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公开(公告)号：US4915082A
公开(公告)日：1990-04-10
申请号：US318881
申请日：1989-03-06
CPC分类号： F02D41/1494
摘要： An air-fuel ratio controller of an internal combustion engine stops current flow of an oxygen pump and power supply to an heater when the engine stops.In one embodiment the A/F ratio controller related to the invention stops power supply to the heater a predetermined period of time after the engine stops.
摘要翻译： 当发动机停止时，内燃机的空燃比控制器停止氧气泵的电流流动和加热器的电力供应。 在一个实施例中，与本发明相关的A / F比率控制器在发动机停止之后的预定时间段内停止向加热器供电。
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公开(公告)号：US4958611A
公开(公告)日：1990-09-25
申请号：US317486
申请日：1989-03-01
IPC分类号： F02D41/00 , F02D41/14 , G01N27/406 , G01N27/419
CPC分类号： F02D41/1494 , G01N27/4067
摘要： The air-fuel (A/F) ratio controller of an internal combustion engine related to the invention detects occurrence of abnormal condition in a heater on the basis of the resistance value of this heater which heats an oxygen sensor generating a specific voltage responsive to the difference of oxygen concentration between atmosphere and exhaust gas of the engine and of an oxygen pump allowing the pump current flow in order that the voltage can be the predetermined value. If abnormal condition arises in the heater, the A/F ratio controller stops fuel feedback control operation. The A/F ratio controller related to the invention forms a Wheatstone bridge circuit which includes the heater mentioned above and detects occurrence of an abnormal condition in the heater on the basis of the equilibrium condition of signal outputted from the Wheatstone bridge circuit.
摘要翻译： 本发明的内燃机的空燃比控制装置根据该加热器的电阻值来检测加热器的异常状态的发生，该加热器的加热器响应于该加热器产生特定电压的氧传感器 发动机和氧气泵的大气和废气之间的氧浓度的差异允许泵电流流动，以便电压可以是预定值。 如果加热器出现异常情况，则A / F比率控制器停止燃油反馈控制。 与本发明相关的A / F比率控制器形成了惠斯登电桥电路，该电路包括上述加热器，并根据惠斯登电桥电路输出的信号的平衡条件，检测加热器的异常情况。
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公开(公告)号：US4982714A
公开(公告)日：1991-01-08
申请号：US515524
申请日：1990-04-30
IPC分类号： F02D41/14
CPC分类号： F02D41/1487
摘要： In an air-fuel ratio control apparatus for an internal combustion engine, an air-fuel ratio sensor detects an air-fuel ratio in response to specified components contained in exhaust gas and an electronic control section receives a signal from the air-fuel ratio sensor to calculate an amount of fuel to be injected from a fuel supplying device so that the air-fuel ratio of a gas mixture to be supplied to the engine approaches a target air-fuel ratio. A parameter of a load for the engine and an engine revolution number are each detected, and the electronic control section calculates a correction coefficient on the basis of the parameter of the load and the engine revolution number, whereby the output of the air-fuel ratio sensor is corrected.
摘要翻译： 在内燃机的空燃比控制装置中，空燃比传感器响应于废气中包含的规定成分检测空燃比，电子控制部接收来自空燃比传感器的信号 计算从燃料供给装置喷射的燃料量，使得供给发动机的混合气体的空燃比接近目标空燃比。 分别检测发动机的负荷和发动机转数的参数，电子控制部根据负载的参数和发动机转速来计算校正系数，由此空燃比的输出 传感器被校正。
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公开(公告)号：US4915077A
公开(公告)日：1990-04-10
申请号：US249736
申请日：1988-09-26
IPC分类号： F02B1/04 , F02D41/00 , F02D41/14 , G01N27/406
CPC分类号： F02D41/1476 , G01N27/4065 , F02B1/04
摘要： An air-fuel control apparatus comprises an air-fuel ratio sensor comprising a gap portion for introducing exhaust gas generated from an engine, a solid electrolyte oxygen pump for controlling a partial pressure of oxygen in the gap portion and a solid electrolyte oxygen sensor producing an electromotive force in response to a proportion of the partial pressure of oxygen in the gap portion and a partial pressure of oxygen in other than the gap portion. The air-fuel control apparatus is further provided with an electronic control device including a pump current stopping means which controls a pump current from the solid electrolyte oxygen pump so that the electromotive force generated by the solid electrolyte oxygen sensor is maintained at a constant value, and controls not to feed the pump current when the engine is stopped, and a control device which operates the optimum quantity of fuel supply to thereby effect an air-fuel control by a gas mixture producing mean in an operational condition that the engine is not subjected to a feed-back control on the basis of an output signal from the air-fuel ratio sensor, and controls not to feed a pump current by the actuation of the pump current stopping means when the revolution number of the engine is determined to be lower than a predetermined value, i.e. the engine is stopped in an operational condition that the engine is subjected to the feed-back control on the basis of the pump current.
摘要翻译： 一种空燃比控制装置，包括：空燃比传感器，包括用于引入从发动机产生的废气的间隙部分，用于控制间隙部分中的氧分压的固体电解质氧泵;以及固体电解质氧传感器， 响应于间隙部分中氧的分压的比例的电动势和除了间隙部分之外的氧的分压。 该空燃燃料控制装置还具备电子控制装置，该电子控制装置包括：泵电流停止装置，其控制来自固体电解质氧泵的泵电流，使得由固体电解质氧传感器产生的电动势维持在恒定值; 并且控制在发动机停止时不馈送泵电流;以及控制装置，其操作最佳燃料供应量，从而通过在发动机不受影响的操作条件下产生平均值的气体混合物进行空燃比控制 到基于来自空燃比传感器的输出信号的反馈控制，并且当发动机的转速确定为较低时，通过泵电流停止装置的动作来控制不供给泵电流 即发动机在基于泵电流对发动机进行反馈控制的运行状态下停止。
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公开(公告)号：US4947819A
公开(公告)日：1990-08-14
申请号：US320652
申请日：1989-03-08
IPC分类号： G01N27/409 , F02D41/00 , F02D41/14 , G01N27/04
CPC分类号： F02D41/1494 , F02D41/1456
摘要： The invention relates to an air-fuel (A/F) ratio controller of an internal combustion engine, which is provided with a constant-voltage circuit between the heater for heating the A/F ratio sensor and the power-supply source. Regardless of variation of voltage outputted from the power-supply source, the A/F ratio controller securely maintains the heater voltage constant and prevents occurrence of error in the signal outputted from the A/F ratio sensor by correctly operating the oxygen-concentration detecting element whose measuring precision is solely dependent on temperature.
摘要翻译： 本发明涉及一种在用于加热A / F比传感器的加热器和电源之间设置有恒压电路的内燃机的空燃比（A / F）比控制器。 不管从电源输出的电压的变化，A / F比控制器通过正确地操作氧浓度检测元件，可靠地保持加热器电压恒定并防止从A / F比传感器输出的信号的误差 其测量精度仅取决于温度。
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公开(公告)号：US4911130A
公开(公告)日：1990-03-27
申请号：US322339
申请日：1989-03-10
IPC分类号： G01N27/409 , F02D41/00 , F02D41/14 , G01N27/04
CPC分类号： F02D41/1494 , F02D41/1491
摘要： An air-fuel (A/F) controller of an internal combustion engine, which computes an average value of a plurality of duty ratios of the voltage supplied to the heater according to the engine speed and the engine load periodically detected during a period from a predetermined moment up to the present, and fixes said average value as the present duty ratio of the voltage to be supplied to the heater, since the A/F ratio sensor is heated not only by the heater but also by exhaust gas. The A/F ratio controller smoothes the variation of voltage to be supplied to the heater by applying the computed average value as the present duty ratio of the supply voltage which is to be supplied to the heater. Accordingly, even when the driving condition is in high-speed, variation of the temperature borne by the heater is mild and smooth, and thus, the temperature of the oxygen-concentration detecting element does not rise suddenly. Furthermore, the A/F ratio controller corrects the above-mentioned present duty ratio of the voltage to be supplied to the heater according to the supply voltage to be supplied to the heater.
摘要翻译： 一种内燃机的空燃料（A / F）控制器，其根据发动机转速和在从一燃料发动机的时间段周期性地检测到的发动机负荷来计算提供给加热器的电压的多个占空比的平均值 并且将所述平均值固定为要供给到加热器的电压的当前占空比，因为A / F比传感器不仅由加热器而且被排气加热。 A / F比率控制器通过将计算的平均值作为要供给到加热器的电源电压的当前占空比来平滑要提供给加热器的电压的变化。 因此，即使在驱动条件高速的情况下，由加热器承受的温度变化也温和平滑，因此氧浓度检测元件的温度不会突然上升。 此外，A / F比率控制器根据供给到加热器的供给电压来校正上述提供给加热器的电压的占空比。
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公开(公告)号：US4886028A
公开(公告)日：1989-12-12
申请号：US310571
申请日：1989-02-15
申请人： Masanobu Uchinami , Toshihisa Takahashi , Hiroyoshi Suzuki , Ryoji Nishiyama , Shinichi Nishida
发明人： Masanobu Uchinami , Toshihisa Takahashi , Hiroyoshi Suzuki , Ryoji Nishiyama , Shinichi Nishida
CPC分类号： F02D41/1476 , F02D41/1488 , F02D41/1495
摘要： An air-fuel ratio control apparatus for an internal combustion engine comprises feedback control of the air-fuel ratio control, wherein a pump-driving voltage for flowing a pump-driving current is lowered to a predetermined value, and feedback control is suspended when the pump-driving current becomes lower than a predetermined value.
摘要翻译： 用于内燃机的空燃比控制装置包括空燃比控制的反馈控制，其中用于使泵驱动电流流动的泵驱动电压降低到预定值，并且当所述空燃比控制装置 泵驱动电流变得低于预定值。
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公开(公告)号：US5148369A
公开(公告)日：1992-09-15
申请号：US693066
申请日：1991-05-01
申请人： Masanobu Uchinami , Toshihisa Takahashi , Ryoji Nishiyama , Hiroyoshi Suzuki , Shinichi Nishida
发明人： Masanobu Uchinami , Toshihisa Takahashi , Ryoji Nishiyama , Hiroyoshi Suzuki , Shinichi Nishida
CPC分类号： F02D41/1479
摘要： An air-fuel ratio control apparatus for an internal combustion engine controls a fuel supplying means by a signal generated from an air-fuel sensor so that the air-fuel ratio of a gas mixture to be sucked into the internal combustion engine becoms a target air-fuel ratio. The air-fuel ratio control apparatus corrects the target air-fuel ratio by a parameter on the condition of the engine detected by the detecting means so that a fuel supplying device is controlled to obtain a corrected target air-fuel ratio.
摘要翻译： 用于内燃机的空燃比控制装置通过由空气 - 燃料传感器产生的信号来控制燃料供给装置，使得要吸入内燃机的气体混合物的空燃比成为目标空气 - 燃料比。 空燃比控制装置通过由检测装置检测到的发动机的状态的参数来校正目标空燃比，从而控制燃料供给装置以获得校正的目标空燃比。
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公开(公告)号：US4895123A
公开(公告)日：1990-01-23
申请号：US310575
申请日：1989-02-15
申请人： Masanobu Uchinami , Toshihisa Takahashi , Hiroyoshi Suzuki , Ryoji Nishiyama , Shinichi Nishida
发明人： Masanobu Uchinami , Toshihisa Takahashi , Hiroyoshi Suzuki , Ryoji Nishiyama , Shinichi Nishida
CPC分类号： F02D41/1476 , F01N2550/14
摘要： Techniques are provided for controlling the operation of an air-fuel ratio control apparatus for an internal combustion engine including feedback control of the air-fuel ratio control. The pump-driving voltage for flowing the pump-driving current used for changing the oxygen concentration is monitored and feedback control is suspended when the pump-driving voltage departs from a predetermined range.
摘要翻译： 提供了用于控制用于内燃机的空燃比控制装置的操作的技术，其包括空燃比控制的反馈控制。 监测用于流过用于改变氧浓度的泵驱动电流的泵驱动电压，并且当泵驱动电压偏离预定范围时，反馈控制被暂停。
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公开(公告)号：US5035220A
公开(公告)日：1991-07-30
申请号：US381919
申请日：1989-07-19
CPC分类号： G01M15/11 , F02D41/0087 , F02D41/1498 , F02D2200/1015
摘要： A fuel controller for an internal combustion engine has a misfiring sensor which can detect when misfiring occurs in an engine cylinder. When misfiring is detected, the fuel injector corresponding to the misfiring cylinder is prevented from supplying fuel to the misfiring cylinder, while the fuel injectors for the other cylinders continue to operate normally. The fuel injector for the misfiring cylinder can be disabled by a switching circuit which turns off a power amplifier for driving the fuel injector. Misfiring can be detected by sensing changes in the rotational speed of the engine between prescribed crankshaft angles due to a reduction in torque when misfiring occurs.
摘要翻译： 用于内燃机的燃料控制器具有能够检测在发动机气缸中发生何时发生故障的点火传感器。 当检测到失火时，与其他气缸的燃料喷射器继续正常运转的情况相比，防止了与点火不正确的气缸相对应的燃料喷射器供给到失火气缸。 可以通过切断用于驱动燃料喷射器的功率放大器关闭的开关电路来禁用用于不输出燃料气缸的燃料喷射器。 可以通过在发生失火时由于转矩减小而感测发动机在规定曲轴角度之间的转速的变化来检测到失火。
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