Development of an Intake Air Temperature Estimation Method for Transient Control of Diesel Engines. (First Report) - Proposal of an Intake Air Temperature Estimation Formula for Steady-State Operation -
ディーゼルエンジンの過渡制御のための吸気温度推定手法の開発 －（第１報）定常運転における吸気温度の推定式の提案－
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- Publication code
- 20264609
- Paper/Info type
- JSAE Transaction
Vol.57 No.5
- Pages
- 916-922(Total 7 p)
- Date of publication
- Sep 2026
- Publisher
- JSAE
- Language
- Japanese
Detailed Information
| Category(J) | 論文 Translation |
|---|---|
| Category(E) | Paper |
| Author(J) | 1) 稲垣 和久, 2) 上野 彰孝, 3) 菅野 翼, 4) 西尾 健 |
| Author(E) | 1) Kazuhisa Inagaki, 2) Akitaka Ueno, 3) Tsubasa Sugano, 4) Takeshi Nishio |
| Affiliation(J) | 1) (株)豊田中央研究所, 2) (株)豊田自動織機, 3) トヨタ自動車(株), 4) (株)豊田自動織機 |
| Abstract(J) | 最新のコモンレール式ディーゼルエンジンでは，多段燃料噴射により騒音と排出ガスを制御している．パイロット噴射の最適化には吸気温度予測が重要であり，本研究では吸気バルブ閉時の筒内温度Tivcを定義し，定常運転での予測式を提案．Tivcはインマニ温度・冷却水温・出力の線形和で推定可能で，シミュレーション結果は実験と一致し，式の妥当性が確認された Translation |
| Abstract(E) | In the latest common rail injection system diesel engines, combustion is controlled to meet emission regulations while suppressing combustion noise to the desired level by using multi-stage fuel injection into the cylinder. In such combustion control using multi-stage injection, predicting the intake air temperature is extremely important for optimizing pilot injections. In this study, as Step 1, we define the in-cylinder gas temperature at the time of intake valve closure as Tivc and propose a prediction formula for Tivc during steady-state operation that can be calculated onboard. Next, as Step 2, we develop a method to modify the prediction formula from Step 1 to accommodate transient operation. In this report, as Step 1, we considered the effect of heat exchange temperature with the combustion chamber wall during the intake stroke based on the Woschni formula. As a result, it was clarified that Tivc can be estimated as a linear sum of three components: intake manifold gas temperature, coolant temperature, and engine output. Furthermore, using the Tivc formula identified from actual engine tests, we predicted the heat release rate using the 0-dimensional cycle simulation UniDES developed by our company. The ignition timing of the pilot under various operating conditions from cold to warm matched well with the experiments, supporting the validity of the proposed formula. |
