Fuel injection measurement and diagnostics
    9.
    发明授权
    Fuel injection measurement and diagnostics 有权
    燃油喷射测量和诊断

    公开(公告)号:US07904233B2

    公开(公告)日:2011-03-08

    申请号:US12190804

    申请日:2008-08-13

    IPC分类号: G06F17/00

    摘要: A system and method comprises operating an engine during a first cycle to drive a piston in a cylinder without energizing a fuel injector of the cylinder; acquiring first pressure data of the cylinder for a predetermined crank angle window during the first cycle; energizing the fuel injector for an energizing time during a second cycle; acquiring second pressure data of the cylinder for the predetermined crank angle window during the second cycle; calculating a pressure ratio difference average (PRDA) from the first pressure data and the second pressure data; and modifying the operation of the fuel injector based on the PRDA value.

    摘要翻译: 一种系统和方法包括在第一循环期间操作发动机以在气缸中驱动活塞而不使气缸的燃料喷射器通电; 在第一周期期间获取用于预定曲柄角窗口的气缸的第一压力数据; 在第二循环期间给燃料喷射器通电一个通电时间; 在所述第二循环期间获取用于所述预定曲柄角窗口的所述气缸的第二压力数据; 从所述第一压力数据和所述第二压力数据计算压力差平均值(PRDA); 以及基于PRDA值修改燃料喷射器的操作。

    FUEL SYSTEM DIAGNOSTICS BY ANALYZING CYLINDER PRESSURE SIGNAL
    10.
    发明申请
    FUEL SYSTEM DIAGNOSTICS BY ANALYZING CYLINDER PRESSURE SIGNAL 有权
    通过分析气缸压力信号的燃油系统诊断

    公开(公告)号:US20100280701A1

    公开(公告)日:2010-11-04

    申请号:US12835794

    申请日:2010-07-14

    IPC分类号: G01M17/00

    摘要: A method for diagnosing combustion within a direct-injection, internal combustion engine including a plurality of combustion chambers and operative lean of stoichiometry includes monitoring pressure readings in the plurality of combustion chambers across engine crank angles, estimating a mass fraction burn percentage for each pressure reading, determining respective crank angles corresponding to a predetermined mass burn percentage for each combustion chamber, comparing said determined crank angles for sequential ones of the plurality of combustion chambers, and indicating an abnormal combustion event if compared crank angles differ by a predetermined angle.

    摘要翻译: 一种用于诊断直喷式内燃机的燃烧方法,该内燃机包括多个燃烧室,其操作性较低的化学计量学包括监测多个燃烧室中跨越发动机曲柄角的压力读数,估计每个压力读数的质量分数燃烧百分比 确定对应于每个燃烧室的预定质量燃烧百分比的相应曲柄角,比较所述确定的多个燃烧室中的顺序燃烧室的曲柄角,并且如果曲轴角度相差预定角度则指示异常燃烧事件。