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公开(公告)号：US06263668B1
公开(公告)日：2001-07-24
申请号：US09668636
申请日：2000-09-25
IPC分类号： F01N310
CPC分类号： F01N3/0842 , F01N13/009 , F01N2250/12 , F01N2370/02 , F02D41/027 , F02D41/0275 , F02D41/1402 , F02D41/1456 , F02D41/1463 , F02D41/1475
摘要： In an engine exhaust system, an NOx catalyst for occluding NOx in a state of the lean air-fuel ratio and reducing the occluded NOx in the state of the rich air-fuel ration A CPU sets a target air-fuel ratio of a mixture supplied to an engine to the lean side with respect to the stoichiometric air-fuel ratio for the lean mixture combustion. The CPU sets a rich time for a rich mixture combustion in accordance with the engine operating state and the NOx purification rate in the NOx catalyst. In this moment, the shortest rich time is set within a range in which a desired NOx purification rate by the NOx catalyst is obtained. A three-way catalyst may be arranged upstream of the NOx catalyst. The three-way catalyst carries only a noble metal such as platinum having no oxygen storing capability.
摘要翻译： 在发动机排气系统中，在浓空燃比A CPU的状态下，以稀空燃比的状态吸入NOx的NO x催化剂和减少吸入的NOx，设定供给的混合物的目标空燃比 相对于贫混合物燃烧的化学计量空燃比，发动机到稀薄侧。 根据发动机运转状态和NOx催化剂的NOx净化率，CPU为丰富的混合燃烧设定了丰富的时间。 此时，将最短的富集时间设定在得到NOx催化剂的期望的NOx净化率的范围内。 可以在NOx催化剂的上游设置三元催化剂。 三元催化剂仅携带不具有氧气存储能力的铂等贵金属。
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公开(公告)号：US6148612A
公开(公告)日：2000-11-21
申请号：US166937
申请日：1998-10-06
CPC分类号： F01N3/0842 , F01N13/009 , F02D41/027 , F02D41/0275 , F02D41/1463 , F02D41/1475 , F01N2250/12 , F01N2370/02 , F02D41/1402 , F02D41/1456
摘要： In an engine exhaust system, an NOx catalyst for occluding NOx in a state of the lean air-fuel ratio and reducing the occluded NOx in the state of the rich air-fuel ratio. A CPU sets a target air-fuel ratio of a mixture supplied to an engine to the lean side with respect to the stoichiometric air-fuel ratio for the lean mixture combustion. The CPU sets a rich time for a rich mixture combustion in accordance with the engine operating state and the NOx purification rate in the NOx catalyst. In this moment, the shortest rich time is set within a range in which a desired NOx purification rate by the NOx catalyst is obtained. A three-way catalyst may be arranged upstream of the NOx catalyst. The three-way catalyst carries only a noble metal such as platinum having no oxygen storing capability.
摘要翻译： 在发动机排气系统中，在浓空燃比的状态下，在稀空燃比的状态下吸附NOx的NOx催化剂和减少封闭的NOx。 CPU将供给发动机的混合物的目标空燃比设定为相对于稀混合燃烧的理论空燃比。 根据发动机运转状态和NOx催化剂的NOx净化率，CPU为丰富的混合燃烧设定了丰富的时间。 此时，将最短的富集时间设定在得到NOx催化剂的期望的NOx净化率的范围内。 可以在NOx催化剂的上游设置三元催化剂。 三元催化剂仅携带不具有氧气存储能力的铂等贵金属。
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公开(公告)号：US5845489A
公开(公告)日：1998-12-08
申请号：US743741
申请日：1996-11-07
申请人： Hisayo Dohta , Shigenori Isomura , Katsuhiko Kawai
发明人： Hisayo Dohta , Shigenori Isomura , Katsuhiko Kawai
CPC分类号： F02D41/1441 , F01N11/00 , F01N11/007 , F01N2550/02 , F01N2550/14 , F01N2900/0421 , F02D41/1456 , Y02T10/47
摘要： An inflow quantity of an exhaust gas component flowing into a catalyst is calculated based upon air fuel ratio detected by an upstream air fuel ratio sensor which is provided on the upstream side of the catalyst. In addition, an outflow quantity of an exhaust gas component flowing out of the catalyst is calculated based upon air fuel ratio detected by a downstream air fuel ratio sensor which is provided on the downstream side of the catalyst. The quantity of an exhaust gas component absorbed by the catalyst can be detected in real time based upon a difference between the inflow quantity and outflow quantity. Thus, a state of the catalyst can be precisely detected in real time.
摘要翻译： 基于设置在催化剂的上游侧的上游空燃比传感器检测出的空燃比，计算流入催化剂的废气成分的流入量。 此外，基于设置在催化剂下游侧的下游空燃比传感器检测出的空燃比，计算出从催化剂流出的废气成分的流出量。 可以基于流入量和流出量之间的差异实时地检测催化剂吸收的废气成分的量。 因此，可以实时精确地检测催化剂的状态。
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4.发明授权Method and apparatus for detecting saturation gas amount absorbed by catalytic converter 失效用于检测催化转化器吸收的饱和气体量的方法和装置
公开(公告)号：US5622047A
公开(公告)日：1997-04-22
申请号：US318599
申请日：1994-10-05
CPC分类号： F02D41/1441 , F01N11/007 , F02D41/1477 , F01N2550/02 , F01N2900/0422 , Y02T10/47
摘要： In an apparatus for detecting a saturation gas amount absorbed by a catalytic converter disposed in an exhaust system of an engine, an air-to-fuel ratio detecting device is disposed in a region of the engine exhaust system downstream of the catalytic converter for monitoring exhaust gas, which has passed through the catalytic converter, to detect an air-to-fuel ratio of an air-fuel mixture causing the exhaust gas. An air-to-fuel ratio changing device serves to change an air-to-fuel ratio of an air-fuel mixture fed to the engine by a correction quantity in a given direction, and serves to maintain changing the air-to-fuel ratio during a correction time. A change increasing device serves to increase the correction quantity and/or the correction time by the air-to-fuel ratio changing device to execute an air-to-fuel ratio changing process again in cases where the air-to-fuel ratio detected by the air-to-fuel ratio detecting device does not vary even when the air-to-fuel ratio changing device executes changing the air-to-fuel ratio. A saturation gas amount calculating device serves to calculate a saturation gas amount absorbed by the catalytic converter on the basis of the correction quantity and the correction time in cases where the air-to-fuel ratio detected by the air-to-fuel ratio detecting device varies when the air-to-fuel ratio changing device executes changing the air-to-fuel ratio.
摘要翻译： 在用于检测由设置在发动机的排气系统中的催化转化器吸收的饱和气体量的装置中，空气 - 燃料比检测装置设置在用于监测排气的催化转化器的下游的发动机排气系统的区域 已经通过催化转化器的气体检测引起废气的空气 - 燃料混合物的空燃比。 空燃比改变装置用于通过给定方向的校正量来改变供给发动机的空气燃料混合物的空燃比，并且用于维持空燃比的变化 在修正时间。 变化增加装置用于通过空燃比改变装置增加校正量和/或校正时间，以在由空气 - 燃料比变化装置检测到的空燃比的情况下再次执行空燃比变更处理 空燃比检测装置即使当空燃比改变装置执行改变空燃比时也不变化。 饱和气体量计算装置用于根据空气 - 燃料比检测装置检测到的空气燃料比，基于校正量和校正时间来计算由催化转化器吸收的饱和气体量 当空燃比改变装置执行改变空燃比时，会发生变化。
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公开(公告)号：US5405521A
公开(公告)日：1995-04-11
申请号：US160094
申请日：1993-12-01
IPC分类号： G01N27/41 , F02D41/14 , G01N27/406 , G01N27/26
CPC分类号： F02D41/1476 , F02D41/1455 , F02D41/1496 , G01N27/4065 , F02D41/1456
摘要： An oxygen concentration measuring device capable of significantly shortening the period of time during which oxygen concentration cannot be measured. When measuring the temperature of a sensor main body, a microcomputer determines the temperature of the sensor main body by estimating a saturation current starting from a current detected by a current detecting circuit in a period of time before current flowing through the sensor main body finishes rising, after the sensor main body has been negatively biased by a bias control circuit. The sensor main body is positively biased by the bias control circuit directly after the period of time has lapsed. The microcomputer determines an air fuel ratio by using current in a period of time before current flowing through the sensor main body due to the positive bias finishes decreasing.
摘要翻译： 能够显着缩短不能测定氧浓度的时间的氧浓度测定装置。 当测量传感器主体的温度时，微型计算机通过在电流流过传感器主体的电流上升之前的一段时间内估计从由电流检测电路检测的电流开始的饱和电流来确定传感器主体的温度 在传感器主体被偏置控制电路负偏压之后。 传感器主体在经过一段时间后，由偏置控制电路正向偏置。 微型计算机通过在由于正偏压完成的电流流过传感器主体的电流之前的一段时间内通过使用电流来确定空燃比。
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公开(公告)号：US5390644A
公开(公告)日：1995-02-21
申请号：US996812
申请日：1992-12-23
申请人： Naochika Nunogaki , Minoru Ohta , Hirokatsu Mukai , Makoto Shirai , Toshihiro Suzumura , Shigenori Isomura , Tatsunori Kato , Hiroyuki Tatebayashi , Akihiro Oka
发明人： Naochika Nunogaki , Minoru Ohta , Hirokatsu Mukai , Makoto Shirai , Toshihiro Suzumura , Shigenori Isomura , Tatsunori Kato , Hiroyuki Tatebayashi , Akihiro Oka
CPC分类号： G01F1/696 , F02D41/0045 , G01F1/6842 , F02D41/0042
摘要： The present invention pertains to a method for producing a mixture including an injected engine fuel from an injector, a combustion engine intake-air and an evaporative gas from the engine fuel. The method includes the steps of measuring a characteristic of the evaporative gas and changing step for changing a mixing ratio of the evaporative gas to at least one of the injected engine fuel and the combustion engine intake-air, according to the measured characteristic of the evaporative gas, by changing a flow rate of the combustion engine intake-air.
摘要翻译： 本发明涉及一种制造混合物的方法，所述混合物包括来自喷射器的喷射发动机燃料，内燃机进气和来自发动机燃料的蒸发气体。 该方法包括以下步骤：根据蒸发气体的测量特性，测量蒸发气体的特性和改变蒸发气体与喷射的发动机燃料和内燃机吸入气中的至少一种的混合比的改变步骤 通过改变内燃机吸入空气的流量来实现。
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7.发明授权Self-diagnosis apparatus in system for prevention of scattering of fuel evaporation gas 失效用于防止燃料蒸发气体散射的系统中的自诊断装置
公开(公告)号：US5284050A
公开(公告)日：1994-02-08
申请号：US863091
申请日：1992-04-03
CPC分类号： F02M25/0809
摘要： There is disclosed a self-diagnosis apparatus in which when detecting a supply abnormally (i.e., failure to lead fuel evaporation gas into an intake passage), the abnormality can be accurately detected, taking into consideration variations in the fuel gas density (variations in the ambient temperature, variations in the volatility of the fuel, and etc.) due to the residual air in a fuel tank. In the apparatus, the amount of flow of the gas from the fuel tank to a canister can be detected, and a control circuit controls a purge valve to close a fuel gas discharge passage, and in this condition the control circuit detects the amount of flow of the gas from the fuel tank to the canister. When this flow amount exceeds a set value, the control circuit controls the purge valve to close and open the discharge passage, and judges in accordance with a change in an air-fuel ratio detected at this time by an O.sub.2 sensor whether or not any abnormality exists. If the control circuit judges by this judgment that there exists abnormality, the set value of the gas flow amount is set to a value greater than said set value, and the abnormality judgment is again effected. Then, if this judgment result still indicates that abnormality exists, a warning lamp is turned on to give warning.
摘要翻译： 公开了一种自诊断装置，其中当异常地检测供应（即，不能将燃料蒸发气体引入进气通道时），可以精确地检测异常，考虑到燃料气体密度的变化（在 由于燃料箱中的残留空气，环境温度，燃料挥发性的变化等）。 在该装置中，可以检测从燃料箱到罐的气体流量，控制电路控制净化阀关闭燃料气体排出通路，在该状态下，控制电路检测出流量 从燃料箱到罐的气体。 当该流量超过设定值时，控制回路控制净化阀关闭并打开排出通道，并根据由此使用O 2传感器检测的空燃比的变化来判断是否有异常 存在 如果控制电路判断出存在异常，则将气体流量的设定值设定为大于设定值的值，再次进行异常判定。 然后，如果该判断结果仍然表示存在异常，则警告灯亮起，发出警告。
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公开(公告)号：US4875443A
公开(公告)日：1989-10-24
申请号：US154373
申请日：1988-02-10
申请人： Ryuichi Sano , Shigenori Isomura
发明人： Ryuichi Sano , Shigenori Isomura
CPC分类号： F02D41/345 , F02D41/061 , F02N19/001 , Y02T10/44
摘要： In fuel injection system of an internal combustion engine of a vehicle, a fuel injection valve is activated to inject pre-start fuel in response to turn-on of a main switch by a vehicle driver. A starter motor is not activated until a predetermined delay period (T.sub.D) elapses after the turn-on of the main switch. During the delay period (T.sub.D) the injected fuel is vaporized. After the delay period (T.sub.D) the vaporized fuel is taken into engine cylinders when the engine is cranked by the starter motor so that fuel is ignited in the engine easily.
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9.发明授权Apparatus and method for injecting fuel into engine according to group injection system 失效根据组注射系统将燃料喷入发动机的装置和方法
公开(公告)号：US4706196A
公开(公告)日：1987-11-10
申请号：US763795
申请日：1985-08-08
CPC分类号： F02D41/345 , Y02T10/44
摘要： In apparatus for injecting fuel into an internal combustion engine, a flip-flop used for frequency dividing an engine rotational angle signal is arranged to be reset when a basic injection pulse is not coincident with a cylinder-determining pulse signal. The basic injection pulse is produced by a Q/N charge-discharge circuit arranged to start charging a capacitor in response to a leading edge of an output pulse from the flip-flop and to start discharging the same in response to a trailing edge of the same where time constant on charging is constant and time constant on discharging is variable depending on the quantity Q of intake air of the engine. The basic injection pulse is used to produce final injection pulse with which fuel injection valves are operated where the width of the basic injection pulse determines the basic amount of fuel to be injected. After the flip-flop is reset, its output pulse is shifted by 180.degree. CA, and thus the basic injection pulse TP occurs just before the final injection pulse thereby the latest engine operating conditions are reflected on the amount of fuel to be injected.
摘要翻译： 在将燃料喷射到内燃机中的装置中，用于分频发动机转角信号的触发器被布置为当基本喷射脉冲与气缸确定脉冲信号不一致时被复位。 基本注入脉冲由Q / N充电 - 放电电路产生，Q / N充电 - 放电电路被布置为响应于来自触发器的输出脉冲的前沿开始对电容器充电，并响应于触发器的后沿开始放电 同样的，充电时间常数恒定，放电时间常数根据发动机进气量Q可变。 基本喷射脉冲用于产生最终喷射脉冲，在该喷射脉冲下，基本喷射脉冲的宽度决定喷射的燃料的基本量。 在触发器复位之后，其输出脉冲偏移180°CA，因此基本注入脉冲TP恰好在最终喷射脉冲之前发生，从而最新的发动机工作条件反映在待喷射燃料量上。
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公开(公告)号：US4646698A
公开(公告)日：1987-03-03
申请号：US760249
申请日：1985-07-29
申请人： Hidehiko Inoue , Toshio Kondo , Shigenori Isomura
发明人： Hidehiko Inoue , Toshio Kondo , Shigenori Isomura
CPC分类号： F02D41/045 , F02D41/18 , F02D41/32 , F02D41/345 , Y02T10/44
摘要： An electronically controlled fuel injection system for an internal combustion engine, the system being of the type which controls fuel injection using the charging and discharging of a capacitor and comprising engine operating parameter sensors, a capacitor, and a control unit for controlling the charging and discharging of the capacitor. The charging of the capacitor is initiated at a timing determined as a function of engine speed and throttle opening angle and the discharging thereof is initiated subsequently to the completion of the charging. The charging time period is determined by engine speed and the discharging current is determined by intake air quantity. A basic fuel injection signal is produced so as to have a pulse duration equal to the discharging time period.
摘要翻译： 一种用于内燃机的电子控制燃料喷射系统，该系统是使用电容器的充电和放电来控制燃料喷射的系统，并且包括发动机操作参数传感器，电容器和用于控制充放电的控制单元 的电容器。 电容器的充电在根据发动机转速和节气门开度角确定的时间开始，并且在充电完成之后开始放电。 充电时间由发动机转速确定，放电电流由进气量决定。 产生基本燃料喷射信号，使其具有等于放电时间段的脉冲持续时间。
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