Clutch To Clutch Shift Control

As can be seen in the solenoid valve layout below, there are major differences between the previous A/T and New A/T.

Fig 1: Identifying Major Differences Between Previous A/T And New A/T

Courtesy of HYUNDAI MOTOR CO.

In previous A/T, there were only two solenoid valves to enable shift and one solenoid valve to control hydraulic pressure which resulted in inaccurate shift and rough ride.

In the new A/T which is adopted for the EF and XG-Car, there are solenoid valves for each clutch & brake which enable control of both the disengaging and engaging clutch simultaneously for independent control. This system provides a much smoother shift and comfortable ride as well as preventing Engine run-up or clutch interlock. In addition to advanced shift feeling, the 1st gear is selected at the creep state for eliminating the shift shock during 2nd gear --> 1st gear.

Fig 2: Clutch To Clutch Shift Control Chart (1 Of 2)

Courtesy of HYUNDAI MOTOR CO.

Fig 3: Clutch To Clutch Shift Control Chart (2 Of 2)

Courtesy of HYUNDAI MOTOR CO.