Energy recovery system for a vehicle driveline

A vehicle driveline comprising:

• a vehicle transmission configured to transmit drive between an engine and vehicle wheels;
• and
• a kinetic energy recovery system having an input which is coupled to the driveline between the engine and the motor vehicle transmission, the kinetic energy recovery system comprising:
• a flywheel and
• a continuously variable transmission for transferring drive between the flywheel and the vehicle driveline at a continuously variable CVT speed ratio, the continuously variable transmission comprising:
• a variator having a rotary variator input and a rotary variator output, the variator serving to transfer drive between the rotary variator input and the rotary variator output at a continuously variable variator speed ratio, and
• a shunt gear arrangement having a first rotary shunt input which is drivably coupled to the rotary variator input, a second rotary shunt input which is drivably coupled to the rotary variator output, and a shunt rotary output which is drivably coupled to the flywheel.