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    Method of determining the composition of fuel in a flexible fueled vehicle after fuel blending
    2.
    发明授权
    Method of determining the composition of fuel in a flexible fueled vehicle after fuel blending 有权
    燃料混合后在柔性燃料车辆中确定燃料组成的方法

    公开(公告)号：US06257174B1

    公开(公告)日：2001-07-10

    申请号：US09251497

    申请日：1999-02-17

    申请人： Shean Huff ,  Yi Cheng ,  Robert J. Nankee, II ,  Mary Joyce ,  Jerry Kennie ,  Roland T. Richardson ,  Gary L. Seitz

    发明人： Shean Huff ,  Yi Cheng ,  Robert J. Nankee, II ,  Mary Joyce ,  Jerry Kennie ,  Roland T. Richardson ,  Gary L. Seitz

    IPC分类号： F02B7512

    CPC分类号： F02D19/084 ,  F02D19/088 ,  Y02T10/36

    摘要： The present invention provides a flexible fuel compensation system for determining the percent alcohol content of fuel in a flexible fueled vehicle at the instance of fueling and in an open loop operating mode. According to the invention, two estimated percent alcohol content values are calculated based on the old fuel mixture's alcohol content and two fueling possibilities. A first value is calculated for the possibility that E85 fuel was added to the tank and a second value is calculated for the possibility that E0 fuel was added to the tank. If the inferred ethanol content increases above a positive threshold during closed loop operation, the system assumes that E85 fuel has been added to the tank. Conversely, if the inferred ethanol content decreases below a negative threshold, the system assumes that E0 fuel was added to the tank. Accordingly, if the vehicle is shut down before a more accurate ethanol content determination is complete, the inferred ethanol content follows either the first or second estimated alcohol content value until the system reaches a closed loop operating condition.

    摘要翻译： 本发明提供一种灵活的燃料补偿系统，用于在燃料加注和开环操作模式的情况下确定柔性燃料车辆中的燃料百分比。 根据本发明，基于旧燃料混合物的酒精含量和两种加油可能性来计算两个估计的醇含量百分比值。 对于将E85燃料添加到罐中的可能性计算第一个值，并计算第二个值，以便将E0燃料添加到罐中。 如果推断的乙醇含量在闭环操作期间增加到高于正阈值，则系统假定已将E85燃料添加到罐中。 相反，如果推断的乙醇含量降低到负阈值以下，则系统假设将E0燃料加入到罐中。 因此，如果车辆在更准确的乙醇含量测定完成之前被关闭，则所推断的乙醇含量遵循第一或第二估计的醇含量值，直到系统达到闭环操作状态。

    Method of determining the composition of fuel in a flexible fueled vehicle after fuel blending
    3.
    发明授权
    Method of determining the composition of fuel in a flexible fueled vehicle after fuel blending 失效
    燃料混合后在柔性燃料车辆中确定燃料组成的方法

    公开(公告)号：US5901671A

    公开(公告)日：1999-05-11

    申请号：US959820

    申请日：1997-10-29

    申请人： Shean Huff ,  Yi Cheng ,  Robert J. Nankee, II ,  Mary Joyce ,  Jerry Kennie ,  Roland T. Richardson ,  Gary L. Seitz

    发明人： Shean Huff ,  Yi Cheng ,  Robert J. Nankee, II ,  Mary Joyce ,  Jerry Kennie ,  Roland T. Richardson ,  Gary L. Seitz

    IPC分类号： F02D19/08 ,  F02B75/12

    CPC分类号： F02D19/084 ,  F02D19/088 ,  Y02T10/36

    摘要： The present invention provides a flexible fuel compensation system for determining the percent alcohol content of fuel in a flexible fueled vehicle at the instance of fueling and in an open loop operating mode. According to the invention, two estimated percent alcohol content values are calculated based on the old fuel mixture's alcohol content and two fueling possibilities. A first value is calculated for the possibility that E85 fuel was added to the tank and a second value is calculated for the possibility that E0 fuel was added to the tank. If the inferred ethanol content increases above a positive threshold during closed loop operation, the system assumes that E85 fuel has been added to the tank. Conversely, if the inferred ethanol content decreases below a negative threshold, the system assumes that E0 fuel was added to the tank. Accordingly, if the vehicle is shut down before a more accurate ethanol content determination is complete, the inferred ethanol content follows either the first or second estimated alcohol content value until the system reaches a closed loop operating condition.

    摘要翻译： 本发明提供一种灵活的燃料补偿系统，用于在燃料加注和开环操作模式的情况下确定柔性燃料车辆中的燃料百分比。 根据本发明，基于旧燃料混合物的酒精含量和两种加油可能性来计算两个估计的醇含量百分比值。 对于将E85燃料添加到罐中的可能性计算第一个值，并计算第二个值，以便将E0燃料添加到罐中。 如果推断的乙醇含量在闭环操作期间增加到高于正阈值，则系统假定已将E85燃料添加到罐中。 相反，如果推断的乙醇含量降低到负阈值以下，则系统假设将E0燃料加入到罐中。 因此，如果车辆在更准确的乙醇含量测定完成之前被关闭，则所推断的乙醇含量遵循第一或第二估计的醇含量值，直到系统达到闭环操作状态。

    Method of determining the composition of fuel in a flexible fueled vehicle
    4.
    发明授权
    Method of determining the composition of fuel in a flexible fueled vehicle 失效
    确定柔性燃料车辆燃料组成的方法

    公开(公告)号：US5881703A

    公开(公告)日：1999-03-16

    申请号：US958411

    申请日：1997-10-29

    申请人： Robert J. Nankee, II ,  Yi Cheng ,  Shean Huff ,  Mary Joyce ,  Jerry Kennie ,  Dennis A. Krozek ,  Richard K. Moote ,  Roland T. Richardson ,  Gary L. Seitz

    发明人： Robert J. Nankee, II ,  Yi Cheng ,  Shean Huff ,  Mary Joyce ,  Jerry Kennie ,  Dennis A. Krozek ,  Richard K. Moote ,  Roland T. Richardson ,  Gary L. Seitz

    IPC分类号： F02D19/08 ,  F02D41/00 ,  F02D41/16

    CPC分类号： F02D41/0025 ,  F02D19/0623 ,  F02D19/084 ,  F02D19/088 ,  F02D2200/0612 ,  Y02T10/36

    摘要： The present invention provides a flexible fuel compensation system for controlling operating parameters of an internal combustion engine based on a learned value of the percent alcohol content of the fuel using an oxygen feedback system. The methodology determines a fuel composition multiplier based on the percent alcohol content and implements gasoline operating parameters for the internal combustion engine if the fuel composition multiplier is less than a first threshold value, mixed gasoline/alcohol operating parameters if the fuel composition multiplier is greater than the first threshold value, and high concentration alcohol operating parameters if the fuel composition multiplier is greater than a second threshold value for a number of comparison checks. After a predetermined period, the fuel composition multiplier is updated and re-compared to the first and second thresholds and the appropriate one of the aforementioned operating parameters is implemented. A third update of the fuel composition multiplier is made if the determined fuel composition multiplier is less than the actual percent alcohol content of the fuel by more than a given amount.

    摘要翻译： 本发明提供了一种灵活的燃料补偿系统，用于基于使用氧气反馈系统的燃料的百分比醇含量的学习值来控制内燃机的操作参数。 该方法确定基于酒精含量百分比的燃料组成乘数，并且如果燃料组成乘数小于第一阈值，则实施内燃机的汽油操作参数，如果燃料组成乘数大于混合汽油/酒精运行参数 第一阈值和高浓度酒精操作参数，如果燃料组成乘数大于用于多个比较检查的第二阈值。 在预定时间段之后，更新燃料成分乘数并重新比较第一和第二阈值，并且实现上述操作参数中的适当的一个。 如果确定的燃料组成乘数小于燃料的实际酒精含量超过给定量，则进行燃料组成乘数的第三更新。

    Method of determining ethanol thresholds in a flexible fueled vehicle
    9.
    发明授权
    Method of determining ethanol thresholds in a flexible fueled vehicle 失效
    在柔性燃料车辆中测定乙醇阈值的方法

    公开(公告)号：US5868117A

    公开(公告)日：1999-02-09

    申请号：US959815

    申请日：1997-10-29

    申请人： Richard K. Moote ,  Shean Huff ,  Mary Joyce ,  Howard W. Krausman ,  Gary L. Seitz

    发明人： Richard K. Moote ,  Shean Huff ,  Mary Joyce ,  Howard W. Krausman ,  Gary L. Seitz

    IPC分类号： F02D19/08 ,  F02D41/00 ,  F02D41/24 ,  F02D41/26

    CPC分类号： F02D19/088 ,  F02D19/0623 ,  F02D19/084 ,  F02D41/0025 ,  F02D41/2451 ,  F02D2200/0612 ,  Y02T10/36

    摘要： The present invention provides a method for determining ethanol thresholds for a flexible fuel control system for a motor vehicle capable of operating on more than one type of fuel. Preferably, the ethanol threshold is determined from an off-idle purge-free cell from a matrix of fuel adaptive memory cells normally used to compensate for car-to-car variations in required fueling. The ethanol threshold is periodically reduced to compensate for levels of alcohol creep indicated by the amount of purge-free adaptive memory elevation. If the learned value of percent alcohol content of the fuel is less than the ethanol threshold, gasoline operating parameters are implemented for the internal combustion engine. The off-idle purge-free cell also provides a basis for interpolating an on-board diagnostic (OBDII) ethanol threshold. As such, the OBDII monitors are only enabled if the learned value of percent alcohol content of the fuel is less than the OBDII ethanol threshold.

    摘要翻译： 本发明提供了一种用于确定能够在多于一种类型的燃料上操作的用于机动车辆的柔性燃料控制系统的乙醇阈值的方法。 优选地，乙醇阈值是从通常用于补偿所需燃料供应中的车对车变化的燃料自适应存储器单元的矩阵的脱离空闲无吹扫电池确定的。 定期降低乙醇阈值以补偿由无清除自适应记忆升高量指示的酒精蠕变水平。 如果燃料酒精含量百分比的学习值小于乙醇阈值，则对内燃机实施汽油运行参数。 脱机无吹扫单元还为内插车载诊断（OBDII）乙醇阈值提供了基础。 因此，仅当燃料的酒精含量百分比值低于OBDII乙醇阈值时，OBDII监视器才能启用。