About Speed Breaker Synthesis with No Deterioration of the Car Suspension

Abstract

On the roads, near pedestrian crossings or other areas of the road where cars speed reduction is required (schools, hospitals, markets, and dangerous curves), rectangular, trapezoidal or circular speed breaker shapes are placed. The paper analyzes the kinematics of vehicles passing over the speed breaker appreciating qualitatively/quantitatively the influence on vehicle dynamics. We use the analogy of the car in motion as cam follower in oscillation and the speed breaker as flat cam in translation. The authors propose a configuration of the speed breaker section to protect the car (especially the suspension) from unwanted shocks, without affecting the original purpose of speed reduction.