JPH04113244A - Device for detecting misfire of internal combustion engine - Google Patents

Device for detecting misfire of internal combustion engine

Info

Publication number
JPH04113244A
JPH04113244A JP23362790A JP23362790A JPH04113244A JP H04113244 A JPH04113244 A JP H04113244A JP 23362790 A JP23362790 A JP 23362790A JP 23362790 A JP23362790 A JP 23362790A JP H04113244 A JPH04113244 A JP H04113244A
Authority
JP
Japan
Prior art keywords
cylinder
misfire
crank
rotating time
crank angles
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP23362790A
Other languages
Japanese (ja)
Other versions
JP2757548B2 (en
Inventor
Toshio Takahata
敏夫 高畑
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP2233627A priority Critical patent/JP2757548B2/en
Publication of JPH04113244A publication Critical patent/JPH04113244A/en
Application granted granted Critical
Publication of JP2757548B2 publication Critical patent/JP2757548B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • G01M15/042—Testing internal-combustion engines by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12

Landscapes

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

Abstract

PURPOSE:To detect exactly a misfire of each cylinder of a four-cycle engine by determining the presence or absence of the misfire and a misfiring cylinder on the basis of comparison of a rotating time between the same crank angles with a rotating time between different crank angles. CONSTITUTION:An angle sensor 23 outputs an angle signal of a crank angle corresponding to the number of teeth of a ring gear 22 and sends it to a control unit 24. A crank angle sensor 25 detecting the crank angle is provided on the side of a cam shaft driven by a crankshaft 21 and a signal thereof is sent also to the control unit 24. The control unit 24 is constructed of a measuring circuit of a rotating time and a misfire discriminating circuit. The measuring circuit counts the signal from the angle sensor 23 and measures the rotating time between prescribed crank angles in a combustion stroke of each cylinder. The misfire discriminating circuit compares the rotating time between the crank angles in the same combustion stroke with the rotating time between the crank angles in different combustion strokes, in regard to the rotating time in each combustion stroke of each cylinder, and based on the comparison, misfire of each cylinder is discriminated.

Description

【発明の詳細な説明】 （産業上の利用分野〉 この発明は、内燃機関の失火を検出する装置に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a device for detecting misfire in an internal combustion engine.

（従来の技術） 内燃機関の着火ミス等による失火を検出する装置として
、機関のクランク角を検出する角度センサの信号から、
気筒の燃焼行程毎に所定のクランク角間の回転時間を計
測し、その回転時間の変動状態から気筒の失火を判別す
るものがある（特開昭５８−１９５３２号公報等参照〉
。(Prior Art) As a device for detecting misfires due to ignition errors in internal combustion engines, the system uses signals from an angle sensor that detects the crank angle of the engine.
There is a system that measures the rotation time between a predetermined crank angle for each cylinder combustion stroke, and determines cylinder misfire from the variation of the rotation time (see JP-A-58-19532, etc.)
.

（発明が解決しようとする課題） しかしながら、このような装置だと、４サイクル機関に
あって、燃焼行程が同一のクランク角にある気筒同志の
失火を判別するのが難しい。(Problems to be Solved by the Invention) However, with such a device, it is difficult to distinguish between misfires in cylinders in a four-stroke engine whose combustion strokes are at the same crank angle.

即ち、４サイクル６気筒機関のように、点火順序にした
がって＃１気筒と＃４気筒、＃２気筒と＃５気筒、＃３
気筒と＃６気筒の燃焼行程が同一のクランク角にある場
合、＃１．＃２．＃３気筒（または＃４．＃５．＃６気
筒）の失火に対しては、これらの気筒の燃焼行程中の回
転時間をそれぞれ＃４．＃５．＃６気筒（または＃１．
　＃２＃３気筒）の燃焼行程中の回転時間と比較するこ
とにより、各失火を判別できるのであるが、この場合＃
１気筒と＃４気筒のように燃焼行程が同一のクランク角
にある気筒がともに失火したときには、これらの間で燃
焼行程中の回転時間に差を生じることがなく、このため
失火があっても失火にないと判定してしまうのである。In other words, like a 4-cycle 6-cylinder engine, cylinders #1 and #4, cylinders #2 and #5, and cylinder #3 are fired according to the ignition order.
If the combustion strokes of cylinder #6 and #6 are at the same crank angle, #1. #2. In case of a misfire in the #3 cylinder (or #4, #5, or #6 cylinder), the rotation time during the combustion stroke of these cylinders should be changed to #4, respectively. #5. #6 cylinder (or #1.
Each misfire can be determined by comparing the rotation time during the combustion stroke of cylinder #2 and #3, but in this case,
When cylinders whose combustion strokes are at the same crank angle, such as cylinder #1 and cylinder #4, both misfire, there is no difference in rotation time during the combustion stroke between them, and therefore even if there is a misfire, It is determined that there is no misfire.

したがって、失火を必ずしも的確に検出することができ
ず、それほど高い信頼性は得られないのである。Therefore, it is not always possible to accurately detect a misfire, and very high reliability cannot be obtained.

この発明は、このような問題点を解決することを目的と
している。This invention aims to solve these problems.

（課題を解決するための手段） この発明は、第１図に示すように機関のクランク角を検
出する角度センサ１と、角度センサ１の信号から気筒の
燃焼行程毎に所定のクランク角間の回転時間を計測する
手段２とを備え、その回転時間の変動状態から気筒の失
火を判別する内燃機関の失火検出装置において、同一の
クランク角間の回転時間を比較する手段３と、異なるク
ランク角間の回転時間を比較する手段４と、これらの比
較に基づき失火の有無および失火気筒を判定する手段５
とを設ける。(Means for Solving the Problems) As shown in FIG. 1, the present invention includes an angle sensor 1 that detects the crank angle of an engine, and a rotation between a predetermined crank angle for each combustion stroke of a cylinder based on a signal from the angle sensor 1. In the misfire detection device for an internal combustion engine, the misfire detection device for an internal combustion engine is provided with means 2 for measuring time, and for determining a misfire in a cylinder based on the variation state of the rotation time. A means 4 for comparing times, and a means 5 for determining the presence or absence of a misfire and the misfiring cylinder based on these comparisons.
and.

（作用） 即ち、４サイクル機関にあって、ある気筒が失火した場
合、その燃焼行程中（所定のクランク角間）の回転時間
を同一のクランク角の気筒の燃焼行程中の回転時間と比
較し、その差から当該気筒の失火を判別する。(Operation) That is, when a certain cylinder misfires in a four-cycle engine, the rotation time during the combustion stroke (between predetermined crank angles) is compared with the rotation time during the combustion stroke of a cylinder with the same crank angle, Based on the difference, a misfire in the relevant cylinder is determined.

そして、差がないときは、回転時間を異なるクランク角
の気筒の燃焼行程中の回転時間と比較し、これらに差が
あり、かつクランク１回転前の同しクランク位置でも差
があれば、当該気筒を失火と判定する。If there is no difference, compare the rotation time with the rotation time during the combustion stroke of cylinders with different crank angles, and if there is a difference between them and even at the same crank position before one crank revolution, the The cylinder is determined to have misfired.

これにより、燃焼行程が同一のクランク角にある気筒の
一方の失火および両方の失火に対し、失火気筒を的確に
検出できる。Thereby, a misfiring cylinder can be accurately detected with respect to one misfire or both cylinders whose combustion strokes are at the same crank angle.

（実施例） 第２図は本発明の実施例を示すもので、２０は４サイク
ルエンジン、２１はそのクランク軸、２２はクランク軸
２１端のフライホイールの外周に形成したリングギヤで
ある。(Embodiment) FIG. 2 shows an embodiment of the present invention, in which 20 is a four-stroke engine, 21 is its crankshaft, and 22 is a ring gear formed on the outer periphery of a flywheel at the end of the crankshaft 21.

そして、リングギヤ２２に対峙して、リングギヤ２２の
歯が磁界を断続することで信号を出力する角度センサ〈
磁気センサ〉２３が設！される。An angle sensor that faces the ring gear 22 and outputs a signal by the teeth of the ring gear 22 intermittent magnetic field.
Magnetic sensor〉23 installed! be done.

角度センサ２３は、リングギヤ２２の歯数に応じクラン
ク角の数度毎に角度信号を出力し、その角度信号はコン
トロールユニット２４に送られる。The angle sensor 23 outputs an angle signal every several degrees of the crank angle according to the number of teeth of the ring gear 22, and the angle signal is sent to the control unit 24.

Ｊた、クランク軸２１に駆動される図示しないカム軸側
にクランク角を検出するクランク角センサ２５が設けら
れ、その信号もコントロールユニット２４に送られる。Additionally, a crank angle sensor 25 for detecting a crank angle is provided on the side of a camshaft (not shown) driven by the crankshaft 21, and its signal is also sent to the control unit 24.

コントロールユニット２４は、回転時間の計測回路と、
失火判別回路から構成される。計測回路は、第３図、第
４図のように気筒判別部２６．２つのプリセットカウン
タ２７．２８、発信器２９、タイマ３０からなり、クラ
ンク角センサ２５の気筒判別信号（ｐｏｓ信号〉、基準
位置信号（ＲＥＦ信号）を基準に角度センサ２３からの
信号をカウントし、このカウント値から各気筒の燃焼行
程中の所定のクランク角間の回転時間ＴＩＮＴを計測す
る。なお、クランク角センサ２５が角度センサ２３を兼
ねても良い。The control unit 24 includes a rotation time measurement circuit,
Consists of a misfire discrimination circuit. The measurement circuit consists of a cylinder discrimination section 26, two preset counters 27 and 28, a transmitter 29, and a timer 30, as shown in FIGS. The signal from the angle sensor 23 is counted based on the position signal (REF signal), and the rotation time TINT between predetermined crank angles during the combustion stroke of each cylinder is measured from this count value. It may also serve as the sensor 23.

そして、失火判別回路は、各気筒の燃焼行程毎の回転時
間ＴＬＮＴを、燃焼行程が同一のクランク角間の回転時
間および燃焼行程が異なるクランク角間の回転時間と比
較し、この比較をもとに各気筒の失火を判別する。Then, the misfire discrimination circuit compares the rotation time TLNT for each combustion stroke of each cylinder with the rotation time between crank angles with the same combustion stroke and the rotation time between crank angles with different combustion strokes, and based on this comparison, each cylinder Determine cylinder misfire.

次に、制御内容を第５図〜第８図のフローチャートに基
づいて説明する。Next, the control contents will be explained based on the flowcharts shown in FIGS. 5 to 8.

第５図はメインフローを示すもので、失火の詮所を行う
際の条件を満たしている場合に、１燃焼サイクル毎に回
転時間Ｔ工ＮＴの計測を行い、新しいものからＴｌＮＴ
ｌ〜ＴＩ　ＮＴ９として更新記憶される（ステップ１０
１，１０２）。Figure 5 shows the main flow. When the conditions for investigating misfires are met, the rotation time T and NT are measured for each combustion cycle, and the rotation time TlNT is measured starting from the newest one.
1~TINT9 (step 10)
1,102).

詮所条件は、第８図のように車速■ＳＰが安定しており
、スロットル弁の開度の変化ΔＴＶＯが小さく、電気負
荷ＳＷ、パワーステアリングＳＷが一定で、かつエンジ
ン回転数Ｎ、燃料供給量Ｔｐが所定範囲にある通常状態
にあること等である。As shown in Figure 8, the following conditions are: vehicle speed SP is stable, throttle valve opening change ΔTVO is small, electrical load SW and power steering SW are constant, and engine speed N and fuel supply are constant. For example, the amount Tp is in a normal state within a predetermined range.

そして、計測した回転時間ＴＩＮＴをもとに、パラメー
タを算出する（ステップ１０３）。Then, parameters are calculated based on the measured rotation time TINT (step 103).

ここで、４サイクル６気筒エンジンの場合、最新の回転
時間ＴｌＮＴｌを計測した時点でその５つ前の気筒のＴ
ＩＮＴ６のパラメータを、即ちＴｌＮＴｌか＃１気筒の
ものであれば、その時点で＃６気筒のＴＩＮＴのパラメ
ータを算出する。Here, in the case of a 4-cycle 6-cylinder engine, at the time when the latest rotation time TlNTl is measured, the T
If the parameter of INT6 is TlNTl or that of cylinder #1, then the parameter of TINT of cylinder #6 is calculated at that point.

このパラメータは、第６図（Ａ＞、（Ｂ）のように燃料
行程が異なるクランク角間の回・転時間を比較するため
のパラメータＭＩＳＡと、燃料行程が同一のクランク角
間の回転時間を比較するためのパラメータＭＩＳＢとか
らなり、パラメータＭＩＳＡ、ＭＩＳＢは次式にて求め
る（ステップ２０１）。This parameter is used to compare the rotation time between crank angles with the same fuel stroke and the parameter MISA, which is used to compare the rotation time between crank angles with different fuel strokes as shown in Figure 6 (A>, (B)). The parameters MISA and MISB are determined by the following equation (step 201).

ＭＩ　ＳＡ＝　＋　（ＴＩＮＴ６−ＴＩＮＴ７）Ｘ５＋
　　（ＴＩＮＴ６−ＴＩＮＴＩ）） ／ＴＩＮＴ９り ＭＩＳＢ　　−ＩＴＩＮＴ６−ＴＩＮＴ９）ｘ３＋　　
（ＴＩＮＴ６−ＴＩＮＴ３）Ｘ３）／ＴＩＮＴ９” この場合、点火順序が＃１→＃２→＃３→＃４→＃５→
＃６の順でおこなわれるエンジンであれば、ＴｌＮＴｌ
を＃６気筒のものとすると、ＴＩＮＴ６は＃１気筒の値
、ＴＩＮＴ３は＃４気筒の値、Ｔ　Ｉ　Ｎ　Ｔ　７はＴ
ｌＮＴｌの前回の値、ＴＩＮＴ９はＴＩＮＴ３の前回の
値を示す。また、乗数５．３は燃焼間隔に対する加速時
等の補正分を、Ｔ　Ｉ　ＮＴ９コはエンジン回転数に対
する補正分を示す。MI SA= + (TINT6-TINT7)X5+
(TINT6-TINTI)) /TINT9 MISB -ITINT6-TINT9)x3+
(TINT6-TINT3)X3)/TINT9” In this case, the firing order is #1 → #2 → #3 → #4 → #5 →
If the engine is run in the order of #6, TlNTl
is for cylinder #6, TINT6 is the value of cylinder #1, TINT3 is the value of cylinder #4, TINT7 is T
The previous value of lNTl, TINT9, indicates the previous value of TINT3. Further, the multiplier 5.3 indicates a correction amount for the combustion interval during acceleration, etc., and the multiplier 5.3 indicates a correction amount for the engine rotation speed.

即ち、パラメータＭＩＳＡは、ＴＩＮＴ６が失火により
大きくなると、〉Ｏとなる。また、パラメータＭＩＳＢ
は、ＴＩＮＴ６（例えば＃１気筒）が失火にあるときは
〉Ｏとなる一方、＃１．＃４気筒が失火でＴＩＮＴ９．
６．３がともに大きいときは＝０となる。That is, the parameter MISA becomes 〉O when TINT6 increases due to a misfire. Also, the parameter MISB
is 〉O when TINT6 (for example, #1 cylinder) is misfiring, while #1. #4 cylinder misfired and TINT9.
When both 6.3 are large, it becomes =0.

そして、パラメ・−タＭＩＳＡ、ＭＩＳＢをそれぞれ所
定値と比較し、所定値よりも大きい場合、フラグＦＬＧ
Ａ、Ｂに“１″を立てる。同時に、３気筒前の計測時に
フラグＦＬＧＡがパ１”であったかどうかを確認し、“
１”の場合にフラグＦＬＧＣに“１″を立てる（ステッ
プ２０２〜２１０）そして、フラグＦＬＧＡ、Ｂがとも
に１”またはフラグＦＬＧＡとＣが°“１″の場合は、
ＴＩＮＴ６の該当気筒の失火カウンタＭＦＣＮＴを±１
する（ステラ７２１１〜２１４〉。Then, the parameters MISA and MISB are compared with respective predetermined values, and if they are larger than the predetermined values, the flag FLG is
Set “1” to A and B. At the same time, check whether the flag FLGA was "Pa1" when measuring three cylinders ago, and
1", flag FLGC is set to "1" (steps 202 to 210), and when flags FLGA and B are both 1" or flags FLGA and C are "1",
Set the misfire counter MFCNT of the relevant cylinder of TINT6 to ±1.
(Stella 7211-214).

フラグＦＬＧＡ、Ｂがともに“１″の場合は、ＴＩＮＴ
６の該当気筒が失火にある。また、ＴＩＮＴ６の該当気
筒が失火にあっても、燃焼行程が同一のクランク角間の
ＴＩＮＴ３　　ＴＩＮＴ９の該当気筒も失火にあるとき
はフラグＦＬＧＢが“Ｏ”になるが、この場合フラグＦ
ＬＧＡ＝“１゛および３回前の失火判定で失火と判定し
た場合のフラグＦＬＧＣ＝“１”をもとに、ＴＩＮＴ６
の該当気筒の失火を判別できる。If flags FLGA and B are both “1”, TINT
The relevant cylinder of number 6 is misfiring. Furthermore, even if the corresponding cylinder of TINT6 is misfiring, if the corresponding cylinder of TINT3 and TINT9 whose combustion stroke is at the same crank angle is also misfiring, the flag FLGB becomes "O".
Based on LGA="1" and the flag FLGC="1" when a misfire was determined to be a misfire three times before, TINT6 is set.
A misfire in the relevant cylinder can be determined.

そして、各データ計算を終了するとくエンジンの所定回
転ｆ＊）、故障判定（失火判定）に入り（ステップ１０
４，１０５）、故障判定では第７図のように失火カウン
タＭＦＣＮＴの値が所定値を越えた気筒を失火と判定す
る（ステップ３０１〜３０３）。Then, when each data calculation is completed (the specified engine speed f*), failure determination (misfire determination) begins (step 10).
4, 105), in the failure determination, a cylinder in which the value of the misfire counter MFCNT exceeds a predetermined value as shown in FIG. 7 is determined to be a misfire (steps 301 to 303).

このように各気筒の燃焼行程中の所定のクランク角間の
回転時間を計測し、燃焼行程が同一のクランク角間の回
転時間および燃焼行程が異なるクランク角間の回転時間
を比較し、これらの比較をもとに失火を判別するので、
４サイクルエンジンであっても、失火および失火気筒を
的確に検出することができる。In this way, the rotation time between predetermined crank angles during the combustion stroke of each cylinder is measured, and the rotation time between crank angles with the same combustion stroke and the rotation time between crank angles with different combustion strokes are compared. Since it detects misfires,
Even in a 4-cycle engine, misfires and misfired cylinders can be accurately detected.

即ち、ある１つの気筒が失火にある場合、当該気筒の燃
焼行程中の回転時間は、他の気筒の燃料行程クランク角
間の回転時間よりも大きくなり、このときパラメータＭ
ＩＳＡ、ＭＩＳＢが所定値を越えるので、当該気筒が失
火にあると判別てきる。That is, when one cylinder is misfiring, the rotation time during the combustion stroke of that cylinder becomes larger than the rotation time between fuel stroke crank angles of the other cylinders, and in this case, the parameter M
Since ISA and MISB exceed predetermined values, it is determined that the cylinder in question is in a misfire state.

一方、燃焼行程が同一のクランク角にある２つの気筒が
ともに失火した場合、同一のクランク角間の回転時間の
比較だけでは差が出ないため、パラメータＭＩＳＢから
は失火を判別できないが、この場合それぞれの回転時間
を燃焼行程が異なるクランク角間の回転時間と比較する
ことで、それぞれのパラメータＭＩＳＡから両気筒の失
火をそれぞれ単独に判別するので、燃焼行程が同一のク
ランク角にある気筒同志が失火した場合にあっても、こ
れらの失火を確実に判別することができる。On the other hand, if two cylinders whose combustion strokes are at the same crank angle both misfire, the misfire cannot be determined from the parameter MISB because there is no difference just by comparing the rotation times between the same crank angles. By comparing the rotation time of the combustion stroke with the rotation time between crank angles at different combustion strokes, misfires in both cylinders can be independently determined from each parameter MISA. Even in such cases, these misfires can be reliably determined.

したがって、各気筒の失火を的確に検出することができ
、信頼性が大幅に向上する。Therefore, misfire in each cylinder can be accurately detected, and reliability is greatly improved.

（発明の効果） 以上のようにこの発明によれば、機関のクランク角を検
出する角度センサと、角度センサの信号から気筒の燃焼
行程毎に所定のクランク角間の回転時間を計測する手段
とを備え、その回転時間の変動状態から気筒の失火を判
別する内燃機関の失火検出装置において、同一のクラン
ク角間の回転時間を比較する手段と、異なるクランク角
間の回転時間を比較する手段と、これらの比較に基づき
失火の有無および失火気筒を判定する手段とを設けたの
で、４サイクル機関の各気筒の失火を的確に検出するこ
とができ、検出装置としての高い信頼性を確保できる。(Effects of the Invention) As described above, according to the present invention, an angle sensor for detecting the crank angle of an engine and a means for measuring the rotation time between a predetermined crank angle for each combustion stroke of a cylinder from a signal from the angle sensor are provided. A misfire detection device for an internal combustion engine that determines a misfire in a cylinder based on a fluctuation state of the rotation time, comprising means for comparing rotation times between the same crank angles, means for comparing rotation times between different crank angles, and a means for comparing rotation times between different crank angles. Since a means for determining the presence or absence of a misfire and the misfiring cylinder based on comparison is provided, it is possible to accurately detect a misfire in each cylinder of a four-stroke engine, and high reliability as a detection device can be ensured.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の構成図、第２図は本発明の実施例を示
す構成図、第３図、第４図は回転時間の計測回路を示す
ブロック図とタイミングチャート、第５図〜第８図は制
御内容を示すフローチャートである。 ２１　クランク軸、２２・・・リングギア、２３゜角度
センサ、２４・コントロールユニット、２５・・クラン
ク角センサ 第 図 第 図 第 因（Ａ） 第 図 第 図（Ｂ） 第 図Fig. 1 is a block diagram of the present invention, Fig. 2 is a block diagram showing an embodiment of the present invention, Figs. 3 and 4 are block diagrams and timing charts showing a rotation time measuring circuit, and Figs. FIG. 8 is a flowchart showing the control details. 21 Crankshaft, 22...Ring gear, 23° angle sensor, 24-Control unit, 25...Crank angle sensor (A) (A) (B) (B)

Claims (1)

【特許請求の範囲】[Claims] 機関のクランク角を検出する角度センサと、角度センサ
の信号から気筒の燃焼行程毎に所定のクランク角間の回
転時間を計測する手段とを備え、その回転時間の変動状
態から気筒の失火を判別する内燃機関の失火検出装置に
おいて、同一のクランク角間の回転時間を比較する手段
と、異なるクランク角間の回転時間を比較する手段と、
これらの比較に基づき失火の有無および失火気筒を判定
する手段とを設けたことを特徴とする内燃機関の失火検
出装置。It is equipped with an angle sensor that detects the crank angle of the engine, and a means for measuring the rotation time between a predetermined crank angle for each combustion stroke of the cylinder from the signal of the angle sensor, and a misfire in the cylinder is determined from the fluctuation state of the rotation time. In a misfire detection device for an internal combustion engine, means for comparing rotation times between the same crank angles, means for comparing rotation times between different crank angles,
A misfire detection device for an internal combustion engine, comprising means for determining the presence or absence of a misfire and a misfiring cylinder based on these comparisons.
JP2233627A 1990-09-04 1990-09-04 Misfire detection device for internal combustion engine Expired - Fee Related JP2757548B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2233627A JP2757548B2 (en) 1990-09-04 1990-09-04 Misfire detection device for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2233627A JP2757548B2 (en) 1990-09-04 1990-09-04 Misfire detection device for internal combustion engine

Publications (2)

Publication Number Publication Date
JPH04113244A true JPH04113244A (en) 1992-04-14
JP2757548B2 JP2757548B2 (en) 1998-05-25

Family

ID=16958010

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2233627A Expired - Fee Related JP2757548B2 (en) 1990-09-04 1990-09-04 Misfire detection device for internal combustion engine

Country Status (1)

Country Link
JP (1) JP2757548B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05340293A (en) * 1992-06-09 1993-12-21 Mitsubishi Motors Corp Misfire detection method by crank shaft rotation fluctuation
JPH062609A (en) * 1992-06-15 1994-01-11 Mitsubishi Electric Corp Misfire detection device of internal combustion engine
US5954784A (en) * 1996-07-16 1999-09-21 Nissan Motor Co., Ltd. Engine misfire diagnosis apparatus
US6055469A (en) * 1996-07-03 2000-04-25 Nissan Motor Co., Ltd. Fault determining device for torque transmission state sensor, and engine misfiring diagnosis device
US6453734B1 (en) 1998-04-28 2002-09-24 Nissan Motor Co., Ltd Diagnosis for EGR system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05340293A (en) * 1992-06-09 1993-12-21 Mitsubishi Motors Corp Misfire detection method by crank shaft rotation fluctuation
JPH062609A (en) * 1992-06-15 1994-01-11 Mitsubishi Electric Corp Misfire detection device of internal combustion engine
US6055469A (en) * 1996-07-03 2000-04-25 Nissan Motor Co., Ltd. Fault determining device for torque transmission state sensor, and engine misfiring diagnosis device
US5954784A (en) * 1996-07-16 1999-09-21 Nissan Motor Co., Ltd. Engine misfire diagnosis apparatus
US6453734B1 (en) 1998-04-28 2002-09-24 Nissan Motor Co., Ltd Diagnosis for EGR system

Also Published As

Publication number Publication date
JP2757548B2 (en) 1998-05-25

Similar Documents

Publication Publication Date Title
AU644103B2 (en) Engine diagnostic apparatus and method
US5906651A (en) Misfire detecting device of multicylinder internal combustion engine
JPH04262225A (en) Misfire detecting method for internal combustion engine
JP3463476B2 (en) Misfire detection device for multi-cylinder internal combustion engine
JPH0658196A (en) Miss fire detecting device
JP2666232B2 (en) Device for detecting combustion state of internal combustion engine
US5638278A (en) Apparatus for detecting an occurence of misfiring in an engine cylinder
JPH06129298A (en) Misfire detection device of internal combustion engine
US6023964A (en) Misfire diagnosis method and apparatus of internal combustion engine
JP2807737B2 (en) Device for detecting combustion state of internal combustion engine
JPH0693919A (en) Combustion condition detection device for internal combustion engine
JPH04113244A (en) Device for detecting misfire of internal combustion engine
US5560341A (en) Apparatus and method for diagnosing occurrence of misfire in multi-cylinder internal combustion engine
JPH04101071A (en) Misfire detecting device for internal combustion engine
JP2800409B2 (en) Misfire detection device for internal combustion engine
JPH0754704A (en) Combustion state judgement device for internal combustion engine
JP3063007B2 (en) Misfire diagnosis device for internal combustion engine
JP2889651B2 (en) Misfire detection device for internal combustion engine
JP2796198B2 (en) Misfire detection device for internal combustion engine
JP2559516B2 (en) Combustion state detection device for internal combustion engine
JP2578247B2 (en) Misfire detection device for internal combustion engines for vehicles
JPH07119532A (en) Misfire detection device for internal combustion engine
JPH03225079A (en) Misfire diagnostic device for internal combustion engine
JPH05195856A (en) Misfire detecting method for internal combustion engine
JP2005307945A (en) Misfire determining device for internal combustion engine

Legal Events

Date Code Title Description
FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090313

Year of fee payment: 11

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100313

Year of fee payment: 12

LAPS Cancellation because of no payment of annual fees