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公开(公告)号：US12123167B2
公开(公告)日：2024-10-22
申请号：US17831905
申请日：2022-06-03
申请人： KUBOTA CORPORATION
发明人： Teruo Kunizawa , Kiyoshi Matsui , Junki Ito , Haruhito Ikeda , Hisayuki Hiramatsu , Satoshi Osaki , Atsushi Matsumoto
CPC分类号： E02F9/0883 , E02F9/2066 , E02F9/26 , F02D19/022 , F02D19/027 , F02D29/04
摘要： A working machine includes: a machine body; a prime mover that is mounted on the machine body; a fuel cylinder that contains a fuel; a vaporizer that vaporizes the fuel sent from the fuel cylinder and supplies the fuel to the prime mover; a temperature detector that detects a temperature correlating with a decrease in the temperature of the vaporizer; and a controller that imposes restraint on the flow rate of the fuel flowing from the vaporizer to the prime mover when the temperature detected by the temperature detector is lower than or equal to a first temperature.
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公开(公告)号：US11466435B2
公开(公告)日：2022-10-11
申请号：US16919313
申请日：2020-07-02
发明人： Shiho Izumi , Shuuichi Meguriya , Ryuu Narikawa , Kouji Ishikawa , Tarou Akita
摘要： A work machine (1) having a controller (40) that can perform area limiting control, the work machine further includes a machine control ON/OFF switch (17) that alternatively selects an ON position permitting execution of the area limiting control and an OFF position prohibiting execution of the area limiting control. The controller (40) has an engine control section (63) that performs automatic idling control when a predetermined period of time (T1) has elapsed after a point in time when all of operation levers (1, 23) have attained a neutral state. The engine control section (63) is configured to execute the automatic idling control during when the switch (17) is in the OFF position and not to execute the automatic idling control during when the switch (17) is in the ON position.
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公开(公告)号：US11448119B2
公开(公告)日：2022-09-20
申请号：US16766457
申请日：2017-11-24
发明人： Björn Lundstedt , Marcus Olsén
摘要： The invention relates to a method for controlling a turbocharger system (10) fluidly connected to an exhaust manifold (102) of a combustion engine (100). The turbocharger system (10) comprises a turbocharger turbine (22) operable by exhaust gases from said exhaust manifold, and a tank (40) with pressurized gas, said tank being fluidly connectable to said turbocharger turbine. The method comprises the steps of: determining an engine operational mode in which the combustion engine runs below a predetermined speed, determining an external load requiring engine torque which at said engine operational mode would cause the combustion engine to stall, and subsequently injecting pressurized gas from said tank to drive said turbocharger turbine such that the turbocharger turbine is at least partly driven by said pressurized gas, thereby preventing stalling of the combustion engine.
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公开(公告)号：US11339555B2
公开(公告)日：2022-05-24
申请号：US16491791
申请日：2018-01-23
发明人： Jan-Frederik Kuhn , Stefan Traub , Stephan Schinacher , Marcus Hiemer , Robert Morrison , Jürgen Legner , Sven Bieber
IPC分类号： E02F9/22 , A01B67/00 , B60W10/06 , F02D41/04 , F02D29/02 , F02D29/04 , F02D31/00 , F02D41/02 , F16H61/465 , F16H59/36
摘要： A process for determining a setpoint rotational speed of a work machine engine, having a continuously variable transmission, based on operation of power hydraulics. The setpoint rotational speed for highly productive operation is determined, without knowledge current operation of the power hydraulics, by a basic engine speed setting. With knowledge of the current operating state, the setpoint rotational speed is determined by the basic speed settings and low or high engine speed settings. The low speed setting alone determines setpoint rotational speeds that are lower than the basic speed setting or a combination of the low and basic speed settings. The high speed setting alone determines setpoint rotational speeds that are higher than the basic speed setting or a combination of the basic and high speed settings. The speed settings can comprise a setpoint rotational speed range of above a reciprocal transmission range of the variable transmission.
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公开(公告)号：US11255074B2
公开(公告)日：2022-02-22
申请号：US15540292
申请日：2016-03-03
申请人： KOMATSU LTD.
发明人： Hiroki Yamamoto , Shinichiro Hosoya , Takashi Noda
IPC分类号： E02F3/76 , E02F9/20 , B60K31/00 , F02D29/02 , F02D29/04 , F02D41/02 , F02D41/04 , F02D41/10 , B62D11/00 , E02F3/84
摘要： A control system for a work vehicle includes an acceleration detection device and a controller. The acceleration detection device detects an acceleration of the work vehicle. The controller determines whether the acceleration is greater than a first threshold and reduces the a vehicle speed when the acceleration continues to be equal to or greater than the first threshold over a predetermined first determination time period.
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公开(公告)号：US11105070B2
公开(公告)日：2021-08-31
申请号：US16330378
申请日：2017-03-31
摘要： To increase frequency of use of auto idle, an engine is accelerated even more quickly than before and work involving a heavy load can be performed within a short period of time when an operator resumes work and recovers a speed of the engine. When an operation lever device is operated and the speed is low because of auto idle control, a pilot pump is unloaded to thereby reduce load torque on the engine. Operation of a compressor is also suspended while an air conditioner is operating. Furthermore, for a target speed of the engine, a speed at which work can be performed is set and the engine is accelerated. When the engine thereafter reaches a predetermined speed or a predetermined period of time thereafter elapses, the pilot pump is loaded and the operation of the compressor for the air conditioner is resumed.
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公开(公告)号：US20210172656A1
公开(公告)日：2021-06-10
申请号：US17110609
申请日：2020-12-03
申请人： LG ELECTRONICS INC.
发明人： Heejoong JANG , Hojong JEONG
摘要： Proposed is a gas heat-pump system including: a compressor of an air conditioning module; a gas engine generating a drive force of the compressor; and a turbocharger primarily first-level pressure to a fuel-to-air mixture and supplying the fuel-to-air mixture to the gas engine or applying second-level pressure to the fuel-to-air mixture to which the first-level pressure is applied and supplying the fuel-to-air mixture to the gas engine.
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公开(公告)号：US10947701B2
公开(公告)日：2021-03-16
申请号：US16980055
申请日：2019-09-24
发明人： Koji Hyodo , Tetsuji Tanaka , Isamu Aoki , Masaki Nukii , Yuki Ahiko
摘要： Provided is a working vehicle capable of, while reducing fuel consumption, improving traveling performance only when high traveling performance is required.
A wheel loader 1 comprises: an engine 3; a variable displacement HST pump 41; a variable displacement HST motor 42 connected to the HST pump 41 through a closed circuit; pressure sensors 72A, 72B configured to load pressure of the HST motor 42; and a controller 5, wherein the controller 5 is configured to, in a case of determining that a load pressure detection value P is included in a predetermined pressure range of greater than load pressure Pα corresponding to flat ground traveling and smaller than load pressure Pγ corresponding to an excavation operation, increase maximum rotational speed of the engine 3 only within the predetermined pressure range.-
公开(公告)号：US10557251B2
公开(公告)日：2020-02-11
申请号：US15554316
申请日：2016-03-10
发明人： Shinya Imura , Shinji Nishikawa , Manabu Edamura , Kouji Ishikawa , Masatoshi Hoshino , Shinji Ishihara
摘要： The first engine speed or a work machine is higher than the minimum engine speed, and the second engine speed is higher than the first engine speed and lower than the maximum engine speed. The ratio of the change in the target engine speed to the change in the operation amount of the engine speed instructing device when the operation amount of the engine speed instructing device is changed from the operation amount for instructing the minimum speed to the operation amount for instructing the first engine speed is larger than the ratio of the change in the target engine speed to the change in the operation amount of the engine speed instructing device when the operation amount of the engine speed instructing device is changed from the operation amount for instructing the second engine speed to the operation amount for instructing the maximum speed.
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公开(公告)号：US10465619B2
公开(公告)日：2019-11-05
申请号：US15737495
申请日：2016-07-28
发明人： Yoichi Iihoshi , Toshio Hori , Yoshihiko Akagi , Shinsaku Tsukada
IPC分类号： F02D41/00 , F02M25/08 , F02D29/02 , F02D29/04 , F02D29/06 , B60W10/02 , B60W10/06 , B60W30/18 , F02D41/30 , F02D41/02 , F02D41/04 , F02D41/08 , F02D41/12 , F02D41/14
摘要： Introduction of a low fuel consumption technique such as downsizing turbos and idling stop decreases an intake pipe negative pressure (pump loss) of an internal combustion engine, and results in difficulty in emitting (evaporative fuel purge) a volatile fuel (volatile fuel) in a fuel tank by the negative pressure of the intake pipe of the internal combustion engine. A control device includes: a purge control unit which controls a purge valve which emits a volatile fuel of a fuel tank or a canister to an intake pipe of an internal combustion engine; and a power transmission control unit which controls a power transmission mechanism between the internal combustion engine and a drive wheel, and, in a state where the power transmission control unit disconnects a clutch, and the vehicle is coasting, the purge control unit opens the evaporative fuel valve and purges an evaporative fuel to the intake pipe.
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