Reaction triangle
The reaction triangle is a part that is used to guide the rigid rear axle of an automobile on some wheel suspensions . The name is used by Alfa Romeo .
The task of the reaction triangle is to guide the rear axle sideways and, together with the lower trailing arms, to absorb the acceleration and braking forces. The reaction triangle is a wishbone that is attached to the chassis at two points and to the axle with a ball joint. In the Alfa Romeo models, such as the Giulia , the handlebars were screwed to the front left and right of the body and at the rear (to save construction height) to the differential housing with rubber bearings.
Such wishbones can also be found in the Ford Corcel , Dacia 1300 , Renault 12 and the derived vehicles Renault 15 , 17 and 18 . The axle tube of the non-driven rear axle is angled slightly upwards to accommodate the rubber mount in the middle.
BMW introduced a similar suspension (with transverse arms instead of trailing arms at the bottom) in 1935 with the 326 and used it until the BMW 501/502 . That's why they are also available from EMW and Bristol .
On the De Dion axle of the large Opel models , the wishbone was directed backwards. This works against brake diving ; At the front the handlebars would have been in the way of the differential suspended from the floor of the car.
On the Ford Cortina Lotus, the reaction triangle was hinged to the bottom of the differential housing.
The same principle works with the rear axle suspension of the Ford Taunus TC / Cortina Mk III and the Leyland P76 , where the triangle is divided into two individual diagonal bars that are hinged to the left and right of the differential housing.
The so-called sliding block axle was developed for Alfa Romeo for use in sports. Instead of a wishbone, the axle is guided in a rail with a sliding block .
