Abstract: This invention relates to a control unit for a vehicle having a steering wheel and is constituted by a box provided with vehicle accessory control and checking means. The control members several types of manually operable switches arranged and disposed for operation by a driver while his hands remain on the steering wheel, the switches being recognizable by touch.

Abstract: A speed limiter device for an automobile vehicle having a combustion engine comprising an air intake manifold provided with a throttle member manual control of the accelerator pedal type which acts on the opening of the throttle member and a connecting member between these opening devices and the throttle member. The limiter device comprises apparatus sensitive to a speed parameter of the vehicle for producing a speed signal, a comparator to compare this signal with a predetermined limit, and an amplifier for the signal supplied by the comparator. The amplifier controls a drive which is sensitive to the suction in the intake manifold and acts on the throttle member so as to keep the value of the speed parameter at the predetermined limit when the limiter device is engaged. The connecting member between the opening control and the throttle member has a substantially constant length when the limiter device is not engaged and a variable length when the limiter device is engaged.

Abstract: A drum angularly entrained via a magnetic coupling by a shaft of a vehicular transmission, against a spring force, is linked via another magnetic coupling with a coaxial follower member carrying a printed circuit whose conductors are engageable by respective contact brushes normally spaced therefrom, the brushes acting as brakes upon being moved into contact with the conductors so as to arrest the follower member. An alarm device, which may emit a warning sound and/or carry out a control function, responds to a photoelectric sensor including a light emitter and a light receiver on the follower member coacting with a shutter on the drum, the sensor actuating the alarm device upon a relative displacement of the follower member and the drum beyond a selected relative angular position. A pushbutton, serving to bring the brushes into contact with the printed-circuit conductors, simultaneously connects the alarm device to its power supply.