at which the work machine transitions from an accelerating state to a steady travel state; and identifies the highest travel speed from a record of the travel speed in a period later than the change point.
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公开(公告)号：EP4282690A1
公开(公告)日：2023-11-29
申请号：EP22815648.5
申请日：2022-03-23
摘要： There is provided a dump truck that, when drive wheels (6) slip, is capable of reducing braking torques for the drive wheels (6) to avoid locking of the drive wheels (6), and of generating braking torques for driven wheels (7) to ensure an overall braking torque for the vehicle. The dump truck includes a controller (13) outputting a regenerative torque command value corresponding to an operation amount of a brake pedal (8) to an inverter (11), causing the inverter to regeneratively control electric motors (10), a hydraulic valve (15) for generating a hydraulic pressure corresponding to an operation amount of a brake pedal (9), rear wheel brakes (16) actuated by the hydraulic pressure from the hydraulic valve (15), a higher-pressure selecting valve (19) for selecting a higher one of the hydraulic pressure from the hydraulic valve (15) and a hydraulic pressure from a solenoid proportional valve (18), and front wheel brakes (17) actuated by the hydraulic pressure selected by the higher-pressure selecting valve (19). The controller (13) reduces the regenerative torque command value and output a drive command value corresponding to the reduction amount of the regenerative torque command value to the solenoid proportional valve (18), when the controller (13) determines that slip ratios of the rear wheels (6) are equal to or larger than a predetermined value.
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公开(公告)号：EP4276713A1
公开(公告)日：2023-11-15
申请号：EP21917754.0
申请日：2021-12-27
发明人： FENG, Yixiang , SHINTANI, Hiroshi
IPC分类号： G06Q10/00 , G05B19/418
摘要： A maintenance assistance system that outputs an alarm for a notification of a maintenance request for a management target machine to a predetermined outputting apparatus is provided. The maintenance assistance system generates an evaluation value on the basis of an operation data database, estimates required items to be used for maintenance and a quantity of the required items in regard to a failure item whose occurrence is predicted on the basis of a required item database when an abnormality decision is made in regard to the management target machine on the basis of the evaluation value, estimates, on the basis of the evaluation value and a failure case database, a grace period before a failure occurs in regard to the failure item whose occurrence is predicted, estimates a procurement period required for procurement of the required items from a parts inventory database, and outputs the alarm to the outputting apparatus when the procurement period has no leeway with respect to the grace period.
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公开(公告)号：EP4194619A1
公开(公告)日：2023-06-14
申请号：EP21930336.9
申请日：2021-12-08
发明人： KUMAGAI Kento , IMURA Shinya , TSURUGA Yasutaka , CHIBA Takaaki , AMANO Hiroaki , NISHIKAWA Shinji , NARAZAKI Akihiro , SUGIYAMA Genroku , YAMAMOTO Shinjiro
摘要： The invention of the present application intends to provide a work machine that can ensure high operability by preventing abrupt actuation of an actuator and a shock to a machine body by use of a bleed-off function at the time of starting of the actuator and that can improve the energysaving performance by reducing a bleed-off flow rate after the starting of the actuator. For this purpose, a controller opens a bleed-off valve at a timing at which an operation device is being operated and before a flow rate of a hydraulic pump starts increasing, and closes the bleed-off valve at a timing at which the operation device is being operated and after the flow rate of the hydraulic pump has started increasing.
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公开(公告)号：EP4187026A1
公开(公告)日：2023-05-31
申请号：EP21924832.5
申请日：2021-12-13
摘要： An automated operation controller 45 of an automated work system 10 includes: a work status management section 452 that selects a work content according to a work DB 456 that records a work plan for a hydraulic excavator 1 and a work order in the work plan, creates an operation plan based on the selected work content and information on the surrounding environment measured by laser scanners 34, and outputs a control signal to a vehicle body controller 41 based on the operation plan; and an abnormal object detection section 454 that detects an abnormal object present on a work site based on the information on the surrounding environment measured by the laser scanners 34. When the execution of the operation plan is determined to be hindered by the presence of the abnormal object, the work status management section 452 selects another work content from the work plan.
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公开(公告)号：EP4180259A1
公开(公告)日：2023-05-17
申请号：EP21842839.9
申请日：2021-05-28
IPC分类号： B60L1/00 , B60L7/14 , B60W20/00 , B60W20/13 , B60K6/48 , B60L9/18 , B60W10/08 , H02J7/00 , H02J7/14 , B60L50/10
摘要： When regeneration operation is being performed, electric power on a main-machine side is supplied to an auxiliary-machine side, a voltage on the auxiliary-machine side is controlled to become a first voltage value predetermined on the basis of operating voltage specifications of an auxiliary apparatus, a generator on the auxiliary-machine side is deactivated to stop supply of electric power to the auxiliary-machine side, and electric power on the auxiliary-machine side is supplied to a power storage apparatus. When the regeneration operation is ended, the supply of the electric power from the main-machine side to the auxiliary-machine side is stopped, the generator on the auxiliary-machine side is activated, the generator on the auxiliary-machine side is controlled such that a voltage on the auxiliary-machine side becomes the first voltage value, electric power of the power storage apparatus is supplied to the auxiliary-machine side, and the voltage on the auxiliary-machine side is controlled to become a second voltage value higher than the first voltage value. This enables reduction of fluctuations of a voltage supplied to auxiliary machines at a time of switching of regeneration operation by travel motors.
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公开(公告)号：EP4177696A1
公开(公告)日：2023-05-10
申请号：EP21863895.5
申请日：2021-05-13
发明人： KITAI Sasuga , BANDO Mikio , OGATA Takehito , UOTSU Shinichi
IPC分类号： G05D1/02 , G01S17/931
摘要： A measurement sensor that measures, as three-dimensional point cloud information having a plurality of vertically-adjacent layers, a surface position of an object around the work machine; and an object sensor that senses an object as a sensing subject around the work machine on a basis of information from the measurement sensor are included, and the object sensor acquires three-dimensional point cloud information obtained as a result of measurement by the measurement sensor; senses, as point data, a point where microparticles are measured, on a basis of a relation between distances, from the measurement sensor, of point data of vertically-adjacent layers and variations of distance differences, regarding a plurality of pieces of point data included in the three-dimensional point cloud information; deletes the point data of the point sensed as the point where the microparticles are measured, from the three-dimensional point cloud information; and senses an object around the work machine on a basis of the three-dimensional point cloud information from which microparticle point data has been deleted. Thereby, it is possible to more precisely sense the object as the sensing subject.
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20.发明公开
公开(公告)号：EP4130920A1
公开(公告)日：2023-02-08
申请号：EP21779607.7
申请日：2021-03-12
发明人： MORIZANE Hiroto , HAMADA Tomoyuki , BANDO Mikio , KANAI Masaki
摘要： Provided is a traffic control server, a traffic control system, and a display device capable of wirelessly communicating with the traffic control server that are capable of realizing both safety securement for a manned vehicle and an unmanned vehicle traveling in a mine and prevention of reduction in productivity by controlling interference between the manned vehicle and the unmanned vehicle. An interference control part of the traffic control server generates warning information for performing at least one of displaying a warning screen or making a warning sound to the manned vehicle in accordance with an overlap (interference) among a stop trigger region of the manned vehicle, a travel-permitted section set for the unmanned vehicle, a next travel-permitted section that is the travel-permitted section to be subsequently set for the unmanned vehicle, and a warning region set for the travel-permitted section, and a server-side communication control part transmits the warning information to the manned vehicle.
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