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90 条记录 (耗时 0.022 秒)

    Method and system to avoid piston-valve collision
    86.
    发明授权
    Method and system to avoid piston-valve collision 有权
    避免活塞阀碰撞的方法和系统

    公开(公告)号：US07178493B2

    公开(公告)日：2007-02-20

    申请号：US11177832

    申请日：2005-07-08

    申请人： Jun-Mo Kang ,  Chen-Fang Chang

    发明人： Jun-Mo Kang ,  Chen-Fang Chang

    IPC分类号： F01L1/34

    CPC分类号： F02D13/0253 ,  F01L1/16 ,  F01L1/34 ,  F01L9/02 ,  F01L9/04 ,  F01L2800/00 ,  F01L2800/16 ,  F01L2820/02 ,  Y02T10/18

    摘要： A method and system to avoid collision of piston and engine valves is provided. This facilitates use of a fully flexible variable valve actuation system over its operating range, without arbitrary constraints. Included is actuation control of the engine valve, determination of a crank angle at which to initiate engine valve opening, and determination of a desired valve lift, and, duration of valve open time. Opening profile for the engine valve is estimated. A first and a second crank angle are calculated, based upon the estimated opening profile. The crank angle to initiate engine valve opening is determined by adding a safety margin to the second crank angle. The method determines a maximum valve lift, given the duration of valve open time and an engine valve opening crank angle, and a minimum duration of valve open time, given a valve lift and an engine valve opening crank angle.

    摘要翻译： 提供了一种避免活塞和发动机气门碰撞的方法和系统。 这有助于在其工作范围内使用完全灵活的可变气门驱动系统，而无需任何约束。 包括发动机气门的致动控制，确定启动发动机气门打开时的曲轴角度，确定期望的气门升程以及阀打开时间的持续时间。 估计发动机气门的开启轮廓。 基于估计的开口轮廓来计算第一和第二曲柄角。 启动发动机气门打开的曲柄角是通过向第二曲柄角增加安全余量来确定的。 给定阀提升和发动机气门打开曲柄角，该方法确定给定阀打开时间的持续时间和发动机气门打开曲柄角以及阀打开时间的最小持续时间。

    METHOD AND SYSTEM TO AVOID PISTON-VALVE COLLISION
    87.
    发明申请
    METHOD AND SYSTEM TO AVOID PISTON-VALVE COLLISION 有权
    避免活塞阀碰撞的方法和系统

    公开(公告)号：US20070006832A1

    公开(公告)日：2007-01-11

    申请号：US11177832

    申请日：2005-07-08

    申请人： Jun-Mo Kang ,  Chen-Fang Chang

    发明人： Jun-Mo Kang ,  Chen-Fang Chang

    IPC分类号： F01L1/34

    CPC分类号： F02D13/0253 ,  F01L1/16 ,  F01L1/34 ,  F01L9/02 ,  F01L9/04 ,  F01L2800/00 ,  F01L2800/16 ,  F01L2820/02 ,  Y02T10/18

    摘要： A method and system to avoid collision of piston and engine valves is provided. This facilitates use of a fully flexible variable valve actuation system over its operating range, without arbitrary constraints. Included is actuation control of the engine valve, determination of a crank angle at which to initiate engine valve opening, and determination of a desired valve lift, and, duration of valve open time. Opening profile for the engine valve is estimated. A first and a second crank angle are calculated, based upon the estimated opening profile. The crank angle to initiate engine valve opening is determined by adding a safety margin to the second crank angle. The method determines a maximum valve lift, given the duration of valve open time and an engine valve opening crank angle, and a minimum duration of valve open time, given a valve lift and an engine valve opening crank angle.

    摘要翻译： 提供了一种避免活塞和发动机气门碰撞的方法和系统。 这有助于在其工作范围内使用完全灵活的可变气门驱动系统，而无需任何约束。 包括发动机气门的致动控制，确定启动发动机气门打开时的曲轴角度，确定期望的气门升程以及阀打开时间的持续时间。 估计发动机气门的开启轮廓。 基于估计的开口轮廓来计算第一和第二曲柄角。 启动发动机气门打开的曲柄角是通过向第二曲柄角增加安全余量来确定的。 给定阀提升和发动机气门打开曲柄角，该方法确定给定阀打开时间的持续时间和发动机气门打开曲柄角以及阀打开时间的最小持续时间。

    Engine fuel injection control method with fuel puddle modeling
    89.
    发明授权
    Engine fuel injection control method with fuel puddle modeling 有权
    发动机燃油喷射控制方法与燃料水坑建模

    公开(公告)号：US06176222B1

    公开(公告)日：2001-01-23

    申请号：US09437072

    申请日：1999-11-09

    申请人： John E. Kirwan ,  Scott Willis Jorgensen ,  Frederic Anton Matekunas ,  Chen-Fang Chang

    发明人： John E. Kirwan ,  Scott Willis Jorgensen ,  Frederic Anton Matekunas ,  Chen-Fang Chang

    IPC分类号： F02M5100

    CPC分类号： F02D35/023 ,  F02D41/047 ,  F02D41/187 ,  F02D2200/0402 ,  F02D2200/0406 ,  F02D2200/0414 ,  F02D2200/0602 ,  F02D2200/0612 ,  F02D2200/0614 ,  F02D2200/703 ,  F02M26/13

    摘要： An improved engine fuel control method which divides the liquid fuel into a plurality of components characterized by relative volatility. The mass and evaporation characteristics of each fuel volatility component are determined separately within the fuel puddle, with the overall puddle behavior being characterized as the sum of the behaviors of the individual volatility components. The method involves determining, for each engine cycle, the mass of fuel that will evaporate from the puddle, the mass of vapor required to achieve the desired air/fuel ratio for the engine cylinder, the fraction of the injected fuel that will vaporize, and the mass of fuel that needs to be injected in order to achieve the desired air/fuel ratio in the cylinder. Finally, the puddle mass is updated for the next intake event. In a preferred implementation, the liquid fuel is divided into first, second and third components respectively characterized by high, medium and low volatility, and the volatility is inferred based on a measure of the fired-to-motored cylinder pressure ratio.

    摘要翻译： 一种改进的发动机燃料控制方法，其将液体燃料分成由相对挥发性表征的多个组分。 每个燃料挥发性组分的质量和蒸发特性在燃料水池内单独确定，其中整体水泥行为被表征为各个挥发性组分的行为之和。 该方法包括为每个发动机循环确定将从熔池蒸发的燃料质量，实现发动机气缸所需空气/燃料比所需的蒸汽质量，将蒸发的喷射燃料的分数，以及 需要喷射的燃料的质量以便实现气缸中所需的空气/燃料比。 最后，水坑质量被更新为下一次摄入事件。 在优选的实施方案中，液体燃料被分为以高，中和低挥发性为特征的第一，第二和第三成分，并且基于对燃烧到电动汽缸压力比的测量推断出挥发性。

    Engine control having fuel volatility compensation
    90.
    发明授权
    Engine control having fuel volatility compensation 有权
    发动机控制具有燃料挥发性补偿

    公开(公告)号：US06178949B2

    公开(公告)日：2001-01-30

    申请号：US09411273

    申请日：1999-10-04

    申请人： John E. Kirwan ,  Frederic Anton Matekunas ,  Scott Willis Jorgensen ,  Chen-Fang Chang

    发明人： John E. Kirwan ,  Frederic Anton Matekunas ,  Scott Willis Jorgensen ,  Chen-Fang Chang

    IPC分类号： F02M700

    CPC分类号： F02D35/023 ,  F02D19/061 ,  F02D19/0636 ,  F02D19/0649 ,  F02D41/0025 ,  F02D2200/0612 ,  Y02T10/36

    摘要： An improved engine control in which the fuel volatility is detected based on a measure of the fired-to-motored cylinder pressure ratio, and used to trim fuel and spark timing controls during engine warm-up and transient fueling periods. In a first embodiment, a matrix of empirically determined pressure ratio values that occur with fuels of differing volatility is stored and compared to the measured pressure ratio to identify the closest stored pressure ratio, and the fuel volatility is determined based on the fuel volatility associated with the identified pressure ratio. In a second embodiment, the actual fuel vapor-to-air equivalence ratio is computed based on the measured pressure ratio, and the fuel volatility is determined based on the deviation between the actual ratio and the desired fuel vapor-to-air equivalence ratio.

    摘要翻译： 一种改进的发动机控制，其中基于燃起的电动汽缸压力比的测量来检测燃料挥发性，并且用于在发动机预热和瞬时加燃料期间对燃料和火花正时控制进行调节。 在第一实施例中，存储与挥发性不同的燃料一起出现的经验确定的压力比值矩阵，并将其与所测量的压力比进行比较，以确定最接近的储存压力比，并且基于与 确定的压力比。 在第二实施例中，基于测量的压力比计算实际的燃料蒸汽对空气当量比，并且基于实际比率和期望的燃料蒸气对空气当量比之间的偏差来确定燃料挥发性。