Rail pressure control method and device for ship engine electronic control fuel system and storage medium

Abstract

The invention provides a rail pressure control method and device for a ship engine electronic control fuel system. The rail pressure of the system is controlled through a MeUn valve, a PCV valve and a PLV valve; and when an engine normally operates, the MeUn valve is mainly used for controlling the rail pressure of the system, after the engine breaks down, the MeUn valve, the PCV valve and the PLV valve cooperatively control the rail pressure of the system to be stabilized near the preset rail pressure, stability is good, and safety and reliability are achieved.

Description

technical field [0001] The invention belongs to the technical field of internal combustion engines, in particular to a rail pressure control method and device for an electronically controlled fuel system of a ship engine. Background technique [0002] At present, the electronically controlled fuel system of some marine engines only includes a mechanical pressure limiting valve (PLV valve). When the pressure of the fuel system exceeds the mechanical pressure limiting valve, the pressure limiting valve can be opened for pressure relief. Continue to run under the rail pressure; [0003] Some marine engine electronically controlled fuel systems are equipped with PCV valves (electrically controlled pressure relief valves), but they are not precisely controlled, but simply distinguish between open and closed states for pressure relief. This kind of scheme is abruptly involved. It is impossible to accurately control the rail pressure and it is easy to cause large fluctuations in t...

AI Technical Summary

Problems solved by technology

[0003] Some marine engine electronically controlled fuel systems are equipped with PCV valves (electrically controlled pressure relief valves), but they are not precisely controlled, but simply distinguish between open and Close the two states for pressure relief. This kind of solution is abruptly intervened, cannot accurately control the rail pressure and is likely to cause large fluctuations in the rail pressure, which will affect the stable operation of the system;

[0004] Some marine engine electronically controlled fuel systems use PCV valves and MeUn valves (proportional flow valves) to control rail pressure at the same time, but mainly rely on PCV valves to control rail pressure, while The PCV valve is a high-frequency drive valve, and it is easy to cause damage to the valve body due to high heat generation when driven for a long time

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