気化器の空燃比応答特性に由来するエンジンの自励振動 : 第2報,リーンハンチングの支配パラメータと計算シミュレーション

概要

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The effect of operating parameters on the period and damping coefficient of the lean hunting phenomenon are analyzed for both the nonlinear system equations and the linearized equations. In the linear analysis, the normalized partial derivatives of the period and damping coefficient with respect to operating parameters are calculated to predict which parameter excites/suppresses the oscillation, and increases/decreases the period. In the nonlinear analysis, the time history and phase plane trajectory of the phenomenon are drawn from the numerical calculation. The linearized analysis can adequately predict the effect of each parameter on the period. However, with respect to the damping coefficient, the predictions made from the linearized analysis are not always adequate. The nonlinear numerical solution, being more reliable, verifies our understanding that the governor-engine system is susceptible to lean hunting under lean and slow air-fuel ratio response characteristics.
一般社団法人日本機械学会の論文
1993-02-25