True Cause analysis of Turbocharger Intake Side Flange Leakage based on Computer-aided Engineering

For a certain type of direct injection turbocharged engine turbine inlet end compressed air outlet flange and inlet hard pipe flange combination surface leakage problem, finally through CAE simulation means, reproduce the flange combination surface in the engine work deformation and the sealing of the paper gasket, and ultimately to find the real reason for the leakage of the real reason, that is, temperature, pressure under the dual role of the flange combined with the extruded deformation of the flange, resulting in the paper gasket and its printed on the sealing silicone ring sealing margin is insufficient, resulting in real vehicle durability process occurred in the bad air leakage. The sealing margin of the paper gasket and the silicone ring printed on it was insufficient, resulting in poor air leakage during the endurance process of the actual vehicle. In order to improve the sealing performance of the flange bonding surface, the optimal improvement program was obtained from the flange deformation and sealing interference, which finally solved the problem of air leakage in the real vehicle and ensured the smooth mass production of the model.