Abstract:
an internal combustion engine, valve timing is an important design
parameter which affects many engine performance parameters. In this
study , engine specifications were applied to the DIESEL-RK program
to test engine exhaust performance and emissions and the results were
there is a reduction in engine performance by de-creasing the Exhaust
valve opening (EVO) angle Before bottom dead centre BBDC at all
engine speeds and an increase of Oxides of Nitrogen (NOx) emissions
and the effect of Exhaust valve closing (EVC) reduction is beneficial to
Power, Brake Mean Effective Pressure (BMEP), and Specific Fuel
Consumption (SFC) for different speed and also will reduce engine
Oxides of Nitrogen (NO) and Carbon Monoxide (CO) emission down to
20° .
