Fuel injector micro leakage test and seal test system

Abstract

The invention provides a fuel injector micro leakage test and seal test system and relates to the technical field of an engine part test device. A fuel tank is connected with an electric fuel pump, and provides fuel to an energy storage tank through the electric fuel pump, thereby ensuring sufficient fuel in a fuel path, and meanwhile, playing a certain pressure stabilization role; a pressure regulator is connected with an outlet of the energy storage tank; the pressure regulator carries with a fuel return system to ensure stable primary pressure in the fuel path and ensure the redundant fuel to the fuel tank; a heat exchanger is connected with the pressure regulator, and is used for ensuring change range of temperature of the fuel to be always kept within + / -1 degree in the test process; a fuel filter is connected with the heat exchanger, and is used for filtering impurities in the fuel; and a self-reliant pressure regulator is connected with the fuel filter, and is used for providing a certain pressure of fuel to a fuel rail and a standard pressure chamber, and controlling opening and closing of the fuel path between the self-reliant pressure regulator and the fuel rail through a solenoid valve A. The fuel injector micro leakage test and seal test system is fast in response speed, high in test precision, good in reliability and simple and quick to use.

Description

technical field [0001] The invention relates to the technical field of engine component testing devices, in particular to a micro-leakage testing and sealing test system for fuel injectors. Background technique [0002] Gasoline Direct Injection (GDI) technology injects gasoline directly into the cylinder, and gasoline evaporation cools the air in the cylinder, which can increase the compression ratio of the gasoline engine and improve the thermal efficiency of the gasoline engine. The fuel injection pressure of the GDI gasoline engine is relatively high, and the gasoline oil is atomized well, which can ensure the instantaneous vaporization of micron-sized droplets, so that enough gasoline injected in a short period of time can form a good combustible mixture. In-cylinder direct injection technology is one of the effective measures to reduce gasoline engine fuel consumption, improve fuel economy, and reduce pollutant emissions. With the increasingly stringent emission regula...

AI Technical Summary

Problems solved by technology

[0003] The leakage of the fuel injector is extremely small in many cases, and the traditional method is difficult to detect or the detection cost is relatively high. To solve this problem, it is necessary to propose a method that is simple, low in cost, high in test accuracy, and good in reliability. Fuel injector tightness testing method and testing system

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