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1. 发明授权

US4572149A Air/fuel ratio control system for an internal combustion engine 失效
标题翻译：用于内燃机的空燃比控制系统
公开(公告)号：US4572149A
公开(公告)日：1986-02-25
申请号：US601535
申请日：1984-04-18
申请人： Shumpei Hasegawa , Michitaka Shiraiwa , Sadatomo Tsuchiya
发明人： Shumpei Hasegawa , Michitaka Shiraiwa , Sadatomo Tsuchiya
IPC分类号： F02D41/14 , F02M7/133 , F02M23/04 , F02M23/08 , F02B3/00
CPC分类号： F02M23/08 , F02M23/04 , F02M7/133 , Y02T10/146
摘要： An air/fuel ratio control system for an internal combustion engine equipped with a three-way catalytic converter, comprises first and second fluid supply passages for supplying, for example, a secondary air or a supplemental fuel to the engine, and a flow control valve disposed in the first fluid supply passage for varying the amount of the secondary air or the supplemental fuel in accordance with a detected condition of the air/fuel ratio. An open/close valve is disposed in the second fluid supply passage for opening and closing the communication through the second fluid supply passage without regard to the air/fuel ratio signal and with a predetermined period which is shorter than a normal period of turning over of the air/fuel signal, thereby reducing the deviation of the actual air/fuel ratio from a central value of the air/fuel ratio control, to improve the efficiency of purification of emission by means of the three-way catalytic converter.
摘要翻译：一种配有三元催化转化器的内燃机的空燃比控制系统，包括用于向发动机供应例如二次空气或补充燃料的第一和第二流体供应通道，以及流量控制阀设置在第一流体供给通道中，用于根据检测到的空气/燃料比的变化来改变二次空气或补充燃料的量。在第二流体供给通道中设置有开/关阀，用于打开和关闭通过第二流体供给通道的连通，而不考虑空/燃比信号，并且具有比正常翻转周期短的预定时段空气/燃料信号，从而减少实际空气/燃料比与空气/燃料比控制的中心值的偏差，以通过三元催化转化器提高排放净化效率。

2. 发明授权

US4558682A Air intake side secondary air supply system for an internal combustion engine 失效
标题翻译：用于内燃机的进气侧二次空气供应系统
公开(公告)号：US4558682A
公开(公告)日：1985-12-17
申请号：US587743
申请日：1984-03-08
申请人： Shumpei Hasegawa , Michitaka Shiraiwa
发明人： Shumpei Hasegawa , Michitaka Shiraiwa
IPC分类号： F02M23/04 , F02M23/08
CPC分类号： F02M23/08 , F02M23/04 , Y02T10/146
摘要： An air intake side secondary air supply system for an internal combustion engine provided with an air/fuel ratio feedback control operation, comprises a pressure responsive air control valve which controls the communication through a secondary air supply passage, i.e., the amount of the air intake side secondary air supplied to the engine. A first control pressure for opening the air control valve and a second control pressure for closing the air control valve is alternately supplied to the air control valve in accordance with a detected state of the air/fuel ratio of the engine. The system is further provided with a device for respectively controlling the speed of the supply of the first and second control pressure, which in turn causes the variation of the speed of the air/fuel ratio control.
摘要翻译：具有空燃比反馈控制动作的内燃机的进气侧二次空气供给系统具有：压力响应空气调节阀，其控制通过二次空气供给通路的连通，即进气量供给发动机的二次侧空气。根据检测到的发动机的空燃比状况，将空气控制阀的第一控制压力和用于关闭空气控制阀的第二控制压力交替地供给到空气调节阀。该系统还设置有用于分别控制第一和第二控制压力的供给速度的装置，这进而导致空气/燃料比控制的速度的变化。

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