公开(公告)号：US20140251272A1

公开(公告)日：2014-09-11

申请号：US13789502

申请日：2013-03-07

Applicant: CUMMINS INC.

Inventor： Paul V. MOONJELLY ,  Richard A. BOOTH ,  Jesus CARMONA-VALDES

IPC: F02D41/30 ,  F02M65/00

CPC classification number: F02M65/00 ,  F02D35/023 ,  F02D35/028 ,  F02D41/401 ,  F02D2041/286 ,  F02D2041/288 ,  F02D2250/14 ,  F02M65/005 ,  Y02T10/44

Abstract: This disclosure provides system and method that can determine hydraulic start of injection (SOI) in engines using an in-cylinder pressure sensor. The system and method iteratively perform a wavelet transform on a signal based on the pressure information provided by the in-cylinder pressure sensors to determine a detail coefficient corresponding to a frequency band containing frequencies of pressure pulsations excited from a fuel jet injected into the cylinder. Hydraulic SOI is determined at the timing when the amplitude of the determined detail coefficient satisfies a predetermined threshold. The system and method provide diagnostic, control, and/or compensation opportunities for fuel injector operation in high pressure fuel rail engine systems without use of expensive or complex fuel injector components.

Abstract translation: 本公开提供了可以使用缸内压力传感器确定发动机中的液压启动（SOI）的系统和方法。 系统和方法基于由缸内压力传感器提供的压力信息对信号进行迭代地执行小波变换，以确定对应于包含从喷射到气缸中的燃料喷嘴激发的压力脉动的频率的频带的细节系数。 在确定的细节系数的幅度满足预定阈值的定时确定液压SOI。 该系统和方法为高压燃料轨道发动机系统中的燃料喷射器操作提供诊断，控制和/或补偿机会，而不使用昂贵或复杂的燃料喷射器部件。