Method for computing a compensation value for an engine having
electronic fuel injection control
    2.
    发明授权
    Method for computing a compensation value for an engine having electronic fuel injection control 失效
    用于计算具有电子燃料喷射控制的发动机的补偿值的方法

    公开(公告)号:US4413601A

    公开(公告)日:1983-11-08

    申请号:US326074

    申请日:1981-11-30

    摘要: A compensation value computing method for an electronic fuel injection controlled engine according to this invention measures an operating parameter for detecting the idling, low-load and high-load running conditions of the engine. First, second and third memory locations are provided corresponding, respectively, to these running conditions of the engine to compute feedback air-fuel ratios on the basis of feedback signals from an air-fuel ratio sensor. Values in the memory are compensated corresponding to the detected running conditions of the engine on the basis of the deviation of a feedback air-fuel ratio from the base air-fuel ratio. When the values in at least two memory locations differ from the base value by not less than a predetermined value, the altimetric compensation value is adjusted and when the difference between values in the first and third memories is larger than that between values in the second and third memories, the output compensation value of an air flow meter for detecting intake air flow is adjusted.

    摘要翻译: 根据本发明的用于电子燃料喷射控制发动机的补偿值计算方法测量用于检测发动机的怠速,低负载和高负荷运行状况的操作参数。 第一,第二和第三存储器位置分别对应于发动机的这些运行状态,以基于来自空燃比传感器的反馈信号来计算反馈空燃比。 基于反馈空燃比与基本空燃比的偏差,对应于检测到的发动机的运行状态对存储器中的值进行补偿。 当至少两个存储器位置中的值不同于基准值不小于预定值时,调整高度补偿值,并且当第一和第三存储器中的值之间的差值大于第二和第三存储器中的值之间的差值时, 第三存储器,调节用于检测进气流量的空气流量计的输出补偿值。

    Exhaust gas purification device for an engine
    3.
    发明授权
    Exhaust gas purification device for an engine 失效
    发动机废气净化装置

    公开(公告)号:US5746052A

    公开(公告)日:1998-05-05

    申请号:US525892

    申请日:1995-09-08

    摘要: In the present invention, the exhaust gas from the engine is divided into a first and a second branch exhaust passages after it passes through a three-way reducing and oxidizing catalyst, and the two branch exhaust passages merge into an exhaust gas outlet passage. In the first branch exhaust passage, an oxidizing catalyst is disposed, and in the exhaust gas outlet passage, a denitrating and oxidizing catalyst is disposed. NO.sub.x in the exhaust gas from the engine is all converted to N.sub.2 and NH.sub.3 by the three-way reducing and oxidizing catalyst and a part of the NH.sub.3 generated by the three-way catalyst flows into the first branch exhaust passage and is converted to NO.sub.x again by the oxidizing catalyst. The amount of NO.sub.x produced by the oxidizing catalyst and the amount of NO.sub.x flowing through the second branch exhaust passage is determined by the flow distribution ratio of the first and the second branch exhaust passages. In this invention, the flow ratio is determined in such a manner that the amount of the NO.sub.x produced by the oxidizing catalyst and the amount of the NH.sub.3 passing through the second branch exhaust passage are stoichiometric to produce N.sub.2 and H.sub.2 O. Therefore, when these exhaust gases flow into the denitrating and oxidizing catalyst after they mix with each other in the exhaust gas outlet passage, all the NO.sub.x and the NH.sub.3 are converted to N.sub.2 and H.sub.2 O by the denitrating and oxidizing catalyst without producing any surplus NO.sub.x or NH.sub.3.

    摘要翻译: 在本发明中,来自发动机的废气在通过三通还原氧化催化剂后被分成第一和第二分支排气通道,两个分支排气通道合流到废气出口通道中。 在第一分支排气通道中设置氧化催化剂,并且在排气出口通道中设置脱硝和氧化催化剂。 来自发动机的废气中的NOx通过三元还原氧化催化剂全部转化为N 2和NH 3,并且由三元催化剂产生的一部分NH 3流入第一分支排气通道并再次转化为NOx 通过氧化催化剂。 由氧化催化剂产生的NOx的量和流过第二分支排气通道的NOx的量由第一和第二分支排气通道的流量分配比确定。 在本发明中,流量比以如下方式确定:氧化催化剂产生的NOx的量和通过第二分支排气通道的NH 3的量是化学计量的,以产生N 2和H 2 O. 因此,当这些废气在废气出口通道中彼此混合后流入脱硝和氧化催化剂时,所有的NOx和NH 3都被脱硝和氧化催化剂转化为N 2和H 2 O,而不产生任何剩余的NOx或 NH3。

    Fuel injection system for an internal combustion engine
    6.
    发明授权
    Fuel injection system for an internal combustion engine 失效
    内燃机燃油喷射系统

    公开(公告)号:US4700681A

    公开(公告)日:1987-10-20

    申请号:US849176

    申请日:1986-04-07

    摘要: A fuel injection system for a multi-cylinder internal combustion engine wherein fuel injectors are provided for each of the cylinders. The injectors are divided into two groups, the cylinders in each of the groups having operational phases which are spaced from each other by a crank angle of 360 degrees. Injection systems are provided for each group for attaining independent injections between the groups. In each of the groups, a basic amount of fuel for one engine cycle, and then a final injection amount, is calculated, as a difference of the basic amount with respect to the actual amount of fuel injected during a preceding injection of the corresponding group. An injection of a precise amount of fuel is attained irrespective of any change in the engine condition.

    摘要翻译: 一种用于多缸内燃机的燃料喷射系统,其中为每个气缸提供燃料喷射器。 喷射器分为两组,每组中的气缸具有彼此间隔360度的曲柄角的操作阶段。 为每个组提供注射系统,以实现组之间的独立注射。 在每个组中,计算一个发动机循环的燃料的基本量,然后计算最终喷射量,作为基本量相对于先前喷射相应组中的实际燃料量的差值 。 无论发动机情况发生任何变化,都能实现精确量的燃料喷射。

    Method and apparatus for electronically controlling fuel injection
    10.
    发明授权
    Method and apparatus for electronically controlling fuel injection 失效
    用于电子控制燃料喷射的方法和装置

    公开(公告)号:US4389996A

    公开(公告)日:1983-06-28

    申请号:US260844

    申请日:1981-05-05

    CPC分类号: F02D31/005 F02D41/06

    摘要: A method of electronically controlling fuel injection in an engine including a bypass line running in parallel to the portion of an intake passage in which a throttle valve is provided. The communicable cross sectional area of the bypass line is controlled so as to maintain the idling speed of an engine at a predetermined desired value. When the engine temperature is higher than a predetermined value, the engine is idling and the communicable cross sectional area of the bypass line is being controlled, a value is stored related to the mean value of the flow rate of intake air or the mean amount of fuel being injected into the engine. When the engine is later being started, when the engine temperature is lower than a predetermined value, or when the engine is accelerating while the engine temperature is yet lower than a predetermined value, the amount of fuel to be injected is calculated by using the value thus stored as a parameter to compensate for internal friction in the engine.

    摘要翻译: 一种电子控制发动机中的燃料喷射的方法,该发动机包括与设置有节流阀的进气通道的部分平行地行进的旁通管路。 控制旁通管线的可通信的横截面面积,以将发动机的空转速度保持在预定的期望值。 当发动机温度高于预定值时,发动机空转并且旁路管路的可通信横截面面积被控制,与进气的流量的平均值相关联的值或者平均值 燃料被注入发动机。 当发动机以后启动时,当发动机温度低于预定值时,或发动机在发动机温度低于预定值时加速时,通过使用该值来计算要喷射的燃料量 因此被存储为参数以补偿发动机内部的摩擦。