公开(公告)号：US4751907A

公开(公告)日：1988-06-21

申请号：US906949

申请日：1986-09-15

申请人： Tadahiro Yamamoto ,  Eiichi Ohnishi ,  Tadaki Oota ,  Hiroaki Oogane ,  Minoru Osuga ,  Yoshishige Oyama

发明人： Tadahiro Yamamoto ,  Eiichi Ohnishi ,  Tadaki Oota ,  Hiroaki Oogane ,  Minoru Osuga ,  Yoshishige Oyama

IPC分类号： F02D35/00 ,  F02D41/14 ,  G01N27/406 ,  G01N31/22

CPC分类号： G01N27/4065 ,  F02D35/003 ,  F02D41/2441 ,  F02D41/2474 ,  F02D41/2454

摘要： In an A/F ratio sensor of mixture supplied for an internal combustion engine, which has a detector for detecting the concentration of residual oxygen in exhaust gas and determines the A/F ratio by retrieving an air excess ratio table with an output of the detector, there is further provided an additional air introducing device, which introduces a predetermined quantity of air into the engine for a certain period of time, under the condition that the velocity of air flowing through a throttle valve is equal to the sonic velocity. The oxygen concentration detector is calibrated by the comparison of the outputs thereof before and after introduction of the additional air. According to this invention, the A/F ratio of the mixture can be detected accurately without the influence of the aged deterioration of the oxygen concentration.

摘要翻译： 在供给用于内燃机的混合物的A / F比传感器中，其具有用于检测废气中的残余氧浓度的检测器，并且通过用检测器的输出检索空气过剩率表来确定A / F比 进一步提供了一种额外的空气引入装置，其在流过节流阀的空气的速度等于声速的条件下，将预定量的空气引入发动机中一段时间​​。 通过在引入附加空气之前和之后的输出的比较来校准氧浓度检测器。 根据本发明，可以准确地检测混合物的A / F比，而不会受到氧浓度老化的影响。

公开(公告)号：US4501709A

公开(公告)日：1985-02-26

申请号：US566405

申请日：1983-12-28

申请人： Tadahiro Yamamoto ,  Tadaki Oota

发明人： Tadahiro Yamamoto ,  Tadaki Oota

IPC分类号： F02M9/127 ,  F02M9/14

CPC分类号： F02M9/1275 ,  Y10S261/56

摘要： A variable venturi carburetor comprises an auxiliary intake air passage, an auxiliary variable venturi and a non-adjustable nozzle portion, in addition to a main intake air passage, a main variable venturi and an adjustable nozzle portion. If the amount of intake air is small as when the engine is being idled, intake air is passed mainly through the auxiliary variable venturi to generate vacuum sufficiently high to jet fuel into the auxiliary intake passage through the non-adjustable nozzle portion. If the amount of intake air is great as when the engine is running under a heavy load, intake air is passed mainly through the main variable venturi. Since two venturis are formed, it is possible to smoothly increase the amount of fuel to be jetted into the intake passage over a wide engine operating condition.

摘要翻译： 除了主进气通道，主可变文丘里管和可调喷嘴部分之外，可变文丘里化油器包括辅助进气通道，辅助可变文丘里管和不可调喷嘴部分。 如果当发动机空转时进气量小，则进气主要通过辅助可变文丘里管，以产生足够高的真空，从而通过不可调节的喷嘴部分将燃料喷射到辅助进气通道中。 如果当发动机在重载下运行时进气量大，则进气主要通过主可变文丘里管。 由于形成了两个通风口，因此能够在较宽的发动机运转状况下平稳地增加喷射到进气通路内的燃料量。

公开(公告)号：US4579097A

公开(公告)日：1986-04-01

申请号：US619306

申请日：1984-06-11

申请人： Tadahiro Yamamoto ,  Tadaki Oota

发明人： Tadahiro Yamamoto ,  Tadaki Oota

IPC分类号： F02B1/04 ,  F02M9/133 ,  F02M17/08 ,  F02M7/00

CPC分类号： F02M9/133 ,  F02M17/08 ,  F02B1/04

摘要： A first temperature sensor senses the temperature of intake air supplied to an internal combustion engine before the intake air is mixed with fuel supplied thereto. A second temperature sensor senses the temperature of the mixture of the intake air and fuel within the intake air passage. A control unit controls the fuel injection quantity in accordance with the difference between the sensed temperatures, thereby causing the actual air-fuel ratio to coincide with a desired air-fuel ratio. The desired air-fuel ratio is adjusted in accordance with the throttling effect of a throttle valve in the intake air passage and with engine speed.

摘要翻译： 第一温度传感器感测在进气与供给的燃料混合之前供应到内燃机的进气的温度。 第二温度传感器感测吸入空气通道内的进气和燃料的混合物的温度。 控制单元根据感测到的温度之间的差来控制燃料喷射量，从而使实际空燃比与期望的空燃比一致。 根据进气通道中的节流阀的节流效果和发动机转速来调节所需的空燃比。

公开(公告)号：US5622048A

公开(公告)日：1997-04-22

申请号：US403661

申请日：1995-03-14

申请人： Takashi Aoyama ,  Tadaki Oota

发明人： Takashi Aoyama ,  Tadaki Oota

IPC分类号： F01N3/20 ,  F01N3/24 ,  F01N11/00 ,  F02D41/02 ,  F02D41/14

CPC分类号： F02D41/1486 ,  F01N11/007 ,  F01N3/20 ,  F02D41/027 ,  F02D41/1446 ,  F01N2550/02 ,  Y02T10/47

摘要： To restore the efficiency of a platinum catalyst used for engine exhaust purification that has temporarily deteriorated through oxidation, the stoichiometric air-fuel ratio, or an air-fuel ratio set to a richer value than the stoichiometric air-fuel ratio of the air-fuel mixture supplied to the engine, is applied. The engine running condition and a decrease of catalyst oxidation are detected, and a recovery treatment temperature depending on the degree of oxidation is set. An engine running condition range suited to performing recovery treatment is set based on this recovery treatment temperature. By determining whether or not the running condition is within this range and applying a recovery treatment air-fuel ratio, recovery treatment is performed only under conditions satisfying the recovery treatment temperature. Recovery treatment is therefore performed efficiently, while increase of fuel costs and worsening of exhaust gas composition due to recovery treatment at low temperature are kept to a minimum.

摘要翻译： 为了恢复用于通过氧化暂时劣化的发动机排气净化的铂催化剂的效率，设定为比空气燃料的理论空燃比更丰富的空燃比的理论空燃比 适用于发动机的混合物。 检测发动机运转状态和催化剂氧化的降低，设定与氧化度有关的回收处理温度。 基于该恢复处理温度设定适于进行恢复处理的发动机运转状态范围。 通过判定运行状态是否在该范围内并且应用恢复处理空燃比，仅在满足恢复处理温度的条件下进行恢复处理。 因此，能够有效地进行回收处理，同时由于低温下的回收处理而导致的燃料成本的上升和排气组成的恶化保持最小。

公开(公告)号：US5090389A

公开(公告)日：1992-02-25

申请号：US593404

申请日：1990-10-05

申请人： Tadaki Oota

发明人： Tadaki Oota

IPC分类号： F02D19/08 ,  F02D41/00 ,  F02D41/14 ,  F02D41/22

CPC分类号： F02D41/0025 ,  F02D19/0623 ,  F02D19/084 ,  F02D19/087 ,  F02D41/1441 ,  F02D41/222 ,  F02D2200/0611 ,  Y02T10/36 ,  Y02T10/40

摘要： A fuel delivery control apparatus for use with an engine operable on either of gasoline fuel and gasoline/alcohol fuel blend. The amount of fuel metered to the engine is controlled based upon engine operating conditions. A first correction factor is set at a value calculated based upon a signal from an alcohol concentration sensor to correct the amount of fuel metered to the engine. A second correction factor is set based upon a signal from an oxygen sensor to correct the amount of fuel metered to the engine so as to provide an air/fuel ratio feedback control. In the event of failure of the alcohol concentration sensor, the first correction factor is estimated by modifying it based upon the signal from the oxygen sensor and a difference between the calculated and estimated values of the first correction factor is calculated. The first correction factor is set at the estimated value when the calculated difference is out of a predetermined range and at the calculated value when the calculated difference is within the acceptable range.

摘要翻译： 一种与可在汽油燃料和汽油/醇燃料混合物中的任何一种操作的发动机一起使用的燃料输送控制装置。 根据发动机运行条件控制计量到发动机的燃料量。 第一校正因子被设定为基于来自酒精浓度传感器的信号计算的值，以校正计量到发动机的燃料量。 基于来自氧传感器的信号来设定第二校正因子，以校正计量到发动机的燃料量，以提供空燃比反馈控制。 在酒精浓度传感器发生故障的情况下，通过根据来自氧传感器的信号修改第一校正因子来估计第一校正因子，并计算第一校正因子的计算值和估计值之间的差。 当计算出的差在预定范围之外时，将第一校正因子设置在估计值，并且当计算出的差在可接受范围内时，将其设定为计算值。

公开(公告)号：US5170363A

公开(公告)日：1992-12-08

申请号：US592950

申请日：1990-10-04

申请人： Toshio Hirota ,  Tadaki Oota

发明人： Toshio Hirota ,  Tadaki Oota

IPC分类号： B60K15/06 ,  G01D7/00 ,  G01F23/00

CPC分类号： B60K15/061 ,  G01F23/0076

摘要： A fuel gauge system is disclosed, which includes a first device capable of visually indicating the amount of the mixed fuel in the container; a second device for detecting a real amount of the fuel in the container; a third device for detecting the mixing ratio of compositions in the mixed fuel; a fourth device for determining a critical effective amount of the mixed fuel in accordance with the fuel mixing ratio detected by the third device; a fifth device for judging whether the real amount is less than the critical effective amount or not; a sixth device for determining, based on the fuel mixing ratio detected and the real amount, a value corresponding to a calorific power possessed by the mixed fuel in the container; and a seventh device for controlling the first device in such a manner that, when the real amount is less than the critical effective amount, the first device indicates the value corresponding to the calorific power possessed by the mixed fuel in the container, and when the real amount is not less than the critical effective amount and the container is filled with the mixed fuel, the first device indicates the real amount of the mixed fuel by volume.

摘要翻译： 公开了一种燃油表系统，其包括能够在视觉上指示容器中的混合燃料的量的第一装置; 用于检测容器中燃料的实际量的第二装置; 用于检测混合燃料中组合物的混合比例的第三装置; 第四装置，用于根据由第三装置检测的燃料混合比来确定混合燃料的临界有效量; 用于判断实际量是否小于临界有效量的第五装置; 第六装置，用于基于所检测的燃料混合比和实际量确定与所述容器中的混合燃料所具有的发热量相对应的值; 以及第七装置，用于以实际量小于临界有效量的方式控制第一装置，第一装置指示对应于容器中的混合燃料的发热量的值，并且当 实际量不小于临界有效量，并且容器充满混合燃料，第一装置以体积表示混合燃料的实际量。

公开(公告)号：US4986241A

公开(公告)日：1991-01-22

申请号：US483029

申请日：1990-02-21

申请人： Ryuzaburo Inoue ,  Tadaki Oota

发明人： Ryuzaburo Inoue ,  Tadaki Oota

IPC分类号： F02D19/08 ,  F02D41/00 ,  F02D41/14 ,  F02D41/22

CPC分类号： F02D19/087 ,  F02D19/0623 ,  F02D19/084 ,  F02D41/0025 ,  F02D41/1441 ,  F02D41/149 ,  F02D41/222 ,  F02D2200/0611 ,  Y02T10/36

摘要： If an alcohol sensor which determines the amount of alcohol which is mixed with gasoline, malfunctions, the fuel supply correction factor which is designed to modify the basic fuel supply amount to compensate for the amount of alcohol, is prevented from being changed in accordance with the output of the alcohol sensor, and temporarily calibrated by feedback from the air-fuel ratio sensor disposed in the exhaust system.

摘要翻译： 如果确定与汽油混合的酒精量的酒精传感器发生故障，则防止改变基本燃料供应量以补偿醇的量的燃料供应修正因子根据 输出酒精传感器，并通过设置在排气系统中的空燃比传感器的反馈来临时校准。

公开(公告)号：US4982709A

公开(公告)日：1991-01-08

申请号：US495970

申请日：1990-03-20

申请人： Tadaki Oota

发明人： Tadaki Oota

IPC分类号： F02D41/16 ,  F02D31/00 ,  F02D41/00

CPC分类号： F02D41/0025 ,  F02D19/0628 ,  F02D19/084 ,  F02D19/087 ,  F02D31/009 ,  F02D2200/0611 ,  Y02T10/36

摘要： An apparatus for use with an internal combustion engine operable on either of gasoline fuel, alcohol fuel and gasoline/alcohol fuel blend. The apparatus comprises an alcohol concentration sensor for producing a signal indicative of an alcohol concentration of the fuel to be delivered to the engine, an oxygen sensor for producing a signal indicative of an oxygen content of exhaust gases discharged from the engine, and an engine coolant temperature sensor for producing a signal indicative of an engine coolant temperature. A control unit is coupled to the alcohol-concentration, oxygen and engine-coolant-temperature sensors. The control unit is responsive to the air/fuel ratio feedback signal for correcting the fuel supplied to the engine to maintain a desired air/fuel ratio when the sensed engine coolant temperature exceeds a predetermined value. The control unit is also responsive to an idle engine condition for calculating a target value for engine idling speed as a function of alcohol concentration and engine coolant temperature when the coolant temperature is below the predetermined value. An engine speed control device is coupled to the control unit for adjusting the engine speed at the calculated target value.

摘要翻译： 一种与可在汽油燃料，酒精燃料和汽油/醇燃料混合物中的任何一种操作的内燃机一起使用的装置。 该装置包括用于产生指示要输送到发动机的燃料的酒精浓度的信号的酒精浓度传感器，用于产生指示从发动机排出的排气的氧含量的信号的氧传感器，以及发动机冷却剂 温度传感器，用于产生指示发动机冷却剂温度的信号。 控制单元耦合到酒精浓度，氧气和发动机冷却剂温度传感器。 当感测的发动机冷却剂温度超过预定值时，控制单元响应于空气/燃料比反馈信号，用于校正供应到发动机的燃料以保持期望的空气/燃料比。 当冷却剂温度低于预定值时，控制单元还响应于空转发动机状况，以计算作为酒精浓度和发动机冷却剂温度的函数的发动机空转速度的目标值。 发动机转速控制装置与控制单元连接，用于根据计算出的目标值来调节发动机转速。