公开(公告)号：US20080172166A1

公开(公告)日：2008-07-17

申请号：US11961049

申请日：2007-12-20

申请人： Hiroyuki NAGAI ,  Yoshiyuki OOTAKE ,  Yasuji ISHIZUKA ,  Masaki KOGA

发明人： Hiroyuki NAGAI ,  Yoshiyuki OOTAKE ,  Yasuji ISHIZUKA ,  Masaki KOGA

IPC分类号： F02D41/00

CPC分类号： F02D41/1441 ,  F01N3/2006 ,  F01N3/2053 ,  F01N13/0093 ,  F01N2410/02 ,  F02D41/022 ,  F02D41/0235 ,  F02D41/045 ,  F02D41/1456 ,  F02D41/1488 ,  F02D41/1494 ,  Y02T10/26

摘要： An air-fuel ratio control apparatus is basically provided with an exhaust system, a pair of sensors and a controller. The exhaust system includes an exhaust channel having a main catalytic converter, a bypass channel having a bypass catalytic converter, and a valve mechanism disposed in the exhaust channel to switch a pathway for exhaust gas from the exhaust channel to the bypass channel. The sensors output signals indicative of air-fuel ratios of exhaust flowing in their respective channels. The controller has first and second air-fuel ratio control sections that control an engine air-fuel ratio based on outputs of the sensors, respectively. The controller has a control mode switching section that switches control from the first air-fuel ratio control section to the second air-fuel ratio control section after a prescribed interval of time has elapsed from when the valve mechanism is switched from a closed state to an open state.

摘要翻译： 空燃比控制装置基本上设置有排气系统，一对传感器和控制器。 排气系统包括具有主催化转化器，旁通催化转化器的旁通通道和设置在排气通道中的阀机构的排气通道，用于将排气通道的路径从排气通道切换到旁通通道。 传感器输出表示在其各自通道中流动的排气的空燃比的信号。 控制器具有分别基于传感器的输出来控制发动机空燃比的第一和第二空燃比控制部。 控制器具有控制模式切换部，该控制模式切换部在从阀机构从关闭状态切换到停止状态经过规定的时间间隔后，将控制从第一空燃比控制部切换到第二空燃比控制部 打开状态。

公开(公告)号：US20080172167A1

公开(公告)日：2008-07-17

申请号：US11961075

申请日：2007-12-20

申请人： Yoshiyuki OOTAKE ,  Yasuji ISHIZUKA ,  Masaki KOGA ,  Kenichi SATO

发明人： Yoshiyuki OOTAKE ,  Yasuji ISHIZUKA ,  Masaki KOGA ,  Kenichi SATO

IPC分类号： F02D41/00

CPC分类号： F02D41/1439 ,  F01N3/106 ,  F01N3/108 ,  F01N3/2053 ,  F01N2560/025 ,  F02D41/0245 ,  F02D41/1454 ,  F02D41/1494 ,  F02D2200/0418

摘要： An air-fuel ratio control apparatus is basically provided with an exhaust system, a first sensor and a controller. The exhaust system includes an exhaust channel with a main catalytic converter disposed therein, a bypass channel with a bypass catalytic converter disposed therein, and a valve mechanism disposed in the exhaust channel between the connection points of the exhaust channel to switch a pathway for exhaust gas from the exhaust channel to the bypass channel. The first sensor detects a property indicative of an air-fuel ratio of exhaust flowing in the exhaust channel at a point downstream of the valve mechanism. The controller adjusts an element temperature of the first sensor to a prescribed temperature or less during a prescribed interval of time from when the valve mechanism is switched from a closed state to an open state.

摘要翻译： 空燃比控制装置基本上设置有排气系统，第一传感器和控制器。 排气系统包括其中设置有主催化转化器的排气通道，设置有旁通催化转化器的旁通通道，以及设置在排气通道内的排气通道中的阀机构，用于切换废气通道 从排气通道到旁路通道。 第一传感器检测指示在阀机构下游的点处在排气通道中流动的排气的空燃比的特性。 控制器在将阀机构从关闭状态切换到打开状态的规定时间间隔内将第一传感器的元件温度调节到规定温度以下。