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construction machinery

A technology of construction machinery and mechanical connection, applied in mechanical equipment, motor, engine control and other directions, can solve problems such as poor fuel consumption efficiency, and achieve the effect of high-efficiency charging and discharging

Active Publication Date: 2016-10-12
NIHON KENKI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, high-output engines can list environmental problems such as poor fuel efficiency, exhaust, and noise.

Method used

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Embodiment Construction

[0037] use Figure 1 to Figure 6 and Figure 9 A first embodiment of the present invention will be described. In addition, in the following description, the machine efficiency is not considered for the sake of easy understanding, but by controlling the machine efficiency in consideration, more accurate control can be performed.

[0038] figure 1 It is a figure which shows the structure of the hydraulic excavator (representative example of a construction machine) to which this embodiment is applied. figure 1 Among them, the hydraulic excavator 18 has a traveling body 201 and a rotating body 202 .

[0039] The traveling body 201 has a function of driving the construction machine by the traveling hydraulic motor 8 .

[0040] The rotating body 202 is rotated relative to the running body 201 by the rotating mechanism 12, and has a boom 203, an arm 204, and a bucket for excavating on the other side (for example, the right side facing forward) of the front portion of the rotating...

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Abstract

The present invention realizes a construction machine equipped with an engine and capable of using an external power source. Construction machinery is equipped with an electric storage device (14) that is charged by an external power source, and is assisted by the electric storage device when the output of the engine (1) is insufficient, and the charge amount of the electric storage device is used in a planned manner based on the working time, The discharge amount is controlled based on the load state, thereby efficiently using the power storage device. In particular, it has: an engine (1), an auxiliary machine load (16) connected to the engine, an auxiliary motor (2) driven by the engine, and a power converter (9 , 10, 13); the power storage device (14) connected to the DC side of the power converter, the power storage device is charged from an external power source via a charging device (15).

Description

technical field [0001] The present invention relates to a construction machine such as a hydraulic excavator equipped with an engine and an electric storage device. Background technique [0002] Conventionally, a construction machine such as a hydraulic excavator has a hydraulic pump driven by an engine, and the hydraulic pump drives hydraulic working equipment such as a bucket cylinder, an arm cylinder, a boom cylinder, and a traveling hydraulic motor. [0003] In addition, in order to cope with heavy loads during work, construction machines need to fluctuate greatly in engine output, and also need high-output engines that have poorer fuel consumption than low-output engines. [0004] However, the high-output engine can list environmental problems such as poor fuel efficiency, exhaust gas, and noise. [0005] Therefore, in recent years, as a solution to these problems, a hybrid construction machine is proposed, which is equipped with a low-output engine with good fuel cons...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F9/20F02D29/02B60L11/14B60L50/16
CPCB60L2200/40E02F9/2075E02F9/2091F02D29/02Y02T90/14B60L1/003B60L2240/423B60L2240/427B60L2240/547B60L2240/80Y02T10/70Y02T10/7072B60L53/14B60L50/16B60L53/00B60L58/13Y02T10/64E02F9/20
Inventor 石田诚司佐佐木正贵梶田勇辅佐竹英敏枝村学藤岛一雄泉枝穗
Owner NIHON KENKI CO LTD
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