KR100215664B1 - Misfire detecting system of internal combustion engine - Google Patents

Misfire detecting system of internal combustion engine Download PDF

Info

Publication number
KR100215664B1
KR100215664B1 KR1019940029198A KR19940029198A KR100215664B1 KR 100215664 B1 KR100215664 B1 KR 100215664B1 KR 1019940029198 A KR1019940029198 A KR 1019940029198A KR 19940029198 A KR19940029198 A KR 19940029198A KR 100215664 B1 KR100215664 B1 KR 100215664B1
Authority
KR
South Korea
Prior art keywords
state
time
normal
combustion
specific
Prior art date
Application number
KR1019940029198A
Other languages
Korean (ko)
Other versions
KR960018184A (en
Inventor
홍재희
Original Assignee
류정열
기아자동차주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 류정열, 기아자동차주식회사 filed Critical 류정열
Priority to KR1019940029198A priority Critical patent/KR100215664B1/en
Publication of KR960018184A publication Critical patent/KR960018184A/en
Application granted granted Critical
Publication of KR100215664B1 publication Critical patent/KR100215664B1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00—Testing of engines
    • G01M15/04—Testing internal-combustion engines
    • G01M15/11—Testing internal-combustion engines by detecting misfire
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1015—Engines misfires

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

본 발명은 연소가 안정되지 않은 특정상태로 부터 실화상태를 검출하는 시스템에 관한 것으로, 이는 연료의 과도한 분사나 각종센서의 이상 또는 악셀레이터의 이상시동등에 의해 연소가 안정되지 않은 특정상태의 유무판단에 따라 특정상태에 있을 경우 특정상태 최초시간(t1), 특정상태 경과후의 시간(t2) 및 연소사이클(ncyl)타임을 리셋팅한 후 실화판정을 무효로 하고, 특정상태에 있지 않을 경우 특정상태 최초시간(t1)과 연소사이클(ncyl)타임이 정상일 경우를 0으로 설정하고 있어, t1ncyl=0이면 정상상태임을 나타내므로 이와 같이 정상상태이면 전기통이 정상 연소상태인지를 판단하여 정상이며 특정상태 경과후의 시간(t2) 및 연소사이클(ncyl)타임이 정상, 즉 t2, ncly=0상태일 경우 실화판정을 실행시키도록 하여 특정상태가 경과된 후의 엔진의 안정영역이 확실하게 판정되고 실화판정의 정도를 향상시킬수 있도록 한 것이다.The present invention relates to a system for detecting a misfire state from a specific state in which combustion is not stable. This is to determine whether a combustion is not stable in a specific state due to excessive injection of fuel, abnormality of various sensors, or abnormal starting of an accelerator. Therefore, if it is in a specific state, the misfire determination is invalid after resetting the initial state of the specific state (t 1 ), the time after elapse of the specific state (t 2 ) and the combustion cycle (ncyl) time. If the initial state of the state (t 1 ) and the combustion cycle (ncyl) time is normal, it is set to 0. If t 1 ncyl = 0, it indicates that it is a normal state. by normal and to execute the misfire determination if the specific condition has passed after the time (t 2) and the combustion cycle (ncyl) time is normal, i.e., t 2, ncly = 0 state of the engine after the lapse of a specific condition The stable area can be determined reliably and the degree of misfire determination can be improved.

Description

자동차엔진의 실화검출시스템True engine detection system of automobile engine

제 1 도는, 본 발명을 실행하는 일 예시적 플로우차트.1 is an exemplary flowchart for practicing the present invention.

본 발명은 연소가 안정되지 않은 특정상태로 부터 실화상태를 검출하는 시스템에 관한 것으로, 특히 연료의 과도한 분사나 각종센서의 이상 또는 악셀레이터의 이상시동등에 의해 연소가 안정되지 않은 특정상태의 유무판단에 따라 주행중 연료의 이상압력이나 점화장치등의 이상으로 인해 순간적으로 연료가 공급되지 않는 실화상태여부를 검출하기 위해 특정상태에 있지 않을 경우 특정상태 최초시간과 특정상태경과후의 시간에서 연소사이클타임이 정상인가의 여부를 판단하여 이에 따라 실화판정의 유무가 결정되게 함으로써 실화판정의 정도가 향상되게 한 자동차엔진의 실화검출시스템에 관한 것이다.The present invention relates to a system for detecting a misfire state from a specific state in which the combustion is not stable. In particular, the present invention relates to the determination of the presence or absence of a certain state in which the combustion is not stable due to excessive injection of fuel, abnormality of various sensors, or abnormal start of the accelerator. Therefore, the combustion cycle time is normal at the initial time of the specific state and at the time after the specific state has elapsed if it is not in a specific state to detect whether the fuel is not supplied momentarily due to abnormal pressure of the fuel or an ignition device while driving. The present invention relates to a misfire detection system for an automobile engine, in which the degree of misfire determination is improved by determining whether or not an authorization is made and thereby determining the presence or absence of misfire determination.

일반적으로 자동차엔진의 실화검출방식은 가솔린잔량이 저하되면 실화판정을 하도록 구성되어 있는데, 이와 같이 단순히 가솔린잔량이 저하된 것만으로 실화판정을 내림으로써 남아 있는 소정의 가솔린잔량을 이용하여 실화율을 보상하여 가능한 범위까지의 주행이 가능한가의 여부가 판단되지 않은 상태에서 그대로 실화판정을 실행시키거나 연료의 과도한 분사나 각종센서의 이상 또는 악셀레이터의 이상시동등에 의해 연소가 안정되지 않은 특정상태에 있을 경우 소정의 시간동안 실화판정을 무효화시키는 방식이 있었느나, 이 역시 실화판정의 정도가 저하되는 등의 제문제가 있어 왔다.In general, the misfire detection method of an automobile engine is configured to make a misfire determination when the gasoline residual amount is lowered. Thus, the misfire rate is compensated by using the remaining gasoline residual amount by simply making a misfire determination by simply declining the gasoline residual amount. If it is in a specific state in which combustion is not stable due to misfire determination, excessive injection of fuel, abnormality of various sensors, or abnormal start of accelerator, etc. Although there have been methods of invalidating misfire judgments during the time period, there have also been problems such as a decrease in the degree of misfire judgment.

따라서 본 발명은 전술한 바와같은 제반문제를 해소하기 위한 것으로, 연소가 안정되지 않은 특정상태인가의 여부판단에 따라 특정상태일 경우 실화판정이 무효로 되며, 특정상태에 있지 않을경우 특정상태 최초시간과 연소사이클타임이 정상일경우를 0으로 설정한 설정치와 비교하여 정상상태(0)일 경우 전기통이 정상적인 연소상태인지를 판단하고 정상 연소상태이면 특정시간경과후의 시간과 연소사이클이 정상상태(0)인지를 판단하여 정상상태이면 비로서 실화판정이 실행되게 한 자동차엔진의 실화검출시스템을 제공함에 그목적이 있는 것이다.Therefore, the present invention is intended to solve the above-mentioned problems, the misfire determination is invalid in a specific state according to the determination of whether the combustion is a specific state that is not stable, the initial time of the specific state if not in a specific state When the combustion cycle time is normal and compared with the set value set to 0, it is determined whether the electric cylinder is in a normal combustion state in the normal state (0), and in the normal combustion state, the time after a specific time elapses and the combustion cycle is in the normal state (0). The purpose is to provide a misfire detection system for an automobile engine that allows misfire determination to be executed when the normal state is determined.

본 발명은 연소가 안정되지 않은 특정상태인지의 여부를 판단하고, 특정상태에 있을 경우 특정상태 최초시간, 특정상태 경과후의 시간 및 연소사이클타임을 리셋팅한 후 실화판정을 무효로 하고, 특정상태에 있지 않을 경우 최소시간과 연소사이클타임이 정상인지를 판단하여 정상일 경우 전기통이 정상 연소상태인지를 파악하고, 정상 연소상태이면 특정 시간경과후의 시간과 연소사이클타임이 정상인지를 판단하여 정상일 경우 실화판정이 실행하게 한 것이다.The present invention determines whether or not combustion is in a particular state that is not stable, and if it is in a particular state, resets the initial time of the specific state, the time after the specific state has elapsed, and the combustion cycle time, thereby invalidating the misfire determination, and in the specific state. If not, determine whether the minimum time and combustion cycle time are normal. If normal, determine whether the electric cylinder is in normal combustion state. If normal combustion, determine whether the time after the specific time and combustion cycle time are normal. The true judgment was made to execute.

이하 본 발명의 실시예를 첨부도면에 의거 보다 상세히 설명하면 다음과 같다.Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

본 발명의 자동차의 실화검출시스템은 제 1 도에 도시한 바와같이 연료의 과도한 분사나 각종센서의 이상 또는 악셀레이터의 이상시동등에 의해 연소가 안정되지 않은 특정상태의 유무판단에 따라 특정상태에 있을 경우 특정상태 최초시간(t1), 특정상태 경과후의 시간(t2) 및 연소사이클(ncyl)타임을 리셋팅한 후 실화판정을 무효로 하고, 특정상태에 있지 않을 경우 특정상태 최초시간(t1)과 연소사이클(ncyl)타임이 정상일 경우를 0으로 설정하고 있어 t1, ncyl=0이면 정상상태임을 나타내므로 이와 같이 정상상태이면 전기통이 정상 연소상태인지를 판단하여 정상이면 특정상태 경과후의 시간(t2) 및 연소사이클(ncyl)타임이 정상, 즉 t2, ncyl=0상태일 경우 실화판정을 실행하게 되는 것이다.As shown in FIG. 1, the misfire detection system of a vehicle according to the present invention is in a specific state according to a judgment of whether or not combustion is not stable due to excessive injection of fuel, abnormality of various sensors, or abnormal start of an accelerator. If after a certain state the first time (t 1), the time after the certain condition has passed (t 2) and the combustion cycle (ncyl) resetting the time the misfire is determined to be invalid, and not in the specified state a specific state first time (t 1 T 1 , and if ncyl = 0, it indicates that it is normal.If it is normal, it is determined whether the electric cylinder is in normal combustion state. If the time t 2 and the combustion cycle time are normal, that is, t 2 and ncyl = 0, misfire determination is performed.

이와같이 본 발명은 특정상태일 경우는 운전자의 조작미숙등의 외적요인에 의해 연소가 안정되지 않은 상태이므로 진정한 실화상태가 아님이 판단되어 실화무효판단을 내리고 특정 상태에 있지 않을 경우에는 특정상태의 최초시간과 특정상태 경과후의 시간에서 연소사이클의 정상상태를 판단하여 이에 따라 실화판정여부를 결정하도록 함으로써 실화판정의 정도를 향상시킬수 있는 것이다.As described above, in the present invention, since the combustion is not stabilized due to external factors such as the driver's inexperience of operation, it is determined that it is not a true misfire state, and thus, it is determined that it is not a true misfire state. It is possible to improve the degree of misfire determination by judging the steady state of the combustion cycle at the time and the time after the specific state has elapsed and determining whether misfire determination is made accordingly.

상기와 같이 본 발명은 특정상태에 있지 않을 경우 특정상태 최초시간과 특정상태경과후의 시간에서 연소사이클타임이 정상인가의 여부를 판단하여 이에 따라 실화판정의 유무가 결정되게 하여 특정상태가 경과된 후의 엔진의 안정영역이 확실하게 판정되고 실화판정의 정도를 향상시킬 수 있는 등의 이점이 있는 것이다.As described above, the present invention determines whether the combustion cycle time is normal at the initial time of the specific state and the time after the specific state has elapsed when it is not in the specific state, so that the presence or absence of misfire determination is determined accordingly. This is advantageous in that the stable area of the engine can be determined reliably and the degree of misfire determination can be improved.

Claims (1)

연소가 안정되지 않은 특정상태인지의 여부를 판단하고, 특정상태에 있을 경우 특정상태의 최초시간, 특정상태 경과후의 시간 및 연소사이클타임을 리셋팅한 후 실화판정을 무효로 하고, 특정상태에 있지 않을 경우 특정상태 최초시간과 연소사이클타임이 정상인지를 판단하여 정상일 경우 전기통이 정상 연소상태인지를 파악하고, 정상 연소상태이면 특정 시간경과후의 시간과 연소사이클타임이 정상인지를 판단하여 정상일 경우 실화판정이 실행되게 한 것을 특징으로 하는 자동차엔진의 실화검출시스템.It is determined whether the combustion is in a certain state that is not stable, and if it is in a specific state, the misfire determination is invalid after resetting the initial time of the specific state, the time after the specific state has elapsed, and the combustion cycle time. If not, determine if the initial state and combustion cycle time of the specific state are normal. If normal, determine whether the electric cylinder is in normal combustion state. If normal combustion state, determine whether the time after the specific time and combustion cycle time are normal. A misfire detection system for an automobile engine, wherein misfire determination is executed.
KR1019940029198A 1994-11-08 1994-11-08 Misfire detecting system of internal combustion engine KR100215664B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940029198A KR100215664B1 (en) 1994-11-08 1994-11-08 Misfire detecting system of internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940029198A KR100215664B1 (en) 1994-11-08 1994-11-08 Misfire detecting system of internal combustion engine

Publications (2)

Publication Number Publication Date
KR960018184A KR960018184A (en) 1996-06-17
KR100215664B1 true KR100215664B1 (en) 1999-08-16

Family

ID=19397370

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940029198A KR100215664B1 (en) 1994-11-08 1994-11-08 Misfire detecting system of internal combustion engine

Country Status (1)

Country Link
KR (1) KR100215664B1 (en)

Also Published As

Publication number Publication date
KR960018184A (en) 1996-06-17

Similar Documents

Publication Publication Date Title
JPH07127441A (en) Catalyst temperature detecting device for vehicle
US6439029B2 (en) Method of detecting a knock in an internal combustion engine by means of ionic current
US6907775B2 (en) Diagnosis apparatus and method of fuel pump for internal combustion engine
JPH0586953A (en) Crank angle and cylinder deciding method for internal combustion engine
US7131321B2 (en) Throttle system abnormality determination apparatus
JPH03100353A (en) Activation discriminating method for exhaust concentration sensor with heater
KR100215664B1 (en) Misfire detecting system of internal combustion engine
US5186148A (en) Abnormality detecting device for an automobile engine
JP4267667B2 (en) Monitoring device
KR910007341B1 (en) Fuel controller for an internal combustion engine
JP5980112B2 (en) Vehicle information storage processing device and vehicle information storage processing method
JPH06147000A (en) Misfire detector for internal combustion engine
JP5980083B2 (en) Vehicle information storage processing device and vehicle information storage processing method
JP3213160B2 (en) Ignition system abnormality detection method
JP2560506B2 (en) Sensor abnormality diagnosis method
JP3860994B2 (en) Misfire detection device for internal combustion engine
KR100219207B1 (en) Failure diagnosis method of pressure sensor at intake system
KR100345145B1 (en) Oil leakage-delecting method for common rail type diesel engine
JPH04194346A (en) Misfire detection device of internal combustion engine
KR0168370B1 (en) Intake air temperature sensor of internal combustion engine
JPH0893543A (en) Self-diagnostic device of cylinder pressure sensor and control fail-safe device on the basis of cylinder pressure in internal combustion engine
JPH04203252A (en) Device detecting and treating accidental fire in internal combustion engine for vehicle
JP3680504B2 (en) Spark plug diagnostic device for internal combustion engine
KR100353988B1 (en) An engine controlling system and the controlling method without throttle position sensor
JP2022181844A (en) Failure diagnosis device for fuel level sensor

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20030506

Year of fee payment: 5

LAPS Lapse due to unpaid annual fee