Abstract
The authors have electromechanical transmissions (EMT) with two engines driving a single shaft. Such transmissions are under ever greater efforts of development in connection with the appearance of motor vehicles having combined power installations (thermal engine (TE) + electric motor (EM) + store of energy (SE). The result of research on two layouts of EMT are given: a serial layout of TE and EM, and a parallel layout: TE and EM connected bya matching gear (MG). The second layout has been studied in detail in the case of direct closure of power flows on the driven shaft, and a conclusion has been made in favor of closure through a differential. The differential closure transmission is preferable from the viewpoint of dynamics and makes EMT automation possible. The result of theoretical studies, design and experimental research are analyzed.