Diesel engine high-pressure fuel control booster pump

Abstract

The invention relates to a diesel engine high-pressure fuel control booster pump. The diesel engine high-pressure fuel control booster pump comprises a shell and is characterized by further comprisinga pressurizing coupling part, an electromagnetic valve assembly and a pressure relief assembly; the pressurization coupling part comprises a booster pump body, a pressurization plunger and a spring;a pressurization plunger cavity and a pressurization cavity which are mutually independent are formed between the pressurization plunger and the booster pump body, and the spring is positioned in thepressurization cavity; a pressure relief passage communicated with the pressurization plunger cavity and an oil return passage communicated with the outside of the booster pump body are arranged in the booster pump body; and the pressure relief passage is in communication with the oil return passage through the electromagnetic valve assembly through controlling the pressure relief assembly, and the pressurization plunger drives the pressurization cavity to realize fuel pressurization due to pressure differential motion. According to the diesel engine high-pressure fuel control booster pump, the fuel pressurization time and the frequency can be accurately controlled, the fuel injection laws of all the working conditions of the diesel engine can be matched, the fuel can be fully combusted, and the pollution can be reduced; the diesel engine high-pressure fuel control booster pump can be suitable for various high-pressure fuel systems with different supercharging ratios, and is compact instructure, good in reliability, flexible in control, fast in response and convenient and rapid to install.

Description

technical field

[0001] The invention relates to a diesel engine, in particular to a high-pressure fuel electronically controlled booster pump for a diesel engine. Background technique

[0002] The fuel injection system is an important part of the diesel engine, and the fuel injection pressure will directly affect the performance and emission of the diesel engine. With the increasingly stringent emission regulations and the demand for motion optimization in all working conditions, the shortcomings of the traditional mechanical fuel injection system and some shortcomings of the existing common rail system have gradually emerged. Compared with the traditional mechanical fuel injection system and the existing common rail system, the electronically controlled booster pump has the advantages of small modification scope of the diesel engine structure, low cost of modification, obvious improvement of the injection pressure of the system, and has great market promotion value. At pr...

Examples

Embodiment Construction

[0031] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0032] see Figure 1 to Figure 5 The shown high-pressure fuel electronically controlled booster pump for a diesel engine includes a housing 1, which is characterized in that it also includes a booster coupling 2 that is mated and connected with the left part of the housing 1, and that is connected with the housing 1. The solenoid valve assembly 3 that is matingly connected on the right, and the pressure relief assembly 4 tightly pressed in the housing 1 through the booster coupling 2 and the solenoid valve assembly 3; the booster coupling 2 includes the right end and the The booster pump body 21 matingly connected to the left part of the housing 1, the booster plunger 22 vertically arranged in the booster pump body 21 and matched with it, located in the booster pump body 21 and used to support The spring 27 of the booster plunger 22; a booster plunge...

technical field

[0001] The invention relates to a diesel engine, in particular to a high-pressure fuel electronically controlled booster pump for a diesel engine. Background technique

[0002] The fuel injection system is an important part of the diesel engine, and the fuel injection pressure will directly affect the performance and emission of the diesel engine. With the increasingly stringent emission regulations and the demand for motion optimization in all working conditions, the shortcomings of the traditional mechanical fuel injection system and some shortcomings of the existing common rail system have gradually emerged. Compared with the traditional mechanical fuel injection system and the existing common rail system, the electronically controlled booster pump has the advantages of small modification scope of the diesel engine structure, low cost of modification, obvious improvement of the injection pressure of the system, and has great market promotion value. At pr...

Examples

Embodiment Construction

[0031] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0032] see Figure 1 to Figure 5 The shown high-pressure fuel electronically controlled booster pump for a diesel engine includes a housing 1, which is characterized in that it also includes a booster coupling 2 that is mated and connected with the left part of the housing 1, and that is connected with the housing 1. The solenoid valve assembly 3 that is matingly connected on the right, and the pressure relief assembly 4 tightly pressed in the housing 1 through the booster coupling 2 and the solenoid valve assembly 3; the booster coupling 2 includes the right end and the The booster pump body 21 matingly connected to the left part of the housing 1, the booster plunger 22 vertically arranged in the booster pump body 21 and matched with it, located in the booster pump body 21 and used to support The spring 27 of the booster plunger 22; a booster plunge...

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