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Combined effect of external mixture formation and cooled exhaust gas recirculation on engine performance and emissions characteristics of partially pre‐mixed charged compression ignition engine
Author(s) -
Bhurat Swapnil S.,
Pandey Shyam,
Chintala Venkateshwarlu
Publication year - 2020
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.13470
Subject(s) - exhaust gas recirculation , homogeneous charge compression ignition , materials science , automotive engineering , inlet manifold , compression ratio , diesel engine , thermal efficiency , ignition system , cylinder , carbureted compression ignition model engine , suction , diesel cycle , internal combustion engine , combustion , chemistry , combustion chamber , thermodynamics , mechanical engineering , engineering , physics , organic chemistry
The present experimental study was aimed to investigate the combined effect of external mixture formation and cooled exhaust gas recirculation (EGR) on performance and emissions characteristics of partially homogeneous charge compression ignition (PCCI) engine. A conventional single‐cylinder four‐stroke compression ignition engine was modified to operate on PCCI mode with the supply of diesel fuel vapor via intake manifold during suction stroke. A Homogenous air‐fuel charge was produced by using a retrofit system to provide fuel vapor. The engine was operated in two modes, direct injection (DI)‐EGR and PCCI (DI‐fuel vapor‐EGR) mode, and then results were compared with DI (conventional) mode. Constant 10% EGR was maintained during DI‐EGR and PCCI modes. Compared to conventional mode, in PCCI mode at full engine load, NO x and smoke opacity were decreased by 2.39 g kW −1 hr −1 and 27% respectively, and the marginal penalty in HC and CO emissions by 0.4 and 0.1 g kW −1 hr −1 was observed. Brake thermal efficiency was slightly reduced by 2.5% compared to DI mode.