Abstract: The display device has a pair of liquid crystal, colour display units fitted to the dashboard of the vehicle to display information; a memory; a “track-ball” data selection unit adjacent to the gear lever; and a processing unit cooperating with the memory and the data selection unit, and controlling the display units. In particular, by means of the “track-ball” data selection unit, the driver of the vehicle may change and freely adapt to his own requirements information display parameters such as type, size, colour and style of representation, by selecting from a number of items in a menu shown on the display units and memorized in the memory.

Abstract: The idling speed of an internal combustion engine is regulated with the use of an electronic control unit arranged to generate a signal for correcting the ignition advance and a signal for varying the piloting of a solenoid valve provided in a duct which by-passes a throttle valve which controls the air supply to the engine. For this purpose, the electronic unit acquires the instantaneous speed of the engine and the air pressure in the inlet manifold by means of sensors. The electronic unit implements an LQI (linear-quadratic-integral) type of control based on a linear mathematical model of the engine.