Method and apparatus for controlling ignition timing in a compression-ignition engine operating in an auto-ignition mode
    5.
    发明申请
    Method and apparatus for controlling ignition timing in a compression-ignition engine operating in an auto-ignition mode 有权
    用于控制在自动点火模式下操作的压燃式发动机中的点火正时的方法和装置

    公开(公告)号:US20080302329A1

    公开(公告)日:2008-12-11

    申请号:US11758025

    申请日:2007-06-05

    IPC分类号: F02B23/00

    摘要: A method for controlling timing of ignition of a fuel charge in a compression-ignition engine operating in a controlled auto-ignition mode wherein the engine includes controllable intake and exhaust valve actuation systems is described. The method comprises determining a preferred ignition timing for a cylinder charge and a mass of the fuel charge based upon operator torque request. A portion of the fuel charge is partially oxidized during a negative valve overlap period immediately prior to a compression stroke. Magnitude of the portion of the fuel charge is based upon the preferred ignition timing of the cylinder charge. A remainder of the fuel charge is injected into the cylinder during the compression stroke.

    摘要翻译: 一种用于控制在可控自动点火模式下操作的压燃式发动机中的燃料充注时间的方法,其中发动机包括可控制的进气和排气阀驱动系统。 该方法包括基于操作者扭矩请求确定气缸充气的优选点火正时和燃料充量的质量。 燃料电荷的一部分在压缩冲程之前的负阀重叠期间被部分氧化。 燃料充电部分的大小基于气缸充电的优选点火正时。 在压缩冲程期间,剩余的燃料装料被注入到气缸中。

    Method and apparatus for controlling ignition timing in a compression-ignition engine operating in an auto-ignition mode
    6.
    发明授权
    Method and apparatus for controlling ignition timing in a compression-ignition engine operating in an auto-ignition mode 有权
    用于控制在自动点火模式下操作的压燃式发动机中的点火正时的方法和装置

    公开(公告)号:US07703434B2

    公开(公告)日:2010-04-27

    申请号:US11758025

    申请日:2007-06-05

    IPC分类号: F02B23/00

    摘要: A method for controlling timing of ignition of a fuel charge in a compression-ignition engine operating in a controlled auto-ignition mode wherein the engine includes controllable intake and exhaust valve actuation systems is described. The method comprises determining a preferred ignition timing for a cylinder charge and a mass of the fuel charge based upon operator torque request. A portion of the fuel charge is partially oxidized during a negative valve overlap period immediately prior to a compression stroke. Magnitude of the portion of the fuel charge is based upon the preferred ignition timing of the cylinder charge. A remainder of the fuel charge is injected into the cylinder during the compression stroke.

    摘要翻译: 一种用于控制在可控自动点火模式下操作的压燃式发动机中的燃料充注时间的方法,其中发动机包括可控制的进气和排气阀驱动系统。 该方法包括基于操作者扭矩请求确定气缸充气的优选点火正时和燃料充量的质量。 燃料电荷的一部分在压缩冲程之前的负阀重叠期间被部分氧化。 燃料充电部分的大小基于气缸充电的优选点火正时。 在压缩冲程期间,剩余的燃料装料被注入到气缸中。

    Method and apparatus for cold starting a spark ignited internal
combustion engine fueled with an alcohol-based fuel mixture
    7.
    发明授权
    Method and apparatus for cold starting a spark ignited internal combustion engine fueled with an alcohol-based fuel mixture 失效
    一种用酒精基燃料混合物燃烧的火花点火内燃机的冷启动方法和装置

    公开(公告)号:US5146882A

    公开(公告)日:1992-09-15

    申请号:US750357

    申请日:1991-08-27

    IPC分类号: F02D41/06 F02P3/02 F02P15/12

    CPC分类号: F02P3/02 F02D41/062 F02P15/12

    摘要: A method and apparatus for enhancing the cold starting performance of a spark ignition, internal combustion engine fueled with an alcohol-based fuel mixture is described. The quantity of fuel mixture delivered to the engine is regulated to establish a combustible fuel vapor-air mixture in each engine cylinder during cranking, while restricting the accumulation of unvaporized fuel in the each cylinder so as not to exceed a predetermined amount. In addition, each cylinder spark plug is provided with an ignition current having a peak magnitude sufficient to achieve voltage break down across each spark plug arc gap, when each gap is resistively loaded due to wetting in accordance with the predetermined amount of accumulated unvaporized fuel. Preferably, the quantity of fuel delivered to the engine during cranking is reduced at a substantially exponential rate as a function of the cumulative number of revolutions the engine is rotated during cranking. An ignition coil having a secondary to primary winding turns ratio in the order of 65:1, with its secondary winding wrapped onto a plurality of partitions in a segmented dielectric bobbin, is employed to provide the required ignition current for firing the engine spark plugs when the predetermined amount of unvaporized fuel accumulates in the engine cylinders.

    摘要翻译: 描述了一种用于增强用酒精基燃料混合物燃烧的火花点火的内燃机的冷启动性能的方法和装置。 调节输送到发动机的燃料混合物的量,以在起动期间在每个发动机气缸中建立可燃燃料蒸汽 - 空气混合物,同时限制每个气缸中的未蒸发燃料的积聚,从而不超过预定量。 此外,当每个气缸火花塞具有足够的峰值的点火电流,其足以在每个间隙由于根据预定量的积聚的未蒸发燃料的润湿而被电阻加载时实现每个火花塞电弧间隙的电压分解。 优选地,在起动期间输送到发动机的燃料量以作为起动期间发动机旋转的累积转数的函数以基本上指数的速率减小。 一个点火线圈,其二次绕组匝数比约为65:1,其二次绕组缠绕在分段介电绕线管中的多个隔板上,用于提供所需的点火电流,用于点火发动机火花塞 预定量的未蒸发燃料积存在发动机气缸中。