Design and Analyis of Balancer Shaft for a Four Stroke Single Cylinder Diesel Engine

Abstract

Present Automotive Engines are obligated to have acceptable level of characteristics such as low pollution, low specific fuel consumption, high thermal efficiency, energy saving and passenger comfort. Engine noise, vibration and harshness are key issues in any automotive application. One of the chief role is of the first order unbalanced vibration in single cylinder four stroke engine configuration. Lot of work has been done for introduction of two balancer shafts in engine but less work is done including single balancer shaft. This paper describes detailed procedure for the design of single balancer shaft as a solution for the chief source of vibration i.e. first order unbalanced force in stated engine configuration. The paper focuses upon the introduction of balancer shaft in single cylinder engine to improve balancing and determine the exact location, mass and geometry of balancer shaft. Multi body simulation procedure is established and results are validated through experimental measurements. Influence of addition of balancer shaft on crankcase vibration is studied. The effectiveness of integration of balancer shaft is simulated in dynamic analysis software ADAMS. Modal analysis is carried to validate the design of the balancer shaft in ANSYS.