公开(公告)号：US20170159595A1

公开(公告)日：2017-06-08

申请号：US14960966

申请日：2015-12-07

Applicant: GM Global Technology Operations LLC

Inventor： Eric Russell CLARK, II ,  Wesley W. Wald ,  David E. Homyak ,  Ian J. Mac Ewen

IPC: F02D41/24 ,  F02D41/14

CPC classification number: F02D41/2467 ,  F02D41/1454 ,  F02D41/22 ,  F02D41/3005 ,  F02D2041/224 ,  F02D2200/0406 ,  F02D2200/0414 ,  F02D2200/602 ,  F02D2200/604

Abstract: A system according to the principles of the present disclosure includes a fault command module, a fuel control module, and a fault detection module. The fault command module selectively generates a command to induce a fuel system fault based on a user input. The fuel control module automatically adjusts a fuel correction factor to a target value outside of a first predetermined range in response to the command to induce a fuel system fault. The fuel control module actuates a fuel injector associated with a cylinder of an engine based on the fuel correction factor. The fault detection module detects a fuel system fault when the fuel correction factor is outside of the first predetermined range.

公开(公告)号：US20150081160A1

公开(公告)日：2015-03-19

申请号：US14099009

申请日：2013-12-06

Applicant: GM Global Technology Operations LLC

Inventor： Daniel W. Jecks ,  Steven Ward Majors ,  Ian J. Mac Ewen

IPC: G07C5/00

CPC classification number: G07C5/00 ,  F02D41/00 ,  F02D41/1454 ,  F02D41/1482 ,  F02D41/1483 ,  F02D41/1495

Abstract: A fault diagnostic system of a vehicle includes an error module, a proportional integral (PI) module, and a fault module. The error module determines an error based on a difference between a sample of a signal generated by an exhaust gas oxygen sensor and a target value of the sample. The PI module determines a proportional correction based on the error, determines an integral correction based on the error, and determines a fueling correction based on the proportional and integral corrections. The fault module selectively diagnoses a fault based on the integral correction and the fueling correction.

Abstract translation: 车辆的故障诊断系统包括错误模块，比例积分（PI）模块和故障模块。 误差模块基于由废气氧传感器产生的信号的样本与样品的目标值之间的差异来确定误差。 PI模块基于误差确定比例校正，基于误差确定积分校正，并且基于比例积分校正确定加油校正。 故障模块基于积分校正和加油校正来选择性地诊断故障。

公开(公告)号：US09234449B2

公开(公告)日：2016-01-12

申请号：US13741615

申请日：2013-01-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Ian J. Mac Ewen ,  Steven Ward Majors ,  Eric Russell Clark, II

IPC: F01N3/05 ,  F01N11/00 ,  F01N3/32 ,  F02B77/08

CPC classification number: F01N11/00 ,  F01N3/32 ,  F01N2550/14 ,  F01N2900/1804 ,  F02B77/088 ,  F02D41/021 ,  F02D41/0245 ,  F02D41/0255 ,  F02D41/22 ,  F02D2041/228 ,  Y02A50/2322 ,  Y02T10/20 ,  Y02T10/40 ,  Y02T10/47

Abstract: A diagnostic system for a vehicle is disclosed. A first difference module generates a first difference based on a first pressure measured at a first secondary air injection (SAI) valve and a previous value of the first pressure. A first summer module generates a first accumulated difference based on a sum of values of the first difference generated during a predetermined period. A second difference module generates a second difference based on a second pressure measured at a second SAI valve and a previous value of the second pressure. A second summer module generates a second accumulated difference based on a sum of values of the second difference generated during the predetermined period. A fault indication module selectively indicates that a fault is present downstream of one of the first and second SAI valves based on the first and second accumulated differences.

Abstract translation: 公开了一种用于车辆的诊断系统。 第一差分模块基于在第一二次空气喷射（SAI）阀处测量的第一压力和第一压力的先前值来产生第一差值。 第一夏季模块基于在预定时间段期间产生的第一差值的总和产生第一累积差。 第二差模块基于在第二SAI阀处测量的第二压力和第二压力的先前值产生第二差。 第二夏季模块基于在预定时段期间产生的第二差异的值的总和产生第二累积差。 故障指示模块基于第一和第二累积差异选择性地指示故障存在于第一和第二SAI阀之一的下游。