Robert Bosch Corporation

Aero-Twin wiper assembly system

Motorists almost everywhere depend on their windshield wipers for convenience and safety. Wipers have for the most part been unattractive and sometimes unreliable, being susceptible to wear and aerodynamic lift, often making them ineffective, sometimes when needed most. And historically, cowl design has needed to take account of the space they occupy as they sweep, or returned to their folded-down position.

A product of Bosch’s Center of Competence for wiper blade research in Tienen, Belgium, the new Aero-Twin windshield wiper blade assembly system changes all of that, with a new approach based on new design, materials, and manufacture. This innovative unit eliminates most of the superstructure of the conventional wiper, while providing enhanced durability, reduced weight, fewer parts, better wiping performance with less noise, and better aerodynamics for sweeping the glass at speed.

Performance is improved partly because the windshield is scanned, allowing manufacture of a wiper blade with a very low profile specifically matched to the curvature of the vehicle’s glass. Adhesion to the glass and appropriate “hinging” action when the blade reverses direction are accomplished by a uniquely extruded blade with an internal metal spine, which maintains the curvature required, and eliminates the need for conventional “claws” and wiper arm superstructure. The resulting low profile also improves styling and space required, even when the units are not in operation.

The Aero-Twin windshield wiper blade assembly is the first of its kind to be adopted as OEM equipment, by Mercedes-Benz, and by Volkswagen on all of its cars, and can be developed for any vehicle.