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    • 4. 发明授权
    • Air/fuel ratio control system of internal combustion engine
    • 内燃机空燃比控制系统
    • US06381954B1
    • 2002-05-07
    • US09873205
    • 2001-06-05
    • Masatomo KakuyamaAkira TayamaHirofumi TsuchidaOsamu Matsuno
    • Masatomo KakuyamaAkira TayamaHirofumi TsuchidaOsamu Matsuno
    • F01N300
    • F02D41/0295F02D41/1456F02D2200/0814F02D2200/0816
    • In an automotive vehicle with at least one catalyst located in an exhaust passage for adsorbing oxygen contained within exhaust gases entering the catalyst, and an air/fuel ratio sensor located in the exhaust passage upstream of the catalyst for detecting an air/fuel ratio based on a percentage of oxygen contained within the exhaust gases flowing through the exhaust passage and entering the catalyst, an air/fuel ratio control system controls an air/fuel mixture ratio of the engine at as close to stoichiometric as possible, an air/fuel ratio control system calculates a quantity of oxygen stored in the catalyst on the basis of a deviation of the air/fuel ratio detected by the air/fuel ratio sensor from a stoichiometric air/fuel ratio to produce informational data indicative of a calculated value of the quantity of oxygen stored. The control system controls the air/fuel mixture ratio of the engine so that the calculated value of the quantity of oxygen stored is adjusted to a desired value. The control system has a limiter capable of preventing the calculated value of the quantity of oxygen stored from exceeding a specified level.
    • 在具有位于排气通道中的至少一种催化剂的机动车辆中,用于吸附进入催化剂的废气中所含的氧气;以及空气/燃料比传感器,位于催化剂上游,用于检测空燃比,基于 空气/燃料比控制系统控制发动机的空气/燃料混合比在尽可能接近化学计量的空气/燃料比控制 系统基于由空气/燃料比传感器检测的空气/燃料比与化学计量空气/燃料比的偏差来计算存储在催化剂中的氧气的量,以产生指示计算值的计算值的信息数据 氧气储存。 控制系统控制发动机的空气/燃料混合比,使得存储的氧气量的计算值被调节到期望值。 控制系统具有限制器,其能够防止存储的氧气的量的计算值超过指定水平。
    • 5. 发明授权
    • Exhaust gas purifying system for internal combustion engine
    • 内燃机排气净化系统
    • US06497846B1
    • 2002-12-24
    • US09370885
    • 1999-08-10
    • Keiji OkadaKazuhiko KanetoshiHirofumi TsuchidaAkira Tayama
    • Keiji OkadaKazuhiko KanetoshiHirofumi TsuchidaAkira Tayama
    • F01N300
    • F01N3/0835B01D53/944B01D53/9495F01N3/0814F01N3/0871F01N3/2828F02B2075/125F02D41/0255F02D41/402F02D41/405F02D2041/389F02D2200/0802Y02T10/123Y02T10/26Y02T10/44
    • An exhaust gas purifying system for a cylinder direct internal combustion engine having a fuel injector valve for directly injecting fuel into a combustion chamber of the engine. The exhaust gas purifying system comprises an adsorbent catalytic converter disposed in an exhaust gas passageway of the engine. The adsorbent catalytic converter including a catalytic element having an adsorption layer. The adsorption layer contains an adsorbent for adsorbing HC (hydrocarbons) of exhaust gas in a first temperature range and to release the adsorbed HC in a second temperature range which is high relative to the first temperature range, and a catalyst component for promoting reaction for oxidizing HC which is released from the adsorbent. A control unit is provided to be programmed to carry out (a) judging that a temperature of the adsorption layer has reaches a releasing level relating to the second temperature range, so as to make a first judgment result; (b) judging that a temperature of exhaust gas flown into the adsorbent catalytic converter will rise upon injection of an additional fuel from the fuel injector valve into the combustion chamber during a time period including an expansion stroke and an exhaust stroke of the engine, so as to make a second judgment result; and (c) causing the fuel injector valve to controllably inject the additional fuel during the time period including the expansion stroke and the exhaust stroke of the engine upon making both the first and second judgment results.
    • 一种用于汽缸直接内燃机的排气净化系统,其具有用于将燃料直接喷射到发动机的燃烧室中的燃料喷射阀。 排气净化系统包括设置在发动机的排气通道中的吸附催化转化器。 该吸附剂催化转化器包括具有吸附层的催化元件。 吸附层含有用于在第一温度范围内吸附废气的HC(烃)的吸附剂,并且在相对于第一温度范围高的第二温度范围内释放吸附的HC,以及用于促进氧化反应的催化剂组分 HC从吸附剂中释放出来。 提供控制单元进行编程以执行(a)判断吸附层的温度达到与第二温度范围有关的释放水平,以便作出第一判断结果; (b)判断在包括发动机的膨胀冲程和排气冲程在内的时间段期间,从燃料喷射阀向燃烧室喷射附加燃料时,判断流入吸附剂催化转化器的废气的温度升高,因此 作出第二判断结果; 以及(c)在进行第一和第二判断结果的同时,在包括发动机的膨胀冲程和排气冲程的时间段期间使燃料喷射阀可控制地喷射附加燃料。
    • 8. 发明授权
    • Air/fuel ration control system of internal combustion engine
    • 内燃机空气/燃料配给控制系统
    • US06282889B1
    • 2001-09-04
    • US09516498
    • 2000-03-01
    • Masatomo KakuyamaAkira TayamaHirofumi TsuchidaOsamu Matsuno
    • Masatomo KakuyamaAkira TayamaHirofumi TsuchidaOsamu Matsuno
    • F01N300
    • F02D41/0295F02D41/1456F02D2200/0814F02D2200/0816
    • In an automotive vehicle with at least one catalyst located in an exhaust passage for adsorbing oxygen contained within exhaust gases entering the catalyst, and an air/fuel ratio sensor located in the exhaust passage upstream of the catalyst for detecting an air/fuel ratio based on a percentage of oxygen contained within the exhaust gases flowing through the exhaust passage and entering the catalyst, an air/fuel ratio control system controls an air/fuel mixture ratio of the engine at as close to stoichiometric as possible, an air/fuel ratio control system calculates a quantity of oxygen stored in the catalyst on the basis of a deviation of the air/fuel ratio detected by the air/fuel ratio sensor from a stoichiometric air/fuel ratio to produce informational data indicative of a calculated value of the quantity of oxygen stored. The control system controls the air/fuel mixture ratio of the engine so that the calculated value of the quantity of oxygen stored is adjusted to a desired value. The control system has a limiter capable of preventing the calculated value of the quantity of oxygen stored from exceeding a specified level.
    • 在具有位于排气通道中的至少一种催化剂的机动车辆中,用于吸附进入催化剂的废气中所含的氧气;以及空气/燃料比传感器,位于催化剂上游,用于检测空燃比,基于 空气/燃料比控制系统控制发动机的空气/燃料混合比在尽可能接近化学计量的空气/燃料比控制 系统基于由空气/燃料比传感器检测的空气/燃料比与化学计量空气/燃料比的偏差来计算存储在催化剂中的氧气的量,以产生指示计算值的计算值的信息数据 氧气储存。 控制系统控制发动机的空气/燃料混合比,使得存储的氧气量的计算值被调节到期望值。 控制系统具有限制器,其能够防止存储的氧的量的计算值超过规定的水平。
    • 10. 发明授权
    • Air-fuel ratio controller and method of controlling air-fuel ratio
    • 空燃比控制器和空燃比控制方法
    • US06314724B1
    • 2001-11-13
    • US09715181
    • 2000-11-20
    • Masatomo KakuyamaAkira TayamaHirofumi TsuchidaShigeaki Kakizaki
    • Masatomo KakuyamaAkira TayamaHirofumi TsuchidaShigeaki Kakizaki
    • F01N300
    • F02D41/0295F02D35/023F02D41/187F02D2200/0404F02D2200/0814F02D2200/1015F02D2200/501
    • An air-fuel ratio controller for an internal combustion engine with a catalytic converter in an exhaust passage has an air-fuel ratio sensor, an engine sensor, and a control unit. The air-fuel ratio sensor produces a signal indicative of an air-fuel ratio of an exhaust gas in the exhaust passage on an upstream side of the catalytic converter. The engine sensor produces a signal indicative of misfiring of the engine. The control unit is operatively coupled to the air-fuel ratio sensor and the engine sensor. The control unit computes an estimated quantity of oxygen to be stored in the catalytic converter based on the signal from the air-fuel ratio sensor, and determines if the engine is misfiring based on the signal from the engine sensor. The control unit also produces an estimated adjustment value and adjusts an air-fuel ratio of intake air based on the estimated adjustment value such that the estimated quantity of oxygen to be stored substantially coincides with a predetermined target quantity of oxygen to be stored. However, when misfiring is determined based on the signal from the engine sensor, the computation of the estimated quantity of oxygen to be stored is stopped or not used, and a predetermined value is used to control the air-fuel ratio of intake air. With the air-fuel ratio controller of the present invention, influence of misfiring on air-fuel ratio control can be reduced.
    • 用于具有排气通道中的催化转化器的内燃机的空燃比控制器具有空燃比传感器,发动机传感器和控制单元。 空燃比传感器产生表示催化转化器上游侧的排气通道中的废气的空燃比的信号。 发动机传感器产生指示发动机失火的信号。 控制单元可操作地联接到空燃比传感器和发动机传感器。 控制单元基于来自空燃比传感器的信号计算要存储在催化转化器中的氧气的估计量,并且基于来自发动机传感器的信号来确定发动机是否发动机失火。 控制单元还产生估计的调整值,并且基于估计的调整值调节进气的空燃比,使得待储存的氧气的估计量基本上与要存储的预定目标氧气量一致。 然而,当基于来自发动机传感器的信号确定失火时,停止或不使用要储存的氧气的估计量的计算,并且使用预定值来控制进气的空燃比。 利用本发明的空燃比控制器,可以减少对空燃比控制的失火的影响。