Gasoline engine gasoline sprayer nozzle

Abstract

The invention relates to a gasoline engine gasoline sprayer nozzle comprising a needle valve assembly and a valve seat assembly. The needle valve assembly comprises a needle valve rod, a armature and a valve head, wherein the armature and the valve head are fixed at the upper end and the lower end of the needle valve rod correspondingly. The valve seat assembly comprises a valve sleeve and a valve seat fixed at the lower end of the valve sleeve. The needle valve rod is placed in the valve sleeve. A gasoline guiding channel is formed between the needle valve rod and the valve sleeve. The valve head is placed in a central hole of the valve seat. A spraying hole is formed in the end of the valve seat. The valve head is of a hollow structure. A hollow cavity of the valve head constitutes a part of a fuel oil channel and communicates with the gasoline guiding channel through valve head gasoline inlet hole in the upper end of the valve head, and a gasoline spraying oblique hole is formed in the end of the valve head. In the gasoline engine gasoline sprayer nozzle, the fuel oil channel in the valve seat is formed in the sealing valve head, so that machining difficulty is reduced; flowing and blocking of the fuel oil is better facilitated by sealing through a cone valve; and the sealing valve head has the functions of the fuel oil channel and sealing simultaneously, and the valve seat only keeps guiding and sealing functions, so that the machining difficulty of the whole nozzle is reduced greatly.

Description

technical field [0001] The invention relates to the technical field of fuel injection systems for gasoline engines, in particular to electronically controlled fuel injector nozzles for direct injection engines in gasoline cylinders. Background technique [0002] In recent years, with energy depletion, rising oil prices, global warming and corresponding surges in CO2 emissions, improving the fuel economy of engines while meeting emissions regulations has become more urgent. Gasoline Direct Injection (GDI, Gasoline Direct Injection) engine combines the advantages of compression ignition engine and ignition engine, so that the engine shows great potential in terms of fuel economy and emission reduction, and also represents The development direction of gasoline engine. [0003] Since the 1990s, Mitsubishi, Toyota, Ford, Volkswagen, Mercedes-Benz, BMW and many other automobile companies have developed their own GDI engine models and put them on the market. An important weapon f...

AI Technical Summary

Problems solved by technology

[0004]The current gasoline nozzle sealing valve head mostly adopts the ball valve structure, the ball head is welded on the valve stem, the ball head only has the function of the sealing ring, and the valve The fuel passage is processed inside the seat, so that the valve seat has a fuel passage, a guide element and a sealing ring, which makes the processing of the valve seat difficult, high in cost and difficult to guarantee in quality

Images