### Abstract

This paper presents an application of in-cylinder pressure for the compression heat transfer estimation. Based on some assumptions and the first law of thermodynamics, the state-space model for the compression process can be derived. This model consists of two state variables, namely, in-cylinder pressure and temperature. During the compression stroke, the heat transfer to, or from, the cylinder walls can be computed using the least squares regression. The identification results show that the proposed method can estimate the amount heat transfer and its direction. However, the proposed method should be improved for increasing the accuracy of the heat transfer estimation. For instance, the specific heat ratio for the in-cylinder pressure offset compensation varies with temperature and the in-cylinder temperature during compression is calculated precisely. Therefore, in the last section, we then also discuss the analysis methodology and possible ways for improvement of the heat transfer estimation method.

Language | English |
---|---|

Pages | 769-774 |

Number of pages | 6 |

Journal | IFAC-PapersOnLine |

Volume | 49 |

Issue number | 11 |

DOIs | |

State | Published - 2016 |

### Fingerprint

### Keywords

- compression model
- heat transfer
- In-cylinder pressure
- system identification

### ASJC Scopus subject areas

- Control and Systems Engineering

### Cite this

*IFAC-PapersOnLine*,

*49*(11), 769-774. DOI: 10.1016/j.ifacol.2016.08.112

**An Application of In-Cylinder Pressure for Compression Heat Transfer Estimation.** / Khajorntraidet, Chanyut; Ito, Kazuhisa.

Research output: Contribution to journal › Article

*IFAC-PapersOnLine*, vol. 49, no. 11, pp. 769-774. DOI: 10.1016/j.ifacol.2016.08.112

}

TY - JOUR

T1 - An Application of In-Cylinder Pressure for Compression Heat Transfer Estimation

AU - Khajorntraidet,Chanyut

AU - Ito,Kazuhisa

PY - 2016

Y1 - 2016

N2 - This paper presents an application of in-cylinder pressure for the compression heat transfer estimation. Based on some assumptions and the first law of thermodynamics, the state-space model for the compression process can be derived. This model consists of two state variables, namely, in-cylinder pressure and temperature. During the compression stroke, the heat transfer to, or from, the cylinder walls can be computed using the least squares regression. The identification results show that the proposed method can estimate the amount heat transfer and its direction. However, the proposed method should be improved for increasing the accuracy of the heat transfer estimation. For instance, the specific heat ratio for the in-cylinder pressure offset compensation varies with temperature and the in-cylinder temperature during compression is calculated precisely. Therefore, in the last section, we then also discuss the analysis methodology and possible ways for improvement of the heat transfer estimation method.

AB - This paper presents an application of in-cylinder pressure for the compression heat transfer estimation. Based on some assumptions and the first law of thermodynamics, the state-space model for the compression process can be derived. This model consists of two state variables, namely, in-cylinder pressure and temperature. During the compression stroke, the heat transfer to, or from, the cylinder walls can be computed using the least squares regression. The identification results show that the proposed method can estimate the amount heat transfer and its direction. However, the proposed method should be improved for increasing the accuracy of the heat transfer estimation. For instance, the specific heat ratio for the in-cylinder pressure offset compensation varies with temperature and the in-cylinder temperature during compression is calculated precisely. Therefore, in the last section, we then also discuss the analysis methodology and possible ways for improvement of the heat transfer estimation method.

KW - compression model

KW - heat transfer

KW - In-cylinder pressure

KW - system identification

UR - http://www.scopus.com/inward/record.url?scp=84991108402&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84991108402&partnerID=8YFLogxK

U2 - 10.1016/j.ifacol.2016.08.112

DO - 10.1016/j.ifacol.2016.08.112

M3 - Article

VL - 49

SP - 769

EP - 774

JO - IFAC-PapersOnLine

T2 - IFAC-PapersOnLine

JF - IFAC-PapersOnLine

SN - 2405-8963

IS - 11

ER -