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Excavator

A kind of excavator and engine technology, applied in the direction of earth mover/excavator, mechanical equipment, engine control, etc., can solve problems such as rising

Pending Publication Date: 2021-10-15
SUMITOMO CONSTRUCTION MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the actual torque changes dynamically, and increases with a certain degree of delay when the engine load increases

Method used

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Embodiment Construction

[0019] First, reference figure 1 The excavator 100 as the excavator according to the embodiment of the present invention will be described. figure 1 It is a side view of the excavator 100. In the present embodiment, an upper rotating body 3 is rotatably mounted via the rotary mechanism 2 on the lower traveling body 1. The lower traveling body 1 is driven by a hydraulic motor 2M. Walking hydraulic motor 2M includes the left row of the left track to walk with a hydraulic motor 2ml and drive the right line of the right track, 2MR (in figure 1 Not visible). The rotary mechanism 2 is driven by a hydraulic motor 2a mounted on the upper rotating body 3. However, the rotary hydraulic motor 2a can also be a rotational electric generator as an electric actuator.

[0020] Aromatic arm 4 is attached to the upper rotating body 3. A stick 5 is attached to the front end of the boom 4, and the bucket 6 as the end attachment device is attached to the front end of the arm 4. The boom 4, the strip 5...

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PUM

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Abstract

A shovel (100) comprises a lower traveling body (1), an upper turning body (3) that is turnably mounted on the lower traveling body (1), an engine (11) that is mounted on the upper turning body (3), a main pump (14) that is driven by the engine (11), and a controller (30) that controls the flow rate of a hydraulic fluid discharged by the main pump (14). The controller (30) delays main pump (14) responsiveness until the actual torque of the engine (11) rises to a level corresponding to the load when the load on the engine (11) has been increased.

Description

Technical field [0001] The present invention relates to a excavator as an excavator. Background technique [0002] In the past, there was known that there is a excavator that controls the spit amount of the hydraulic pump so that even if the spitting pressure of the hydraulic pump changes, the absorption torque of the hydraulic pump does not exceed the rated torque of the engine (refer to Patent Document 1.) . [0003] When the engine load is small, the actual torque of the engine rotating at a predetermined speed is changed in less than the level of rated torque. The actual torque is then increased by an increase in the amount of fuel injection when the engine load increases, and the rated torque is reached. As such, the actual torque changes dynamically, and the engine load increases with a certain degree of delay. [0004] Prior art literature [0005] Patent document [0006] Patent Document 1: Japanese Laid-Open No. 2009-2318 Inventive content [0007] Technical topics to b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F9/20E02F9/22F15B11/02
CPCE02F9/2246E02F9/2282E02F9/2285E02F9/2292E02F9/2296E02F9/2235F15B2211/20523F15B2211/20546F15B2211/6652F15B2211/6654F15B2211/6651F02D29/04F04B17/05F04B49/065F04B2201/1202F04B2205/09E02F9/2025E02F9/2221E02F9/123F15B11/02E02F9/2029
Inventor 佐野公则白谷龙二
Owner SUMITOMO CONSTRUCTION MACHINERY