JPH02201045A - Fuel judging device for car - Google Patents
Fuel judging device for carInfo
- Publication number
- JPH02201045A JPH02201045A JP1021523A JP2152389A JPH02201045A JP H02201045 A JPH02201045 A JP H02201045A JP 1021523 A JP1021523 A JP 1021523A JP 2152389 A JP2152389 A JP 2152389A JP H02201045 A JPH02201045 A JP H02201045A
- Authority
- JP
- Japan
- Prior art keywords
- fuel ratio
- sensor
- air
- fuel
- output signal
- 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
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 108
- 238000002485 combustion reaction Methods 0.000 claims description 32
- 238000001514 detection method Methods 0.000 claims description 19
- 239000007789 gas Substances 0.000 abstract description 10
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000000567 combustion gas Substances 0.000 abstract 1
- 239000003054 catalyst Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Classifications
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は車両用燃料判定装置に係り、特にノンキング
を発生させることなく内燃機関の使用燃料を判定してこ
の使用燃料に応じて空燃比を制御し、内燃機関にかかる
負担を軽減し得る車両用燃料判定装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fuel determination device for a vehicle, and in particular, it determines the fuel used in an internal combustion engine without causing non-king, and adjusts the air-fuel ratio according to the fuel used. The present invention relates to a vehicle fuel determination device that can reduce the burden on an internal combustion engine.
内燃機関においては、燃料消費率の低減や排ガス有害成
分の低減を図るために、最良の燃焼状態を得るべき空燃
比に収束させるフィードバック制御方式の空燃比制御装
置が提案されている。空燃比制御装置は、排気系に設け
た排気センサである例えば０２センサから入力する濃度
信号たるリッチ信号およびリーン信号に基づいて供給燃
料量や供給空気量を制御して吸入混合気を所定の空燃比
に制御する。また、燃焼後において排ガス中の有害成分
を低減させるために、三元触媒などの触媒コンバータを
排気系に設けたものもある。更に、これら装置による排
ガス有害成分の低減機能を存効に作用させるためには、
鉛などを含有しない燃料を供給することが望ましい。In internal combustion engines, in order to reduce fuel consumption rate and harmful exhaust gas components, feedback control type air-fuel ratio control devices have been proposed that converge to the air-fuel ratio that should provide the best combustion state. The air-fuel ratio control device controls the amount of fuel to be supplied and the amount of air to be supplied based on a rich signal and a lean signal, which are concentration signals, input from an exhaust sensor installed in the exhaust system, such as an 02 sensor, to keep the intake air-fuel mixture at a predetermined air-fuel ratio. Control the fuel ratio. Additionally, some exhaust systems are equipped with a catalytic converter such as a three-way catalyst in order to reduce harmful components in exhaust gas after combustion. Furthermore, in order for these devices to effectively reduce harmful exhaust gas components,
It is desirable to supply fuel that does not contain lead, etc.
空燃比制御装置としては、例えば特開昭５７−７９２２
８号公報に開示されている。この公報に記載のものは、
特性の異なる複数個の空燃比検出センサを排気系に設け
、運転状態に応じて任意の−の空燃比検出センサからの
出力信号を取入れてアクチュエータの駆動制御を行い、
空燃比を変えて排気の浄化性能を維持しつつ燃費の向上
を図っている。As an air-fuel ratio control device, for example, Japanese Patent Application Laid-Open No. 57-7922
It is disclosed in Publication No. 8. What is stated in this bulletin is
A plurality of air-fuel ratio detection sensors with different characteristics are provided in the exhaust system, and the output signal from any one of the air-fuel ratio detection sensors is taken in depending on the operating state to control the drive of the actuator.
By changing the air-fuel ratio, we aim to improve fuel efficiency while maintaining exhaust purification performance.
また、内燃機関の駆動時のノッキングによるピストンや
バルブ等の破損を防止するために、内燃機間に設けたノ
ッキングセンサから入力するノッキング信号により点火
マ・ノブ等を切換えて点火時期をノンキング抑制する点
火時期に制御させている。In addition, in order to prevent damage to pistons, valves, etc. due to knocking when the internal combustion engine is running, the ignition control system uses a knocking signal input from a knocking sensor installed between the internal combustion engines to switch the ignition master knob, etc. to suppress the ignition timing. It is controlled by the timing.
ノッキングの抑制する装置においては、内燃機関に供給
される性状が異なる燃料である例えばレギュラーガソリ
ンとハイオクタンガソリンとを判別するために、ノッキ
ングの発生状態の相違を検出し、Ｍ？Ｂ手段の点火マ・
ノブ等を切換えている。In a device for suppressing knocking, in order to distinguish between fuels with different properties, such as regular gasoline and high-octane gasoline, which are supplied to an internal combustion engine, a difference in the state of occurrence of knocking is detected, and the M? Ignition of means B
Switching knobs, etc.
Ｃ発明が解決しようとする問題点〕
ところが、従来においては、内燃機関に供給している燃
料の性状の判別を、ノッキングセンサからのノンキング
信号状態によって行っているので、ノンキングは負荷が
大なる時に発生するために、内燃機関に負担が大きくか
かり、内燃機関が破壊するおそれがあるという不都合が
あった。[Problems to be solved by invention C] However, in the past, the properties of the fuel being supplied to the internal combustion engine were determined based on the state of the non-knocking signal from the knocking sensor, so the non-king signal was detected only when the load was large. This has the disadvantage of placing a large burden on the internal combustion engine, which may result in damage to the internal combustion engine.
そこでこの発明の目的は、上述の不都合を除去すべく、
排気センサの出力信号が反転した際に空燃比検出センサ
の出力状態を人力して使用燃料を判定するとともにこの
使用燃料に応じて内燃機関の空燃比を制御することによ
り、ノッキングを発生させることなく使用燃料を判定し
、内燃機関にかかる負担を軽減し得る車両用燃料判定装
置を実現するにある。Therefore, the purpose of this invention is to eliminate the above-mentioned disadvantages.
When the output signal of the exhaust sensor is reversed, the output state of the air-fuel ratio detection sensor is manually determined to determine the fuel used, and the air-fuel ratio of the internal combustion engine is controlled according to the fuel used, thereby eliminating knocking. An object of the present invention is to realize a fuel determination device for a vehicle that can determine the fuel used and reduce the burden on an internal combustion engine.
この目的を達成するためにこの発明は、内燃機関の排気
系に排ガス中の特定ガス濃度を検出して理論空燃比を境
に出力信号が反転する排気センサと空燃比に比例した信
号を出力する空燃比検出センサとを設け、前記排気セン
サの出力信号が反転した際に前記空燃比検出センサの出
力信号状態を入力して使用燃料を判定するとともにこの
使用燃料に応じて前記内燃機関の空燃比を制御する制御
手段を設けたことを特徴とする。To achieve this objective, the present invention includes an exhaust sensor in the exhaust system of an internal combustion engine that detects the concentration of a specific gas in the exhaust gas and whose output signal inverts at the stoichiometric air-fuel ratio, and outputs a signal proportional to the air-fuel ratio. an air-fuel ratio detection sensor, and when the output signal of the exhaust sensor is inverted, the output signal state of the air-fuel ratio detection sensor is input to determine the fuel used, and the air-fuel ratio of the internal combustion engine is determined according to the fuel used. The present invention is characterized in that it is provided with a control means for controlling.
この発明の構成によれば、制御手段は、排気センサと空
燃比検出センサとからの出力信号を入力し、排気センサ
の出力信号が反転した際に空燃比検出センサの出力信号
状態を入力して使用燃料を判定し、そしてこの使用燃料
に応じて空燃比を制御する。これにより、ノッキングを
発生させることなく使用燃料を判定し、内燃機関にかか
る負担を軽減し、内燃機関の保護を果し得る。According to the configuration of the invention, the control means inputs the output signals from the exhaust sensor and the air-fuel ratio detection sensor, and inputs the output signal state of the air-fuel ratio detection sensor when the output signal of the exhaust sensor is inverted. The fuel used is determined, and the air-fuel ratio is controlled according to the fuel used. This makes it possible to determine the fuel to be used without causing knocking, reduce the burden on the internal combustion engine, and protect the internal combustion engine.
（実施例〕
以下図面に基づいてこの発明の実施例を詳細且つ具体的
に説明する。(Examples) Examples of the present invention will be described below in detail and specifically based on the drawings.
第１〜４図は、この発明の実施例を示すものである０図
において、２は内燃機関、４はエアクリーナ、６は吸気
マニホルド、８は吸気通路、１０は吸気弁、１２は燃焼
室、１４は排気弁、１６は排気マニホルド、１８は排気
通路、２０はピストン、２２はピストンロンド、２４は
クランク軸である。吸気通路８には、吸気絞り弁２６が
配設されている。また、この吸気絞り弁２６の開度状態
を検出すべく、スロットル開度センサ２８が設けられて
いる。吸気マニホルド６には、燃焼室１２側に指向して
燃料を噴射する燃料噴射弁３０が取着されている。1 to 4 show an embodiment of the present invention. In FIG. 0, 2 is an internal combustion engine, 4 is an air cleaner, 6 is an intake manifold, 8 is an intake passage, 10 is an intake valve, 12 is a combustion chamber, 14 is an exhaust valve, 16 is an exhaust manifold, 18 is an exhaust passage, 20 is a piston, 22 is a piston rond, and 24 is a crankshaft. An intake throttle valve 26 is provided in the intake passage 8 . Further, a throttle opening sensor 28 is provided to detect the opening state of the intake throttle valve 26. A fuel injection valve 30 that injects fuel toward the combustion chamber 12 is attached to the intake manifold 6.
前記燃焼室１２に点火栓３２が臨んで設けられていると
ともに、この点火栓３２には点火コイル３４が連絡して
いる。An ignition plug 32 is provided facing the combustion chamber 12, and an ignition coil 34 is connected to the ignition plug 32.
一方、前記排気マニホルド１６には、排ガス中の特定ガ
スである酸素濃度を検出して理論空燃比を境に出力信号
が反転する排気センサである０２センサ３６と、燃焼ガ
スの空燃比に比例した信号を出力する空燃比検出センサ
３８とを設ける。即ち、第３．４図に示す如く、０２セ
ンサ３６は、使用燃料の理論空燃比によって出力信号が
リーン側あるいはリッチ側に反転する特性を有している
。On the other hand, the exhaust manifold 16 includes an 02 sensor 36, which is an exhaust sensor that detects the concentration of oxygen, which is a specific gas in the exhaust gas, and whose output signal inverts when the stoichiometric air-fuel ratio is reached, and an An air-fuel ratio detection sensor 38 that outputs a signal is provided. That is, as shown in FIG. 3.4, the 02 sensor 36 has a characteristic in which the output signal is reversed to the lean side or rich side depending on the stoichiometric air-fuel ratio of the fuel used.
また、第３図に示す如く、内燃機関２の燃料である例え
ばレギュラーガソリンの理論空燃比をλＲ、ハイオクタ
ンガソリンの理論空燃比λＨとすると、このとき、空燃
比検出センサ３８は、レギュラーガソリンの理論空燃比
λ日である場合にＶＲ値の信号を出力するとともに、ハ
イオクタンガソリンの理論空燃比λＨである場合にはｖ
８値の信号を出力する。Further, as shown in FIG. 3, if the stoichiometric air-fuel ratio of, for example, regular gasoline, which is the fuel for the internal combustion engine 2, is λR, and the stoichiometric air-fuel ratio of high-octane gasoline is λH, then the air-fuel ratio detection sensor 38 detects the When the stoichiometric air-fuel ratio is λ, a VR value signal is output, and when the stoichiometric air-fuel ratio of high-octane gasoline is λH, the VR value signal is output.
Outputs an 8-value signal.
更に、内燃機関２０回転状態を検出すべく、クランク軸
２４の回転を検出する機関回転数センサ４０が配設され
ている。Furthermore, in order to detect the rotational state of the internal combustion engine 20, an engine rotational speed sensor 40 that detects the rotation of the crankshaft 24 is provided.
前記スロットル開度センサ２８と燃料噴射弁３０と点火
コイル３４と０２センサ３６と空燃比検出センサ３８と
機関回転数センサ４０とは、制ｆ１手段４２に連絡して
いる。The throttle opening sensor 28, the fuel injection valve 30, the ignition coil 34, the 02 sensor 36, the air-fuel ratio detection sensor 38, and the engine speed sensor 40 are connected to a control f1 means 42.
この制’ａ手段４２は、０２センサ３６の出力信号が反
転した際に空燃比検出センサ３８の出力信号状態を入力
し、理論空燃比がその燃料開存のものであることから、
理論空燃比がλＲかλＨかを判断して現在の使用燃料が
レギュラーガソリンかハイオクガソリンかを判定し、判
定した使用燃料に応じて点火マツプや燃料マツプ等を変
更し、内燃機関２の空燃比を他の制御因子も加味して制
御するものである。This control means 42 inputs the output signal state of the air-fuel ratio detection sensor 38 when the output signal of the 02 sensor 36 is reversed, and since the stoichiometric air-fuel ratio is the one at which the fuel is open,
It determines whether the stoichiometric air-fuel ratio is λR or λH, determines whether the currently used fuel is regular gasoline or high-octane gasoline, changes the ignition map, fuel map, etc. according to the determined fuel, and adjusts the air-fuel ratio of the internal combustion engine 2. is controlled by taking other control factors into consideration.
また、第４図に示す如く、例えば符号ｔｌ、ｔ２が０２
センサ３６の出力信号の反転時であり、このとき、空燃
比検出センサ３８の出力信号は、使用燃料がレギュラー
ガソリンであるならば第４図の実線の如き変化し、一方
、使用燃料がハイオクガソリンであるならば第４図の破
線の如き変化するものである。つまり、排ガスの浄化シ
ステムとしても三元触媒システムが、理論空燃比に空燃
比を維持しなければ、その目的を達することがないので
、その目的を達成させるものである。これにより、制御
手段４２は、従来の如きノックセンサからのノッキング
信号状態を入力することなく、理論空燃比の相違により
、性状が異なるレギュラーガソリンとハイオクガソリン
とを１′Ｊ１定することができるものである。Further, as shown in FIG. 4, for example, the codes tl and t2 are 02
This is when the output signal of the sensor 36 is inverted. At this time, the output signal of the air-fuel ratio detection sensor 38 changes as shown by the solid line in FIG. 4 if the fuel used is regular gasoline, but on the other hand, if the fuel used is high-octane gasoline If so, the change will be as shown by the broken line in FIG. In other words, the three-way catalyst system as an exhaust gas purification system cannot achieve its purpose unless the air-fuel ratio is maintained at the stoichiometric air-fuel ratio. Thereby, the control means 42 can determine the difference between regular gasoline and high-octane gasoline, which have different properties due to the difference in stoichiometric air-fuel ratio, without inputting the knock signal state from the knock sensor as in the conventional case. It is.
次に、この実施例の作用を、第２図のフローチャートに
基づいて説明する。Next, the operation of this embodiment will be explained based on the flowchart of FIG.
プログラムがスタート（ステップ１０２）すると、先ず
、０２センサ３６がらの出力信号がリンチ（Ｌ）→リー
ン（Ｈ）に反転したか否がを判断しくステップ１０４）
、このステップ１０４において０２センサ３６が反転し
てＹＥＳの場合には、ステップ１０６において空燃比検
出センサ３８の出力信号Ｖ Ａ／Ｆを入力してこのＶ
Ａ／Ｆの値をＶｓｔｏｉｃに格納する。When the program starts (step 102), it is first determined whether the output signal from the 02 sensor 36 has reversed from lynch (L) to lean (H) (step 104).
, If the 02 sensor 36 is inverted and YES in this step 104, the output signal V A/F of the air-fuel ratio detection sensor 38 is inputted in step 106, and this V
Store the A/F value in Vstoic.
一方、前記ステップ１０４において０２センサ３６が反
転せずＮＯの場合には、ステップ１０８において０２セ
ンサ３６からの出力信号がリーン（Ｈ）−リンチ（Ｌ）
に反転したか否かを判断する。このステップ１０８にお
いて０２センサ３６が反転してＹＥＳの場合には、前記
ステップｌＯ６に移行させる。On the other hand, if the 02 sensor 36 is not inverted and the result is NO in step 104, the output signal from the 02 sensor 36 is changed to lean (H) - lynch (L) in step 108.
Determine whether or not it has reversed. In this step 108, if the 02 sensor 36 is reversed and the result is YES, the process proceeds to step 106.
一方、ステップ１０８において０２センサ３６からの出
力信号が反転せずＮＯの場合及びステップ１０６におい
てＶ Ａ／ＦをＶｓｔｏｉｃに格納した後は、ステップ
１１０においてＶｓｔｏｉｃ≧ｖＦ＋を判断する。On the other hand, if the output signal from the 02 sensor 36 is not inverted and the result is NO in step 108, and after the VA/F is stored at Vstoic in step 106, it is determined in step 110 whether Vstoic≧vF+.
このステップ１１０においてＶｓｔｏｉｃ≧Ｖ日でＹＥ
Ｓの場合には、ステップ１１２において使用燃料がレギ
ュラーガソリンと判定し、このステップ１１２において
ＦＬＧＨＯ→Ｏとし、他の制御因子をも加味し、使用す
るマツプを選定してレギュラーガソリンに応じた空燃比
のフィードバンク制御を行う。In this step 110, Vstoic≧V days and YE
In the case of S, the fuel used is determined to be regular gasoline in step 112, FLGHO is changed to O in step 112, and other control factors are taken into account, the map to be used is selected, and the air-fuel ratio is adjusted according to regular gasoline. Performs feed bank control.
一方、ステップ１１０においてＶｓｔｏｉｃ≧ｖ日でな
くＮｏの場合には、ステップ１１４においてＶｓｔｏｉ
ｃ≦Ｖ、を判断する。On the other hand, in step 110, if Vstoic≧v days and No, then in step 114, Vstoic
Determine c≦V.
このステップ１１４においてＶｓｔｏｉｃ≦■ＨでＹＥ
Ｓの場合には、ステ・７プ１１６においてハイオクタン
ガソリンであることを判定し、ステップ１１６において
ＦＬＧＨＯ＝１とし、ＦＬＧＨＯＯ値によって使用する
点火マツプ等を変更してハイオンクンガソリンに応じた
空燃比のフィードバンク制御を行う。In this step 114, Vstoic≦■H and YE.
In the case of S, it is determined in step 7 that it is high octane gasoline, and in step 116 FLGHO is set to 1, and the ignition map, etc. to be used is changed according to the FLGHOO value, and the air-fuel ratio is adjusted according to the high octane gasoline. Performs feed bank control.
また、ステップ１１４においてＶｓｔｏｉｃ≦ＶＨでな
くＮｏの場合には、中間の値なので、ステップ１１８に
おいてその比率Ｒ１
率Ｒによって両方のマツプを補間する。そして、各制御
後にリターン（ステップ１２０）させる。If Vstoic≦VH does not hold but No, in step 114, the value is an intermediate value, so in step 118, both maps are interpolated using the ratio R1. After each control, the process returns (step 120).
この結果、制御手段４２は、理論空燃比の相違によりレ
ギュラーガソリンとハイオクタンガソリンとを判定する
ので、ノッキングを生じさせることなく使用燃料を判定
することができ、内燃機関２に負担がかかるのを軽減し
、内燃機関２が破壊するのを未然に防止することができ
る。As a result, the control means 42 determines regular gasoline and high octane gasoline based on the difference in stoichiometric air-fuel ratio, so it can determine the fuel to be used without causing knocking, and reduces the burden on the internal combustion engine 2. It is possible to prevent the internal combustion engine 2 from being destroyed.
また、０２センサ３６からの出力信号によるフィードバ
ック領域以外の域においては、空燃比検出センサ３８か
らの出力信号によって空燃比のフィードバック制御を行
わせることができ、全領域において細かな空燃比のフィ
ードバンク制ｉ１Ｕを果し得る。Furthermore, in areas other than the feedback area based on the output signal from the 02 sensor 36, feedback control of the air-fuel ratio can be performed based on the output signal from the air-fuel ratio detection sensor 38, and a fine air-fuel ratio feedbank is provided in the entire area. It is possible to achieve control i1U.
更に、０２センサ３６からの出力信号のフィードバック
域においても、使用燃料を判定してしまえば、空燃比検
出センサ３８からの出力信号によって空燃比のフィード
バック制御することができ、高精度の空燃比のフィード
バック制御を果し得る。Furthermore, even in the feedback range of the output signal from the 02 sensor 36, once the fuel used is determined, the air-fuel ratio can be feedback-controlled by the output signal from the air-fuel ratio detection sensor 38, allowing highly accurate air-fuel ratio control. Feedback control can be achieved.
以上詳細な説明から明らかなようにこの発明によれば、
排気センサの出力信号が反転した際に空燃比検出センサ
の出力信号状態を入力して使用燃料を判定するとともに
この使用燃料に応じて内燃機関の空燃比を制御する制御
手段を設けたことにより、ノンキングを発生させること
なく使用燃料を判定し、内燃機関にかかる負担を軽減し
、内燃機関が破壊するのを未然に防止し得る。As is clear from the above detailed description, according to the present invention,
By providing a control means that determines the fuel to be used by inputting the output signal state of the air-fuel ratio detection sensor when the output signal of the exhaust sensor is inverted, and controls the air-fuel ratio of the internal combustion engine according to the fuel to be used, To determine the fuel to be used without causing non-king, to reduce the burden on the internal combustion engine, and to prevent the internal combustion engine from being destroyed.
【図面の簡単な説明】
第１〜４図はこの発明の実施例を示し、第１図は燃料判
定装置の概略図、第２図はこの実施例の作用を説明する
フローチャート、第３図はセンサ出力特性図、第４図は
フィードバック制御時のタイミングチャートである。
図において、２は内燃機関、８は吸気通路、１６は排気
マニホルド、１８は排気通路、３６は０２センサ、３８
は空燃比検出センサ、そして４２は制御手段である。[Brief Description of the Drawings] Figures 1 to 4 show an embodiment of the present invention. Figure 1 is a schematic diagram of a fuel determination device, Figure 2 is a flowchart explaining the operation of this embodiment, and Figure 3 is a flow chart explaining the operation of this embodiment. The sensor output characteristic diagram, FIG. 4, is a timing chart during feedback control. In the figure, 2 is an internal combustion engine, 8 is an intake passage, 16 is an exhaust manifold, 18 is an exhaust passage, 36 is an 02 sensor, 38
is an air-fuel ratio detection sensor, and 42 is a control means.
Claims (1)
して理論空燃比を境に出力信号が反転する排気センサと
空燃比に比例した信号を出力する空燃比検出センサとを
設け、前記排気センサの出力信号が反転した際に前記空
燃比検出センサの出力信号状態を入力して使用燃料を判
定するとともにこの使用燃料に応じて前記内燃機関の空
燃比を制御する制御手段を設けたことを特徴とする車両
用燃料判定装置。1. The exhaust system of the internal combustion engine is provided with an exhaust sensor that detects the concentration of a specific gas in the exhaust gas and whose output signal inverts after reaching the stoichiometric air-fuel ratio, and an air-fuel ratio detection sensor that outputs a signal proportional to the air-fuel ratio. A control means is provided for inputting the state of the output signal of the air-fuel ratio detection sensor to determine the fuel used when the output signal of the exhaust sensor is inverted, and for controlling the air-fuel ratio of the internal combustion engine according to the fuel used. A vehicle fuel determination device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1021523A JP2741689B2 (en) | 1989-01-31 | 1989-01-31 | Vehicle fuel judging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1021523A JP2741689B2 (en) | 1989-01-31 | 1989-01-31 | Vehicle fuel judging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02201045A true JPH02201045A (en) | 1990-08-09 |
| JP2741689B2 JP2741689B2 (en) | 1998-04-22 |
Family
ID=12057309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1021523A Expired - Lifetime JP2741689B2 (en) | 1989-01-31 | 1989-01-31 | Vehicle fuel judging device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2741689B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03271541A (en) * | 1990-03-22 | 1991-12-03 | Japan Electron Control Syst Co Ltd | Air-fuel ratio feedback control device of internal combustion engine |
| US20120174900A1 (en) * | 2010-12-24 | 2012-07-12 | Toyota Jidosha Kabushiki Kaisha | Apparatus and method for detecting variation abnormality in air-fuel ratio between cylinders |
-
1989
- 1989-01-31 JP JP1021523A patent/JP2741689B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03271541A (en) * | 1990-03-22 | 1991-12-03 | Japan Electron Control Syst Co Ltd | Air-fuel ratio feedback control device of internal combustion engine |
| US20120174900A1 (en) * | 2010-12-24 | 2012-07-12 | Toyota Jidosha Kabushiki Kaisha | Apparatus and method for detecting variation abnormality in air-fuel ratio between cylinders |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2741689B2 (en) | 1998-04-22 |
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