Multi-Fidelity total integrated simulation technology for high pressure fuel pump with squeeze film effect

Paper #:
  • 2017-01-1325

Published:
  • 2017-03-28
Abstract:
The automotive fuel could be efficiently combusted by injecting it into the cylinders with high pressure to atomize it to pass the regulations of exhaust gas and fuel economy. For this reason, automotive companies have developed DI (Direct Injection) engines, which can inject gasoline into the cylinders directly and compress the pressure of the cylinder highly. Furthermore, the demand for lower-noise high pressure pumps is also increasing from the viewpoint of automotive comfort. Since the valve velocity and noise level will increase with the increase of the pressure in fuel pumps, noise issues need to be solved under the high pressure condition. Accordingly, the valve motion should be predicted with high accuracy under operating conditions for evaluating the noise caused by valve impingement. In addition, the squeeze film effect phenomenon, which is pressure increasing between two plates when the two plates become close enough, will occur in the physical fuel pumps. This phenomenon has effects on the prediction of the noise level caused by valve impingement. Therefore, we focused on the high pressure fuel pumps to develop MF (Multi-Fidelity) total integrated simulation technology. We couple 1D system analysis and 3D moving boundary analysis with squeeze film effect to predict the valve motion under operating condition in the MF technology. The valve motion and the boundary condition of 3D moving boundary analysis are predicted by 1D system analysis. The fluid force which acts on the valve is predicted by 3D moving boundary analysis in the MF technology. Finally, we could predict the valve deceleration phenomena by applying the MF technology to the high pressure fuel pumps.
Also in:
  • SAE International Journal of Passenger Cars - Mechanical Systems - V126-6EJ
  • SAE International Journal of Passenger Cars - Mechanical Systems - V126-6
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