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Light vehicle straight injection pump of diesel engine

A fuel injection pump, diesel engine technology, applied in the direction of fuel injection pump, mechanical equipment, engine components, etc., can solve the problems of no competitive advantage, high price, complex structure, etc., to achieve simple structure, high fuel injection pressure, reliable operation. Effect

Inactive Publication Date: 2004-09-22
WUXI OIL PUMP NOZZLE INST
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Compared with the in-line fuel injection pump, these new fuel injection technology products have the disadvantages of complex structure and high price, and they do not have a competitive advantage in the Chinese market

Method used

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  • Light vehicle straight injection pump of diesel engine
  • Light vehicle straight injection pump of diesel engine
  • Light vehicle straight injection pump of diesel engine

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Embodiment Construction

[0015] The structural features and working conditions of the specific embodiments proposed according to the present invention will be described in detail below in conjunction with the accompanying drawings.

[0016] figure 1 and figure 2 Shown in is an embodiment of the present invention, which is suitable for a low-emission PM type fuel injection pump for a light-duty vehicle diesel engine. In this kind of fuel injection pump, the plunger coupling adopts a double helical groove and double oil return hole structure, which can significantly increase the oil return speed and is very beneficial to reduce HC emissions. Wherein plunger (1) can select 9,9.5,10, four kinds of diameters of 10.5mm for use. The plunger sleeve (2) adopts an integral flange structure, and this structure is compared with the hanging basket structure ( image 3 ) has higher strength and rigidity, which is beneficial to increase the allowable pump end pressure. The oil deflecting ring (14) used to preve...

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Abstract

An in-line oil-spraying pump for the diesel engine of light car features that its plunger sleeve has the integral flange structure, the oil retaining ring for preventing cavitation is directly installed in the oil channel on pump body, and its roller is an integral structure without lining sleeve. Its structural parameters are also disclosed. Its advantages are simple structure, low cost, high pumping pressure up to 100 MPa, high oil supplying rate up to 30 cu.mm / day, and less pollution.

Description

Technical field: [0001] The invention belongs to an in-line fuel injection pump for diesel engines, in particular to an in-line fuel injection pump for diesel engines suitable for light vehicles. technical background: [0002] Since the 1990s, countries around the world have paid more and more attention to environmental issues, especially the increasingly stringent emission requirements for diesel engines used as vehicle power. For example, EU countries have formulated Euro 1, Euro 2, and Euro 3 emission regulations, which gradually increase the requirements, and Euro 4 standards to be achieved in the future. my country's national standard GB17691-1999 requires that the emission limits equivalent to Euro 1 and Euro 2 be reached in 2001 and 2005 respectively. [0003] implement stage implement date CO g / kW.h HC g / kW.h NOx g / kW.h PM(g / kW.h) ≤85 kW >85 kW A 2001.1.1 4.5 1.1 ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M59/10
Inventor 缪雪龙陈希颖王先勇李成相
Owner WUXI OIL PUMP NOZZLE INST