a system and method for engine braking

A system and method for braking a vehicle 12 having a variable compression ratio engine 14 and a compression braking system 16 is disclosed. The system 10 is adapted to utilise the variable compression ratio engine 14 and the compression braking system 16 in a synergistic manner to selectively control or vary the generated compression braking torque by utilising high and low compression modes of operation of the engine 14.