ABSTRACT
The vehicle transmission regulates the transfer of power (torque and speed) from the power plant (prime mover) to the driveline and the wheels. In the case of hybrid vehicles, the transmission becomes even more complex than conventional or electric vehicles with two or more prime movers (inputs) and an output to the driveline/wheels. In the design and analysis of the transmission systems, two major factors should be considered, first the degree of freedom (DOF). For example, a typical manual gearbox can have five degrees of freedom (or five different gear ratios). Second, the transmission topology defines the geometrical properties, spatial relations, and the ways that the gears are arranged.
