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Fuel system of heavy-duty diesel engine

A technology for heavy-duty diesel engines and fuel systems, which is used in charging systems, mechanical equipment, engine components, etc., to solve problems such as the inability to automatically discharge fuel gas absorbed by negative pressure, affecting the filtration efficiency of fuel filters, etc.

Pending Publication Date: 2018-08-28
DONGFENG COMML VEHICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems existing in the prior art that the fuel gas absorbed and released by negative pressure during engine operation cannot be automatically discharged, which affects the filtration efficiency of the fuel filter, and to provide a fuel filter that can automatically discharge fuel through negative pressure suction during engine operation. Heavy-duty diesel fuel system that releases gas and improves fuel filter efficiency

Method used

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  • Fuel system of heavy-duty diesel engine
  • Fuel system of heavy-duty diesel engine
  • Fuel system of heavy-duty diesel engine

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Embodiment 1

[0049] see Figure 1 to Figure 4 , a fuel system for a heavy-duty diesel engine, comprising a fuel tank 1, a low-pressure fuel delivery pump 2, a fuel filter 3, a fuel injector assembly 4, and a pre-filter 5, the fuel tank 1 and the pre-filter 5 are fixedly connected to the vehicle frame, and the The low-pressure fuel delivery pump 2 and the fuel filter 3 are fixedly connected to the engine, the fuel injector assembly 4 is located inside the rocker chamber, the fuel filter 3 is a double element filter, and the base of the fuel filter 3 32 is provided with an automatic exhaust three-way valve 31, the automatic exhaust three-way valve 31 is set near the oil outlet of the filter element, including a valve seat 311, a valve body 312, a valve ball 313, the valve seat 311, valve body 312 Both are hollow structures with openings at both ends. The exhaust port 314 of the valve body 312 communicates with the oil inlet port of the fuel tank 1 through the exhaust pipeline 8, and the oil ...

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Abstract

A fuel system of a heavy-duty diesel engine comprises an oil tank, a low-pressure oil conveying pump, a fuel filter and a fuel injector assembly, wherein an automatic exhaust three-way valve is arranged on a base of the fuel filter, an inlet of the automatic exhaust three-way valve communicates with an oil outlet of the oil tank through a first oil path and the low-pressure oil conveying pump sequentially, a first outlet of the automatic exhaust three-way valve communicates with an oil inlet of the low-pressure oil conveying pump through a second oil path, the fuel ejector assembly and a fuelreturn pipeline, and a second outlet of the automatic exhaust three-way valve communicates with an oil inlet of the oil tank through an exhaust pipeline. Through the design, automatic exhaust of the engine in the running state is achieved, the filtering efficiency of the fuel filter is improved, and the service life of a prefilter is prolonged.

Description

technical field [0001] The invention belongs to the field of engine fuel control, and in particular relates to a heavy-duty diesel engine fuel system, which is suitable for realizing automatic exhaust when the engine is running and improving the filtration efficiency of a fuel filter. Background technique [0002] The engine fuel system is usually composed of fuel pumps, fuel filters, fuel injectors and other components. The air is mixed to form a combustible mixture to ensure the fuel flow required by the engine under various working conditions. [0003] Chinese patent: The invention patent with authorized announcement number CN104047782A and authorized announcement date of September 17, 2014 discloses an engine fuel system and control method, including: engine electronic control unit, manual oil pump, electronic fuel pump, fuel pump and The diesel oil filter, the engine electronic control unit, is used to control the operation of the electronic fuel pump during the engine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M37/20F02M37/22F02M37/00
CPCF02M37/0023F02M37/0052F02M37/20F02M37/22
Inventor 樊有林林浩严波李建峰闻玉奇杨细元周志亮吴红亮
Owner DONGFENG COMML VEHICLE CO LTD
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