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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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公开(公告)号：US4177787A
公开(公告)日：1979-12-11
申请号：US815832
申请日：1977-07-14
IPC分类号： G01N27/04 , F02D41/14 , F02D45/00 , G01N27/26 , G01N27/409 , G01N27/417 , G01N33/00 , F02B75/10 , F02B77/08
CPC分类号： G01N27/4175 , F02D41/1441 , F02D41/1495 , G01N33/0031 , G01N33/007 , F01N2550/02
摘要： An apparatus for detecting a deteriorated condition of an oxygen concentration sensor mounted in an exhaust pipe for an internal combustion engine for controlling an air-fuel ratio is described. The apparatus includes, in addition to the sensor, a reference oxygen concentration sensor mounted in the exhaust pipe downstream of a cleaning device, and a discrimination unit for determining the deterioration of the oxygen concentration sensor for controlling the air-fuel ratio by measuring at least one of a duty factor and a period of an output signal from the reference oxygen concentration sensor.
摘要翻译： 描述了一种用于检测安装在用于控制空燃比的内燃机的排气管中的氧浓度传感器的劣化状况的装置。 除了传感器之外，该装置还包括安装在清洁装置下游的排气管中的参考氧浓度传感器，以及用于通过至少测量来确定用于控制空燃比的氧浓度传感器的劣化的判别单元 来自参考氧浓度传感器的占空因数和输出信号的周期之一。
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公开(公告)号：US4084558A
公开(公告)日：1978-04-18
申请号：US660976
申请日：1976-02-24
申请人： Tadashi Hattori , Takamichi Nakase
发明人： Tadashi Hattori , Takamichi Nakase
CPC分类号： F02D41/0005 , F02D41/1489 , Y02T10/42
摘要： An air-to-fuel ratio controlling system for an internal combustion engine is provided with a deceleration detector for detecting the deceleration operation of the engine. In response to a signal delivered from the deceleration detector, a control valve mounted in the adjusting air path is maintained at a given valve angle for a predetermined period of the deceleration. Air is, thus, additionally supplied through the adjusting air path during the deceleration, thereby to prevent unduely rich of the air-fuel mixture during the deceleration and to enable the control of the air-to-fuel ratio properly.
摘要翻译： 用于内燃机的空燃比控制系统设置有用于检测发动机的减速操作的减速检测器。 响应于从减速检测器传递的信号，安装在调节空气路径中的控制阀在预定的减速时间内保持在给定的阀角度。 因此，在减速期间通过调节空气路径另外供给空气，从而防止在减速期间空气 - 燃料混合物过多，并且能够适当地控制空气燃料比。
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14.发明授权
公开(公告)号：US4077207A
公开(公告)日：1978-03-07
申请号：US740174
申请日：1976-11-09
CPC分类号： F02D41/1482 , F02D43/00
摘要： An additional air control device for maintaining constant air-fuel ratio in an internal combustion engine wherein an intake air which is supplied additionally through a bypass passage to the engine is controlled by controlling the movement of a drive motor coupled to a control valve mounted in the bypass passage. A gas sensor for sensing the oxygen content of the exhaust gas and an intake air flow meter for sensing the rate of intake air flow to the engine are provided. In accordance with a signal from the gas sensor and an intake air flow signal representing a delay time factor from the intake air flow sensor, the drive motor is controlled to stop or drive alternately in a skip movement fashion in either an opening or closing direction of the control valve, and a rest period of the drive motor is determined to be inversely proportional to the intake air flow rate and a driving period which is subsequent to the rest period is set to a fixed time period, thereby an air-fuel ratio is maintained at a constant value and an exhaust gas emission is controlled.
摘要翻译： 一种额外的空气控制装置，用于在内燃机中保持恒定的空燃比，其中通过旁通通道另外供应到发动机的进气通过控制联接到安装在发动机中的控制阀的驱动马达的运动来控制 旁路通道 提供了一种用于感测废气氧含量的气体传感器和用于感测到发动机的进气流量的进气流量计。 根据来自气体传感器的信号和表示来自进气流量传感器的延迟时间因子的进气流量信号，控制驱动马达以跳过运动方式交替地停止或驱动， 控制阀和驱动电动机的停止时间被确定为与进气流量成反比，并且在休止期间之后的驱动期间被设定为固定时间段，从而空燃比为 维持在恒定值并且排放废气被控制。
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15.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：US4173957A
公开(公告)日：1979-11-13
申请号：US802311
申请日：1977-06-01
CPC分类号： F02D41/1482 , Y02T10/42
摘要： An additional air supply system for adjusting the air-fuel ratio of a mixture includes the improved control unit for actuating, at two different speeds, a drive motor of a bypass valve disposed in an additional air supply path. The control unit is provided with an air-fuel ratio discriminating circuit for generating high and low level signals by comparing a detected air-fuel ratio with the stoichiometric ratio, and an actuating circuit for producing pulse signals at each instant of inversion of the signal levels of the air-fuel ratio discriminating circuit in such that for a predetermined period from the instant of inversion a high frequency pulse signal is produced and then a low frequency pulse signal is produced for the remaining period until the next inversion. Since the pusle signals having two different frequencies are applied to the drive motor of the bypass valve, the bypass valve is drived at a fast speed to a predetermined amount of opening or closing and then moved slowly until the next inversion of the signal level.
摘要翻译： 用于调节混合物的空燃比的另外的空气供应系统包括改进的控制单元，用于以两种不同的速度驱动设置在附加空气供应路径中的旁通阀的驱动马达。 控制单元设置有用于通过将检测到的空燃比与化学计量比进行比较来产生高电平和低电平信号的空燃比鉴别电路，以及用于在信号电平的每个反转时刻产生脉冲信号的致动电路 空燃比鉴别电路，在从反转时刻开始的规定期间，产生高频脉冲信号，然后产生低频脉冲信号，直至下一次反转为止。 由于具有两个不同频率的消息信号被施加到旁通阀的驱动电动机，旁通阀以快速的速度被驱动到预定的开启或关闭量，然后缓慢地移动直到信号电平的下一个反转。
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公开(公告)号：US4121548A
公开(公告)日：1978-10-24
申请号：US814122
申请日：1977-07-08
IPC分类号： F02D41/14 , G01N27/417 , G01N33/00 , F02B3/00
CPC分类号： F02D41/1441 , F02D41/1495 , G01N27/4175 , G01N33/0006 , F01N2550/02
摘要： A deteriorated condition detecting apparatus for an oxygen concentration sensor used in an air-fuel ratio feedback control for an internal combustion engine comprises a reference oxygen concentration sensor mounted in proximity to the oxygen concentration sensor used for the air-fuel ratio feedback control and a discriminator for comparing duty factors of output signals from those two sensors to determine a deteriorated condition of the oxygen sensor. The discriminator determines the deteriorated condition when the duty factor of the sensor under test deviates from the duty factor of the output signal of the reference sensor by a predetermined amount. It converts the outputs of the respective sensors to square wave signals and integrates one of the levels of the square wave signals to determine the duty factors, and differentially amplifies the integrated signal to produce a differential output signal, which is then compared with a predetermined level to determine whether there exists a deviation of the duty factor corresponding to the deteriorated condition.
摘要翻译： 用于内燃机的空燃比反馈控制中使用的氧浓度传感器的劣化条件检测装置包括安装在用于空燃比反馈控制的氧浓度传感器附近的基准氧浓度传感器和鉴别器 用于比较来自这两个传感器的输出信号的功率因数，以确定氧传感器的劣化状况。 当测试传感器的占空因数偏离参考传感器的输出信号的占空比预定量时，鉴别器确定恶化条件。 它将各个传感器的输出转换成方波信号，并且对方波信号的一个电平进行积分以确定占空因数，并差分放大积分信号以产生差分输出信号，然后将其与预定电平进行比较 以确定是否存在与劣化条件相对应的占空比的偏差。
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公开(公告)号：US4121546A
公开(公告)日：1978-10-24
申请号：US723050
申请日：1976-09-13
CPC分类号： F02D41/1475 , F02D41/1482 , F02M23/04 , F02B1/04 , Y02T10/146
摘要： An air-fuel ratio adjusting apparatus for an internal combustion engine employing a gas sensor whose electric characteristic changes rapidly at near the stoichiometric air-fuel ratio so as to maintain the air-fuel ratio of mixture at any desired air-fuel ratio other than the stoichiometric one. A bypass valve is mounted in a bypass passage for supplying additional air to the portion of the carburetor downstream of its throttle valve. In response to the sensed signal from the gas sensor mounted in the exhaust pipe, the bypass valve is opened or closed to increase or decrease the amount of additional air. Taking advantage of the fact that there exists a delay of a definite time period between the time of generation of a sensed signal from the gas sensor and the time that the sensed signal produces an effect on the excess air factor of the exhaust gases, by causing the opening and closing speeds of the bypass valve to differ from each other, it is possible to maintain the air-fuel ratio of mixture constant within a wide range of air-fuel ratios.
摘要翻译： 一种使用气体传感器的内燃机的空燃比调节装置，该气体传感器的电特性在理论空燃比附近迅速变化，以将混合气的空燃比保持在除 化学计量。 旁通阀安装在旁通通道中，用于向其节流阀下游的化油器部分提供额外的空气。 响应于来自安装在排气管中的气体传感器的感测到的信号，旁通阀被打开或关闭以增加或减少附加空气的量。 利用在气体传感器产生感测信号的时间与感测到的信号对废气的过量空气因子产生影响的时间之间存在一定时间段的延迟的事实，通过引起 旁通阀的打开和关闭速度彼此不同，可以使空气 - 燃料比的宽范围内的混合气体的空燃比保持恒定。
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