GDI engine injector flexible intervention control device and method

Abstract

The invention relates to the technical field of GDI engine injectors, and the embodiment particularly discloses a GDI engine injector flexible intervention control device and method. The GDI engine injector flexible intervention control device comprises an fuel injection pulse width acquisition module, an intervention control module, a microprocessor module and a snifting valve drive module, wherein the microprocessor module is separately connected with the fuel injection pulse width acquisition module, the intervention control module and the snifting valve drive module; and the fuel injectionpulse width acquisition module is further connected with a gasoline ECU, the intervention control module is further separately connected with the gasoline ECU and a fuel injector, and the snifting valve drive module is further connected with a snifting valve. According to the GDI engine injector flexible intervention control device, the GDI engine gasoline and natural gas blending combustion scheme is successfully realized, and a GDI engine is smoothly switched from oil burning to oil-gas blending combustion mode without affecting the normal oil burning mode of the GDI engine.

Description

technical field [0001] The invention relates to the technical field of GDI engine fuel injectors, in particular to a GDI engine fuel injector flexible intervention control device and control method. Background technique [0002] As a clean energy source, natural gas has greater advantages over gasoline and diesel in terms of emissions, safety and economy, so many automakers have launched models that use both gasoline and natural gas. It can be switched between oil-burning and gas-burning modes to meet the needs of users in different situations. At present, there are two mainstream solutions for oil-to-gas conversion, single combustion and blended combustion, of which oil-to-gas single combustion is mainly used in port injection engines. The mixed combustion uses natural gas as the main fuel, uses a small amount of gasoline to ignite natural gas for gas work, and adopts lean combustion technology, which is mainly used in in-cylinder direct injection (GDI) engines. [0003] ...

AI Technical Summary

Problems solved by technology

[0003] With the characteristics of lower fuel consumption and higher power output, GDI engine has become the mainstream configuration of passenger cars at home and abroad in recent years, but currently for GDI engine models because of the characteristics of direct injection in the cylinder, sampling single-burning scheme It is easy to damage the gasoline injector, only natural gas mixed combustion mode can be used

As a result, it has become more difficult to refit GDI engines with natural gas. At present, there is no reliable and safe solution to realize the refitting of oil-gas mixed combustion mode in terms of the intervention technology of GDI engine injectors at home and abroad.

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