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首页> 外文会议>First Ricardo International Conference on Vehicle Systems Integration: The Way Ahead >DI-motronic MED7 for gasoline direct injection engines: control strategies and diagnosis
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DI-motronic MED7 for gasoline direct injection engines: control strategies and diagnosis

机译：用于汽油直喷发动机的DI-motronic MED7：控制策略和诊断

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This paper describes the main strategies of the advanced Motronic MED7 engine management system for gasoline direct injection. This concept supports all required operation modes e.g. stratified, homogeneous lean and semi stratified to meet the highest fuel savings provided by the customers GDI combustion concept. Coordinated with Bosch GDI-components this system offers the highest performance for the future emission standards ULEV, EUIII and EUIV and meets all EOBD-requirements. The main structure of this system is based on the engine torque and is coordinating all activities via torque and efficiencies. The different operating modes are coordinated by a special dynamic mode manager, which is able to select the optimal operating mode under all conditions. The aftertreatment concept is based on an exhaust catalyst system comprising a fast heated pre-catalyst for early HC-reduction and a main catalyst with a NO_x-adsorber and a TWC. The main tasks of the aftertreatment control are the NO_x- and SO_x-regeneration. The MED7 is using an extended diagnosis concept, which is monitoring not only the intake air-path but also the fuel-path. The scheduling of all important diagnosis functions is done by a new diagnosis system manager, which offers an advantage with a dynamic structure for easy calibration.
机译：本文介绍了用于汽油直喷的先进Motronic MED7发动机管理系统的主要策略。此概念支持所有必需的操作模式，例如分层，均质稀薄和半分层，以满足客户GDI燃烧概念提供的最高燃油节省。该系统与博世GDI组件配合使用，可为未来的排放标准ULEV，EUIII和EUIV提供最高的性能，并满足所有EOBD要求。该系统的主要结构基于发动机扭矩，并通过扭矩和效率协调所有活动。特殊的动态模式管理器可以协调不同的运行模式，该管理器能够在所有条件下选择最佳的运行模式。后处理概念基于排气催化剂系统，该系统包括用于早期HC还原的快速加热的预催化剂和带有NO_x吸附剂和TWC的主催化剂。后处理控制的主要任务是NO_x和SO_x的再生。 MED7使用扩展的诊断概念，该概念不仅监视进气路径，而且监视燃料路径。所有重要诊断功能的调度都由新的诊断系统管理器完成，它具有动态结构的优点，易于校准。

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