Engine control device
    2.
    发明授权
    Engine control device 失效
    发动机控制装置

    公开(公告)号:US06269634B1

    公开(公告)日:2001-08-07

    申请号:US09497431

    申请日:2000-02-03

    IPC分类号: F01N300

    摘要: An engine control device, which is adapted for an engine provided with an NOx-absorbing material arranged in an exhaust passage for absorbing NOx in an oxygen-rich atmosphere, and releasing NOx and absorbing sulfur content when the oxygen concentration drops, includes a discriminator for judging whether the amount of sulfur absorbed by the NOx-absorbing material has reached a prescribed quantity, and a reductant concentration controller which increases the temperature of the NOx-absorbing material by decreasing a quantity related to EGR ratio for desulfurizing the NOx-absorbing material based on the result of judgment made by the discriminator. When the quantity related to the EGR ratio is decreased, the temperature of exhaust gas increases. Consequently, the temperature of the NOx-absorbing material increases and the sulfur in the NOx-absorbing material is freed and released.

    摘要翻译: 一种发动机控制装置,其适用于设置有排气通道中的NOx吸收材料的发动机控制装置,用于吸收富氧气氛中的NOx,并且当氧浓度下降时释放NOx并吸收硫含量,包括用于 判断由吸收NOx的吸收材料吸收的硫的量是否达到规定量;还原剂浓度控制器,其通过减少与NOx吸收材料脱硫相关的EGR率来增加NOx吸收材料的温度, 根据鉴别人的判断结果。 当与EGR率相关的量减少时,废气的温度升高。 因此,吸收NO x的材料的温度升高,NOx吸收材料中的硫释放释放。