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首页> 外文会议>Global Powertrain Congress on Advanced Engine Design amp; Performance vol.33; 20050927-29; Ann Arbor,MI(US) >Diesel Particulate Filter for Passenger Cars - Interaction between System Layout and Requirements for Calibration
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Diesel Particulate Filter for Passenger Cars - Interaction between System Layout and Requirements for Calibration

机译：乘用车柴油颗粒过滤器-系统布局和校准要求之间的相互作用

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摘要

In Europe more than 50% of new registered passenger cars, SUVs and light duty trucks are equipped with diesel engines. In some Asian countries, e.g. South Korea and India, and in the North American market as well, diesel vehicles are becoming more popular. However, to fulfill future vehicle emission and air quality regulations a particulate filter will become inevitable for all markets. Additive supported particulate filter systems have already been in series production on the European market since 2000. However, the accumulated ash in the particulate filter over its lifetime, originated mainly by the fuel borne additive itself, results in a limited life-span for the filter and, accordingly, in the necessity to replace the filter after 80,000 or 120,000 km. Catalyzed particulate filters without these additive systems have been on the market since 2004. Ash accumulation is no longer a problem with such systems, but the required exhaust gas temperature to start soot combustion inside the filter is substantially more than 100℃ higher than with an additive system. To reach such high exhaust gas temperatures of 600 to 650℃, it is necessary to significantly adjust combustion parameters in a modified engine calibration. Furthermore, in combination with a particulate filter, the oxidation catalyst not only must reduce HC and CO emissions, but also must provide an exhaust temperature increase through an exothermic reaction. The temperature increase by in-cylinder burning and by exothermic reaction has to be carefully controlled to guarantee safe operation and regeneration of the particulate filter under all ambient and operating conditions. At the same time, safe detection of soot loading, reduction of oil dilution, limitation of component stress and overall production spread has to be taken into account during calibration work. The requirements for the functionalities and the complexity of the above mentioned calibration tasks depend mainly on the system layout of the aftertreatment components. The arrangement of pre-catalyst, main-catalyst and particulate filter along the exhaust line influences significantly the conditions for and the stability of the filter regeneration under varying ambient and operating conditions. The following presentation shows different solutions for the ar- rangement of aftertreatment components, their benefits and disadvantages, and the resulting requirements for calibration. By experiments and simulation, the influence of component location, geometric data, specification of substrate, and insulation measures on regeneration conditions are pointed out. It is shown that by optimizing the system layout the calibration effort can be reduced and the risk of damage or insufficient life-span of the components can be minimized.
机译：在欧洲，超过50％的新注册乘用车，SUV和轻型卡车都配备了柴油发动机。在某些亚洲国家/地区韩国和印度以及北美市场上，柴油汽车也越来越受欢迎。然而，为了满足未来的车辆排放和空气质量法规，对于所有市场而言，微粒过滤器将成为必然。自2000年以来，添加剂支持的颗粒过滤器系统已在欧洲市场上批量生产。但是，颗粒过滤器在其整个使用寿命中的累积灰分（主要是由燃油中的添加剂本身产生的）导致过滤器的使用寿命有限因此，必须在80,000或120,000 km之后更换过滤器。自2004年以来，没有这些添加剂系统的催化颗粒过滤器就已投放市场。灰分堆积不再是此类系统的问题，但是开始在过滤器内部进行烟尘燃烧所需的废气温度比使用添加剂时高出100℃以上。系统。为了达到如此高的排气温度600至650℃，必须在修改后的发动机标定中显着调整燃烧参数。此外，与颗粒过滤器结合使用，氧化催化剂不仅必须减少HC和CO排放，而且还必须通过放热反应提高排气温度。必须小心控制因缸内燃烧和放热反应引起的温度升高，以确保在所有环境和运行条件下安全运行和微粒过滤器的再生。同时，在校准工作期间，必须考虑安全检测烟灰负荷，减少油稀释，限制部件应力和整个生产范围。对上述校准任务的功能和复杂性的要求主要取决于后处理组件的系统布局。沿着排气管线的前催化剂，主催化剂和颗粒过滤器的布置在变化的环境和操作条件下会显着影响过滤器再生的条件和稳定性。下面的演示显示了各种后处理组件的解决方案，它们的优缺点以及对校准的最终要求。通过实验和仿真，指出了元件位置，几何数据，基板规格和绝缘措施对再生条件的影响。结果表明，通过优化系统布局，可以减少校准工作，并使部件损坏或寿命不足的风险降到最低。

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