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A Radial Piston Fuel Supply Pump Applied to High Pressure Common Rail Fuel Injection System

A fuel injection system and high-pressure common rail technology, applied in the direction of fuel injection pump, fuel injection device, charging system, etc., can solve the problems of restricting the application of high-pressure fuel pump, lack of superiority, etc., achieving low cost, reduced leakage, and reduced The effect of fatigue wear

Active Publication Date: 2016-08-17
NANYUE FUEL INJECTION SYST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-pressure oil supply pump formed by using this invention is mainly used in medium and heavy diesel engines, but in the field of light diesel engines, it does not have advantages in terms of installation space, speed adaptation range, production cost and maintenance, which limits The application of this kind of high pressure oil pump in this field

Method used

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  • A Radial Piston Fuel Supply Pump Applied to High Pressure Common Rail Fuel Injection System
  • A Radial Piston Fuel Supply Pump Applied to High Pressure Common Rail Fuel Injection System
  • A Radial Piston Fuel Supply Pump Applied to High Pressure Common Rail Fuel Injection System

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Embodiment Construction

[0048] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0049] see figure 1 , the figure is a schematic diagram of the structure of the high-pressure common rail fuel injection system. The system mainly includes: radial plunger oil supply pump 100, common rail pipe 6, fuel injector 8, ECU 4, wiring harness 5 and other components. The working principle of the system is: the fuel delivery pump 2 sucks the fuel from the engine oil tank 1 to the metering valve 3 at a certain pressure through the principle of vacuum adsorption, and the metering valve 3 determines its opening degree through the given control current of the ECU4, thereby controlling the flow of fuel. The size of the amount of oil. The fuel entering the plunger chamber of the radial plunger fuel supply pump 100 is pressurized from the fuel...

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Abstract

A radial plunger fuel supply pump applied to a high-pressure common rail fuel injection system disclosed by the present invention comprises: a pump body, a pump cover connected to the pump body; at least one plunger radially arranged in the pump body Valve unit; at least one high-pressure oil pipe joint axially installed on the pump body; a pump shaft supported in the pump body and the pump cover, the section of the pump shaft located in the pump shaft driving cavity is covered with an eccentric drive ring, the The eccentric drive ring is driven by the pump shaft to rotate and contacts with the end of the plunger in the plunger valve unit extending into the pump shaft drive cavity; a set of plunger return elastic rings outside the eccentric drive ring, the plunger One end of the plunger in the valve unit extending into the drive chamber of the pump shaft is connected with the plunger return elastic ring. The high-pressure oil supply pump of the present invention has compact structure and small external dimensions, and can be conveniently installed on light-duty diesel engines. At high speeds, the oil supply pump is more efficient in supplying oil. It can withstand the pump oil pressure above 250MPa.

Description

technical field [0001] The invention relates to a radial plunger high-pressure fuel supply pump for a diesel engine, in particular to a high-pressure fuel supply pump applied to a high-pressure common rail fuel injection system. Background technique [0002] Electronically controlled high-pressure common rail fuel injection system, as the best choice for diesel engines to meet China III, China IV or higher emission standards, consists of high pressure fuel supply pumps, high pressure fuel rails, electronically controlled fuel injectors, ECU and sensors. In this system, the main function of the high-pressure fuel supply pump is to regularly supply enough fuel to the high-pressure fuel rail to ensure the stability of the fuel pressure in the high-pressure fuel rail. Its oil supply timing and oil supply volume are controlled by ECU. According to the mechanical principle, there are two types of high-pressure oil supply pumps: in-line plunger pump and radial rotor pump; accordin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M59/10F02M59/44F02M59/46
Inventor 龙美彪谭四喜黄民备欧阳玲湘
Owner NANYUE FUEL INJECTION SYST CO LTD
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