公开(公告)号：US09643826B2

公开(公告)日：2017-05-09

申请号：US14427818

申请日：2014-09-18

Applicant: Komatsu Ltd.

Inventor： Shinji Kaneko ,  Taishi Oiwa ,  Yoshio Yokouchi ,  Hideyuki Hiraiwa ,  Hiroshi Yamamoto

IPC: G06F7/70 ,  G06F19/00 ,  G06G7/00 ,  B66F9/075 ,  E02F9/22 ,  B66F9/20 ,  F02D29/04 ,  B66F9/22 ,  F02D29/02 ,  F02D41/10 ,  F02D41/30 ,  B66F9/07

CPC classification number: B66F9/07572 ,  B66F9/07 ,  B66F9/20 ,  B66F9/22 ,  E02F9/2246 ,  F02D29/02 ,  F02D29/04 ,  F02D41/10 ,  F02D41/3005

Abstract: A forklift includes a hydraulic pump being a variable displacement pump driven by an engine, a hydraulic motor driven with fluid from the pump, a storage storing first and second groups, and a predetermined lift pressure setting value, the first group including output characteristics each representing relation between a rotational speed of the engine and a torque of the engine for each lift pressures, the second group including output characteristics each representing relation between the rotational speed and the torque for each pump pressures, and determining a greater one of first and second torques as a target torque of the engine, the first torque being calculated from one selected from the first group using the lift pressure setting value or an actual lift pressure and the rotational speed, the second torque being calculated from one selected from the second group using the pump pressure and the rotational speed.

公开(公告)号：US20160257540A1

公开(公告)日：2016-09-08

申请号：US14427818

申请日：2014-09-18

Applicant: KOMATSU LTD.

Inventor： Shinji Kaneko ,  Taishi Oiwa ,  Yoshio Yokouchi ,  Hideyuki Hiraiwa ,  Hiroshi Yamamoto

IPC: B66F9/075 ,  F02D41/30 ,  F02D41/10 ,  B66F9/22 ,  F02D29/02

CPC classification number: B66F9/07572 ,  B66F9/07 ,  B66F9/20 ,  B66F9/22 ,  E02F9/2246 ,  F02D29/02 ,  F02D29/04 ,  F02D41/10 ,  F02D41/3005

Abstract: A forklift includes a hydraulic pump being a variable displacement pump driven by an engine, a hydraulic motor driven with fluid from the pump, a storage storing first and second groups, and a predetermined lift pressure setting value, the first group including output characteristics each representing a relation between a rotational speed of the engine and a torque of the engine for each lift pressures, the second group including output characteristics each representing a relation between the rotational speed and the torque for each pump pressures, and determining a greater one of first and second torques as a target torque of the engine, the first torque being calculated from one selected from the first group using the lift pressure setting value or an actual lift pressure and the rotational speed, the second torque being calculated from one selected from the second group using the pump pressure and the rotational speed

Abstract translation: 叉车包括作为由发动机驱动的可变排量泵的液压泵，由泵的流体驱动的液压马达，存储第一和第二组的存储器以及预定的提升压力设定值，第一组包括每个代表 所述第二组包括各自代表每个泵压力的转速和转矩之间的关系的输出特性，以及确定第一和第二组中的较大的一个 第二扭矩作为发动机的目标扭矩，使用提升压力设定值或实际升程压力和转速从第一组中选择的一个中计算出第一扭矩，第二扭矩由从第二组中选择的一个计算得到 使用泵的压力和转速