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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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43.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：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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45.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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公开(公告)号：US4586479A
公开(公告)日：1986-05-06
申请号：US596593
申请日：1984-04-04
申请人： Shigenori Isomura , Yasumasa Kaji
发明人： Shigenori Isomura , Yasumasa Kaji
CPC分类号： F02D41/062 , F02D41/102 , F02D41/107
摘要： In a fuel injection control system for an internal combustion engine, operating conditions of the engine are constantly monitored. A transient condition of the engine is detected from the monitored operating conditions. A fuel injection quantity is derived from the monitored operating conditions to effect injection at first intervals during the absence of the transient condition and at second intervals during the presence of the transient condition. Fuel injectors are activated in response to the derived fuel injection quantity.
摘要翻译： 在用于内燃机的燃料喷射控制系统中，不断监视发动机的运行状态。 从监测的运行条件检测发动机的瞬态情况。 燃料喷射量是从监视的操作条件导出的，以在不存在瞬态条件的情况下以第一间隔进行喷射，并且在瞬态条件的存在期间以第二间隔。 燃料喷射器响应于所得到的燃料喷射量被激活。
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48.发明授权
公开(公告)号：US4517948A
公开(公告)日：1985-05-21
申请号：US515788
申请日：1983-07-21
CPC分类号： F02D41/2454 , F02D41/2487 , F02B2075/027
摘要： An apparatus for controlling an air-fuel ratio in internal combustion engines has an RPM sensor, a combustion composition sensor, an intake air sensor and so on. Detection signals from these sensors are fetched by a microprocessor. A RAM is arranged in the microprocessor and is continuously supplied with power. The RAM has a first memory area which is divided into a plurality of areas for storing correction data corresponding to operating states of the engine. All the correction data stored in the first memory area are added together and the sum is divided by a given constant so as to obtain an updated correction amount. This updated correction amount is stored in a second memory area. The updated correction amount in the second memory area reflects the correction data stored in the first memory area. Given correction data stored in the first memory area is read out corresponding to a given intake air flow, thereby enabling feedback control.
摘要翻译： 用于控制内燃机中的空燃比的装置具有RPM传感器，燃烧成分传感器，进气传感器等。 来自这些传感器的检测信号由微处理器取出。 在微处理器中布置RAM并且连续地供电。 RAM具有第一存储区域，其被划分为用于存储与发动机的操作状态相对应的校正数据的多个区域。 将存储在第一存储区域中的所有校正数据相加在一起，并且将总和除以给定常数，以获得更新的校正量。 该更新校正量存储在第二存储区域中。 第二存储区域中更新的校正量反映存储在第一存储区域中的校正数据。 根据给定的进气流量，读出存储在第一存储区域中的校正数据，从而实现反馈控制。
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公开(公告)号：US4492202A
公开(公告)日：1985-01-08
申请号：US460856
申请日：1983-01-25
CPC分类号： F02D41/2412 , F02D31/007
摘要： A fuel injection control for an internal combustion engine having electromagnetic fuel injectors determines a basic fuel injection time width of a fuel injection pulse signal applied to the electromagnetic fuel injectors in accordance with detected conditions of engine operation parameters, stores maximum fuel injection time width values predetermined in correspondence to values of a predetermined one of the engine operation parameters, reads one of the predetermined maximum fuel injection time width values corresponding to the values of the predetermined engine operation parameter and corrects the same in accordance with the values of the other engine operation parameters, and corrects the basic fuel injection time width in accordance with the corrected predetermined maximum fuel injection time width value, thereby controlling the air-fuel ratio at a desired air-fuel ratio under every operating condition of the engine, while simultaneously preventing a misoperation of continuous fuel supply from occuring in the electromagnetic fuel injectors as before.
摘要翻译： 具有电磁燃料喷射器的内燃机的燃料喷射控制根据检测到的发动机运转参数的条件来决定施加到电磁燃料喷射器的燃料喷射脉冲信号的基本燃料喷射时间宽度，存储预定的最大燃料喷射时间宽度值 对应于预定的发动机运转参数的值，读取与预定的发动机运转参数的值相对应的预定最大燃料喷射时间宽度值之一，并根据其它发动机运转参数的值进行修正 并且根据校正的预定最大燃料喷射时间宽度值来校正基本燃料喷射时间宽度，从而在发动机的每个操作条件下将空燃比控制在期望的空燃比，同时防止误动作 连续燃油 如以前那样从电磁燃料喷射器中产生。
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