Evaluating the EGR-AFR Operating Range of a HCCI Engine
(2005) In SAE technical paper series- Abstract
- We present a computational tool to develop an exhaust gas recirculation (EGR) - air-fuel ratio (AFR) operating range for homogeneous charge compression ignition (HCCI) engines. A single- cylinder Ricardo E-6 engine running in HCCI mode, with external EGR is simulated using an improved probability density function (PDF)-based engine cycle model. For a base case, the in-cylinder temperature and unburned hydrocarbon emissions predicted by the model show a satisfactory agreement with measurements. Furthermore, the model is applied to develop the operating range for various combustion parameters, emissions and engine parameters with respect to the air-fuel ratio and the amount of EGR used. The model predictions agree reasonably well with the... (More)
- We present a computational tool to develop an exhaust gas recirculation (EGR) - air-fuel ratio (AFR) operating range for homogeneous charge compression ignition (HCCI) engines. A single- cylinder Ricardo E-6 engine running in HCCI mode, with external EGR is simulated using an improved probability density function (PDF)-based engine cycle model. For a base case, the in-cylinder temperature and unburned hydrocarbon emissions predicted by the model show a satisfactory agreement with measurements. Furthermore, the model is applied to develop the operating range for various combustion parameters, emissions and engine parameters with respect to the air-fuel ratio and the amount of EGR used. The model predictions agree reasonably well with the experimental results for various parameters over the entire EGR-AFR operating range thus proving the robustness of the PDF based model. The boundaries of the operating range namely, knocking, partial burn, and misfire are reliably predicted by the model. In particular, the model provides a useful insight into the misfire phenomenon by depicting the cyclic variation in the ignition timing and the in-cylinder temperature profiles. Finally, we investigate two control options, namely heating intake charge and trapping residual burned fraction by negative valve overlap. The effect of these two methods on HCCI combustion and CO, HC and NOdx emissions is studied. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1293892
- author
- Bhave, Amit ; Kraft, Markus ; Mauss, Fabian LU ; Oakley, Aaron and Zhao, Hua
- organization
- publishing date
- 2005
- type
- Contribution to specialist publication or newspaper
- publication status
- published
- subject
- in
- SAE technical paper series
- issue
- 2005-01-0161
- publisher
- Society of Automotive Engineers
- external identifiers
-
- scopus:85072447989
- ISSN
- 0148-7191
- language
- English
- LU publication?
- yes
- id
- 5e33888d-5389-4156-8ce5-6ed6c122c495 (old id 1293892)
- date added to LUP
- 2016-04-04 09:43:29
- date last changed
- 2022-03-15 20:39:55
@misc{5e33888d-5389-4156-8ce5-6ed6c122c495,
abstract = {{We present a computational tool to develop an exhaust gas recirculation (EGR) - air-fuel ratio (AFR) operating range for homogeneous charge compression ignition (HCCI) engines. A single- cylinder Ricardo E-6 engine running in HCCI mode, with external EGR is simulated using an improved probability density function (PDF)-based engine cycle model. For a base case, the in-cylinder temperature and unburned hydrocarbon emissions predicted by the model show a satisfactory agreement with measurements. Furthermore, the model is applied to develop the operating range for various combustion parameters, emissions and engine parameters with respect to the air-fuel ratio and the amount of EGR used. The model predictions agree reasonably well with the experimental results for various parameters over the entire EGR-AFR operating range thus proving the robustness of the PDF based model. The boundaries of the operating range namely, knocking, partial burn, and misfire are reliably predicted by the model. In particular, the model provides a useful insight into the misfire phenomenon by depicting the cyclic variation in the ignition timing and the in-cylinder temperature profiles. Finally, we investigate two control options, namely heating intake charge and trapping residual burned fraction by negative valve overlap. The effect of these two methods on HCCI combustion and CO, HC and NOdx emissions is studied.}},
author = {{Bhave, Amit and Kraft, Markus and Mauss, Fabian and Oakley, Aaron and Zhao, Hua}},
issn = {{0148-7191}},
language = {{eng}},
number = {{2005-01-0161}},
publisher = {{Society of Automotive Engineers}},
series = {{SAE technical paper series}},
title = {{Evaluating the EGR-AFR Operating Range of a HCCI Engine}},
year = {{2005}},
}