Continuously variable transmission

A transmission comprising:

• a transmission input shaft;
• a transmission output shaft;
• a ratio varying unit having a rotating first side and a rotating second side;
• an epicyclic gear arrangement comprising a first member which can be driven by a first side of the ratio varying unit, a second member which can be driven by the second side of the ratio varying unit, a third member, and a fourth member which can be driven by the transmission input shaft;
• a first clutch arrangement configured to driveably couple the first member to the output shaft;
• a second clutch arrangement configured to driveably couple to second member to the output shaft;
• a third clutch arrangement configured to driveably couple the third member to the output shaft.

A transmission comprising:

• a transmission input shaft;
• a transmission output shaft;
• a ratio varying unit having a rotating first side and a rotating second side, the rotational axes of the first and second sides being coaxial;
• an epicyclic gear set comprising a first input arranged to he driven by the transmission input shaft, a second input arranged to be driven by a first side of the ratio varying unit, and a third input arranged to be driven by the second side of the ratio varying unit;
• a first drive mode in which the speed of the transmission output is proportional to the speed of the first side of the ratio varying unit, and
• a second drive mode in which the speed of the transmission output is proportional to the speed of the second side of the ratio varying unit,
• wherein, at one particular speed operating ratio of the ratio varying unit, the ratio of the speed of the transmission output shaft to the speed of the transmission input shaft is the same in both the first and second drive modes.