NVH Optimization of the 1.2L DIATA Engine

Gomes, Enio; Breida, M.; Kley, Philipp; Ratliff, Mark A.

doi:10.4271/1999-01-1744

Cited by 6 publications

(1 citation statement)

References 3 publications

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“…Finite element techniques are frequently employed in evaluating the dynamic response of well-defined engine designs; see, for example, [1][2][3][4][5][6][7][8][9]. The finite element models require detailed geometric and material data of the engine components, as well loading data defined by engine combustion forces (and possible coupling with the remainder of the powertrain).…”

Section: Introductionmentioning

confidence: 99%

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Dong

Perkins

2003

Multibody System Dynamics

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The equations of motion for the major components in an internal combustion engine are developed herein using a recursive formulation. These components include the (rigid) engine block, pistons, connecting rods, (flexible) crankshaft, balance shafts, main bearings, and engine mounts. Relative coordinates are employed that automatically satisfy all constraints and therefore lead to the minimum set of ordinary differential equations of motion. The derivation of the equations of motion is automated through the use of computer algebra as the precursor to automatically generating the computational (C or Fortran) subroutines for numerical integration. The entire automated procedure forms the basis for an engine modeling template that may be used to support the up-front design of engines for noise and vibration targets. This procedure is demonstrated on an example engine under free (idealized) and firing conditions and the predicted engine responses are compared with results from an ADAMS model. Results obtained by using different bearing models, including linear, nonlinear, and hydrodynamic bearing models, are discussed in detail.

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