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Mixed fuel homogeneous charge compression ignition (HCCI) engine combustion timing estimation method based on LSTM

A mixed fuel and combustion timing technology, which is applied to combustion engines, internal combustion piston engines, engine control, etc., can solve the problems that the measurement accuracy cannot be solved, and the advantages cannot be fully utilized.

Active Publication Date: 2019-12-10
CHONGQING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the measurement accuracy cannot be solved, the advantages of HCCI cannot be fully utilized

Method used

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  • Mixed fuel homogeneous charge compression ignition (HCCI) engine combustion timing estimation method based on LSTM
  • Mixed fuel homogeneous charge compression ignition (HCCI) engine combustion timing estimation method based on LSTM
  • Mixed fuel homogeneous charge compression ignition (HCCI) engine combustion timing estimation method based on LSTM

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Embodiment Construction

[0059] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0060] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should...

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Abstract

The invention relates to a mixed fuel homogeneous charge compression ignition (HCCI) engine combustion timing estimation method based on LSTM, and belongs to the field of HCCI engine combustion timingestimation. The method includes the steps that firstly, needed relevant variables are sampled, wherein the relevant variables comprise intake and exhaust valve closing timing, intake manifold temperature and pressure, mass of n-heptane and isooctane in mixed fuel, heat released by combustion of the mixed fuel in cylinders, the air-fuel ratio and engine rotating speed of an HCCI engine during operation; secondly, Z-score standardization, PCA dimensionality reduction and data segmentation are carried out on an input data set to obtain a final input data set; then the data set is imputed into atrained LSTM black box model, and model output is obtained; and finally, a final HCCI combustion timing estimation result is obtained by anti-standardization of the model output.

Description

technical field [0001] The invention belongs to the field of estimating combustion timing of a homogeneous charge compression ignition (Homogeneous Charge Compression Ignition, HCCI) engine, and relates to an LSTM-based method for estimating the combustion timing of a mixed fuel HCCI engine. Background technique [0002] In recent years, due to the introduction of nearly harsh emission standards, major automobile manufacturers are constantly innovating automobile technology in order to meet the requirements of emission standards. However, due to the inherent shortcomings of traditional engine combustion technology, its exhaust emissions still cannot meet the requirements degree of satisfaction. Therefore, it is still a daunting task to further reduce exhaust emissions by relying on conventional engine technology. Due to the advantages of significantly reducing pollution emissions and improving fuel utilization efficiency, the homogeneous charge compression ignition (HCCI) e...

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Application Information

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IPC IPC(8): F02D41/14
CPCF02D41/1405Y02T10/12
Inventor 郑太雄贺吉杨新琴张良斌杨萃侯晓康
Owner CHONGQING UNIV OF POSTS & TELECOMM