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Hydraulic working rig

A working machine and hydraulic technology, applied in mechanical equipment, engine components, engine control, etc., can solve the problems of rising exhaust gas temperature and inability to regenerate filters, and achieve the effect of improving reliability and stabilizing purification treatment.

Active Publication Date: 2014-11-12
NIHON KENKI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in a small hydraulic excavator with simplified equipment and no discharge control of the hydraulic pump, etc., it is difficult to raise the temperature of the exhaust gas to the temperature required for regenerating the filter, and it is impossible to reduce the accumulation in the filter. Problems with burning particulate matter in the filter to regenerate the filter

Method used

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Examples

Experimental program
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Embodiment Construction

[0071] Hereinafter, a small hydraulic excavator will be exemplified as the hydraulic working machine provided with the exhaust gas purification device according to the embodiment of the present invention, and will be described in detail based on the drawings.

[0072] here, Figure 1 to Figure 7 The first embodiment of the present invention is shown. In the figure, reference numeral 1 denotes a small hydraulic excavator used for excavation work of sand and soil, and the like. This hydraulic excavator 1 generally includes a crawler-type lower running body 2 that can run by itself, and an upper slewing body that is rotatably attached to the lower running body 2 via a turning device 3 and that constitutes a vehicle body together with the lower running body 2 4; and the working device 5 installed on the front side of the upper revolving structure 4 so as to be capable of pitching.

[0073] Here, the work implement 5 is configured as a swing post type work implement, and the work...

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Abstract

The invention provides a hydraulic working rig, which is equipped with a waste gas purifier and can generate hydraulic load in a hydraulic loop to increase the temperature of the waste gas of an engine. In the hydraulic working rig, a load input valve (36) used to heat the waste gas is arranged on a path where the pressure oil from a hydraulic pump (12) is supplied to an output pipe (26) of a hydraulic cylinder (29). When the hydraulic cylinder (29) stops, the temperature of the waste gas flowing into a purifier (19) for removing particles is lowered. When regeneration treatment of the purifier (19) is required, the load input valve (36) is shifted from a neutral position (d) to shift positions (e) and (f). Therefore, any one of first and second safety valves (37, 38) generating hydraulic load may increase the load of the engine (10) of the hydraulic pump (12), thereby increasing fuel consumption and raising the temperature of waste gas.

Description

technical field [0001] The present invention relates to a hydraulic working machine having an exhaust gas purification device suitable for removing harmful substances from exhaust gas of, for example, a diesel engine or the like. Background technique [0002] Generally, a construction machine such as a hydraulic excavator is composed of a lower running body capable of traveling by itself, an upper rotating body rotatably attached to the lower running body, and a pitching motion installed in front of the upper rotating body. The work equipment on the side is constituted. In the upper revolving body, an engine for driving a hydraulic pump is attached to the rear of the revolving frame, and a driver's cab, a fuel tank, a hydraulic oil tank, and the like are attached to the front side of the revolving frame. [0003] Here, a diesel engine is generally used as an engine of a prime mover such as a hydraulic excavator. In addition, the exhaust gas discharged from the diesel engin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/023F02D29/04F15B15/18
CPCY02T10/40E02F9/0866E02F9/2221E02F9/2246F01N3/021F01N3/023F01N11/002F01N2260/04F01N2590/08F01N2900/1606F02D41/029F02D41/1446
Inventor 吉田肇石井元野口修平藤井笃人
Owner NIHON KENKI CO LTD