Design and Analysis of Balancer Shaft at Inclined Position for a Single Cylinder Engine

At Present most of the engines are modified to have a considerable level of characteristics based on specific fuel consumption, low pollution, high thermal efficiency, economizing energy, and passenger comfort. The engine noise radiation and vibration are key problems in any single cylinder engine application. The main motive is to reduce first order unbalanced vibration in a single cylinder four stroke engine. Most of the study has proposed for the implementation of two balancer shafts in the engine, but less work is done about including the single balancer shaft. However, unbalance due to balancer shaft may induce transverse deformation in balancing shaft due to centrifugal force and also consume power to rotate it. This paper describes a methodology to design a unique balancing shaft at inclined position as a remedy for the reduction of vibration i.e. first order unbalanced force in given engine assembly configuration. The investigation focuses upon the implementation of a balancer shaft in a high-speed single cylinder engine for additional balancing and to find the suitable position, shape, and geometry of the balancer shaft. Multiple body simulation method is used for investigation and results are validated by the experimental measurements. Effect of use of a balancer shaft on vibration level and noise level is studied in detail. ANSYS software is used for stress and modal analysis.