Framework Execution and Schematic of Jounce Bumper in Two-Wheeler Fork

Abstract

A two-wheeler fork connects the front wheel and the axle to its frame, via a pair of triple tree clamps. It typically incorporates the front suspension and front brake, which allows the front wheel to rotate about the steering axis so that the two-wheeler may be steered effectively. The front suspension is either hydraulic or pneumatic shock absorption type. The common type of the front suspension in motorcycle is telescopic forks which are now replaced by mono-shocks that gives a superior vehicle handling and provides safety while braking. The existing front fork suspension assembly consists of fork tubes, sliders, spring, damper rod, spacer, and gaiters to absorb and dampen the shock impulses. The front suspension contributes to the vehicle’s handling, thus providing safety and comfort by keeping the vehicle’s passengers comfortably isolated from bumps, vibration, and road noise. The objective of our work is to enhance the overall suspension efficiency of the front suspension system by introducing jounce bumper (bump stopper) between the spring and damper rod. The jounce bumper is a polymeric component usually made of polyurethane that can improve the noise, vibration, and harshness performance of the entire vehicle. Polyurethane is known for its low density, flexibility, and resistance to fatigue. Hence with the added absorption capacity of the jounce bumper, the effects of front suspension will get enhanced, which will result in reduction in noise, vibration, and harshness (NVH) leading to improved ride quality and vehicle handling.