SHIFT CONTROL SYSTEM: System Description: Notes

To select the gear ratio that can give the driving force to meet driver's intent or vehicle situation, the vehicle driving condition such as vehicle speed or accelerator pedal position is detected and the most appropriate gear ratio is selected and the shifting method before reaching the speed is determined. The information is output to the primary pressure solenoid valve to control the line pressure input/output to the primary pulley, to determine the primary pulley (movable pulley) position and to control the gear position.

Fig 1: Primary Pulley Speed Versus Vehicle Speed Graph (Except For NISMO RS)
Courtesy of NISSAN NORTH AMERICA, INC.
The gear ratio is set for each position separately.