چكيده به لاتين
One of the main interests for automotive scientists is the emission reduction and fuel consumption optimization in the internal combustion engine. In this study, authors developed a computational method to determine the thermal behavior of a four cylinder engine during the warm-up and cool-down Phases. In this regard, the “Lumped Method” has been utilized. Using this method, the whole engine is divided into separate parts, each part is represented by a single “node”, each of which have a specific thermal properties. These node are connected to each other by a network of thermal resistors. Solving this circuit of resistors, using proper boundary and initial conditions results in thermal properties of each node over time. According to calculated thermal pattern for engine, it is shown that using intelligent cooling will result in reduction of warm-up time. Also in this study pattern for engine cool-down is determined so intelligent cooling can be utilized in order to more efficient and safer cool-down phase after turning off the engine.
