Electronic fuel oil jetting controller and controlling method for double fuel engine

Abstract

The present invention discloses one kind of electronic fuel oil jetting controller and controlling method for double fuel engine. The double fuel engine includes diesel engine system and gas fuel supply system, and system controller with engine throttle valve position signal as reference for determining the load of the engine. The present invention determines the gas fuel jetting amount and diesel oil inputting amount based on the parameters of engine rotation speed, admission pressure and exhaust temperature, and the gas fuel is fed to the mixer via the 1-12 jetting valves successively opened to mix with air before being jetted to the engine and ignited with the diesel oil the diesel oil engine inputs. The present invention has the advantages of high control precision, easy flow control, simple structure, low manufacture cost, etc.

Description

Technical field: [0001] The invention relates to a dual-fuel engine electronic injection system control method and device for dual-fuel automobile engines, belonging to the technical field of dual-fuel automobile engines. Background technique: [0002] The principle of the diesel-dual fuel EFI system is to allow the internal combustion engine to work synchronously with two fuels. The diesel-natural gas dual-fuel EFI system can add a gaseous fuel supply system to the existing diesel engine to convert a single diesel engine into a dual-fuel engine. Diesel becomes the pilot fuel and lubricant for components used to ignite the gaseous fuel in the compressed state. There are following problems in the diesel-natural gas dual-fuel engine commonly used at present: [0003] 1. In terms of diesel quantity control, the diesel injection quantity is generally controlled by limiting the throttle position of the diesel fuel injection pump through a mechanical mechanism. Therefore, only a...

AI Technical Summary

Problems solved by technology

Because the first type of gas injection valve uses gasoline electronically controlled injectors, the diameter of the control gas flow is generally small, so it cannot meet the gas needs of larger power engines; while the second type is specially designed for gas, but generally There are problems such as high manufacturing precision requirements, difficult manufacturing, and high cost; and the electromagnets in the existing electronically controlled injection valves generally use thrust to make the electromagnet control the taper valve, and the thrust to make the electromagnet not only have many moving parts and complex structure The problem, and because the thrust of the electromagnet is easy to cause the taper valve to produce a large impact force, so there are still problems such as low workability and easy damage to the valve.

Moreover, the existing gaseous fuel supply system does not have a high enough precision to control the injection amount of gaseous fuel, which leads to insufficient fast adjustment of the flow rate of gaseous fuel when the engine load changes rapidly.

And when the engine temperature is high, the gaseous fuel supply system is prone to accidents

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