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公开(公告)号：US4665745A
公开(公告)日：1987-05-19
申请号：US729852
申请日：1985-05-02
申请人： Katsuhiro Ina , Yoshihisa Sato , Masumi Kinugawa , Atsushi Suzuki , Katsunori Ito , Susumu Akiyama , Tiaki Mizuno , Toshitaka Yamada , Tomoaki Abe
发明人： Katsuhiro Ina , Yoshihisa Sato , Masumi Kinugawa , Atsushi Suzuki , Katsunori Ito , Susumu Akiyama , Tiaki Mizuno , Toshitaka Yamada , Tomoaki Abe
CPC分类号： G01F1/6986
摘要： An air flowrate measuring apparatus with a heat wire measures the flow rate of the air flowing through the intake pipe of an engine. The apparatus has a temperature sensitive element which has a specific temperature-resistance characteristic and is disposed in the intake pipe. Constant heating voltage is applied to this element in response to a start signal, thus heating the element. When the temperature of the element rises to a specified value, the application of the voltage is stopped. At the same time, a pulse signal whose width corresponds to the period of applying the voltage is generated. The signal is supplied to an interface circuit through a drive circuit driven by a reference voltage which has been also used to control the heating voltage. The interface circuit comprises two wave-shaping circuits. The first wave-shaping circuit has a filter means of a small integration time constant. The second wave-shaping circuit has a filter means whose integration time constant is large enough to remove noise from the input signal.
摘要翻译： 具有热丝的空气流量测量装置测量流过发动机的进气管的空气的流量。 该装置具有温度敏感元件，该温度敏感元件具有特定的耐温特性并且设置在进气管中。 响应于启动信号对该元件施加恒定的加热电压，从而加热元件。 当元件的温度上升到指定值时，停止施加电压。 同时，产生宽度对应于施加电压的周期的脉冲信号。 该信号通过由参考电压驱动的驱动电路提供给接口电路，该参考电压也被用于控制加热电压。 接口电路包括两个波形整形电路。 第一波形整形电路具有小积分时间常数的滤波器装置。 第二波形整形电路具有滤波器装置，其积分时间常数足够大以从输入信号中去除噪声。
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公开(公告)号：US4683858A
公开(公告)日：1987-08-04
申请号：US863938
申请日：1986-05-16
申请人： Yoshihisa Sato , Masumi Kinugawa , Susumu Akiyama , Toshitaka Yamada , Tiaki Mizuno , Atsushi Suzuki
发明人： Yoshihisa Sato , Masumi Kinugawa , Susumu Akiyama , Toshitaka Yamada , Tiaki Mizuno , Atsushi Suzuki
CPC分类号： G01F1/6965 , F02D41/187 , G01F1/698 , G01F1/6986
摘要： In an apparatus for controlling an engine, as an air flow sensor for measuring intake air flow quantity, a heater resistor having temperature-resistance characteristic and a temperature sensitive resistor for sensing air temperature are provided in an intake passage, and heating electric power is supplied to the heater resistor in response to a start signal generated periodically. The heating electric power is cut off when the temperature of the heater resistor is raised to a specified reference temperature predetermined in accordance with the air temperature, so that an output signal indicative of the time width in which the heating electric power is supplied is applied to an electronic control unit to measure air flow quantity therefrom. Further, compensation coefficient stored in a memory is derived in correspondence to the intake air temperature sensed by the temperature sensitive resistor, and the output signal is compensated for by the compensation coefficient to compensate the measured air flow quantity. Based on the compensated air flow quantity, fuel injection quantity, ignition timing or the like is computed in the electronic control unit.
摘要翻译： 在用于控制发动机的装置中，作为用于测量进气流量的气流传感器，具有耐温特性的加热电阻器和用于感测空气温度的感温电阻器设置在进气通道中，并且供应加热电力 响应于周期性地产生的启动信号到加热器电阻器。 当加热电阻器的温度升高到根据空气温度预定的指定参考温度时，加热电力被切断，从而将表示加热电力的时间宽度的输出信号施加到 电子控制单元，用于测量气流量。 此外，存储在存储器中的补偿系数相应于由感温电阻感测的进气温度导出，并且通过补偿系数补偿输出信号以补偿测量的空气流量。 基于补偿空气流量，在电子控制单元中计算燃料喷射量，点火正时等。
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公开(公告)号：US4680964A
公开(公告)日：1987-07-21
申请号：US874854
申请日：1986-06-16
申请人： Yoshihisa Sato , Masumi Kinugawa , Susumu Akiyama , Toshitaka Yamada , Tiaki Mizuno , Atsushi Suzuki , Kengo Sugiura
发明人： Yoshihisa Sato , Masumi Kinugawa , Susumu Akiyama , Toshitaka Yamada , Tiaki Mizuno , Atsushi Suzuki , Kengo Sugiura
CPC分类号： G01F1/698 , G01F1/6986 , G01P5/12
摘要： A heater, which comprises an element whose resistance varies with changes in temperature, and a temperature element are provided in the air intake pipe of an engine. This heater and temperature element together with resistors form a bridge circuit to which heating power is supplied via a transistor. An engine control unit generates start signals Tin simultaneously with the rotation of the engine. A flip-flop circuit is set by these start signals and, when set, the transistor is turned on and the heating power rises. The output signal from the bridge circuit is supplied to a comparator and the output signal of the comparator resets the flip-flop circuit, which outputs a pulse-shaped signal representing the airflow quantity as a length of time. This pulse-shaped time signal is sent via a constant current circuit to another comparator, where it is compared with a reference voltage and the output signal from the comparator is supplied together with the above time signal to an exclusive OR circuit. This exclusive OR circuit outputs a first and second pulse signal as the measurement output signal Tout synchronously with the rise and fall of the time signal and this signal is supplied to the engine control unit.
摘要翻译： 在发动机的进气管中设置有加热器，其包括其电阻随温度变化而变化的元件和温度元件。 该加热器和温度元件与电阻器一起形成桥式电路，通过晶体管供应加热功率。 发动机控制单元在发动机旋转的同时产生起始信号Tin。 触发器电路由这些启动信号设定，当置位时，晶体管导通，加热功率上升。 来自桥接电路的输出信号被提供给比较器，并且比较器的输出信号复位触发器电路，其将表示气流量的脉冲信号输出为时间长度。 该脉冲形时间信号通过恒流电路发送到另一个比较器，在此与比较器进行比较，将来自比较器的输出信号与上述时间信号一起提供给异或电路。 该异或电路输出作为测量输出信号Tout的第一和第二脉冲信号与时间信号的上升和下降同步，并将该信号提供给发动机控制单元。
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公开(公告)号：US4713765A
公开(公告)日：1987-12-15
申请号：US704032
申请日：1985-02-21
申请人： Tomoaki Abe , Hideya Fujisawa , Norio Omori , Masumi Kinugawa , Katsunori Ito , Susumu Akiyama , Tiaki Mizuno , Toshitaka Yamada
发明人： Tomoaki Abe , Hideya Fujisawa , Norio Omori , Masumi Kinugawa , Katsunori Ito , Susumu Akiyama , Tiaki Mizuno , Toshitaka Yamada
CPC分类号： F02D41/187
摘要： A control system for an engine has a temperature sensitive element as part of a device for measuring the air flow in an air intake manifold to the engine. Further, a first pulse signal is generated, corresponding to the rotation of the engine, for controlling the setting of a flip-flop. A transistor is conducted in the set state of the flip-flop to supply a heating electric current to the element. The element supplied with the current is raised to the temperature that corresponds to the air flow in the manifold. When the temperature of the element is raised until the specified temperature difference to the air temperature (measured by a sub temperature sensitive element) is set, the temperature difference is detected by a comparator, and the flip-flop is reset by the detection signal. A pulse-shaped signal corresponding to the set state of the flip-flop is produced as a measurement output signal, supplied as one detection signal of the operating state of the engine to an engine control unit, and the current to the element is controlled to be supplied by the pulse-shaped signal.
摘要翻译： 用于发动机的控制系统具有温度敏感元件，作为用于测量到发动机的进气歧管中的气流的装置的一部分。 此外，产生与发动机的旋转对应的第一脉冲信号，用于控制触发器的设定。 晶体管在触发器的置位状态下被导通，以向元件提供加热电流。 提供电流的元件升高到对应于歧管中气流的温度。 当元件的温度升高直到与空气温度（由次级温度敏感元件测量）的指定温度差设定为止时，通过比较器检测温度差，并且触发器由检测信号复位。 产生与触发器的设定状态相对应的脉冲状信号作为测量输出信号，作为发动机的运行状态的一个检测信号提供给发动机控制单元，并且将对该元件的电流控制为 由脉冲信号提供。
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公开(公告)号：US4669306A
公开(公告)日：1987-06-02
申请号：US743492
申请日：1985-06-11
CPC分类号： G01F1/6986 , G01F1/6983
摘要： A heat generating element having a thermal characteristic such that its resistance varies in response to changes in temperature is provided in the intake pipe of an engine. A heating power, the voltage of which is set by a reference voltage source, is supplied to the heat generating element via a transistor. The supply of this heating power is controlled by a start pulse signal periodically generated by a set flip-flop circuit when the ignition switch is on. When the heat generating element reaches a predetermined temperature, the supply is cut off by the flip-flop circuit. A measurement signal having a pulse width corresponding to the time period of heating power supply is generated from the flip-flop circuit. The opening of the ignition switch is detected and a one-shot multivibrator is driven to produce a burn-off signal having a pulse width to which the burn-off period corresponds. This burn-off control signal turns the transistor on and heating power is supplied to the heat generating element and the voltage of the reference power source is reduced so that the voltage of the heating power is switched to a low level.
摘要翻译： 在发动机的进气管中设置具有热特性使得其电阻随温度变化而变化的发热元件。 其电压由参考电压源设定的加热功率通过晶体管提供给发热元件。 当点火开关接通时，通过由设置的触发器电路周期性地产生的起动脉冲信号来控制该加热功率的供应。 当发热元件达到预定温度时，电源被触发器电路切断。 从触发电路产生具有与加热电源的时间段对应的脉冲宽度的测量信号。 检测点火开关的打开，并且驱动单稳态多谐振荡器以产生具有燃烧时间对应的脉冲宽度的燃烧断开信号。 该熄火控制信号使晶体管接通，向发热元件供给加热电力，降低基准电源的电压，使加热电力的电压切换为低电平。
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公开(公告)号：US4671242A
公开(公告)日：1987-06-09
申请号：US736373
申请日：1985-05-21
CPC分类号： F02D41/2412 , F02D41/182 , F02D41/187
摘要： An engine control apparatus has an air flow rate measuring device for measuring an intake air flow rate. A temperature sensing element having a temperature characteristic and constituting the device is arranged in an intake pipe. The device generates an output pulse signal having a pulse width T corresponding to the intake air flow rate. An engine control unit has the one-dimensional map for storing the relationship between the engine speed N and the pulse width to of the signal corresponding to the air flow rate. This data to is read out from the one-dimensional map in accordance with the engine speed N. Subsequently, the data to is subtracted from the data T to calculate a time duration t. The unit also has a two-dimensional map for storing the relationship between each time duration t and the corresponding rate G/N in correspondence with each of the present engine speeds. A corresponding rate G/N is read out from the two-dimensional map in response to the calculated time duration t. The resultant rate G/N is used to calculate fuel injection quantity.
摘要翻译： 发动机控制装置具有用于测量进气流量的空气流量测量装置。 具有温度特性并构成装置的温度感测元件设置在进气管中。 该装置产生具有对应于进气流量的脉冲宽度T的输出脉冲信号。 发动机控制单元具有存储发动机转速N与对应于空气流量的信号的脉冲宽度对的关系的一维映射。 根据发动机转速N从一维映射中读出该数据。接着，从数据T中减去数据，计算持续时间t。 该单元还具有用于存储与每个当前发动机速度相对应的每个持续时间t和相应速率G / N之间的关系的二维图。 响应于计算的持续时间t，从二维图中读出对应的速率G / N。 合成速率G / N用于计算燃料喷射量。
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7.发明授权
公开(公告)号：US4736302A
公开(公告)日：1988-04-05
申请号：US742524
申请日：1985-06-07
申请人： Masumi Kinugawa , Norio Omori , Tomoaki Abe , Katsunori Ito , Susumu Akiyama , Yuzi Hirabayashi
发明人： Masumi Kinugawa , Norio Omori , Tomoaki Abe , Katsunori Ito , Susumu Akiyama , Yuzi Hirabayashi
IPC分类号： F02D41/00 , F02D41/18 , F02D41/24 , F02D41/26 , F02D45/00 , H01L21/302 , F02M51/00 , G01F1/68
CPC分类号： F02D41/187 , F02D41/263
摘要： A system for controlling the operating condition of an engine in which a temperature sensing element constitutes an airflow measuring device disposed in an intake air passage of the engine. The temperature sensing element is supplied with a heating current in response to a start pulse signal produced with every one-half period of each combustion cycle of the engine. A comparator delivers an output signal when a reference temperature set on the basis of the air temperature measured by an auxiliary temperature sensing element is reached by the temperature of the temperature sensing element. A pulse signal indicative of the time interval between the generation of the start pulse signal and a rise in the output signal of the comparator is delivered as an airflow measurement signal. The average airflow quantity responsive to one combustion cycle of the engine is detected, and a correction factor K is calculated from the difference between two airflow rate data measured in each combustion cycle and the average airflow quantity. Based on the correction factor K, the injection quantity, injection timing and the like are calculated.
摘要翻译： 一种用于控制发动机的操作状态的系统，其中温度感测元件构成设置在发动机的进气通道中的气流测量装置。 响应于在发动机的每个燃烧循环的每半个周期产生的起动脉冲信号，向温度感测元件供应加热电流。 当基于由辅助温度感测元件测量的空气温度设定的参考温度达到温度感测元件的温度时，比较器输出输出信号。 指示起始脉冲信号的产生和比较器的输出信号的上升之间的时间间隔的脉冲信号作为气流测量信号被输送。 检测响应于发动机的一个燃烧循环的平均气流量，并且根据在每个燃烧循环中测量的两个气流速率数据与平均气流量之间的差计算校正因子K. 基于校正因子K，计算喷射量，喷射正时等。
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公开(公告)号：US4730255A
公开(公告)日：1988-03-08
申请号：US737088
申请日：1985-05-23
CPC分类号： F02D41/2422 , F02D41/187
摘要： An engine control apparatus for controlling the quantity of fuel injected into the engine is equipped with an intake air flow rate measuring device for detecting the operating state of the engine. This measuring device has a heat sensitive element, which is located in the intake pipe, and outputs a pulse signal having a pulse width T corresponding to the intake fuel amount. Engine control apparatus has a plurality of map memory means in which a plurality of functions f.sub.1 (N), f.sub.2 (N), f.sub.3 (N), which express the polynomial approximation ##EQU1## for expressing the air flow rate G/N per engine revolution, are stored as the parameters of the number of engine rotations N. These functions are read out from the maps and, based on the number of engine rotations N, the fuel injection amount corresponding to the pulse width T of the air flow rate is calculated.
摘要翻译： 用于控制喷射到发动机中的燃料量的发动机控制装置配备有用于检测发动机的运行状态的进气流量测量装置。 该测量装置具有位于进气管中的热敏元件，并输出与进气量对应的脉冲宽度T的脉冲信号。 发动机控制装置具有多个地图存储装置，其中表示用于表示每个发动机的空气流量G / N的多项式近似值“IMAGE”的多个函数f1（N），f2（N），f3（N） 旋转数据被存储为发动机转数N的参数。这些功能从图中读出，并且基于发动机转数N，与空气流量的脉冲宽度T对应的燃料喷射量是 计算。
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公开(公告)号：US4571991A
公开(公告)日：1986-02-25
申请号：US645393
申请日：1984-08-29
申请人： Tomoaki Abe , Masumi Kinugawa , Atsushi Suzuki
发明人： Tomoaki Abe , Masumi Kinugawa , Atsushi Suzuki
CPC分类号： G01F1/698
摘要： An air flow detecting element is located in the air flow to be measured. This air flow detecting element comprises a heater made of resistant material having a positive temperature coefficient and wound around a first heat resistant frame, a first heat sensitive element wound around the first frame together with the heater and made of resistant material having a positive temperature coefficient and receiving heat from the heater, and a second heat sensitive element wound around a second heat resistant frame and made of resistant material having a positive temperature coefficient, and serving to measure the temperature of the air. A bridge circuit comprises a series circuit consisting of the heater and fixed resistances connected in series with each other, and a series circuit consisting of the first and second heat sensitive elements connected in series with each other. Potential differences at the output terminal of this bridge circuit are compared by an OP amplifier. The base of a transistor, with controls the power source current relative to the bridge circuit, is controlled by the OP amplifier. An output voltage signal which corresponds to the value of the current flowing to the heater is detected and supplied as a terminal voltage of the fixed resistance.
摘要翻译： 空气流量检测元件位于要测量的空气流中。 这种气流检测元件包括由耐温材料制成的加热器，其具有正温度系数并缠绕在第一耐热框架上，第一热敏元件与加热器一起缠绕在第一框架周围，并由具有正温度系数的电阻材料制成 并且从加热器接收热量，以及缠绕在第二耐热框架周围并由具有正温度系数的耐热材料制成并用于测量空气温度的第二热敏元件。 桥式电路包括由加热器和彼此串联连接的固定电阻组成的串联电路，以及由彼此串联连接的第一和第二热敏元件组成的串联电路。 该桥式电路输出端的电位差由OP放大器进行比较。 控制电源电流相对于桥式电路的晶体管的基极由OP放大器控制。 检测并输出与流过加热器的电流值对应的输出电压信号作为固定电阻的端子电压。
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公开(公告)号：US4945883A
公开(公告)日：1990-08-07
申请号：US318185
申请日：1989-03-02
CPC分类号： F02D41/187 , F02B1/04 , F02B2075/027
摘要： An internal combustion engine control device is constructed to estimate an engine air intake quantity based on an engine speed when the engine is running in an intake air pulsation generating range to control the engine in accordance with the air intake quantity thus estimated. The estimated air intake quantity is corrected by a correction value which is related to the density of the intake air.
摘要翻译： 内燃机控制装置被构造成当发动机在进气脉动产生范围内行驶时基于发动机转速来估计发动机进气量，以根据如此估计的进气量来控制发动机。 通过与进气密度相关的校正值来校正估计进气量。
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