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公开(公告)号：US20220056833A1
公开(公告)日：2022-02-24
申请号：US16646025
申请日：2018-09-21
发明人： Takaaki TANAKA , Masatsugu ARAI , Takayuki SATO , Naoki FUKUDA , Jun IKEDA , Ryuji KOUNO
摘要： A hydraulic drive fan control device is provided with a variable displacement hydraulic pump, a hydraulic motor, a hydraulic drive fan that is driven by the hydraulic motor, a flow amount control valve, a rotational speed detector that detects a rotational speed of an engine, and a controller. The controller outputs a first valve control signal to the flow amount control valve and outputs a first pump control signal to the hydraulic pump to rotate the hydraulic drive fan at a first rotational speed, and outputs a second valve control signal to the flow amount control valve and outputs a second pump control signal to the hydraulic pump, thereby stopping the rotation of the hydraulic drive fan.
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公开(公告)号：US20190023098A1
公开(公告)日：2019-01-24
申请号：US15756241
申请日：2016-09-15
IPC分类号： B60G17/04 , B60G17/015
CPC分类号： B60G17/0416 , B60G11/265 , B60G17/0155 , B60G17/0424 , B60G2202/15 , B60G2300/026 , B60G2400/208 , B60G2400/252 , B60G2400/51222 , B60G2400/7122 , B60L15/20 , B60L50/16 , B60L2200/36 , B60L2240/10 , B60L2240/26 , B60L2240/36 , B60L2240/423 , B60L2240/80 , B60L2260/44 , B60L2270/145 , B60W30/02 , B60W40/12 , Y02T10/7275
摘要： A dump truck pitching control system that can improve the ride quality of a vehicle body and the drive stability during traveling is provided. The present invention includes: a pitching state amount detection section 194 that detects a state amount of the pitching movement of the vehicle body 10; a spring characteristics calculation section 197 that calculates spring characteristics of suspension cylinders 30, based on detection results of stroke sensors 306, pressure sensors 307, and temperature sensors 308; a pitching target amount calculation section 192 that calculates a target amount of the pitching movement of the vehicle body 10, according to the spring characteristics calculated by the spring characteristics calculation section 197; and a torque correction value calculation section 193 that calculates a torque correction value required to correct the pitching amount, according to the spring characteristics calculated by the spring characteristics calculation section 197.
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公开(公告)号：US20240208389A1
公开(公告)日：2024-06-27
申请号：US17908290
申请日：2021-03-19
发明人： Hideaki IIJIMA , Jun IKEDA , Kazunori ISHIHARA , Tatsuya SUGAHARA
摘要： Provided is a dump truck capable of switching a destination of supply of hydraulic oil from a hoist cylinder to a fan motor at an appropriate time. A dump truck comprising: a hydraulic pump for discharging a hydraulic oil by a driving force of the engine; a hoist cylinder for raising and lowering a vessel by the hydraulic oil supplied from the hydraulic pump; a fan motor for driving a fan that supplies a radiator with cooling air by the hydraulic oil supplied from the hydraulic pump; a selector valve capable of being switched between a first position for supplying the hoist cylinder with the hydraulic oil discharged from the hydraulic pump and a second position for supplying the fan motor with the hydraulic oil; and a controller configured to, in a case where the selector valve is in the first position, determine whether an inflow pressure of the hydraulic oil flowing into the selector valve is less than a threshold value, and in a case of determining that the inflow pressure is less than the threshold value, switch the selector valve from the first position to the second position.
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公开(公告)号：US20220281311A1
公开(公告)日：2022-09-08
申请号：US17634585
申请日：2020-02-19
发明人： Kazunori ISHIHARA , Jun IKEDA , Takaaki TANAKA , Yoshifumi NABESHIMA , Hideaki IIJIMA , Tsukasa AKIYAMA
IPC分类号： B60K11/04
摘要： Provided is a technique for improving the cooling efficiency of a vehicle heat exchange system configured to cool a cooling liquid discharged from each of a plurality of heat sources. The vehicle heat exchange system comprises a high-temperature side radiator unit and a low-temperature side radiator unit, the high-temperature side radiator including: a first high-temperature side radiator that faces a first fan and is connected to a high-temperature side discharge pipe; a second high-temperature side radiator that faces a second fan and is connected to a high-temperature side supply pipe; and a high-temperature side connection pipe for supplying the cooling liquid from the first high-temperature side radiator to the second high-temperature side radiator, and the low-temperature side radiator unit including: a first low-temperature side radiator that is arranged to face the second high-temperature side radiator on the upstream side of the cooling air flow, and is connected to a low-temperature side discharge pipe; a second low-temperature side radiator that is arranged to face the first high-temperature side radiator on the upstream side of the cooling air flow, and is connected to a low-temperature side supply pipe; and a low-temperature side connection pipe for supplying the cooling liquid from the first low-temperature side radiator to the second low-temperature side radiator.
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公开(公告)号：US20220235758A1
公开(公告)日：2022-07-28
申请号：US17597043
申请日：2019-11-08
发明人： Takaaki TANAKA , Kazunori ISHIHARA , Jun IKEDA , Juri SHIMIZU
摘要： An engine (12) drives a variable capacity-type hydraulic pump (16), discharged hydraulic oil is selectively supplied to a cooling fan (19) and a hoist cylinder (11) in accordance with switching of a selection valve (17), thereby controlling the same on the basis of each target value. A pump discharge pressure (Pp) of the hydraulic oil discharged from the hydraulic pump (16) and a motor supply pressure (Pm) of the hydraulic oil supplied to a hydraulic motor (18) via the selection valve (17) are detected by sensors (27, 28) and are compared with pressure determination values stored in advance as a pump discharge pressure (Pp) and an actuator supply pressure (Pm) generated when the target value is achieved. Presence/absence of abnormality in the hydraulic actuator control device (15) is determined on the basis of a result of the comparison, and when abnormality is determined to have occurred, control is performed to minimize the capacity of the hydraulic pump (16).
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