A control device for a vehicle motor

A control device (110) for a vehicle engine (105) comprises a memory unit (130) for storing engine configuration parameters, a processing unit (120) for sending control signals to the engine in accordance with the configuration parameters, and an input/output unit (140-150) connectible to an external computer (155) in order to modify the configuration parameters; the control device includes a first portion (130a) and a second portion (130b) of the memory unit, each portion being usable alternatively in an active state for storing a current version of the configuration parameters or in an inactive state for the writing of a new version of the configuration parameters, the processing unit accessing the portion which is in the active state, for reading, and the input/output unit accessing the portion which is in the inactive state, for writing, and means (210-240) for selectively switching one of the portions to the active state and the other of the portions to the inactive state.