Methanol-diesel dual-fuel engine control system and method

Abstract

The invention discloses a methanol-diesel dual-fuel engine control system and method. precise control over methanol and diesel injection can be completed at the same time through an ECU, an Elman neural network is adopted to predicate a crank signal pulse width in an online manner, according to the predicated pulse width and the output torque, the number of stopped cylinders and the corresponding cylinder numbers controlled by methanol injection cylinder stopping are determined under the dual-fuel mode, and random cylinder stopping of methanol injection in the dual-fuel running mode can be achieved. In the dual-fuel mode, according to the real-time work state of an engine, the mixed burning ratio is dynamically calculated, the methanol injection strategy is selected, multi-point injection of methanol and diesel can be achieved, and stable efficient running of the dual-fuel engine is ensured.

Description

technical field [0001] The invention belongs to the field of automobile engines, and in particular relates to the control of methanol-diesel dual-fuel engines. Background technique [0002] Diesel engines are widely used for their excellent power, economy and reliability, but the ebb and flow of NOx and soot emissions restrict the development of diesel engines. Methanol is an oxygenated fuel with a high octane number, which can improve combustion, reduce pollutant emissions, and has low deployment cost and good versatility. It is considered to be a promising clean alternative fuel. Methanol-diesel dual fuel is refitted on the basis of a diesel engine. Usually, one needs to install a methanol supply system, including methanol tanks, oil pumps, pipelines and methanol injectors; the other needs to install an electronic control system , used to control the injection of methanol and diesel. The conversion cost of methanol-diesel dual fuel is low and easy to implement. The meth...

AI Technical Summary

Problems solved by technology

This follow-up dual-combustion controller has data transmission delay and truncation error. At the same time, most of the original ECU control program codes are not open source, and the specific implementation method is unknown, let alone modified; the control of the actuator by the alcohol injection controller and the original ECU is coordinated. As a result, the dual-fuel mode control method is limited and the accuracy is reduced

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