公开(公告)号：US5802861A

公开(公告)日：1998-09-08

申请号：US689496

申请日：1996-08-07

申请人： Yukihiro Yamashita ,  Jun Hasegawa ,  Yasuhiko Niimi ,  Hiroshi Kishita

发明人： Yukihiro Yamashita ,  Jun Hasegawa ,  Yasuhiko Niimi ,  Hiroshi Kishita

IPC分类号： F01N3/24 ,  B60H1/32 ,  F02D29/04 ,  F02D41/14 ,  F24F5/00

CPC分类号： B60H1/3208

摘要： An exhaust gas detoxifying system includes a catalytic converter in the exhaust system of an engine to detoxify exhaust gas. An air conditioner includes a compressor which is driven by the engine, and it performs air conditioning of the vehicle interior based on a refrigeration cycle. The operation of the air conditioner compressor is restricted depending on the degree of necessity of air conditioning, which is calculated from the difference between a vehicle interior temperature and a target temperature, if the catalytic converter exhaust gas detoxification performance is expected to deteriorate during accelerating or heavy-load operations of the engine.

摘要翻译： 排气解毒系统包括在排气系统中的催化转化器，用于排气。 空调器包括由发动机驱动的压缩机，并且其基于制冷循环执行车辆内部的空调。 如果催化转化器废气排毒性能预期在加速期间劣化，则空调压缩机的操作根据由车辆内部温度和目标温度之间的差异计算的空调需要程度来限制，或者 发动机的重载操作。

公开(公告)号：US06258232B1

公开(公告)日：2001-07-10

申请号：US09218083

申请日：1998-12-22

申请人： Jun Hasegawa ,  Yukihiro Yamashita ,  Tomomichi Mizoguchi ,  Masayuki Takami

发明人： Jun Hasegawa ,  Yukihiro Yamashita ,  Tomomichi Mizoguchi ,  Masayuki Takami

IPC分类号： G01N27407

CPC分类号： F02D41/1494 ,  F02D41/1456 ,  G01N27/4067

摘要： A sensor element of an A/F sensor is constructed to laminate and integrate a solid electrolyte and a heater. The A/F sensor outputs a linear A/F detection signal proportional to the oxygen concentration in exhaust gases, when voltage is applied. An ECU controls the heater through heater control circuit to keep the sensor element at a predetermined activation temperature. The ECU detects an element resistance on the basis of the voltage applied to the sensor element and sensor current caused by the applied voltage, and converts the element resistance to an element temperature. During the temperature increasing of the A/F sensor, the current supply to the heater is duty-controlled according to the element temperature changing rate (the temperature increasing rate of the sensor element). Accordingly, the temperature increasing characteristics of the sensor is satisfactorily maintained, and disadvantages such as an element cracking are prevented.

摘要翻译： A / F传感器的传感器元件被构造成层压和集成固体电解质和加热器。 当施加电压时，A / F传感器输出与排气中的氧浓度成比例的线性A / F检测信号。 ECU通过加热器控制电路控制加热器，以将传感器元件保持在预定的活化温度。 ECU根据施加到传感器元件的电压和由施加电压引起的传感器电流检测元件电阻，并将元件电阻转换为元件温度。 在A / F传感器的温度升高期间，根据元件温度变化率（传感器元件的升温速率）对加热器的电流进行占空比控制。 因此，能够令人满意地保持传感器的升温特性，防止元件破裂等缺点。

公开(公告)号：US06382188B1

公开(公告)日：2002-05-07

申请号：US09795317

申请日：2001-03-01

申请人： Jun Hasegawa ,  Yukihiro Yamashita

发明人： Jun Hasegawa ,  Yukihiro Yamashita

IPC分类号： F02M5100

摘要： In a fuel injection control system for an internal combustion engine, a fuel atomization device is provided to atomize fuel injected at the time of engine starting. The fuel atomization device may be a type which increases fuel pressure to a higher value at the time of engine starting than after the engine starting. Alternatively, the fuel atomization device may be a type which supplies assist air to the injected fuel. An intake valve is opened for a longer period at the time of engine starting than after the engine starting, so that more fuel may be supplied to an engine cylinder. A fuel leakage which may occur during engine stop is estimated, and the amount of fuel to be injected at the time of next engine starting after the engine stop is corrected by the estimated amount of fuel leakage. Fuel injection timing at the time of engine starting is retarded relative to that of post-engine starting. The amount of injected fuel adhered to an intake port and not supplied into an engine cylinder after the closing of the intake valve is estimated, and the amount of fuel to be injected next is corrected thereby.

公开(公告)号：US6094975A

公开(公告)日：2000-08-01

申请号：US055782

申请日：1998-04-07

申请人： Jun Hasegawa ,  Yukihiro Yamashita

发明人： Jun Hasegawa ,  Yukihiro Yamashita

IPC分类号： G01N27/41 ,  F02D41/14 ,  F02D45/00 ,  G01N27/406 ,  G01M15/00

CPC分类号： F02D41/1494 ,  G01N27/4067 ,  F02D41/1456

摘要： In a system using a gas concentration sensor such as an A/F sensor having a heater, a microcomputer detects an abnormality in a heater power supply control. After the detection of abnormality, the computer reduces the electric power to the heater to a minimum and determines whether the heater has restored its normal operation. The power supply to the heater is stopped and returned to the normal power supply control when it is determined that the detected abnormality continues and discontinues during the reduced power supply period, respectively.

摘要翻译： 在使用诸如具有加热器的A / F传感器之类的气体浓度传感器的系统中，微型计算机检测加热器电源控制中的异常。 在检测到异常之后，计算机将加热器的电力降至最低，并确定加热器是否恢复正常运行。 当确定检测到的异常继续并且在减小的供电周期期间中断时，加热器的电源被停止并返回到正常的电源控制。

公开(公告)号：US5974857A

公开(公告)日：1999-11-02

申请号：US172662

申请日：1998-10-15

申请人： Yukihiro Yamashita ,  Hisashi Iida ,  Jun Hasegawa

发明人： Yukihiro Yamashita ,  Hisashi Iida ,  Jun Hasegawa

IPC分类号： F02D41/14 ,  G01N27/406

CPC分类号： F02D41/1476 ,  F02D41/1494 ,  G01N27/4067 ,  F02D41/1456

摘要： A sensing element of an oxygen sensor is controlled to keep a target impedance for maintaining activation temperature of the oxygen sensor. As the sensing element deteriorates, its internal impedance increases and power supply to a heater for heating the sensing element increases. The oxygen sensor temperature rises excessively above an activation temperature. To restrict excessive temperature rise, the target impedance is altered when the supply power to the heater exceeds a predetermined reference. The target impedance may be increased with increase in the power supply to the heater. Alternatively, the heater supply power is limited to a predetermined maximum for restricting excessive temperature rise.

摘要翻译： 控制氧传感器的感测元件以保持目标阻抗以保持氧传感器的激活温度。 当传感元件劣化时，其内部阻抗增加，并且用于加热感应元件的加热器的电力供应增加。 氧传感器温度过高上升到活化温度以上。 为了限制过度的温度上升，当加热器的供电超过预定的参考值时，目标阻抗被改变。 目标阻抗可以随着对加热器的电力供应的增加而增加。 或者，加热器供给功率被限制在预定的最大值以限制过度的温度上升。

公开(公告)号：US5719778A

公开(公告)日：1998-02-17

申请号：US500423

申请日：1995-07-10

申请人： Toshihiro Suzumura ,  Shigenori Isomura ,  Tomomichi Mizoguchi ,  Yukihiro Yamashita ,  Jun Hasegawa

发明人： Toshihiro Suzumura ,  Shigenori Isomura ,  Tomomichi Mizoguchi ,  Yukihiro Yamashita ,  Jun Hasegawa

IPC分类号： G01N27/41 ,  F02D41/14 ,  G01N27/12 ,  G01N27/406 ,  G01N27/409 ,  G05D23/24 ,  G06F14/00

CPC分类号： G05D23/2401 ,  G01N27/4067 ,  G05D23/1928

摘要： In a heater control of an oxygen sensor, a heater control circuit is rendered fully conductive at 100% duty initially to supply full power to a heater until the resistance value of the heater reaches a predetermined initial value corresponding to a predetermined temperature. Then, the duty of the heater control circuit is feedback controlled so that the heater temperature becomes a target value until the internal resistance of the oxygen sensor reaches a target temperature, and further, after the internal resistance of the oxygen sensor S reaches the target temperature, the duty of the heater control circuit is feedback controlled so that the element temperature of the sensor becomes a target value.

摘要翻译： 在氧传感器的加热器控制中，加热器控制电路最初完全以100％的负载导通，以向加热器供电，直到加热器的电阻值达到对应于预定温度的预定初始值。 然后，反馈控制加热器控制电路的占空比，使得加热器温度成为目标值，直到氧传感器的内阻达到目标温度，此外，在氧传感器S的内阻达到目标温度 加热器控制电路的负载被反馈控制，使得传感器的元件温度成为目标值。

公开(公告)号：US06223730B1

公开(公告)日：2001-05-01

申请号：US09179203

申请日：1998-10-27

申请人： Jun Hasegawa ,  Yukihiro Yamashita ,  Daiji Isobe ,  Wakichi Kondo

发明人： Jun Hasegawa ,  Yukihiro Yamashita ,  Daiji Isobe ,  Wakichi Kondo

IPC分类号： F02M5100

CPC分类号： F02D41/061 ,  F02D41/047 ,  F02D2041/225 ,  F02D2200/0614

摘要： In a fuel injection control system for an internal combustion engine, a fuel atomization device is provided to atomize fuel injected at the time of engine starting. The fuel atomization device may be a type which increases fuel pressure to a higher value at the time of engine starting than after the engine starting. Alternatively, the fuel atomization device may be a type which supplies assist air to the injected fuel. An intake valve is opened for a longer period at the time of engine starting than after the engine starting, so that more fuel may be supplied to an engine cylinder. A fuel leakage which may occur during engine stop is estimated, and the amount of fuel to be injected at the time of next engine starting after the engine stop is corrected by the estimated amount of fuel leakage. Fuel injection timing at the time of engine starting is retarded relative to that of post-engine starting. The amount of injected fuel adhered to an intake port and not supplied into an engine cylinder after the closing of the intake valve is estimated, and the amount of fuel to be injected next is corrected thereby.

摘要翻译： 在用于内燃机的燃料喷射控制系统中，提供燃料雾化装置来雾化发动机起动时喷射的燃料。 燃料雾化装置可以是在发动机起动时将燃料压力提高到比发动机起动后更高的值。 或者，燃料雾化装置可以是向喷射的燃料供给辅助空气的类型。 在发动机启动时，进气阀在发动机起动之后打开较长时间，从而可以向发动机气缸供应更多的燃料。 估计在发动机停止期间可能发生的燃料泄漏，并且在发动机停止后的下一个发动机启动时要注入的燃料量通过估计的燃料泄漏量被校正。 发动机启动时的燃油喷射正时相对于发动机起动时间延迟。 估计在关闭进气门之后附着到进气口并且不供应到发动机气缸中的喷射燃料的量，并且由此修正接下来要喷射的燃料量。

公开(公告)号：US5964208A

公开(公告)日：1999-10-12

申请号：US878064

申请日：1997-06-18

申请人： Yukihiro Yamashita ,  Jun Hasegawa ,  Hisashi Iida ,  Wakichi Kondo ,  Yasuo Sagisaka ,  Masahiko Yamaguchi

发明人： Yukihiro Yamashita ,  Jun Hasegawa ,  Hisashi Iida ,  Wakichi Kondo ,  Yasuo Sagisaka ,  Masahiko Yamaguchi

IPC分类号： F02D41/14 ,  F02D41/22

CPC分类号： F02D41/1495 ,  F02D41/1456 ,  F02D41/22 ,  F02D2041/1432 ,  F02D41/1441 ,  Y02T10/40

摘要： An air/fuel ratio control system controls the supply of fuel to an internal combustion engine to achieve a target air/fuel ratio, based on the output of an air/fuel ratio sensor. The system may determine whether there is an abnormality in the air/fuel ratio sensor based on a comparison between a change of an air/fuel ratio correction coefficient, used to drive the air/fuel ratio to the target value, and a change of the target air/fuel ratio if the target air/fuel ratio has sharply changed. Alternatively, the diagnosis operation may be performed based on a comparison between a total air/fuel ratio correction amount and a change of the air/fuel ratio detected by the air/fuel ratio sensor, a phase difference calculation between peaks of the air/fuel ratio or the air/fuel ratio correction coefficient, or by accumulating the differences between the air/fuel ratio and the target air/fuel ratio, and the differences between the air/fuel ratio correction coefficient and a reference value, and comparing the accumulated values. In addition, the system may detect a sensor abnormality based on the deviation in phase of the air/fuel ratio from the air/fuel ratio correction coefficient. These diagnosis operations can precisely and easily detect the occurrence of an abnormality in the air/fuel ratio sensor. As a result, the air/fuel ratio control system will not use an imprecise output from the sensor for air/fuel ratio control, thus achieving highly precise and highly reliable air/fuel ratio control.

公开(公告)号：US5852228A

公开(公告)日：1998-12-22

申请号：US883590

申请日：1997-06-26

申请人： Yukihiro Yamashita ,  Hisashi Iida ,  Jun Hasegawa

发明人： Yukihiro Yamashita ,  Hisashi Iida ,  Jun Hasegawa

IPC分类号： F02D41/14 ,  G01N27/406

CPC分类号： F02D41/1476 ,  F02D41/1494 ,  G01N27/4067 ,  F02D41/1456

摘要： A sensing element of an oxygen sensor is controlled to keep a target impedance for maintaining activation temperature of the oxygen sensor. As the sensing element deteriorates, its internal impedance increases and power supply to a heater for heating the sensing element increases. The oxygen sensor temperature rises excessively above an activation temperature. To restrict excessive temperature rise, the target impedance is altered when the supply power to the heater exceeds a predetermined reference. The target impedance may be increased with increase in the power supply to the heater. Alternatively, the heater supply power is limited to a predetermined maximum for restricting excessive temperature rise.

公开(公告)号：US5579637A

公开(公告)日：1996-12-03

申请号：US451662

申请日：1995-05-26

申请人： Yukihiro Yamashita ,  Jun Hasegawa

发明人： Yukihiro Yamashita ,  Jun Hasegawa

IPC分类号： F01N3/24 ,  F02D41/14 ,  F01N3/28

CPC分类号： F02D41/148 ,  F02D41/1441 ,  F02D41/2454

摘要： An air-fuel ratio control apparatus for an engine for reliably converging an air-fuel ratio around a stoichiometric air-fuel ratio to prevent harmful exhaust components from being discharged into the air is described. The apparatus includes a CPU which determines an inversion direction of an output of an O.sub.2 sensor on the downstream side of a catalytic converter, corrects a target air-fuel ratio .lambda.TG in a step-like fashion in the opposite direction by a skip amount and calculates a fuel injection amount every injection timing on the basis of a difference between the corrected target air-fuel ratio .lambda.TG and an air-fuel ratio .lambda. detected by an O.sub.2 sensor on the upstream side of the exhaust flow. The target air-fuel ratio is reflected immediately in the fuel injection amount at an updating rate of every ilnjection timing, so that the fuel injection amount may be controlled with an excellent responsiveness to turbulence in the air-fuel ratio. Further, upper and lower limit guard values .lambda.TGL and .lambda.TGR for the target air-fuel ratio .lambda.TG are set based on a mass of absorbed substances in the catalytic converter after learning variations in the operating parameters of the downstream side O.sub.2 sensor and the like, so that large turbulence of the air-fuel ratio on the downstream side of the catalytic converter is suppressed and the air-fuel ratio may be reliably controlled around a stoichiometric air-fuel ratio.

摘要翻译： 一种发动机的空燃比控制装置，用于将空燃比围绕化学计量空燃比可靠地收敛，以防止有害排气成分排放到空气中。 该装置包括CPU，其确定催化转化器下游侧的O2传感器的输出的反转方向，以相反的方向以跳过量将阶梯式的目标空燃比λTG校正， 基于校正目标空燃比λTG与由排气流的上游侧的O2传感器检测出的空燃比λ之差来计算每个喷射正时的燃料喷射量。 目标空燃比以每次喷射正时的更新速度立即反映在燃料喷射量中，从而可以以对空燃比的湍流的良好响应性来控制燃料喷射量。 此外，目标空燃比λTG的上限和下限保护值λTLL和λTGR基于下游侧O2传感器的操作参数的变化和基于催化转化器中的吸收物质的质量来设定， 因此能够抑制催化转化器的下游侧的空燃比的大的紊乱，能够以理论空燃比为中心可靠地控制空燃比。