高壓共軌噴油器壓力波動與針閥響應(yīng)解耦分析
發(fā)布時間:2018-09-17 18:08
【摘要】:多次噴射過程中,不同噴射之間的相互影響導(dǎo)致循環(huán)噴油量的控制難度增大。建立了高壓共軌系統(tǒng)的AMESim仿真模型,通過數(shù)值仿真和試驗測試相結(jié)合的方法,揭示了噴油器內(nèi)部壓力波動和針閥開啟階段動作響應(yīng)的強耦合作用是導(dǎo)致主噴油量隨噴射間隔波動的根本原因,當(dāng)主噴油量基準值為60.0mm3時,其波動量最大可達3.6mm3。建立了共軌系統(tǒng)的無阻尼LC液力系統(tǒng)模型,通過對模型的分析,針對強耦合作用提出了減小噴油器內(nèi)部油道長徑比和盛油槽容積的解耦方法。對解耦方法的仿真試驗驗證表明,采用解耦方法后壓力波動和針閥響應(yīng)的耦合程度降低53%。
[Abstract]:In the process of multiple injection, the interaction between different injection leads to the difficulty of controlling the fuel injection. The AMESim simulation model of high voltage common rail system is established, and the method of numerical simulation and test is combined. It is revealed that the strong coupling between the pressure fluctuation inside the injector and the action response of the needle valve in the opening stage is the fundamental cause of the main fuel injection volume fluctuating with the injection interval. When the reference value of the main fuel injection quantity is 60.0mm3, the maximum fluctuation can reach 3.6 mm ~ 3. The undamped LC hydraulic system model of common rail system is established. Based on the analysis of the model, a decoupling method is proposed to reduce the length / diameter ratio and tank volume in the injector. The simulation results of decoupling method show that the coupling degree of pressure fluctuation and needle valve response is reduced by 53% after the decoupling method is adopted.
【作者單位】: 中國汽車技術(shù)研究中心數(shù)據(jù)資源中心;
【分類號】:TK423
本文編號:2246704
[Abstract]:In the process of multiple injection, the interaction between different injection leads to the difficulty of controlling the fuel injection. The AMESim simulation model of high voltage common rail system is established, and the method of numerical simulation and test is combined. It is revealed that the strong coupling between the pressure fluctuation inside the injector and the action response of the needle valve in the opening stage is the fundamental cause of the main fuel injection volume fluctuating with the injection interval. When the reference value of the main fuel injection quantity is 60.0mm3, the maximum fluctuation can reach 3.6 mm ~ 3. The undamped LC hydraulic system model of common rail system is established. Based on the analysis of the model, a decoupling method is proposed to reduce the length / diameter ratio and tank volume in the injector. The simulation results of decoupling method show that the coupling degree of pressure fluctuation and needle valve response is reduced by 53% after the decoupling method is adopted.
【作者單位】: 中國汽車技術(shù)研究中心數(shù)據(jù)資源中心;
【分類號】:TK423
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