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1.发明授权
公开(公告)号：US4056932A
公开(公告)日：1977-11-08
申请号：US627334
申请日：1975-10-30
申请人： Koyo Nakamura , Hiroshi Sanbuichi
发明人： Koyo Nakamura , Hiroshi Sanbuichi
CPC分类号： F02D35/0061 , F02M3/09 , F02M7/24 , F02B1/04
摘要： With respect to an internal combustion engine equipped with a carburetor and a catalytic converter which requires to feed the engine with a stoichiometric air/fuel mixture, the control system is for regulating the air/fuel ratio produced in the carburetor and comprises an auxiliary air admitting passage connected to the fuel discharge passage of the carburetor in addition to a usual air bleed passage for the fuel discharge passage, an electromagnetic valve for controlling the admission of air into the auxiliary passage, an oxygen sensor disposed in the exhaust system upstream of the catalytic converter, and a control circuit for producing continual pulses at a frequency between 5 and 100 Hz. The widths of the individual pulses are increased gradually while the output of the oxygen sensor indicates the air/fuel ratio being below the stoichiometric ratio, and vice versa. The valve is opened as each pulse is applied thereto so that the air feed rate to the fuel in the fuel passage is momentarily augmented by admission of air into the auxiliary passage.
摘要翻译： 对于配备有化油器和催化转化器的内燃机，其需要将化学计量的空气/燃料混合物供给发动机，所述控制系统用于调节在化油器中产生的空气/燃料比，并且包括辅助空气进入 除了用于燃料排出通道的通常的排气通道之外，还连接到化油器的燃料排放通道的通道，用于控制空气进入辅助通道的电磁阀，设置在催化剂上游的排气系统中的氧传感器 转换器和用于产生频率在5和100Hz之间的连续脉冲的控制电路。 单个脉冲的宽度逐渐增加，而氧传感器的输出表示空气/燃料比低于化学计量比，反之亦然。 当每个脉冲施加到阀上时，阀被打开，使得通过进入辅助通道中的空气来使燃料通道中的燃料的空气供给速率瞬间增加。
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2.发明授权Coarse and fine air supply control for closed-loop controlled carbureted internal combustion engines 失效用于闭环控制的化油内燃机的粗细和精细的空气供应控制
公开(公告)号：US4303049A
公开(公告)日：1981-12-01
申请号：US55396
申请日：1979-07-06
CPC分类号： F02D35/0061 , F02M7/24
摘要： In a closed loop air-fuel mixture control system for carburetor-equipped internal combustion engines, an exhaust gas sensor provides a feedback signal to a control unit where the signal is modified to meet the control characteristics of the closed loop. The modified feedback signal is converted into digital pulses whose width varies with the amplitude of the feedback signal. Additional air is supplied to the engine through an air bleed in accordance with the magnitude of the analog feedback signal to provide a coarse control of air-fuel ratio and in response to the digital pulses to provide a fine control of the ratio. The mixture is controlled in a wide range of ratios to eliminate the need for calibration which would be required for fitting the closed loop system to the time-varying characteristics of individual carburetors.
摘要翻译： 在用于装载化油器的内燃机的闭环空气燃料混合物控制系统中，排气传感器向控制单元提供反馈信号，其中信号被修改以满足闭环的控制特性。 修改的反馈信号被转换成数字脉冲，其宽度随着反馈信号的幅度而变化。 额外的空气根据模拟反馈信号的大小通过排气被提供给发动机，以提供空燃比的粗略控制，并且响应于数字脉冲以提供比率的精确控制。 将混合物控制在较宽的比例范围内，以消除将闭环系统安装到单个化油器的时变特性所需的校准。
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3.发明授权
公开(公告)号：US4873641A
公开(公告)日：1989-10-10
申请号：US68942
申请日：1987-07-01
申请人： Hatsuo Nagaishi , Yasuo Seimiya , Hideyuki Tamura , Hiromichi Miwa , Hiroshi Sanbuichi , Masaaki Uchida , Toshio Takahata
发明人： Hatsuo Nagaishi , Yasuo Seimiya , Hideyuki Tamura , Hiromichi Miwa , Hiroshi Sanbuichi , Masaaki Uchida , Toshio Takahata
CPC分类号： F02D41/18 , F02D41/045 , F02D41/2496
摘要： The throttle valve position of an engine is sensed and the effective cross sectional area of the induction passage is determined via table look-up. The table is recorded in terms of three parameters. The value thus derived is divided by the engine speed of alternatively a product of the engine speed and the engine displacement. A basic air induction quantity is then determined via table look-up and is subsequently modified using a correction coefficient to allow for the effect of engine speed on the same. The effect of injector position (viz., multi-point injection/single point injection) and/or the provision of a swirl control valve can be additionally taken into consideration via the use of suitable algorithms or additional two and three parameter system tables. If an idle control by-pass passage is provided, the effect of the opening degree is considered when determining the effective cross-section of the induction passage.
摘要翻译： 检测发动机的节气门位置，并通过表查找来确定感应通道的有效截面面积。 该表以三个参数记录。 这样得到的值除以发动机转速和发动机排量的乘积的发动机转速。 然后通过表查找确定基本的空气感应量，并且随后使用校正系数进行修改以允许发动机转速对其的影响。 可以通过使用合适的算法或附加的两个和三个参数系统表来额外考虑喷射器位置（即多点喷射/单点喷射）和/或提供旋流控制阀的效果。 如果提供怠速控制旁通通道，则在确定进气通道的有效截面时考虑开度的影响。
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公开(公告)号：US5009210A
公开(公告)日：1991-04-23
申请号：US1328
申请日：1987-01-07
CPC分类号： F02D41/1479
摘要： The invention relates to a control systems for feedback control of the air/fuel ratio in an internal combustion engine, e.g., an automotive engine, which uses a three-way catalyst to purify the exhaust gas, by using an exhaust sensor to detect actual values of air/fuel ratio in the engine. The control system has the function of varying the target value of air/fuel ratio according to operating conditions of the engine. The target value becomes super-stoichiometric during steady-state operation of the engine and changes to a lower value optimum for the activities of the three-way catalyst, such as the stoichiometric value, under predetermined transient conditions of the engine. At the start of such a change in the target value, the control system functions so as to intentionally deviate the air/fuel ratio from the value optimum for the three-way catalyst in a direction away from the target value immediately before the change. By doing so NOx is effectively removed by the three-way catalyst with little delay from the change in the target value of air/fuel ratio accompanying the shift to a transient operating condition.
摘要翻译： 本发明涉及一种用于反馈控制内燃机（例如使用三元催化剂净化废气）的汽车发动机的空气/燃料比的控制系统，通过使用排气传感器检测实际值 的发动机空燃比。 控制系统具有根据发动机的运行条件改变空燃比的目标值的功能。 在发动机的稳态运行期间，目标值变为超化学计量，并且在发动机的预定瞬态条件下，对于三元催化剂的活性（例如化学计量值）变化为最佳值。 在目标值的这种改变开始时，控制系统起作用，以便在紧接改变之前有意地将空燃比与三因催化剂的最佳值偏离目标值。 通过这样做，通过三元催化剂有效地除去NOx，随着转变到瞬态运行条件，空气/燃料比的目标值的变化几乎没有延迟。
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5.发明授权
公开(公告)号：US4951209A
公开(公告)日：1990-08-21
申请号：US69038
申请日：1987-07-01
申请人： Hatsuo Nagaishi , Hiroshi Sanbuichi , Masaaki Uchida , Hiromichi Miwa , Toshio Takahata , Yasuo Seimiya , Hiromasa Kubo
发明人： Hatsuo Nagaishi , Hiroshi Sanbuichi , Masaaki Uchida , Hiromichi Miwa , Toshio Takahata , Yasuo Seimiya , Hiromasa Kubo
CPC分类号： F02D41/2496 , F02D35/003 , F02D41/045 , G01F1/26 , G01F1/72
摘要： The throttle valve position is sensed and the effective cross sectional area of the induction passage determined via table look up. The value thus derived is divided by the engine speed. A basic air induction quantity is then determined via table look up and subsequently modified using a correction coefficient to allow for the effect of engine speed on the amount of air inducted into each cylinder. The effect of injector position (viz., MPI/SPI) is taken into consideration and values suited for both generated in given embodiments. In the event that the maximum induction vacuum is limited by a BCD valve or the like, an embodiment anticipates the change in induction characteristics based on the engine speed.
摘要翻译： 感测节气门位置，通过表查找确定感应通道的有效截面面积。 所得到的值除以发动机转速。 然后通过表查找来确定基本的空气感应量，并且随后使用校正系数进行修改，以允许发动机速度对引入每个气缸的空气量的影响。 考虑到喷射器位置（即MPI / SPI）的影响和适合于在给定实施例中生成的两者的值。 在最大感应真空被BCD阀等限制的情况下，实施例基于发动机转速来预测感应特性的变化。
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公开(公告)号：US4870937A
公开(公告)日：1989-10-03
申请号：US948073
申请日：1986-12-31
CPC分类号： F02D41/045
摘要： The amount of air being inducted into the cylinders of an internal combustion engine is detected and a signal indicative thereof is sampled at a predetermined intervals. The difference between two sampled values is used with the time required for a single induction phase to be carried out, to predict the total amount of air which will be inducted into each cylinder. Utilizing this approximation the amount of fuel which should be injected or otherwise supplied to the engine can be accurately determined and thus enable accurate real-time cycle to cycle A/F control.
摘要翻译： 检测到被引入内燃机的气缸的空气量，并且以预定的间隔对其指示的信号进行采样。 使用两个采样值之间的差异，同时执行单个感应阶段所需的时间，以预测将被引入每个气缸的空气总量。 利用这种近似值，可以准确地确定应该注入或以其他方式提供给发动机的燃料量，从而使得能够精确地实现实时循环以循环A / F控制。
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7.发明授权Back-up system and method for engine coolant temperature sensor in electronic engine control system 失效电子发动机控制系统中发动机冷却液温度传感器的备份系统和方法
公开(公告)号：US4556029A
公开(公告)日：1985-12-03
申请号：US479482
申请日：1983-03-28
CPC分类号： G01K15/00 , F01P11/16 , F02D41/064 , F02D41/222 , G01K7/42 , Y02T10/40
摘要： A back-up system for an engine coolant temperature sensor detects deviation of the output of the temperature sensor from its designed output range to produce a fault signal. In response to the fault signal, an engine control system derives the engine coolant temperature indirectly from other engine conditions. This derivation is based on two facts: (1) the amount of fuel required to start the engine is related to engine temperature, and (2) since the calorific value of a given engine is essentially constant, the rate of increase of engine temperature is related to the integrated number of engine revolutions. Thus, when the engine is to be started, engine temperature can be derived by gradually increasing the fuel supply quantity from a minimal initial value until the engine is able to start to determine the required fuel supply quantity. Thereafter, the derived temperature value can be updated as a function of total engine revolutions.
摘要翻译： 用于发动机冷却剂温度传感器的备用系统检测温度传感器的输出与其设计的输出范围的偏差，以产生故障信号。 响应于故障信号，发动机控制系统从其他发动机状况间接地导出发动机冷却液温度。 这个推导是基于两个事实：（1）起动发动机所需的燃料量与发动机温度有关，（2）由于给定发动机的发热量基本上是恒定的，发动机温度的增加率为 与发动机整体转数有关。 因此，当发动机起动时，可以通过从最小初始值逐渐增加燃料供给量直到发动机能够开始确定所需的燃料供给量来获得发动机温度。 此后，导出的温度值可以作为总发动机转数的函数来更新。
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