If the fuel pump or control circuits have breakdown, the fuel injection system will be less fuel pressure, even if the fuel injector is normal, the fuel also cant be injected.

如果燃油泵或控制电路出现故障，会造成供油系统没有燃油压力，即使喷油器工作正常，燃油也不能正常喷射。

The mechanism for carbon deposit and blocking of fuel injector is studied and researched from the view of structure, gasoline quality and operating conditions.

从喷油器结构、汽油品质及汽车运行工况等方面探讨了喷油器积碳的机理。

The fuel injector is basically a tiny electric valve, which opens and closes with an electric signal.

油器通常是一个较小的电动阀，由电信号控制打开和关闭。

The conventional structure of a entire concave die is not applicable for extrusion of fuel injector bodies because of shape of fuel injector bodies.

喷油器体因形状所致，其挤压成形无法采用传统的整体凹模结构。

With 4-valve technology, the fuel injector is mounted vertically in the center of cylinder head for better combustion effect and superior fuel economy.

采用四气门技术，喷油器在气缸盖上居中垂直安装，燃烧更充分，具备出色的燃油经济性。

After the motor vehicle is used for a long time, a little carbon deposit is formed in the needle valve surface of fuel injector and the fuel injection quality will be affected.

汽车经长时间使用后，喷油器针阀表面会形成少量积碳，影响其喷油质量。

The fuel injector can realize homogeneity and fuel stratified injection in a cylinder, thereby improving the efficiency of the motor and environment conservation.

本发明可实现缸内均质及分层燃烧，从而提高发动机效率和环保性。

It is found that we can tell whether there is bubble in fuel injector system according to the vibration of last-part pressure wave.

供油系统中是否产生汽泡，可从压力波尾部的振蕩情况来判断。

By theoretical analysing and calculating, we find the short needle valve fuel injector can further decrease the impact stress of the needle valve to the sealed conical surface.

经理论分析和计算发现，短针阀喷油器可以进一步降低针阀对密封座面的沖击应力。