Numerical analysis to influence of turbocharging and cylinder diameter enlargement on piston transverse movement

The analytical model was established based on piston dynamics and average Reynolds equations and then solved by Broyden method. The piston transverse movement characteristics were analysed according to the improved design of 6105 engine in which the explosive pressure was augmented by 38% and the cylinder diameter was enlarged from 105 mm to 110 mm. The piston top eccentricity and transverse velocity peak value are enlarged by 23% and 22% in the improved design, respectively, which increase the possibility of scraping cylinder. The piston transverse acceleration peak value is raised by 38%, which brings about stronger shock to cylinder. These results will give an effective direction to perfection of product design of internal combustion engine.