عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Considering the world fuel crisis and need for more efficient internal combustion engines different fuel
consumption reduction methods has been developed. For this purpose several law and standards has been
adopted in our country. In this study XU7/L3 engine is one of Peugeot products which is Iran’s second most
produced engine has been chosen as case study. Using variable valve timing is one of fuel consumption reduction
methods that can be applied to the engine, in this method depending on engine operation condition,
inlet and exhaust valve timing change to enhance volumetric efficiency, fuel economy and engine performance.
In first part of the study all parts of the engine were modeled in GT-Power software, in next stage GTPower
was coupled with SIMULINK MATLAB which controls the input and output parameters. Putting
forward a suitable target function for brake specific fuel consumption (BSFC) optimum valve timing for the
engine was calculated for best fuel economy. And maximum achievable fuel economy using variable valve
timing in the engine was calculated. In the study newly invented method for model optimization in previous
studies was completed.