Tempering prevention and abnormal combustion restraining method of hydrogen fuel combustion engine
A technology of abnormal combustion and prevention method, which is applied in the direction of internal combustion piston engine, engine control, combustion engine, etc., to achieve the effect of taking into account both economy and power.
Inactive Publication Date: 2013-03-20
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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[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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[0031] In general, the backfiring of a hydrogen engine is closely related to the timing, duration and ignition timing of hydrogen injection. When hydrogen injection enters the intake manifold, if it encounters a hot spot near the valve, or the exhaust gas enters the intake manifold when the valve overlaps, it may cause the mixture to burn in the intake pipe and cause backfire. In response to this situation, a multi-channel hydrogen injection system is used to prevent the occurrence of abnormal combustion by using a combination of parallel hydrogen injection of the multi-channel hydrogen injection system, delayed hydrogen injection of the intake pipe, fixed hydrogen injection end time and delayed ignition. In this embodiment, the hydrogen injection system is three-way, the hydrogen injection system is supplied with hydrogen in separate ways, and each hydrogen injection system uses a single solenoid valve. The specific measures taken are as follows:
[0032] 1) According to the...
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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 part at 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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IPC IPC(8): F02D19/02
CPCY02T10/32Y02T10/30
Inventor 杨振中祁儒明郑俊强
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER