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Method and device for controlling abnormal combustion of hydrogen-fueled engine

A control method and abnormal combustion technology, applied in engine control, combustion engine, internal combustion piston engine, etc., can solve the problems of increased tempering, abnormal combustion of tempering, and pre-ignition of hydrogen-fueled engines, so as to suppress pre-ignition. , taking into account the dynamics and avoiding the effect of unfavorable factors

Inactive Publication Date: 2013-07-24
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a method and device for controlling abnormal combustion of a hydrogen fuel engine, so as to solve the contradiction between the pre-ignition of the existing hydrogen fuel engine, the abnormal combustion of backfire, the backfire of the hydrogen fuel engine and the improvement of power

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  • Method and device for controlling abnormal combustion of hydrogen-fueled engine
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  • Method and device for controlling abnormal combustion of hydrogen-fueled engine

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Embodiment 1

[0027] The technical scheme of the control method of the hydrogen fuel engine backfire of the present invention is as follows: when the hydrogen fuel engine backfires, adjust the ignition timing or adjust the ignition timing and the amount of water sprayed into the intake pipe in parallel and step by step according to the difference in the backfire intensity way to suppress tempering.

[0028] When the hydrogen engine is backfired, first calculate the backfire strength, and let the characterization function of the backfire strength be , where y represents the pressure intensity of the intake pipe; and then calculate the tempering inhibition degree, so that the characterization function of the tempering inhibition degree is , where x is the ignition timing, z is the water injection rate of the intake pipe; judge whether the tempering intensity is greater than the tempering intensity threshold value, if the tempering intensity is greater than the tempering intensity threshold...

Embodiment 2

[0031] The technical scheme of the control method for the abnormal combustion of the hydrogen fuel engine of the present invention is as follows; first, judge whether the hydrogen fuel engine has pre-ignition or backfire according to the collected pre-ignition and backfire signals; when the hydrogen fuel engine has pre-ignition, take Adjust the ignition timing to suppress pre-ignition; when the hydrogen fuel engine flashes back or pre-ignition and flashback occurs, adjust the ignition timing or adjust the ignition timing and the amount of water sprayed into the intake pipe according to the intensity of the flashback Parallel step-by-step way to suppress tempering.

[0032] When pre-ignition occurs in a hydrogen fuel engine, the pre-ignition intensity is calculated first, and the characterization function of the pre-ignition intensity is given as ,in Indicates the pressure intensity of the cylinder; then calculate the pre-ignition suppression degree, let the representation ...

Embodiment 3

[0039] The control device for the abnormal combustion of the hydrogen fuel engine of the present invention is as follows: figure 2 As shown, the device includes:

[0040] The sensor signal processing input circuit is used to send the pre-ignition and tempering signals detected by each sensor to the microprocessor through the input circuit, where the input signal includes analog signals and digital signals, and the analog signals pass through the processing circuit and then undergo A / D conversion Then it is sent to the microprocessor in the form of digital quantity, and the digital signal is directly sent to the microprocessor through the I / O interface;

[0041] Microprocessor (MC9S12DG256B), used for data processing, control calculation and logic judgment according to the input signal, to find out whether the hydrogen engine has pre-ignition and backfire, and send control pre-ignition and / backfire to the power drive output circuit through the interface instruction;

[00...

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Abstract

The invention relates to a method and a device for controlling the abnormal combustion of a hydrogen-fueled engine. The method of the invention for controlling the abnormal combustion of the hydrogen-fueled engine comprises the following steps: judging whether the hydrogen-fueled engine is pre-ignited and tempered or not according to acquired pre-ignition and tempering signals; when the hydrogen-fueled engine is pre-ignited, adopting a mode of regulating ignition timing to suppress the pre-ignition; and when the hydrogen-fueled engine is tempered or is pre-ignited and tempered, adopting the mode of regulating the ignition timing or the mode of regulating the ignition timing and the working water jet capacity of an intake pipe synchronously and in steps respectively according to different tempering strengths to suppress the tempering. Through the method, the hydrogen-fueled engine primarily ensures high economical efficiency when working under the working condition of low and moderate load and primarily ensures dynamic performance indexes when working under the working condition of large full-load; and the method has the advantages of effectively suppressing the abnormal combustion, such as the pre-ignition, the tempering and the like, fully developing the maximal advantages of the ignition timing and the water jet of the intake pipe and simultaneously taking the performance ofthe engine into account.

Description

technical field [0001] The invention relates to a method and device for controlling abnormal combustion of a hydrogen fuel engine. Background technique [0002] Hydrogen fuel has unique advantages in terms of energy and environmental protection, and is considered to be one of the most promising future leading fuels for automobile engines. However, due to the unique physical and chemical properties of hydrogen, hydrogen as an alternative fuel for engines is prone to premature ignition, backfire, etc. The problem of abnormal combustion is especially serious when the equivalence ratio is large; reducing the equivalence ratio will lead to a decrease in engine power. Therefore, controlling the abnormal combustion such as flashback and pre-ignition, and coordinating to solve the contradiction between abnormal combustion and improving the power of hydrogen fuel engine are the key to promote the technological progress of hydrogen engine. [0003] The intake pipe flashback means tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D43/00F02B43/12
CPCY02T10/32Y02T10/30
Inventor 杨振中王丽君张庆波孙永生苗芸
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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