IMPACT OF VARIABLE INTAKE-VALVE-TIMING ON HOMOGENEOUS CHARGE COMPRESSION IGNITION (HCCI) ENGINE PARAMETERS | ||||
The International Conference on Applied Mechanics and Mechanical Engineering | ||||
Article 61, Volume 13, 13th International Conference on Applied Mechanics and Mechanical Engineering., May 2008, Page 246-256 | ||||
Document Type: Original Article | ||||
DOI: 10.21608/amme.2008.39314 | ||||
View on SCiNiTO | ||||
Authors | ||||
MAHROUS A-F. M.1; POTRZEBOWSKI A.2; WYSZYNSKI M. L.3; XU H. M.4; TSOLAKIS A.5; LUSZCZ P.2 | ||||
1Ass. Lecturer, Mechanical Power Engineering Dept., Menoufiya University, Shebin El-Kom, Egypt (On leave), PhD student, Mechanical Engineering Dept, University of Birmingham, UK. | ||||
2PhD student, Mechanical Engineering Dept, University of Birmingham, UK. | ||||
3Professor of Novel Vehicle Technology and Applied Thermodynamics, Mechanical Engineering Dept, University of Birmingham, UK. | ||||
4Reader in Automotive Engineering, Mechanical Engineering Dept, University of Birmingham, UK. | ||||
5Lecturer in Automotive Engineering, Mechanical Engineering Dept, University of Birmingham, UK. | ||||
Abstract | ||||
ABSTRACT The effects of variable intake-valve-timing on the gas exchange process and performance of a 4-valve direct injection HCCI engine were computationally investigated using a 1D fluid-dynamic engine cycle simulation code. A non-typical intake valve strategy was examined; whereby the intake valves were assumed to be independently actuated with the same valve-lift profile but at different timings. Using such an intake valves strategy, the obtained results showed a significant improvement of the engine parameters such as load and volumetric efficiency when compared with those of the typical intake-valve-timing case. Additionally, minimizing the pumping work penalty, and consequently improving the fuel economy, was shown as an advantage of using the non-typical intake-valve-timing with the timing of the early intake valve coupled with a symmetric degree of exhaust-valve-closing timing. | ||||
Keywords | ||||
HCCI engine; Variable valve timing; gas exchange process | ||||
Statistics Article View: 110 |
||||