Gasoline direct injection fuel injection pump

Abstract

The invention discloses a gasoline direct injection fuel injection pump. The gasoline direct injection fuel injection pump is directly installed on an engine cylinder head and comprises a pump body, a pressure stabilizing component, a fuel inlet valve component, an electromagnetic driving component, a plunger valve component, a fuel outlet valve component, a fuel drain valve component and a fuel outlet connecting sleeve, wherein the pressure stabilizing component is installed on the pump body, and the fuel outlet connecting sleeve is hollow inside and is connected with a high-pressure fuel supply rail. According to the gasoline direct injection fuel injection pump, an air inlet camshaft is used for driving a plunger in the plunger valve component, thus, compared with outside jet engines, the pump has the advantages that the friction force and the chain force are reduced, an engine can operate quietly, and fuel is saved. The fuel injection pump provides the fuel which is stored in the high-pressure rail, the fuel is transferred to a fuel injector through the high-pressure rail, and fuel injection quantity parameters of the fuel injector are used for accurately controlling the injection quantity of the fuel of the fuel injection pump through sending of electric signals by an electronic control unit (ECU). The fuel injector controls the injection quantity of the fuel accurately through electrons according to the air intake volume, the fuel and the air are fully atomized and mixed, a combustion chamber is uniformly filled with gas mixtures which conform to a theoretical air-fuel ratio, and every drop of fuel is used fully.

Description

technical field [0001] The invention relates to the technical field of a gasoline engine fuel injection system, and is particularly suitable for a gasoline direct injection fuel injection pump for fuel supply of an in-cylinder gasoline direct injection engine (GDI). Background technique [0002] At present, Audi, Mercedes-Benz, Ford, Volkswagen, Nissan, Mazda, Mitsubishi, Toyota, Honda, Renault and many other foreign companies and research institutions have developed in-cylinder gasoline direct injection (GDI) products and prototypes. According to data, some GDI For the engine, compared with the traditional port injection (PFI), the mixed gas does not need to pass through the throttle valve, so the air resistance caused by the throttle valve to the mixed gas can be reduced, the fuel economy can be increased by about 15%, and the power output can also be increased 10% or so. [0003] Gasoline direct injection machines have been used on a certain scale in Europe and Japan, an...

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Problems solved by technology

[0004] In a traditional out-of-cylinder injection engine, the fuel is injected into the intake pipe, and the fuel injector should be separated from the valve by a certain distance, so that the gasoline has enough time to mix with the air after being injected into the intake pipe. After this space is fully mixed, it is introduced into the cylinder for combustion. For this traditional design, it will inevitably cause insufficient time for the air and gasoline to mix, and at the same time, fuel will be consumed during the process of mixing and entering the combustion chamber, which will affect the engine. economical and dynamic

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