METHOD OF DETERMINING IF AN OXIDATION CATALYST IS QUENCHED OR IS NOT QUENCHED
    1.
    发明申请
    METHOD OF DETERMINING IF AN OXIDATION CATALYST IS QUENCHED OR IS NOT QUENCHED 有权
    如果氧化催化剂被猝灭或未被检测,则确定方法

    公开(公告)号:US20120240553A1

    公开(公告)日:2012-09-27

    申请号:US13052355

    申请日:2011-03-21

    IPC分类号: F01N3/023

    摘要: A temperature of exhaust gas downstream of an oxidation catalyst is compared to a temperature of the exhaust gas upstream of the oxidation catalyst to determine if the downstream temperature is increasing over time or decreasing over time as hydrocarbons are injected into the flow of exhaust gas to regenerate a particulate filter. The oxidation catalyst is determined to be quenched when the temperature of the exhaust gas downstream of the oxidation catalyst remains constant or decreases over time as the rate at which the hydrocarbons are injected into the exhaust gas increases. The oxidation catalyst is determined to not be quenched when the temperature of the exhaust gas downstream of the oxidation catalyst increases over time as the rate at which the hydrocarbons are injected into the exhaust gas increases.

    摘要翻译: 将氧化催化剂下游的废气的温度与氧化催化剂上游的排气的温度进行比较,以确定随着时间的流逝,下游温度是否随着时间的推移而增加,或者随着时间的推移而降低,因为碳氢化合物被注入废气流中以再生 微粒过滤器。 当氧化催化剂下游的废气的温度保持恒定时,随着时间的推移,氧化催化剂被确定为淬火,因为烃被注入废气中的速率增加。 当氧化催化剂下游的废气的温度随着时间的推移而增加时,氧化催化剂被确定为不被淬火。

    OXIDATION CATALYST OUTLET TEMPERATURE CORRECTION SYSTEMS AND METHODS
    4.
    发明申请
    OXIDATION CATALYST OUTLET TEMPERATURE CORRECTION SYSTEMS AND METHODS 有权
    氧化催化剂出口温度校正系统和方法

    公开(公告)号:US20100269489A1

    公开(公告)日:2010-10-28

    申请号:US12427930

    申请日:2009-04-22

    IPC分类号: F01N3/00 F01N3/10 F01N3/035

    摘要: A temperature control system comprises a temperature determination module, a temperature correction module, a temperature control module, and an updating module. The temperature determination module determines a desired outlet temperature for an oxidation catalyst (OC) that is located upstream of a particulate filter (PF) in an exhaust system. The temperature correction module determines a temperature correction from a plurality of temperature corrections. The temperature control module controls an outlet temperature of the OC based on the desired outlet temperature and the temperature correction. The updating module selectively updates at least one of the plurality of temperature corrections when an engine speed and an engine load are within respective predetermined ranges.

    摘要翻译: 温度控制系统包括温度确定模块,温度校正模块,温度控制模块和更新模块。 温度测定模块确定位于排气系统中微粒过滤器(PF)上游的氧化催化剂(OC)的期望出口温度。 温度校正模块根据多个温度校正来确定温度校正。 温度控制模块根据所需的出口温度和温度校正来控制OC的出口温度。 当发动机速度和发动机负载在相应的预定范围内时,更新模块选择性地更新多个温度校正中的至少一个。

    Apparatus and Method for Optimizing Exhaust Temperature Control in a Vehicle During Particulate Filter Regneration
    5.
    发明申请
    Apparatus and Method for Optimizing Exhaust Temperature Control in a Vehicle During Particulate Filter Regneration 有权
    在颗粒过滤器过滤器中优化车辆排气温度控制的装置和方法

    公开(公告)号:US20100083639A1

    公开(公告)日:2010-04-08

    申请号:US12244976

    申请日:2008-10-03

    IPC分类号: F01N9/00

    摘要: A method controls an exhaust gas temperature from a vehicle engine during regeneration of particulate filter (PF) in a vehicle having an oxidation catalyst (OC) and a selective catalytic reduction catalyst (SCR). The method ensures that a final OC temperature does not exceed a maximum of the target OC outlet temperature and a calibrated maximum OC outlet temperature. An apparatus for controlling a temperature of the exhaust gas includes sensors for measuring a temperature within the exhaust system and a controller having an algorithm, an OC temperature lookup table, and a PF temperature lookup table. The algorithm calculates a target OC outlet temperature using the lookup tables and a delayed error value that compensates for a thermal mass of the SCR. Actual OC outlet temperature is limited during regeneration of the PF to the lesser of the target OC outlet temperature and a calibrated maximum OC outlet temperature.

    摘要翻译: 在具有氧化催化剂(OC)和选择性催化还原催化剂(SCR)的车辆中的微粒过滤器(PF)的再生期间,一种方法控制来自车辆发动机的废气温度。 该方法确保最终OC温度不超过目标OC出口温度的最大值和校准的最大OC出口温度。 用于控制废气温度的装置包括用于测量排气系统内的温度的传感器和具有算法,OC温度查找表和PF温度查找表的控制器。 该算法使用查找表和用于补偿SCR的热质量的延迟误差值来计算目标OC出口温度。 在PF再生期间OC实际出口温度受限于目标OC出口温度较小者和校准的最大OC出口温度。