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公开(公告)号：US11173890B2
公开(公告)日：2021-11-16
申请号：US16490986
申请日：2018-02-23
摘要： To provide a power regeneration system for a working vehicle that can effectively use a regenerative electric energy.
A first electric circuit for supplying an electric power generated by the first generator to a traveling motor, a voltage detector for detecting an actual voltage of the first electric circuit, a second electric circuit for supplying an electric power generated by a second generator to an auxiliary device, a step-down device connected to the first electric circuit and the second electric circuit, and a controller are provided. The controller estimates the voltage of the first electric circuit after a predetermined time has elapsed from the present time, based on information on a traveling state of a work vehicle and the actual voltage detected by the voltage detector, and outputs a drive command to the step-down device when the estimated voltage is equal to or more than a threshold.-
公开(公告)号：US10107341B2
公开(公告)日：2018-10-23
申请号：US15451455
申请日：2017-03-07
发明人： Naoki Fukuda , Tadashi Osaka , Ryuji Kouno , Masatsugu Arai , Takanobu Ikari , Takaaki Tanaka
IPC分类号： F16D48/06
摘要： Provided is a clutch control device for a work machine capable of controlling a fan to an appropriate rotational speed. In the clutch control device for the work machine, a controller includes a target fan rotational speed calculation module that calculates a target fan rotational speed for the fan, a clutch characteristic curve storage module that stores a plurality of clutch characteristic curves, a clutch command calculation module that outputs with reference to a clutch characteristic curve a first clutch control signal corresponding to the target fan rotational speed, a feedback control module that output a second clutch control signal based on the difference between the target fan rotational speed and an actual fan rotational speed, and an adder that adds the first clutch control signal and the second clutch control signal to output a third clutch control signal.
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公开(公告)号：US11124075B2
公开(公告)日：2021-09-21
申请号：US16631891
申请日：2018-06-19
发明人： Satoru Kaneko , Shinji Sugimoto , Takayoshi Nakamura , Tadashi Osaka , Masatsugu Arai , Naoki Fukuda
摘要： A dump truck 100 including: an engine 1; a generator 10 driven by the engine 1; and a pair of driving wheels 3L and 3R arranged to the left and right of a vehicle body frame 7 includes: a traveling electric motor 12L including a plurality of electric motors 12La, 12Lb, and 12Lc that are coupled to the driving wheel 3L and simultaneously drive the driving wheel 3L; and a traveling electric motor 12R including a plurality of electric motors 12Ra, 12Rb, and 12Rc that are coupled to the driving wheel 3R and simultaneously drive the driving wheel 3R. Thereby, drive systems corresponding to loads of dump trucks or the like can be configured using identical components.
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4.发明授权公开(公告)号：US11834033B2
公开(公告)日：2023-12-05
申请号：US17293949
申请日：2019-11-27
发明人： Mitsuhiro Kadota , Masatsugu Arai , Takayuki Satou , Naoki Fukuda
CPC分类号： B60W20/50 , B60K6/26 , B60L3/003 , B60L7/12 , B60L7/16 , B60W2300/125 , B60Y2200/92
摘要： A power regeneration device 21 that converts the power of a main engine DC line 16 connected to a main engine power generator 12 through a rectification circuit 14 to supply the converted power to an accessory DC line 34 connected to an accessory power generator 31 through a rectification circuit 32 includes a plurality of power conversion modules 221 to 22N configured such that input sections 221a to 22Na are connected in series. The main engine power generator 12 and a power consumption device 15 are controlled such that a voltage input to the power regeneration device 21 does not exceed a voltage upper limit value Vm and a portion between a positive electrode terminal (+) and a negative electrode terminal (−) of each of the input sections of the power conversion modules to be stopped is short-circuited by a bypass device and the voltage upper limit value Vm is decreased when some of the plurality of power conversion modules 221 to 22N are stopped. With this configuration, operational continuity can be improved while a device size increase is prevented.
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公开(公告)号：US10583743B2
公开(公告)日：2020-03-10
申请号：US15764556
申请日：2016-09-08
发明人： Tomonori Takada , Takanobu Ikari , Takashi Ikimi , Akihiro Nakamura , Masatsugu Arai , Naoki Fukuda , Takaaki Tanaka
IPC分类号： B60L7/06 , B60K11/06 , H02P3/22 , B60L1/02 , B60L1/00 , B60W30/18 , B60K6/46 , B60K7/00 , H02M3/335 , H02P3/18 , H02P5/74 , B60K1/00 , B60P1/04
摘要： In a regenerative braking device of a dump truck comprising an engine, a first generator and a second generator driven by the engine, at least one travel motor driven by generated electric power of the first generator and at least one fan motor to which generated electric power of the second generator is inputted via a first rectifier circuit, the regenerative braking device comprises: a resistive element to which regenerating electric power from the at least one travel motor in regenerative braking is supplied and which is cooled by at least one fan driven by the at least one fan motor and converts electric energy into heat energy and dissipates heat; and a DC/DC converter that inputs a part of the regenerating electric power which is supplied to the resistive element to an output line of the first rectifier circuit via a second rectifier circuit.
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公开(公告)号：US11332115B2
公开(公告)日：2022-05-17
申请号：US16631587
申请日：2018-06-04
摘要： A power regeneration system of a work vehicle includes: a first generator (12) and a second generator (31) that are driven by an engine (11); a first electric circuit (C1) for supplying electric power to traveling motors (10L, 10R); a second electric circuit (C2) for supplying electric power to an auxiliary device (35); a voltage step down converter (21) providing electric power from the first electric circuit to the second electric circuit; and a controller (51) that determines whether a travel mode of the work vehicle is a powering mode or a regeneration mode in order to control driving of the voltage step down converter. If the travel mode is the regeneration mode, the controller provides the regenerative power from the first electric circuit through the voltage step down converter to the second electric circuit, in order to drive the auxiliary device with the regenerative power.
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