公开(公告)号：US20090223495A1

公开(公告)日：2009-09-10

申请号：US11873601

申请日：2007-10-17

申请人： Eiichiro OHATA ,  Shiro Yamaoka ,  Yoshihiro Sukegawa ,  Hiroaki Hoshika ,  Kaori Kashio

发明人： Eiichiro OHATA ,  Shiro Yamaoka ,  Yoshihiro Sukegawa ,  Hiroaki Hoshika ,  Kaori Kashio

IPC分类号： F02M25/07 ,  F02B47/08

CPC分类号： F02D41/0055 ,  F02D41/0072 ,  F02D41/187 ,  F02D41/22 ,  F02D2041/0067 ,  F02D2041/0075 ,  F02D2200/0414 ,  F02M26/25 ,  F02M26/43 ,  F02M26/44 ,  F02M26/47 ,  F02M26/48 ,  F02M26/49 ,  F02M2026/003 ,  Y02T10/47

摘要： A conventional technique performs valve close control of an EGR valve after an EGR-gas back flow is detected. Therefore, the conventional technique has a subject that, if an EGR-gas flow direction changes from forward flow to back flow, a back flow condition will last not only for a response delay time of a detector but also for the judgment time by calculation processing and the actuation time of the EGR control valve. There is provided a control apparatus of an EGR control valve, comprising: an EGR control valve which is provided in an exhaust gas recirculation passage to circulate exhaust gas of an combustion engine from an exhaust gas passage to an intake air passage; measurement means for measuring a flow rate of EGR gas flowing in the exhaust gas recirculation passage; and control means for receiving an input from the measurement means and closing the EGR control valve if the EGR-gas flow rate is smaller than a predetermined threshold value when the EGR gas is flowing from the exhaust side to the intake side of the internal combustion engine.

摘要翻译： 在检测到EGR气体回流之后，常规技术对EGR阀进行阀关闭控制。 因此，现有技术的一个主题是，如果EGR气体流动方向从正向流向后向流动，逆流条件不仅对于检测器的响应延迟时间而且对于通过计算处理的判断时间也将持续 以及EGR控制阀的启动时间。 提供了一种EGR控制阀的控制装置，包括：EGR控制阀，其设置在废气再循环通道中，以使内燃机的废气从排气通道循环到进气通道; 用于测量在废气再循环通道中流动的EGR气体的流量的测量装置; 以及控制装置，用于在EGR气体从排气侧流向内燃机的进气侧时，如果EGR气体流量小于预定阈值，则从测量装置接收输入并关闭EGR控制阀 。

公开(公告)号：US20080178853A1

公开(公告)日：2008-07-31

申请号：US11943047

申请日：2007-11-20

申请人： Shiro YAMAOKA ,  Eiichiro OHATA ,  Jun KUBO ,  Noboru TOKUYASU ,  Toshiki OTSUKI ,  Hiroaki HOSHIKA

发明人： Shiro YAMAOKA ,  Eiichiro OHATA ,  Jun KUBO ,  Noboru TOKUYASU ,  Toshiki OTSUKI ,  Hiroaki HOSHIKA

IPC分类号： F01N11/00 ,  F02M25/07 ,  F02D21/08 ,  F01N3/18

CPC分类号： F02D41/005 ,  F02B29/0406 ,  F02B2275/14 ,  F02D2041/0075 ,  F02M26/05 ,  F02M26/06 ,  F02M26/28 ,  F02M26/35 ,  F02M26/47 ,  F02M26/49 ,  Y02T10/47

摘要： The present invention prevents an EGR sensor installed in an engine's EGR path from being soiled by soiling substances in exhaust. A catalyst is positioned upstream of the EGR sensor to purify the soiling substances in EGR gas. The status of the EGR sensor is properly controlled in accordance with the conditions of the catalyst. This ensures the EGR sensor is less likely to be affected by the soiling substances in the exhaust under any circumstances of the EGR path and allows the EGR sensor to avoid a decrease in the accuracy of EGR gas detection. An alternative configuration may be employed such that the EGR gas recirculates from the downstream side of a catalyst installed in a main exhaust path.

摘要翻译： 本发明防止了安装在发动机EGR通路中的EGR传感器被污染排气中的物质所污染。 催化剂位于EGR传感器的上游，以净化EGR气体中的污物。 根据催化剂的条件适当地控制EGR传感器的状态。 这确保EGR传感器在EGR路径的任何情况下不太可能受到排气中的污染物质的影响，并且允许EGR传感器避免EGR气体检测的精度的降低。 可以采用替代配置，使得EGR气体从安装在主排气路径中的催化剂的下游侧再循环。

公开(公告)号：US20090000367A1

公开(公告)日：2009-01-01

申请号：US12146072

申请日：2008-06-25

申请人： Eiichiro OHATA

发明人： Eiichiro OHATA

IPC分类号： G01M15/10

CPC分类号： F02D41/0072 ,  F02B29/04 ,  F02D41/1448 ,  F02D41/1454 ,  F02M26/05 ,  F02M26/22 ,  F02M26/47 ,  Y02T10/47

摘要： In measurement methods and a measuring equipment for flow of exhaust gas re-circulation, in order to prevent performances of exhaust, fuel efficiency, and power output from deteriorating due to reasons such as large loss in pressure and time, a control delay during an excessive operation, and reduction in an exhaust gas re-circulation gas flow rate upon measuring an exhaust gas re-circulation gas flow rate, an exhaust gas re-circulation gas flow rate is measured by a plurality of measurement methods on the basis of an intake air flow rate and pressure before and after a heat exchanger installed at an exhaust gas re-circulation passage and the measurement methods are carried out by performing a mutual comparison of the measurement flow rates. Accordingly, it is possible to measure the exhaust gas re-circulation gas flow rate with high precise in a short response time without increasing loss in pressure, and thus to improve performances of exhaust, fuel efficiency, and power output.

摘要翻译： 在测量方法和废气再循环流量测量设备中，为了防止由于压力和时间损失等原因导致的排气性能，燃油效率和功率输出恶化，过度的控制延迟 操作，并且在排气再循环气体流量测量时废气再循环气体流量的降低，排气再循环气体流量通过多个测量方法基于进气测量 在排气再循环通道上安装的热交换器之前和之后的流量和压力，并且通过执行测量流量的相互比较来执行测量方法。 因此，可以在短的响应时间内高精度地测量废气再循环气体流量，而不会增加压力损失，从而提高废气的性能，燃料效率和功率输出。