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Accumulator distribution type fuel injection pump

A technology of fuel injection pump and pressure accumulation type, which is applied in the direction of fuel injection pump, fuel injection device, variable displacement pump components, etc. It can solve the problems of difficulty in ensuring strength, complex structure, and complex structure, so as to prevent partial wear and improve Effects of Durability and Reliability

Inactive Publication Date: 2009-06-03
YANMAR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In this way, high pressure is always applied to the connecting parts of each functional member constituted as a separate structure, so it is difficult to ensure strength, and there are cases where oil leakage and damage are low, and the structure becomes complicated.
[0007] In addition, in the above-mentioned accumulator-type fuel injection pump, a plurality of plunger portions that pressurize fuel into the accumulator chamber are provided, and the plurality of plunger portions are arranged side by side along the cam axis, so that the accumulator-type fuel injection pump is large in size. , while becoming a complex structure

Method used

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  • Accumulator distribution type fuel injection pump
  • Accumulator distribution type fuel injection pump
  • Accumulator distribution type fuel injection pump

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Embodiment Construction

[0034] In order to explain the present invention in more detail, it will be described below with reference to the accompanying drawings.

[0035] First, the schematic configuration of the accumulator type distribution type fuel injection pump of the present invention will be described. Such as figure 1 , figure 2 ,with Figure 3 ~ Figure 5 As shown, the fuel injection pump 1 configured as an accumulator distribution type fuel injection pump includes a pressure accumulating chamber 31 for accumulating high-pressure fuel, a plunger 7 for pressure-feeding fuel to the accumulating chamber 31, and a secondary accumulator. The fuel pressure delivered by the pressure chamber 31 is distributed and supplied to the distribution shaft 9 of the nozzle 29 of each cylinder and the like.

[0036] The plunger 7 is driven by the cam 5 formed on the camshaft 4 to slide up and down through the plunger 11, and the plunger chamber 7 a formed above the plunger 7 is connected to the accumulating chambe...

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Abstract

An accumulator distribution type fuel injection pump usea as a fuel injection pump for low-pollution diesel engine low in fuel consumption and capable of meeting an exhaust emission control requirements, wherein a high-pressure fuel accumulated in an accumulating chamber is distributedly fed to each cylinder through a distribution shaft, functional members forming high-pressure routes such as a plunger, an injection control valve for fuel injection control, the accumulating chamber, and the distribution shaft are disposed inside a hydraulic base (Hb), and a plunger part for accumulating fuel into the accumulating chamber is installed in the hydraulic base.

Description

Technical field [0001] The present invention relates to an electronically controlled pressure accumulator distribution type fuel injection pump in which high pressure fuel accumulated in a pressure accumulating chamber is distributed and supplied to each cylinder by a distribution device. Background technique [0002] In recent years, in diesel engines, there has been a tendency for exhaust emission restrictions to become stricter. It is desired to reduce fuel consumption and reduce NOx and particulates. In order to meet this demand, higher fuel injection pressures for improving combustion efficiency have been developed. [0003] In addition, there is an increasing number of accumulator-type fuel injection pumps of the electronic control method that can increase the fuel injection pressure and can arbitrarily control the injection pressure regardless of the engine speed. [0004] This accumulator fuel injection pump supplies high-pressure fuel accumulated in the accumulator chamb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M41/06F02M47/00F02M41/16F02M59/36F02M63/02F04B1/04F04B23/02F04B49/22F04B53/16
CPCF02M59/366F04B53/16F04B49/22F02M41/16F02M63/0225F04B1/0421F02M41/06F04B23/02
Inventor 新宫健次
Owner YANMAR CO LTD
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