Phase redundancy fault-tolerant control system and method for electronic fuel injection system of diesel engine

Abstract

The invention discloses a phase redundancy fault-tolerant control method for an electronic fuel injection system of a diesel engine and relates to the field of power control. The phase redundancy fault-tolerant control system comprises a crankshaft signal panel and a cam signal panel running along with an engine, two Hall rotating speed sensors are respectively configured, and four sensor signals are processed by a Hall rotating speed signal processing module and then are accessed to a microprocessor. The processor software respectively combines the four paths of signals into four rotating speed signal groups, calculates the phase and the driving moment of the diesel engine, monitors and judges whether the rotating speed signal group used for phase calculation currently is abnormal or not in real time, and switches to other rotating speed signal groups to recalculate the phase and the driving moment of the diesel engine if the rotating speed signal group is abnormal, so that rapid and stable redundancy switching is realized. The invention is suitable for the field of marine power control, comprises an electronic control monoblock pump diesel engine, an electronic control common rail diesel engine, a gas engine and a multi-point injection dual-fuel engine, and is used for accurately and reliably controlling fuel oil and fuel gas injection or spark plug ignition.

Description

technical field [0001] The patent of the present invention belongs to the field of power control, and specifically relates to a diesel engine control system. It can be applied to electronically controlled unit pump diesel engines, electronically controlled common rail diesel engines, gas engines and dual-fuel engines with multi-point injection to achieve precise and reliable control of fuel, gas injection or spark plug ignition. Background technique [0002] In order to reduce emissions from marine diesel engines and improve air pollution, the International Maritime Organization (IMO) has implemented Tier III emission regulations in 2016. From the current relevant regulations on fuel economy and emissions, the mechanization development route has been far from meeting the development requirements. In order to meet the economic and emission performance requirements of laws and regulations, electronically controlled single-pump diesel engines, electronically controlled common r...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this solution is that it causes a waste of sensor resources. If an ECU fails, its corresponding sensor will also lose its function. The sensor resources are not fully utilized, the reliability of the ECU needs to be enhanced, and the reliability of the speed signal of a single diesel engine is not high.

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