共查询到18条相似文献,搜索用时 703 毫秒
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车用电控柴油机瞬态过程控制是车用柴油机电子控制中的一项重要内容,结合电子控制的灵活恬,本文针对车用柴油机瞬态过程中的起步,加速和完全松开油门的减速等过程提出了相应的油量控制算法,并结合试验验证了这几方面瞬态控制的有效性。 相似文献
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<正>与传统柴油机相比,高压共轨柴油机具有以下优点:喷油压力的产生过程与喷油过程相互独立,喷油压力稳定;喷油始点和燃油喷射量的控制相互独立,可实现精确控制;最小稳定燃油喷射量极小,可以达到1 mL/次;喷油系统响应灵 相似文献
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潍柴WP国Ⅲ柴油机主要特点是采用了BOSCH公司的高压共轨喷油系统,其基本工作原理是柴油机上的传感器采集了转速、温度、压力的实时参数后输入ECU,ECU对来自传感器的信号与储存的参数值进行比较、运算,确定最佳运行参数,执行机构按照最佳参数对喷油压力、喷油量、喷油时间、喷油规律等进行控制,驱动喷油系统,使柴油机工作状态达到最佳。 相似文献
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提出了一个NOx排放量简化计算模型,用于对柴油机NOx排放的定性研究和实时排放控制,建立了柴油机排放控制模糊神经网络控制模型,实现了用喷油提前角和变截面涡轮开度2个调节量对NOx排放控制的策略,并在一台高速在喷式车用柴油机上进行了验证。 相似文献
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概述了柴油机电控喷油技术的发展、电控喷油系统的技术特点和分类;分析了各种电控喷油系统的优缺点,指出高压共轨系统以其结构紧凑,喷油压力的选择不受柴油机转速、负荷和燃油喷射量的影响,能实现喷油量、喷油定时和喷油率的灵活控制而成为未来柴油机燃油系统的主要发展方向。 相似文献
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Seungwoo Hong Donghyuk Jung Myoungho Sunwoo 《International Journal of Automotive Technology》2018,19(4):585-595
Fuel injection limitation algorithms are widely used to reduce particulate matter (PM) emissions under transient states in diesel engines. However, the limited injection quantity leads to a decrease in the engine torque response under transient states. To overcome this issue, this study proposes an adaptation strategy for exhaust gas recirculation (EGR) and common rail pressure combined with a fuel injection limitation algorithm. The proposed control algorithm consists of three parts: fuel injection limitation, EGR adaptation, and rail pressure adaptation. The fuel injection quantity is limited by adjusting the exhaust burned gas rate, which is predicted based on various intake air states like air mass flow and EGR mass flow. The control algorithm for EGR and rail pressure was designed to manipulate the set-points of the EGR and rail pressure when the fuel injection limitation is activated. The EGR controller decreases the EGR gas flow rate to rapidly supply fresh air under transient states. The rail pressure controller increases the rail pressure set-point to generate a well-mixed air-fuel mixture, resulting in an enhancement in engine torque under transient states. The proposed adaptation strategy was validated through engine experiments. These experiments showed that PM emissions were reduced by up to 11.2 %, and the engine torque was enhanced by 5.4 % under transient states compared to the injection limitation strategy without adaptation. 相似文献
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柴油机共轨电控燃油喷射技术 总被引:1,自引:0,他引:1
电子控制技术是车用柴油机燃油喷射系统发展的必然趋势,而目前开发的共轨电控燃油喷射系统是发展的主流,其分为高压共轨系统和中压共轨系统两类,本文介绍该两类系统的基本结构和原理,并阐述共轨系统的现状及发展方向。 相似文献
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