Effects of electromagnetic intake valve train on gasoline engine intake charging

Abstract

Electromagnetic intake valve train (EMIV) is capable of regulating the intake valve control parameters such as intake phase, valve lift and transitional time at any given operational condition, which provide an effective way to improve the performance of engine. So the engine model was established to research the intake quantity influenced by intake valve variables such as intake phase, valve lift, transitional time and single/double mode, then the maximum of intake charging and the related control parameters under different engine speeds were obtained; combined with power consumption of the EMIVs and pumping loss, the control parameters with higher efficiency were obtained to satisfy the intake quantity. The results show that by EMIVs, the intake changing of the engine can be significantly improved, especially at lower engine speed which the increase can be reached by 18.3%; what’s more, by optimized valve control parameters, the power consumption in the air charging process can be reduced under the same intake charging, for example, the power consumption of single valve model will decrease by 35.9% compared with the double valve model at 2000 rpm.