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1.发明授权
公开(公告)号：US4240254A
公开(公告)日：1980-12-23
申请号：US894432
申请日：1978-04-07
CPC分类号： F01N3/222 , F01N13/011 , F01N3/22 , F01N3/227 , F01N3/32 , F01N3/34 , F01N2330/06 , F01N2330/08 , F01N2430/06 , F02B1/04 , Y02T10/20 , Y02T10/22
摘要： An exhaust gas purifying apparatus having an exhaust pipe divided into at least two branches each connected to a different cylinder or cylinders. Each of the exhaust pipe branches is further connected to a secondary air supply tube to intermittently supply secondary air upstream of a three-way catalyst disposed in the branch thereby to vary periodically within a range the air-fuel ratio of exahust gases flowing into the three-way catalyst.
摘要翻译： 一种废气净化装置，其具有分为至少两个分支的排气管，每个分支连接到不同的气缸或气缸。 每个排气管分支进一步连接到二次空气供应管，以间歇地在设置在分支中的三通催化剂的上游供应二次空气，从而在流入三流的超燃气体的空燃比的范围内周期性地变化 - 催化剂。
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公开(公告)号：US4216653A
公开(公告)日：1980-08-12
申请号：US868313
申请日：1978-01-10
摘要： An exhaust gas purifying system of the type utilizing a three-way catalyst containing an oxygen storage material includes an electronic control unit for controlling the amount of secondary air supplied to the exhaust system of an internal combustion engine. The electronic control unit receives a signal from an exhaust air-fuel ratio sensor indicative of an air-fuel ratio of the exhaust gases and provides a pulse signal to an electromagnetic valve disposed in the passage of the secondary air leading to the upstream of the three-way catalyst. The amount of secondary air supplied to the exhaust system is controlled such that the resultant exhaust gases having an exhaust air-fuel ratio greater than the stoichiometric ratio and those having an exhaust air-fuel ratio smaller than the stoichiometric ratio are alternately supplied to the three-way catalyst thereby to achieve the average exhaust air-fuel ratio to fall within the optimum purifying conditions of the three-way catalyst.
摘要翻译： 使用含有储氧材料的三元催化剂的排气净化系统包括用于控制供给到内燃机的排气系统的二次空气量的电子控制单元。 电子控制单元接收来自表示排气的空燃比的排气空燃比传感器的信号，并且向设置在通向三通的上游的二次空气通过的电磁阀提供脉冲信号 - 催化剂。 控制供给到排气系统的二次空气的量，使得具有大于化学计量比的排气空燃比的合成排气和排气空燃比小于化学计量比的排气交替地供给到三 从而使平均排气空燃比落入三元催化剂的最佳净化条件。
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公开(公告)号：US4199938A
公开(公告)日：1980-04-29
申请号：US863579
申请日：1977-12-22
CPC分类号： F01N3/222 , F01N3/22 , F01N3/227 , F01N3/30 , F01N3/32 , F01N3/34 , F01N2330/06 , F01N2330/08 , F02B1/04 , Y02T10/20 , Y02T10/22
摘要： A method of operating a three-way catalyst which contains an oxygen storage material and which is mounted on the exhaust system of an internal combustion engine is disclosed. In order to operate the three-way catalyst effectively, the air-fuel ratio of the mixture supplied to the engine is set to be richer than the stoichiometric ratio, and secondary air is intermittently supplied by an air pump into the exhaust system upstream of the three-way catalyst, thereby to alternately vary the air-fuel ratio of the exhaust gases supplied to the three-way catalyst to become rich and lean with respect to the stoichiometric ratio.
摘要翻译： 公开了一种操作含有储氧材料并安装在内燃机的排气系统上的三元催化剂的方法。 为了有效地操作三元催化剂，供给到发动机的混合物的空燃比被设定为比化学计量比更浓，二次空气由空气泵间歇地供给到排气系统的上游 从而交替地改变供给到三元催化剂的废气的空燃比相对于化学计量比变浓和稀。
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公开(公告)号：US4192268A
公开(公告)日：1980-03-11
申请号：US30953
申请日：1979-04-17
CPC分类号： F02D41/1481 , F02M23/04 , F02B1/04 , Y02T10/146
摘要： An air flow amount adjusting system produces an air-fuel mixture of a desirable air-fuel ratio by controlling the direction of movement of a bypass valve mounted in an additional air supply pipe adapted to supply additional air into either the intake system or exhaust system of an internal combustion engine in accordance with an output signal produced from a gas sensor mounted in the exhaust system of the engine and indicative of the air-fuel ratio of the mixture supplied to the engine. A two-level mode signal whose threshold corresponds to the desired air-fuel ratio is produced in accordance with the output signal of the gas detector. After the two-level mode signal has changed from one level to the other level, the movement of the bypass valve is stopped for a certain period of time. If desired, the stopping period of the bypass valve may be changed in accordance with the temperature of the engine.
摘要翻译： 空气流量调节系统通过控制安装在附加空气供应管中的旁通阀的运动方向来产生期望空燃比的空气 - 燃料混合物，该附加空气供应管适于将额外空气供应到进气系统或排气系统 根据从安装在发动机的排气系统中的气体传感器产生的输出信号的内燃机，其指示供应给发动机的混合物的空燃比。 根据气体检测器的输出信号产生阈值对应于所需空燃比的两电平模式信号。 在双电平模式信号从一个电平变化到另一个电平之后，旁路阀的运动停止一段时间。 如果需要，可以根据发动机的温度来改变旁通阀的停止时段。
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公开(公告)号：US4140093A
公开(公告)日：1979-02-20
申请号：US792768
申请日：1977-05-02
申请人： Tadashi Hattori , Akira Takata , Tamotsu Fukuda , Takamichi Nakase , Toyota Jidosha Kogyo Kabushiki Kaisha
发明人： Tadashi Hattori , Akira Takata , Tamotsu Fukuda , Takamichi Nakase , Toyota Jidosha Kogyo Kabushiki Kaisha
CPC分类号： F02D41/1482 , F02B1/04
摘要： An air-fuel ratio controlling system for an internal combustion engine including a control circuit for controlling, in accordance with a detected air-fuel ratio, the operation of a drive motor of a control valve mounted in an additional air supply passage. The control circuit includes a timing pulse generator for generating timing pulses synchronized with a running speed of the engine and thus the control valve is intermittently rotated by a predetermined amount in response to the timing pulses. By increasing the frequency of the timing pulses during the periods of rapid acceleration and deceleration, a response to the change in the engine speed is further improved.
摘要翻译： 一种用于内燃机的空燃比控制系统，包括控制电路，该控制电路根据检测到的空燃比控制安装在附加空气供应通道中的控制阀的驱动电动机的操作。 控制电路包括定时脉冲发生器，用于产生与发动机的运行速度同步的定时脉冲，因此控制阀响应于定时脉冲间歇地旋转预定量。 通过在快速加速和减速期间增加定时脉冲的频率，进一步提高对发动机转速变化的响应。
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公开(公告)号：US4106451A
公开(公告)日：1978-08-15
申请号：US782748
申请日：1977-03-30
CPC分类号： F02D41/1482
摘要： An air-fuel ratio adjusting system controls the amount of additional air supply through the bypass passage of the carburetor to ensure optimum engine operation even in a warming up condition of the engine. The air-fuel ratio adjusting system includes an air-fuel ratio sensor disposed in the exhaust manifold, a warm-up sensor for detecting the temperature of engine cooling water or engine block, and a control unit for providing a control signal to a driving motor for the bypass valve. The bypass valve is controlled so that the air-fuel ratio of the mixture becomes the stoichiometric one and at the same time, during the warming up condition, the maximum opening of the bypass valve is limited to a predetermined degree depending on the temperature of the engine.
摘要翻译： 空燃比调节系统控制通过化油器的旁通通道的附加空气供给量，以确保即使在发动机的预热状态下发动机的最佳运转。 空燃比调节系统包括设置在排气歧管中的空燃比传感器，用于检测发动机冷却水或发动机缸体的温度的预热传感器，以及用于向驱动电动机提供控制信号的控制单元 用于旁通阀。 控制旁通阀使得混合物的空燃比变为化学计量比，同时在升温状态下，旁通阀的最大开度根据温度的不同而被限制在预定的程度 发动机。
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公开(公告)号：US4052968A
公开(公告)日：1977-10-11
申请号：US605175
申请日：1975-08-15
IPC分类号： F02D41/14 , F02D43/00 , F02M7/12 , F02M7/133 , F02M23/04 , F02D1/04 , F02B15/00 , F02D33/00 , F02D35/00
CPC分类号： F02D43/00 , F02D41/1441 , F02D41/1488 , F02M23/04 , F02M7/133 , Y02T10/146
摘要： A carburetor for applying air-fuel mixture to an internal combustion engine includes a main passage for applying air-fuel mixture and principally controlling the amount thereof.The air-to-fuel ratio of the air-fuel mixture to be supplied to the engine is detected by an air-to-fuel ratio detector mounted in an exhaust pipe of the engine, and when the detected ratio is lower than a stoichiometrically optimum air-to-fuel ratio for perfect combustion of the air-fuel mixture additional air is supplied to the main passage through a bypass passage, the amount of which is controlled by a bypass valve mounted in the bypass passage.An intake air pressure detecting device is mounted in an intake pipe of the engine, and when the detected pressure (absolute pressure) in the intake pipe becomes higher additional fuel is supplied to the main passage through an auxiliary fuel jet provided in the carburetor.
摘要翻译： 用于向内燃机施加空气 - 燃料混合物的化油器包括用于施加空气 - 燃料混合物并主要控制其量的主通道。
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公开(公告)号：US4051817A
公开(公告)日：1977-10-04
申请号：US556953
申请日：1975-03-10
CPC分类号： F02D41/182 , F02D41/345 , Y02T10/44
摘要： There is provided a fuel injection system for an internal combustion engine comprising fuel injection means provided for each of the cylinders of the engine, a main computing circuit for determining the timing of the injection and the duration of the injection in accordance with the charging and discharging of electric energy corresponding to the number of revolutions of the engine and the quantity of air drawn thereinto and generating pulse signals, a distribution circuit for distributing the pulse signals to the fuel injection means, and a reference signal generating circuit for generating an electric signal to complete the charging of electric energy in the main computing circuit within 720.degree./(2 .times. the number of cylinders) of crank travel, whereby the construction of the system is simplified since there is no need to modify in any way the conventional fuel injection valves or the like and provide the main computing circuit for each of the cylinders, and moreover fuel can be separately injected into each cylinder in turn in accordance with the firing order of the engine.
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公开(公告)号：US4164914A
公开(公告)日：1979-08-21
申请号：US783429
申请日：1977-03-31
CPC分类号： F02M23/04 , F02D35/003 , Y02T10/146
摘要： An apparatus for controlling the air-fuel ratio of an air-fuel mixture to be supplied into a combustion chamber of an internal combustion engine comprises a passage bypassing a carburetor and a throttle valve of the engine for supplying an additional air into the engine intake duct downstream of the throttle valve to dilute the air-fuel mixture to an air-fuel ratio most suited for the engine operation. An air valve is provided in the bypass passage to vary the air-flow cross-sectional area of the passage. The opening of the air valve is controlled mainly in accordance with the air-fuel ratio of the mixture as detected by an air-fuel ratio detector in the path of flow of engine exhaust gases. A variable orifice is provided in the bypass passage downstream of the air valve and defined by a valve seat and a needle valve operatively associated therewith to vary the opening area of the orifice. The needle valve is actuated by a pneumatic valve actuator which is responsive to variations in the engine manifold vacuum. The arrangement is such that the pressure difference across the air valve is kept substantially constant whereby the supply of the additional air is substantially in proportion to the engine intake air and free from influence by the engine manifold vacuum.
摘要翻译： 用于控制供给到内燃机的燃烧室中的空气燃料混合物的空燃比的装置包括绕过化油器的通道和用于向发动机进气管道中供应附加空气的发动机的节气门 在节流阀的下游，将空气 - 燃料混合物稀释到最适合发动机运转的空燃比。 在旁通通道中设置有空气阀，以改变通道的气流横截面积。 主要由发动机废气流动路径中的空燃比检测器检测出的混合气的空燃比主要控制空气阀的开度。 在空气阀下游的旁通通道中设置可变孔口，并由阀座和与其可操作地相关联的针阀限定，以改变孔口的开口面积。 针阀由气动阀致动器致动，该致动器响应发动机歧管真空度的变化。 这种布置使得跨越空气阀的压力差保持基本恒定，由此附加空气的供应基本上与发动机进气成正比并且不受发动机歧管真空的影响。
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公开(公告)号：US4079711A
公开(公告)日：1978-03-21
申请号：US742990
申请日：1976-11-18
CPC分类号： F02D41/1482
摘要： In an air-fuel ratio controlling device which comprises an exhaust gas sensor for detecting the air-fuel ratio of mixture and an additional air passage including a bypass valve and disposed to supply additional air to the downstream side of the throttle valve of an engine, the controlling device further comprises a throttle sensor operatively connected to the throttle valve for producing an output signal corresponding to the opening of the throttle valve, and a control circuit responsive to the signal from the throttle sensor whereby a predetermined time period after the occurrence of a change in the opening of the throttle valve is discriminated as the acceleration or deceleration period of the engine and the bypass valve is driven at one or the other of two speed depending on whether the engine is in the accleration/deceleration operating condition or other operating conditions.
摘要翻译： 在一种空燃比控制装置中，包括用于检测混合物的空燃比的排气传感器和包括旁通阀的附加空气通道，并且设置成向发动机的节流阀的下游侧提供附加空气， 所述控制装置还包括可操作地连接到所述节流阀的节气门传感器，用于产生对应于所述节流阀的打开的输出信号;以及控制电路，其响应来自所述节气门传感器的信号，从而在发生所述节流阀之后的预定时间段 根据发动机是否处于加速/减速操作状态或其它运行状态，判别出发动机的加速或减速时间和旁通阀以两个速度的一个或多个的速度驱动， 。
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