JPH05263695A - Catalyst converter protecting method of internal-combustion engine - Google Patents

Catalyst converter protecting method of internal-combustion engine

Info

Publication number
JPH05263695A
JPH05263695A JP4061894A JP6189492A JPH05263695A JP H05263695 A JPH05263695 A JP H05263695A JP 4061894 A JP4061894 A JP 4061894A JP 6189492 A JP6189492 A JP 6189492A JP H05263695 A JPH05263695 A JP H05263695A
Authority
JP
Japan
Prior art keywords
fuel
combustion engine
amount
catalyst converter
catalytic converter
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
JP4061894A
Other languages
Japanese (ja)
Other versions
JP3098842B2 (en
Inventor
Tatsuo Nakagawa
達雄 中川
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.)
Daihatsu Motor Co Ltd
Original Assignee
Daihatsu 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 Daihatsu Motor Co Ltd filed Critical Daihatsu Motor Co Ltd
Priority to JP04061894A priority Critical patent/JP3098842B2/en
Publication of JPH05263695A publication Critical patent/JPH05263695A/en
Application granted granted Critical
Publication of JP3098842B2 publication Critical patent/JP3098842B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N11/00Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2550/00Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/02Catalytic activity of catalytic converters
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/40Engine management systems

Abstract

PURPOSE:To prevent a catalyst converter from running temperature and being fusion damaged likely when the fuel residual amount lessens. CONSTITUTION:An internal combustion engine is equipped with a catalyst converter 7, which purifies the exhaust gas generated after combustion of the fuel supplied from a fuel tank 13 with a certain combustion pressure, wherein sensing is made whether the fuel amount in the fuel tank 13 is below a specified value L, and in such case, sensing is made that time combustion pressure has varied to be followed by stop of the fuel supply.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、主として自動車用の内
燃機関に取り付けられる触媒コンバータの溶損を防止す
る内燃機関の触媒コンバータ保護方法に関するものであ
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for protecting a catalytic converter of an internal combustion engine, which mainly prevents the catalytic converter attached to the internal combustion engine of an automobile from melting.

【0002】[0002]

【従来の技術】近年、排気ガス対策として触媒コンバー
タを装着している内燃機関が一般的になっている。この
ような内燃機関では、フューエルタンク内の燃料がごく
少量になった場合に、供給される燃料内に空気が混入し
て燃圧が低下し、そのために失火状態が発生し、排気ガ
スに含まれる酸素濃度が上昇して触媒コンバータの酸化
反応が進み、触媒コンバータが発熱して溶損することが
ある。このような事態になるのを防止するために、実開
昭62−38475号に記載された燃料残量の警告装置
のように、燃圧が設定値以下になったことを検出して内
燃機関を強制的に停止させるよう構成したものが知られ
ている。
2. Description of the Related Art In recent years, an internal combustion engine equipped with a catalytic converter has become popular as a measure against exhaust gas. In such an internal combustion engine, when the fuel in the fuel tank becomes extremely small, air is mixed into the supplied fuel to lower the fuel pressure, which causes a misfire state and is included in the exhaust gas. The oxygen concentration may increase, the oxidation reaction of the catalytic converter may proceed, and the catalytic converter may generate heat and melt. In order to prevent such a situation, the internal combustion engine is detected by detecting that the fuel pressure has dropped below a set value, as in the fuel level warning device described in Japanese Utility Model Laid-Open No. 62-38475. It is known that the device is configured to be forcibly stopped.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、上記装
置の構成にあっては、燃料量が少量となった場合、例え
ば登坂で車両が傾斜した状態になると、燃料ポンプのス
トレーナから空気が燃料に混入し、燃圧が低下する場合
があり、まだ走行可能な燃料残量にもかかわらず、内燃
機関を強制停止させることになり、触媒コンバータの溶
損は防止できるものの、機関停止状態が発生してはなは
だ不便なものであった。
However, in the structure of the above device, when the fuel amount becomes small, for example, when the vehicle leans on an uphill road, air is mixed into the fuel from the strainer of the fuel pump. However, the fuel pressure may drop, and the internal combustion engine is forcibly stopped despite the remaining fuel amount that can be traveled, and although melting damage of the catalytic converter can be prevented, the engine stop state must not occur. It was inconvenient.

【0004】本発明は、このような不具合を解消するこ
とを目的としている。
An object of the present invention is to eliminate such a problem.

【0005】[0005]

【課題を解決するための手段】本発明は、このような目
的を達成するために、次のような手段を講じたものであ
る。すなわち、本発明に係る内燃機関機の触媒コンバー
タ保護方法は、フューエルタンクから所定の燃圧で供給
される燃料を燃焼して排出される排気ガスを浄化する触
媒コンバータを備えてなる内燃機関において、フューエ
ルタンク内の燃料量が所定値以下であることを検出し、
かつその場合に燃圧が変動していることを検出し、燃料
の供給を停止することを特徴とする。
The present invention takes the following means in order to achieve such an object. That is, a method of protecting a catalytic converter of an internal combustion engine according to the present invention is an internal combustion engine including a catalytic converter that burns fuel supplied from a fuel tank at a predetermined fuel pressure to purify exhaust gas discharged from the fuel tank. Detects that the amount of fuel in the tank is below a specified value,
Further, in that case, it is characterized that the fuel supply is stopped by detecting that the fuel pressure is fluctuating.

【0006】[0006]

【作用】このような構成のものであれば、フューエルタ
ンク内の燃料量が少量になっただけでは燃料の供給は停
止されず、また燃圧が変動しているだけでも燃料の供給
は停止されない。つまり、燃料量が所定値以下になりな
おかつ燃圧が変動している場合に限り、燃料の供給を停
止する。したがって、燃料が走行し得る十分な量が残っ
ている場合に、燃圧が変動して走行が停止されるといっ
た不具合を解消でき、さらに、燃料がなく、かつその供
給される燃料内に空気が混入して失火が発生しやすい状
況にあっては、確実に燃料の供給を停止して触媒コンバ
ータが溶損することを防止することができる。
With this structure, the fuel supply is not stopped even if the fuel amount in the fuel tank becomes small, and the fuel supply is not stopped even if the fuel pressure fluctuates. That is, the fuel supply is stopped only when the fuel amount is still below the predetermined value and the fuel pressure is fluctuating. Therefore, when there is a sufficient amount of fuel that can travel, the problem that fuel pressure fluctuates and travel is stopped can be solved, and furthermore, there is no fuel and air is mixed in the supplied fuel. In a situation where misfire is likely to occur, it is possible to reliably stop the supply of fuel and prevent the catalytic converter from being melted.

【0007】[0007]

【実施例】以下、本発明の一実施例を、図面を参照して
説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

【0008】図1に概略的に示したエンジン100は自
動車用のもので、その吸気系1には図示しないアクセル
ペダルに応動して開閉するスロットルバルブが配設さ
れ、その下流側にはサージタンクが設けられている。サ
ージタンクに連通する吸気系1の吸気マニホルド2の一
方の端部近傍には、さらに燃料噴射弁3が設けてあり、
この燃料噴射弁3を、電子制御装置4により制御するよ
うにしている。
An engine 100 schematically shown in FIG. 1 is for an automobile, and an intake system 1 is provided with a throttle valve which opens and closes in response to an accelerator pedal (not shown), and a surge tank is provided downstream thereof. Is provided. A fuel injection valve 3 is further provided in the vicinity of one end of the intake manifold 2 of the intake system 1 communicating with the surge tank.
The fuel injection valve 3 is controlled by the electronic control unit 4.

【0009】燃料噴射弁3には、フューエルタンク13
の近傍に取り付けられる燃料ポンプ16からフューエル
タンク13内の燃料が所定の燃圧で供給されるように配
管されている。燃料ポンプ16は、エンジン100がク
ランキング中及び運転中である場合のみ作動するように
制御される。またフューエルタンク13内にはセンダ1
4とレシーバ(図示しない)とで構成されるフューエル
ゲージのうちのセンダ14が内蔵されている。このセン
ダ14は、その本体14aに内蔵される摺動抵抗部(図
示しない)と、フューエルタンク13内の燃料液面の変
化とともに動くフロート14bと、フロート14bの動
きを摺動抵抗部に伝達するアーム14cとで構成され
る。そして、フロート14bが上下すると、その変化が
アーム14cにより摺動抵抗部に伝達され、摺動抵抗部
の抵抗値が液面レベル相当のものになり、その抵抗値に
対応する電流信号によりレシーバの指針が振れて燃料量
が示される。
The fuel injection valve 3 includes a fuel tank 13
It is arranged so that the fuel in the fuel tank 13 is supplied at a predetermined fuel pressure from a fuel pump 16 mounted in the vicinity of. The fuel pump 16 is controlled to operate only when the engine 100 is cranking and operating. In the fuel tank 13, the sender 1
4 and a receiver (not shown), which is a fuel gauge, has a sender 14 incorporated therein. The sender 14 transmits a sliding resistance portion (not shown) built in the main body 14a, a float 14b that moves with a change in the fuel liquid level in the fuel tank 13, and a movement of the float 14b to the sliding resistance portion. It is composed of an arm 14c. When the float 14b moves up and down, the change is transmitted to the sliding resistance portion by the arm 14c, the resistance value of the sliding resistance portion becomes equivalent to the liquid level, and the current signal corresponding to the resistance value causes the receiver The pointer swings to indicate the fuel amount.

【0010】つぎに排気系5には、排気ガス中の酸素濃
度を測定するためのOセンサ6が、図示しないマフラ
に至るまでの管路に配設された三元触媒7の上流の位置
に取り付けられている。このOセンサ6からは、酸素
濃度に対応して電圧信号aが電子制御装置4に出力さ
れ、空燃比をフィードバック制御するのに利用される。
Next, in the exhaust system 5, an O 2 sensor 6 for measuring the oxygen concentration in the exhaust gas is located at a position upstream of the three-way catalyst 7 arranged in a pipe line leading to a muffler (not shown). Is attached to. A voltage signal a is output from the O 2 sensor 6 to the electronic control unit 4 in accordance with the oxygen concentration, and is used for feedback control of the air-fuel ratio.

【0011】電子制御装置4は、中央演算処理装置8
と、記憶装置9と、入力インターフェース10と、出力
インターフェース11とを具備してなるマイクロコンピ
ュータシステムを主体に構成されている。この入力イン
ターフェース10には、サージタンク内の圧力を検出す
るための吸気圧センサからの吸気圧信号b、エンジン回
転数NEを検出するための回転数センサからの回転数信
号c、車速を検出するための車速センサからの車速信号
d、スロットルバルブの開閉状態を検出するためのアイ
ドルスイッチからのLL信号e、エンジンの冷却水温を
検出するための水温センサからの水温信号f、上記した
センサ6からの電圧信号a、燃圧センサ12からの
燃圧信号g、フューエルタンク13内の燃料量を検出す
るフューエルゲージのセンダ14からのレベル信号hな
どが入力される。一方、出力インターフェース11から
は、燃料噴射弁3に対して燃料噴射信号kが、またスパ
ークプラグ15に対してイグニッションパルスmが出力
されるようになっている。
The electronic control unit 4 includes a central processing unit 8
And a storage device 9, an input interface 10, and an output interface 11 are mainly configured. The input interface 10 detects the intake pressure signal b from the intake pressure sensor for detecting the pressure in the surge tank, the rotation speed signal c from the rotation speed sensor for detecting the engine speed NE, and the vehicle speed. Vehicle speed signal d from the vehicle speed sensor, an LL signal e from an idle switch for detecting the opening / closing state of the throttle valve, a water temperature signal f from a water temperature sensor for detecting the cooling water temperature of the engine, the O 2 sensor described above. 6, the voltage signal a from the fuel pressure sensor 12, the fuel pressure signal g from the fuel pressure sensor 12, the level signal h from the fuel gauge sender 14 that detects the amount of fuel in the fuel tank 13, and the like. On the other hand, the output interface 11 outputs a fuel injection signal k to the fuel injection valve 3 and an ignition pulse m to the spark plug 15.

【0012】電子制御装置4には、上記した吸気圧セン
サから出力される吸気圧信号bと回転数センサから出力
される回転数信号cとを主な情報とし、エンジン状況に
応じて決まる各種の補正係数で基本噴射時間を補正して
燃料噴射弁開成時間すなわちインジェクタ最終通電時間
Tを決定し、その決定された通電時間により燃料噴射弁
3を制御して、エンジン負荷に応じた燃料を該燃料噴射
弁3から吸気系1に噴射させるための燃料噴射制御のた
めのプログラムが内蔵してある。
The electronic control unit 4 uses the intake pressure signal b output from the intake pressure sensor and the rotation speed signal c output from the rotation speed sensor as main information, and various kinds of information are determined depending on engine conditions. The basic injection time is corrected by the correction coefficient to determine the fuel injection valve opening time, that is, the injector final energization time T, and the fuel injection valve 3 is controlled according to the determined energization time to supply the fuel according to the engine load. A program for fuel injection control for injecting from the injection valve 3 to the intake system 1 is built in.

【0013】さらに、この電子制御装置4には、図2に
概略を示す、フューエルタンク13内の燃料量が所定値
以下であることを検出し、かつその場合に燃圧が変動し
ていることを検出し、燃料の供給を停止するプログラム
が内蔵してある。同図において、まずステップ51で
は、フューエルゲージのセンダ14の出力が設定された
所定値L以下であるか否かを判定し、以下であればステ
ップ52に移行し、そうでない場合はメインルーチンに
戻る。ここで、所定値Lは、凹凸の少ない平坦な道路を
走行できる程度の燃料量となる液面を検出できるような
値に設定すればよい。ステップ52では、燃圧が変動し
ているか否かを、燃圧センサ12の出力する燃圧信号g
の変動により判定し、変動がある場合はステップ53に
移行し、変動のない場合はメインルーチンに戻る。燃圧
の変動を判定する場合、下限値を設定し、その範囲から
外れる場合に変動したとして判定すればよい。ステップ
53では、燃料ポンプ16への通電を停止し、フューエ
ルカットを実行する。
Further, the electronic control unit 4 detects that the amount of fuel in the fuel tank 13 is below a predetermined value, which is schematically shown in FIG. 2, and that the fuel pressure fluctuates in that case. It has a built-in program to detect and stop the supply of fuel. In the figure, first, in step 51, it is determined whether or not the output of the fuel gauge sender 14 is less than or equal to a set predetermined value L, and if it is less than that, the process proceeds to step 52, and if not, the main routine is performed. Return. Here, the predetermined value L may be set to a value that allows detection of a liquid level that provides an amount of fuel that allows traveling on a flat road with few irregularities. In step 52, the fuel pressure signal g output from the fuel pressure sensor 12 is checked to see if the fuel pressure is fluctuating.
The determination is made based on the variation of No., and if there is variation, the process proceeds to step 53, and if there is no variation, the process returns to the main routine. When determining the fluctuation of the fuel pressure, a lower limit value may be set, and if it deviates from the range, it may be determined that the fluctuation has occurred. In step 53, the power supply to the fuel pump 16 is stopped and the fuel cut is executed.

【0014】このような構成によれば、車両が登坂ある
いは降坂途中の走行中に、フューエルゲージにより燃料
の残量が所定値L以下となったと判定された場合でも、
燃料ポンプ16に空気が混入することなく燃圧が変動し
ない場合には、制御はステップ51→ステップ52→メ
インルーチンと進むので、走行途中でフューエルカット
が実行されてエンジン100が停止することはない。ま
た、燃圧が変動して低下していないので、排気ガス中の
酸素濃度が上昇して触媒コンバータ7が酸化反応をする
こともない。
According to such a structure, even when the fuel gauge determines that the remaining amount of fuel has become equal to or less than the predetermined value L while the vehicle is traveling on an uphill or downhill,
When the fuel pressure does not fluctuate without air being mixed into the fuel pump 16, the control proceeds from step 51 to step 52 to the main routine, so that the fuel cut is not executed and the engine 100 is not stopped during the traveling. Further, since the fuel pressure has not fluctuated and decreased, the oxygen concentration in the exhaust gas does not increase and the catalytic converter 7 does not undergo an oxidation reaction.

【0015】一方、燃料が消費され、その残量が所定値
Lに対応する所定量以下になり、燃料ポンプ16内にし
ばしば空気が混入して燃圧が低下すると、制御はステッ
プ51→ステップ52→ステップ53と進み、触媒コン
バータ7が酸化反応により発熱する前にフューエルカッ
トによりエンジン100を停止する。したがって、発熱
により触媒コンバータ7が溶損することが防止できる。
On the other hand, when the fuel is consumed, the remaining amount becomes less than or equal to the predetermined amount corresponding to the predetermined value L, and air is often mixed in the fuel pump 16 to lower the fuel pressure, the control is performed in step 51 → step 52 → Proceeding to step 53, the engine 100 is stopped by the fuel cut before the catalytic converter 7 generates heat due to the oxidation reaction. Therefore, it is possible to prevent the catalytic converter 7 from being melted by heat generation.

【0016】なお、本発明は以上説明した実施例に限定
されるものではない。例えば、上記実施例ではフューエ
ルゲージを用いるものを説明したが、燃料残量が所定量
以下になると作動して信号を出力するフューエルレベル
スイッチを使用するものであってもよい。また、このよ
うなフューエルレベルスイッチと上記のフューエルゲー
ジとを組み合わせて使用し、フューエルタンク13が傾
いた状態つまり車両が坂の途中を走行しているような状
態であっても、走行に必要な十分な燃料残量が確実に検
出できるように構成すればよい。
The present invention is not limited to the embodiment described above. For example, although the fuel gauge is used in the above embodiment, a fuel level switch that operates to output a signal when the remaining fuel amount becomes equal to or less than a predetermined amount may be used. Further, by using such a fuel level switch in combination with the above fuel gauge, even if the fuel tank 13 is tilted, that is, the vehicle is traveling in the middle of a slope, it is necessary for traveling. It may be configured so that a sufficient amount of remaining fuel can be reliably detected.

【0017】さらに、燃圧の変動を検出する場合、突発
的な燃圧の低下による誤検出を防止するために、燃圧が
設定した下限値を連続して下回る回数をカウントし、そ
の回数が設定値以上となった場合に変動と判定するもの
であってもよい。
Further, in the case of detecting the fluctuation of the fuel pressure, in order to prevent erroneous detection due to the sudden decrease of the fuel pressure, the number of times the fuel pressure is continuously lower than the set lower limit value is counted, and the number of times is more than the set value If it becomes, it may be judged as a change.

【0018】その他、各部の構成は図示例に限定される
ものではなく、本発明の趣旨を逸脱しない範囲で種々変
形が可能である。
In addition, the configuration of each part is not limited to the illustrated example, and various modifications can be made without departing from the spirit of the present invention.

【0019】[0019]

【発明の効果】本発明は、以上に詳述したように、フュ
ーエルタンク内の燃料量が少量になっただけでは燃料の
供給は停止されず、また燃圧が変動しているだけでも燃
料の供給は停止されないので、フューエルタンクに走行
に十分な量の燃料がある場合に、燃圧が変動して燃料カ
ットにより走行が停止されるといった不具合が解消で
き、さらに、燃料の残量が所定値以下になり、かつその
供給される燃料内に空気が混入して失火が発生しやすい
状況になった場合には、燃料の供給を停止するので、触
媒コンバータが溶損することを確実に防止することがで
きる。
As described above in detail, according to the present invention, the fuel supply is not stopped only when the fuel amount in the fuel tank becomes small, and the fuel supply is achieved even if the fuel pressure fluctuates. Is not stopped, it is possible to solve the problem that when the fuel tank has a sufficient amount of fuel for traveling, the fuel pressure fluctuates and traveling is stopped due to fuel cut, and the remaining amount of fuel falls below a predetermined value. In addition, in the case where air is mixed in the supplied fuel and misfire is likely to occur, the fuel supply is stopped, so that it is possible to reliably prevent the catalytic converter from being melted and damaged. .

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

【図1】本発明の一実施例を示す概略構成説明図。FIG. 1 is a schematic configuration explanatory view showing an embodiment of the present invention.

【図2】同実施例の制御手順を示すフローチャート。FIG. 2 is a flowchart showing a control procedure of the embodiment.

【符号の説明】[Explanation of symbols]

3…燃料噴射弁 4…電子制御装置 7…触媒コンバータ 8…中央演算処理装置 9…記憶装置 10…入力インターフェース 11…出力インターフェース 12…燃圧センサ 13…フューエルタンク 14…センダ 16…燃料ポンプ 3 ... Fuel injection valve 4 ... Electronic control device 7 ... Catalytic converter 8 ... Central processing unit 9 ... Storage device 10 ... Input interface 11 ... Output interface 12 ... Fuel pressure sensor 13 ... Fuel tank 14 ... Sender 16 ... Fuel pump

フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 FI 技術表示箇所 F02M 37/08 D 7049−3G Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display area F02M 37/08 D 7049-3G

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】フューエルタンクから所定の燃圧で供給さ
れる燃料を燃焼して排出される排気ガスを浄化する触媒
コンバータを備えてなる内燃機関において、フューエル
タンク内の燃料量が所定値以下であることを検出し、か
つその場合に燃圧が変動していることを検出し、燃料の
供給を停止することを特徴とする内燃機関の触媒コンバ
ータ保護方法。
1. An internal combustion engine comprising a catalytic converter for purifying exhaust gas discharged by burning fuel supplied from a fuel tank at a predetermined fuel pressure, and the amount of fuel in the fuel tank is below a predetermined value. And a case where the fuel pressure is fluctuating in that case, and the supply of fuel is stopped, and a method for protecting a catalytic converter of an internal combustion engine is provided.
JP04061894A 1992-03-18 1992-03-18 Method for protecting catalytic converter of internal combustion engine Expired - Fee Related JP3098842B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP04061894A JP3098842B2 (en) 1992-03-18 1992-03-18 Method for protecting catalytic converter of internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP04061894A JP3098842B2 (en) 1992-03-18 1992-03-18 Method for protecting catalytic converter of internal combustion engine

Publications (2)

Publication Number Publication Date
JPH05263695A true JPH05263695A (en) 1993-10-12
JP3098842B2 JP3098842B2 (en) 2000-10-16

Family

ID=13184311

Family Applications (1)

Application Number Title Priority Date Filing Date
JP04061894A Expired - Fee Related JP3098842B2 (en) 1992-03-18 1992-03-18 Method for protecting catalytic converter of internal combustion engine

Country Status (1)

Country Link
JP (1) JP3098842B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013029041A (en) * 2011-07-27 2013-02-07 Yamashin-Filter Corp Device and method for treatment of drain
DE102014011524A1 (en) 2013-08-08 2015-02-12 Suzuki Motor Corporation Protection device for vehicle catalytic converter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013029041A (en) * 2011-07-27 2013-02-07 Yamashin-Filter Corp Device and method for treatment of drain
DE102014011524A1 (en) 2013-08-08 2015-02-12 Suzuki Motor Corporation Protection device for vehicle catalytic converter
DE102014011524B4 (en) 2013-08-08 2019-04-11 Suzuki Motor Corporation Protection device for vehicle catalytic converter

Also Published As

Publication number Publication date
JP3098842B2 (en) 2000-10-16

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