Tempering prevention and abnormal combustion restraining method of hydrogen fuel combustion engine

Abstract

The invention relates to a tempering prevention and abnormal combustion restraining method of a hydrogen fuel combustion engine, a prevention method uses at least two ways of hydrogen spraying devices to spray hydrogen, and the hydrogen spraying devices adopt a sectional operating mode to spray hydrogen; when the hydrogen spraying devices spray hydrogen at the early stage, an intake valve is opened to delay some time to spray n; and the terminal time of the hydrogen spraying is fixed on the moment of starting closing the intake valve. The tempering prevention method decay time spraying hydrogen of the hydrogen fuel combustion engine provided by the invention has the advantages of avoiding hydrogen spraying from happening in a valve overlap at the air inflow starting moment, reducing the residence time of the hydrogen in an intake tube as far as possible, and reducing the litten probability of a gas mixture and reducing the probability of the tempering through an air inflow cooling inlet manifold internal hot point; fixing the hydrogen spraying manner of each way of most length hydrogen spraying extended period no matter what load size, and ensuring not to close to the overlap partat the open front end of the inlet valve at the starting moment of each way of hydrogen spraying; and effectively preventing the tempering, combining the adjusting ignition, and effectively restraining abnormal combustion.

Description

technical field [0001] The invention relates to a backfire prevention and abnormal combustion suppression method of a hydrogen fuel internal combustion engine, belonging to the technical field of hydrogen internal combustion engine control. Background technique [0002] With its unique advantages in energy and environmental protection and its good performance in vehicles, hydrogen fuel is considered to be the most promising leading fuel for future vehicle engines, and developed countries attach great importance to it. Due to the obvious difference in the physical and chemical properties of hydrogen fuel and petroleum fuel, the formation and combustion of the mixture gas in the hydrogen engine is organized by the intake pipe type low-pressure hydrogen injection system, which is more prone to pre-ignition and backfire. Pre-ignition refers to the phenomenon that the hydrogen-air mixture is ignited by the hot spot in the cylinder before it is ignited and starts to burn. The pre-...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a hydrogen fuel internal combustion engine backfire prevention and abnormal combustion suppression method to solve the problem of effectively preventing and suppressing the abnormal combustion of the hydrogen fuel engine such as pre-ignition and backfire, and taking into account the power and economy of the optimized engine

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