公开(公告)号：KR1020010059308A

公开(公告)日：2001-07-06

申请号：KR1019990066700

申请日：1999-12-30

Applicant: 현대자동차주식회사

Inventor： 김혜순

IPC: F02D43/00

CPC classification number: F02D13/06 ,  F01L1/34 ,  F01L13/0015

Abstract: PURPOSE: An establishing method for valve timing of reducing emission of an engine is provided to promote atomization of fuel through rapidly increasing temperature of a combustion chamber while delaying opening time of an intake valve. CONSTITUTION: In a normal operation of an engine, air amount in valve timing is stored while deciding an input time of a cylinder cut mode according to a valve requiring the cylinder cut mode. In case of the valve as a first cycle driving cylinder, a closed timing of an intake valve is delayed while increasing fuel amount. Thus, the valve timing and fuel amount are decided for improving output of an engine for 1.7 times. Otherwise, injection of fuel is cut while delaying opening time of the intake valve and fixing an exhaust valve. In case of the valve as a second cycle driving cylinder, the valve timing and fuel amount are established for improving output of the engine for 2 times. Otherwise, fuel and ignition mode are cut while fixing the intake valve. After establishing the valve timing and the fuel amount, the cylinder cut mode is operated.

Abstract translation: 目的：提供一种减少发动机排放的气门正时的建立方法，以通过快速增加燃烧室的温度来促进燃料的雾化，同时延迟进气阀的打开时间。 构成：在发动机的正常运转中，根据需要气缸切断模式的阀决定气缸切断模式的输入时间，存储气门正时的空气量。 在作为第一循环驱动气缸的阀的情况下，在增加燃料量的同时延迟进气门的关闭正时。 因此，决定用于提高发动机输出1.7次的气门正时和燃料量。 否则，燃料喷射被切断，同时延迟进气门的打开时间并固定排气阀。 在阀作为第二循环驱动气缸的情况下，建立气门正时和燃料量，以改善发动机的输出2次。 否则，在固定进气阀时切断燃料和点火模式。 在建立气门正时和燃料量之后，气缸切断模式运转。

公开(公告)号：KR1020000066051A

公开(公告)日：2000-11-15

申请号：KR1019990012891

申请日：1999-04-13

Applicant: 현대자동차주식회사

Inventor： 최명식 ,  김혜순

IPC: F02D45/00

CPC classification number: F02D41/009 ,  F02D41/0097 ,  F02D41/1456 ,  F02D41/22 ,  F02D41/221

Abstract: PURPOSE: A discrimination method is provided to detect the fail state of respective cylinders in an MPI(multi point injection) engine employing a wide range oxygen sensor. CONSTITUTION: Suction air flux, rotational frequency of an engine, crank angular degree and the concentration of oxygen in emissions of a vehicle are detected via an air flux sensor(10), a crank angle sensor(20) and a wide range oxygen sensor(30). An ECU(electronic control unit)(40) of an engine measures the output of the oxygen sensor transmitting an electric signal corresponding to the concentration of oxygen in emissions at respective crank angular degrees detected by the crank angle sensor and calculates an ensemble average during a specific cycle. The ECU controls a fuel spray unit(50) to reduce the supply amount of fuel to a certain cylinder. By detecting the maximum and minimum values of the ensemble average for five cycles of the engine, the reduction ratio of the difference between the maximum and minimum values over 30% is decided. The reduction over 30% represents the failure of the cylinder due to a rich air-fuel ratio. If the reduction ratio is not over 30%, another cylinder has a failure due to lean air-fuel ratio.

Abstract translation: 目的：提供一种辨别方法，用于检测采用宽范围氧传感器的MPI（多点喷射）发动机中各气缸的故障状态。 构成：通过空气流量传感器（10），曲柄角传感器（20）和宽范围氧传感器（20）检测吸入空气通量，发动机转速，曲柄角度和车辆排放物中的氧浓度 30）。 发动机的ECU（电子控制单元）（40）测量氧传感器的输出，所述氧传感器传输与由曲轴转角传感器检测到的各个曲柄角度处的发射中的氧浓度相对应的电信号，并计算一个 具体循环。 ECU控制燃料喷射单元（50）以减少到某个气缸的燃料供应量。 通过检测发动机的五个循环的总体平均值的最大值和最小值，确定最大值和最小值之间差超过30％的减小比。 减少超过30％代表了由于空燃比浓的气缸故障。 如果减速比不超过30％，另一个气缸由于空燃比稀薄而失效。

公开(公告)号：KR100305784B1

公开(公告)日：2001-09-13

申请号：KR1019990012891

申请日：1999-04-13

Applicant: 현대자동차주식회사

Inventor： 최명식 ,  김혜순

IPC: F02D45/00

CPC classification number: F02D41/009 ,  F02D41/0097 ,  F02D41/1456 ,  F02D41/22 ,  F02D41/221

Abstract: MPI 엔진에서각 실린더의이상(fail) 상태를광역산소센서를이용한간단한방법에의해판별하기위하여, 자동차의엔진이정상상태인경우, 각크랭크각도에서배기가스중의산소농도를검출하는광역산소센서출력값을측정하여엔진의일정싸이클동안앙상불평균값을계산한후, 계산된앙상불평균값의극대값과극소값을검출한다. 그리고, 극대값과극소값의차이가실린더이상판별을위해설정된기준값보다커지게되면실린더이상으로판단하고, 극대값또는극소값이나타나는크랭크각도를기준으로이상실린더를판별한후, 판별된실린더의연료분사량을증감한후, 엔진의일정싸이클동안의앙상불평균값에서의극대값과극소값의차이가이전에비해설정된값 이상감소되었는지에따라실린더이상상태를판단함으로써, 산소센서피이드백 제어에의한공연비제어를통해이상발생실린더의공연비를제어할수 있으므로차량의유해배기가스를저감시킬수 있을뿐만아니라실린더연소오동작을미연에방지할수 있어차량의운행성을향상시킬수 있다.

公开(公告)号：KR100354012B1

公开(公告)日：2002-09-27

申请号：KR1019990066700

申请日：1999-12-30

Applicant: 현대자동차주식회사

Inventor： 김혜순

IPC: F02D43/00

Abstract: 본발명은전자기계식밸브엔진의에미션저감을위한밸브타이밍설정방법으로서, 실린더컷 모드에들어가기위해먼저연료를컷 시킴으로써매니폴드내의잔류연료량을감소시키고배기밸브의휴지를먼저시킴으로써실린더내에뜨거운공기가잔류하도록하여정상모드로돌아올경우연소실온도를빨리상승시킬수 있고, 흡기밸브열림시점을늦춤으로써연료무하를촉진시켜배출가스에포함된탄화수소의양을감소시킬수 있다. 본발명은차량의밸브타이밍설정방법에있어서, 실린더컷 모드에서밸브타이밍의공기량을기억하여상기실린더컷 모드의진입시점을결정하는단계; 사이클구동실린더에따라밸브타이밍및 연료량을설정하여상기실린더컷 모드로진입하는단계; 상기실린더컷 모드에서, 정상상태의모드구현을위해정상상태구현시에필요한공기량, 연료량, 점화시기및 밸브타이밍을계산하는단계; 사이클구동실린더에따라흡기밸브및 배기밸브의개폐를결정하고, 필요출력을위한공기량및 연료량을설정하여정상모드를구현하는단계를포함하여이루어진다.

公开(公告)号：KR1020010059084A

公开(公告)日：2001-07-06

申请号：KR1019990066464

申请日：1999-12-30

Applicant: 현대자동차주식회사

Inventor： 김혜순

IPC: F02D45/00

CPC classification number: F02D41/221 ,  F02D41/008 ,  F02D2200/1015

Abstract: PURPOSE: A deciding method for an abnormal state of a vehicle is provided to conveniently detect the abnormal cylinder for precisely preventing deterioration of engine output caused by misfires. CONSTITUTION: An extreme value of a cylinder operated by traveling of a vehicle is measured for being established as a first compare value. Then, oxygen amount in an exhaust system is measured. In case of an abnormal state of the cylinder, fuel amount is compensated according to the oxygen amount. By measuring an extreme value of the cylinder for an established time, an average value is established as a second compare value. In case of the difference between first and second established value over an established value, more than two cylinders are decided in the abnormal state. Otherwise, one cylinder is decided to be in the abnormal state. In case of the first compare value over the second compare value, the abnormal state is decided for the cylinder after the abnormal cylinder. Otherwise, the abnormal state is decided for the cylinder before the abnormal cylinder.

Abstract translation: 目的：提供车辆异常状态的判定方法，以方便地检测异常气缸，以精确地防止由于失火引起的发动机输出的劣化。 规定：通过车辆行驶操作的气缸的极值被测量为被确定为第一比较值。 然后，测量排气系统中的氧量。 在气缸的异常状态的情况下，根据氧气量来补偿燃料量。 通过在建立的时间内测量气缸的极值，建立平均值作为第二比较值。 在建立值之间的第一和第二建立值之间的差异的情况下，在异常状态下决定多于两个气缸。 否则，一个气缸被判定为异常状态。 在超过第二比较值的第一比较值的情况下，在异常气缸之后的气缸确定异常状态。 否则，在异常气缸前的气缸上确定异常状态。