JP5828747B2 - Fuel level judgment device - Google Patents

Fuel level judgment device Download PDF

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JP5828747B2
JP5828747B2 JP2011261456A JP2011261456A JP5828747B2 JP 5828747 B2 JP5828747 B2 JP 5828747B2 JP 2011261456 A JP2011261456 A JP 2011261456A JP 2011261456 A JP2011261456 A JP 2011261456A JP 5828747 B2 JP5828747 B2 JP 5828747B2
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fuel
remaining amount
amount
vehicle body
remaining
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JP2013113249A (en
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直樹 大治
直樹 大治
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Daihatsu Motor Co Ltd
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Description

本発明は、内燃機関を搭載した車両等に用いられる燃料残量判定装置に関する。   The present invention relates to a fuel remaining amount determination device used for a vehicle or the like equipped with an internal combustion engine.

従来より、内燃機関を搭載した車両において、燃料の残量を検知する燃料検知手段を設けることが広く行われてきている。このような燃料検知手段として、例えば、燃料の液面の変化に追随してその上下位置が変化するフロートと、このフロートに接続してなるアームと、このアームを支持する本体と、前記アームの本体に対する相対位置を検知するセンサとを備えたものが広く用いられている。そして、センサが検知したアームの本体に対する相対位置に対応する燃料の残量等を運転者に視認可能に表示する燃料残量表示手段が車両に設けられている（例えば、特許文献１を参照）。   Conventionally, in vehicles equipped with an internal combustion engine, it has been widely practiced to provide fuel detection means for detecting the remaining amount of fuel. As such a fuel detection means, for example, a float whose vertical position changes following a change in the liquid level of the fuel, an arm connected to the float, a main body supporting the arm, A sensor provided with a sensor for detecting a relative position with respect to the main body is widely used. Fuel remaining amount display means for displaying the remaining amount of fuel corresponding to the relative position of the arm detected by the sensor to the driver so as to be visible to the driver is provided in the vehicle (see, for example, Patent Document 1). .

このような構成においては、前記フロートがその可動範囲の下限に達した際には燃料タンク内に燃料がある程度残っているように設定してあるが、前記燃料残量表示手段による表示では、燃料の残量がフロートの可動範囲の下限に対応する量以下である場合には実際の燃料の残量に関わらず最低値であることのみが表示される。すなわち、燃料の残量が最低値を示した後もしばらくの間は燃料タンクから燃料噴射弁に燃料の供給が正常に行われるので、給油を行わずそのまま車両を走行させ続けることが起こり得る。   In such a configuration, when the float reaches the lower limit of its movable range, a certain amount of fuel remains in the fuel tank. When the remaining amount of fuel is less than the amount corresponding to the lower limit of the movable range of the float, only the minimum value is displayed regardless of the actual remaining amount of fuel. That is, since the fuel is normally supplied from the fuel tank to the fuel injection valve for a while after the remaining amount of fuel shows the minimum value, it may occur that the vehicle continues to run without refueling.

しかして、燃料の残量が非常に少なくなった際には、燃料タンクから燃料噴射弁までの経路内に空気が混入する等により燃料噴射が正常に行われなくなる燃料系の異常が発生することに伴い、故障等に起因して失火が発生した場合と同様の現象が発生する。すなわち、このような現象が発生した場合に、該現象の原因が上述した空気の混入等の燃料系の異常によるものなのか、それとも故障等に伴うものなのかの判定が困難であるという問題が存在する。   Therefore, when the remaining amount of fuel becomes very small, an abnormality in the fuel system that prevents fuel injection from being normally performed due to air mixed in the path from the fuel tank to the fuel injection valve may occur. As a result, the same phenomenon occurs as when a misfire occurs due to a failure or the like. That is, when such a phenomenon occurs, it is difficult to determine whether the cause of the phenomenon is due to an abnormality in the fuel system such as air mixing described above or a failure or the like. Exists.

特開平１０−１２２０３０号公報JP-A-10-122030

本発明は以上の点に着目し、故障等に起因して失火が発生した場合と同様の現象が発生した際に、その原因の解明を迅速に行うことができるようにすることを目的とする。   The present invention pays attention to the above points, and it is an object of the present invention to be able to quickly elucidate the cause when a phenomenon similar to the case where a misfire occurs due to a failure or the like occurs. .

すなわち本発明に係る燃料残量判定装置は、燃料の残量が所定値以下であることを検出する燃料残量検出要素と、車体の姿勢を検出する車体姿勢検出要素と、前記燃料残量検出要素により燃料の残量が所定値以下であることを検出された際に燃料の噴射量を燃料の残量から減算し、前記車体姿勢検出要素が検出した車体の姿勢に対応する燃料残量閾値を演算し、燃料系の異常を検知すべく前記噴射量を減算した後の燃料の残量が前記燃料残量閾値を下回るか否かの判定を行い、前記燃料の残量が前記燃料残量閾値を下回る場合には燃料計の異常が発生した可能性があることを示す情報を記録する制御装置とを備えていることを特徴とする。 That is, the fuel remaining amount determination device according to the present invention includes a fuel remaining amount detecting element that detects that the remaining amount of fuel is a predetermined value or less, a vehicle body posture detecting element that detects the posture of the vehicle body, and the fuel remaining amount detecting device. A fuel remaining amount threshold value corresponding to the vehicle body posture detected by the vehicle body posture detecting element by subtracting the fuel injection amount from the fuel remaining amount when it is detected by the element that the fuel remaining amount is equal to or less than a predetermined value. calculating a, have rows is determined whether or not lower than the fuel quantity threshold amount of fuel remaining after subtracting the injection amount so as to detect abnormality of the fuel system, the remaining amount of the fuel is the fuel remaining And a control device that records information indicating that there is a possibility that an abnormality of the fuel gauge has occurred .

このようなものであれば、実際の燃料の噴射量に基づき燃料の残量を演算し、演算された燃料の残量と車体の姿勢に対応する閾値とにより燃料系の異常を判定するので、この判定結果に基づき不具合の原因の少なくとも一つが燃料系の異常であるか否かを判断する材料を提供することができる。   If this is the case, the remaining fuel amount is calculated based on the actual fuel injection amount, and the fuel system abnormality is determined based on the calculated remaining fuel amount and the threshold value corresponding to the posture of the vehicle body. Based on this determination result, it is possible to provide a material for determining whether at least one of the causes of the malfunction is an abnormality in the fuel system.

本発明によれば、燃料料の残量と車体の姿勢に対応する閾値とを利用して燃料系の異常が発生したことを検知できるので、故障等に起因して失火が発生した場合と同様の現象が発生した際に、その原因の解明を迅速に行うことができる。   According to the present invention, it is possible to detect the occurrence of an abnormality in the fuel system using the remaining amount of fuel charge and the threshold value corresponding to the posture of the vehicle body, so that it is the same as when a misfire occurs due to a failure or the like When this phenomenon occurs, the cause can be quickly elucidated.

本発明の一実施形態に係る内燃機関を概略的に示す図。1 is a diagram schematically showing an internal combustion engine according to an embodiment of the present invention. 同実施形態に係る燃料タンクを概略的に示す図。The figure which shows schematically the fuel tank which concerns on the same embodiment. 同実施形態に係る制御装置が実行する処理を示すフローチャート。The flowchart which shows the process which the control apparatus which concerns on the same embodiment performs.

以下、本発明の一実施形態を図１及び図２を参照しつつ説明する。   Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

本実施形態に係る車両は、図１に示すように、内燃機関たるエンジン１００と、このエンジン１００に供給する燃料を貯蔵するための燃料タンク１と、車体の姿勢、より具体的には車体の傾斜を検出する車体姿勢検出要素たる加速度センサ２とを備えている。   As shown in FIG. 1, the vehicle according to the present embodiment includes an engine 100 as an internal combustion engine, a fuel tank 1 for storing fuel supplied to the engine 100, a posture of the vehicle body, more specifically, a vehicle body. And an acceleration sensor 2 which is a vehicle body posture detection element for detecting inclination.

前記エンジン１００は、複数の気筒３（図１には、そのうち一つを図示している）と、各気筒３内に燃料を噴射するインジェクタ３１と、各気筒３内に供給された混合気に着火するための点火プラグ３２と、各気筒３に吸気を供給するための吸気経路４と、各気筒３から排気を排出するための排気経路５とを少なくとも備えている。   The engine 100 includes a plurality of cylinders 3 (one of which is shown in FIG. 1), an injector 31 that injects fuel into each cylinder 3, and an air-fuel mixture supplied into each cylinder 3. At least an ignition plug 32 for igniting, an intake path 4 for supplying intake air to each cylinder 3, and an exhaust path 5 for discharging exhaust from each cylinder 3 are provided.

吸気経路４は、外部から空気を取り入れて気筒３の吸気ポートへと導く。吸気経路４上には、吸気ダクト４１、エアクリーナ４２、スロットルバルブ４３、サージタンク４４及び吸気マニホルド４５を、上流からこの順序に配置している。   The intake path 4 takes in air from the outside and guides it to the intake port of the cylinder 3. On the intake path 4, an intake duct 41, an air cleaner 42, a throttle valve 43, a surge tank 44, and an intake manifold 45 are arranged in this order from the upstream side.

排気経路５は、気筒３内で燃料を燃焼させることで発生する燃焼ガス、即ち排気を気筒３の排気ポートから外部へと導く。この排気経路５上には、排気マニホルド５２及び三元触媒５１を配置している。   The exhaust path 5 guides combustion gas generated by burning fuel in the cylinder 3, that is, exhaust gas, from the exhaust port of the cylinder 3 to the outside. An exhaust manifold 52 and a three-way catalyst 51 are disposed on the exhaust path 5.

一方、前記燃料タンク１は、図２に示すように、燃料タンク本体１１と、この燃料タンク本体１１の内部に貯蔵された燃料を燃料噴射弁３１に向けて供給するための燃料ポンプ１２と、同じく前記燃料タンク本体１１の内部に備えられ、燃料の液面に追随して昇降するフロート１３ａ、このフロート１３ａに先端部を接続してなるアーム１３ｂ、このアーク１３ｂの基端を枢支する枢支部１３ｃ、及び前記アーム１３ｂの位置を検知するセンサ本体１３ｄを利用して形成した燃料残量検出要素たる液位センサ１３とを少なくとも備えている。この液位センサ１３のフロート１３ａ及びアーム１３ｂは、図２の想像線に示すような満タンである場合の液位である最高液位から図２の実線に示すような燃料の残量が検知最低限である所定値である場合の液位である最低液位までの間を昇降可能である。そして、この液位センサ１３は、燃料の液位を示す液位信号ｆを制御装置６に出力する。但し、燃料の液位が前記最低液位以下である場合には、実際の液位すなわち燃料の残量に関わらず最低液位を示す液位信号ｆを制御装置６に出力する。   On the other hand, as shown in FIG. 2, the fuel tank 1 includes a fuel tank main body 11, a fuel pump 12 for supplying fuel stored in the fuel tank main body 11 toward the fuel injection valve 31, Similarly, a float 13a that is provided inside the fuel tank body 11 and moves up and down following the fuel level, an arm 13b that has a tip connected to the float 13a, and a pivot that pivotally supports the base end of the arc 13b. It includes at least a support 13c and a liquid level sensor 13 as a fuel remaining amount detecting element formed by using a sensor main body 13d that detects the position of the arm 13b. The float 13a and the arm 13b of the liquid level sensor 13 detect the remaining amount of fuel as shown by the solid line in FIG. 2 from the highest liquid level when the tank is full as shown by the imaginary line in FIG. It is possible to move up and down between the minimum liquid level and the minimum liquid level. The liquid level sensor 13 outputs a liquid level signal f indicating the fuel level to the control device 6. However, when the fuel level is equal to or lower than the minimum liquid level, a liquid level signal f indicating the minimum liquid level is output to the control device 6 regardless of the actual liquid level, that is, the remaining amount of fuel.

前記加速度センサ２は、車体の姿勢、より具体的には車体の傾斜を検出すべく、車体の横方向及び前後方向に対して掛かる加速度を検出するものであり、制御装置６に対して前記加速度を示す加速度信号ｇを出力する。   The acceleration sensor 2 detects the acceleration applied to the lateral direction and the front-rear direction of the vehicle body in order to detect the posture of the vehicle body, more specifically, the inclination of the vehicle body. Is output.

エンジン１００の運転制御を司る制御装置６は、中央演算処理装置、メモリ、入力インタフェース、出力インタフェース等を有したマイクロコンピュータシステムである。ここで、「メモリ」とは、内部メモリ及び外部記憶装置を総称する概念である。   The control device 6 that controls operation of the engine 100 is a microcomputer system having a central processing unit, a memory, an input interface, an output interface, and the like. Here, the “memory” is a concept generically referring to the internal memory and the external storage device.

入力インタフェースには、車速を検出する車速センサ９１から出力される車速信号ａ、エンジン回転数を検出する回転数センサ９２から出力される回転数信号ｂ、アクセルペダルの踏込量を検出するアクセルセンサ９３から出力されるアクセル開度要求信号ｃ、サージタンク２４内の吸気圧を検出する吸気圧センサ９４から出力される吸気圧信号ｄ、サージタンク２４の吸気温を検出する温度センサ９５から出力される吸気温信号ｅ、前記液位センサ１３から出力される液位信号ｆ、前記加速度センサ２から出力される加速度信号ｇ等が入力される。   The input interface includes a vehicle speed signal a output from the vehicle speed sensor 91 that detects the vehicle speed, a rotation speed signal b output from the rotation speed sensor 92 that detects the engine speed, and an accelerator sensor 93 that detects the amount of depression of the accelerator pedal. Is output from a temperature sensor 95 that detects the intake air temperature of the surge tank 24. The accelerator opening request signal c is output from the intake pressure signal d that is output from the intake pressure sensor 94 that detects the intake pressure in the surge tank 24. An intake air temperature signal e, a liquid level signal f output from the liquid level sensor 13, an acceleration signal g output from the acceleration sensor 2, and the like are input.

出力インタフェースからは、インジェクタ１１に対して燃料噴射信号ｍ、点火プラグ１２（のイグニッションコイル）に対して点火信号ｎ等を出力する。   From the output interface, the fuel injection signal m is output to the injector 11 and the ignition signal n is output to the ignition plug 12 (ignition coil thereof).

制御装置６の中央演算処理装置は、予めメモリに格納されているプログラムを解釈、実行して、エンジン１００の運転を制御する。制御装置６は、エンジン１００の運転制御に必要な各種情報ａ、ｂ、ｃ、ｄ、ｅ、ｆ、ｇを入力インタフェースを介して取得し、それらに基づいて吸気量や要求燃料噴射量、点火時期、要求ＥＧＲガス量等を演算する。そして、演算結果に対応した各種制御信号ｍ、ｎを出力インタフェースを介して印加する。   The central processing unit of the control device 6 interprets and executes a program stored in advance in memory to control the operation of the engine 100. The control device 6 acquires various information a, b, c, d, e, f, and g necessary for operation control of the engine 100 via the input interface, and based on them, the intake air amount, the required fuel injection amount, the ignition The time, required EGR gas amount, etc. are calculated. Then, various control signals m and n corresponding to the calculation result are applied through the output interface.

しかして本実施形態では、前記制御装置のメモリに、前記液位センサ１３からの液位信号ｆが示す燃料の残量が所定値以下である際に該制御装置の中央演算処理装置が実行を開始するものであって、燃料の噴射量を燃料の残量から減算し、加速度センサ２が検出した車体の姿勢に対応する燃料残量閾値を決定し、燃料系への空気の混入等の燃料系の異常が発生しているか否かを判定すべく前記噴射量を減算した後の燃料の残量が決定された燃料残量閾値よりを下回るか否かの判定を行う制御を実行するための残量検知プログラムを内蔵している。 Therefore, in this embodiment, when the remaining amount of fuel indicated by the liquid level signal f from the liquid level sensor 13 is less than a predetermined value in the memory of the control apparatus, the central processing unit of the control apparatus executes it. The fuel injection amount is subtracted from the fuel remaining amount, a fuel remaining amount threshold value corresponding to the posture of the vehicle body detected by the acceleration sensor 2 is determined, and fuel such as air mixed into the fuel system is determined. For performing control for determining whether or not the remaining amount of fuel after subtracting the injection amount is less than a determined fuel remaining amount threshold value to determine whether or not a system abnormality has occurred Built-in remaining amount detection program.

以下、前記残量検知プログラムに基づき制御装置６が行う処理の手順をフローチャートである図３を参照しつつ以下に述べる。   Hereinafter, the procedure of processing performed by the control device 6 based on the remaining amount detection program will be described below with reference to FIG. 3 which is a flowchart.

まず、液位センサ１３からの液位信号ｆが示す燃料の残量が所定値以下であるか否かを判定し（Ｓ１）、燃料の残量が所定値以下である場合には、燃料の噴射量を決定し（Ｓ２）、決定した噴射量を燃料の残量から減算する（Ｓ３）。さらに、前記加速度センサ２から加速度信号ｇに対応する加速度すなわち車体の傾きを取得してこの車体の傾きをパラメータとして燃料残量閾値を決定し（Ｓ４）、この燃料残量閾値より燃料の残量が下回るか否かを判定し（Ｓ５）、前記燃料残量閾値より燃料の残量が下回る場合には燃料に空気が混入する等の燃料系の異常が発生した可能性があることを示す情報である空気混入情報を記憶装置の所定領域に記録する（Ｓ６）。そして、燃料カット制御を行い（Ｓ７）、空燃比フィードバック制御の際の燃料噴射量の学習を中止する（Ｓ８）。一方、前記燃料残量閾値より燃料の残量が上回る場合には、前記ステップＳ２に戻る。なお、前記ステップＳ５の判定は、実際には燃料残量閾値判定マップを参照して行う。この燃料残量閾値判定マップは、燃料の残量及び前記加速度信号ｇに対応する車体の傾斜をパラメータとし、代表的な燃料の残量ごとに、各車体の代表的な傾斜において燃料に空気が混入するおそれがあるか否かを示すフラグ、すなわち燃料に空気が混入するおそれがあることを示す「１」及び燃料に空気が混入するおそれがないことを示す「０」の２値のいずれかをとるフラグをメモリの所定領域に記憶している。そして、実際の判定はステップＳ３で演算された燃料の残量に最も近い代表値、及び前記加速度信号ｇに対応する車体の傾斜に最も近い代表値をパラメータとして行う。   First, it is determined whether or not the remaining amount of fuel indicated by the liquid level signal f from the liquid level sensor 13 is equal to or less than a predetermined value (S1). The injection amount is determined (S2), and the determined injection amount is subtracted from the remaining amount of fuel (S3). Further, the acceleration corresponding to the acceleration signal g, that is, the inclination of the vehicle body is obtained from the acceleration sensor 2, and the fuel remaining amount threshold value is determined using this vehicle body inclination as a parameter (S4). (S5), and information indicating that there is a possibility that an abnormality in the fuel system has occurred, such as when air is mixed into the fuel when the remaining amount of fuel is lower than the fuel remaining amount threshold value. Is recorded in a predetermined area of the storage device (S6). Then, fuel cut control is performed (S7), and learning of the fuel injection amount at the time of air-fuel ratio feedback control is stopped (S8). On the other hand, when the remaining amount of fuel exceeds the remaining fuel threshold, the process returns to step S2. Note that the determination in step S5 is actually performed with reference to the remaining fuel threshold determination map. This fuel remaining amount threshold determination map uses the remaining amount of fuel and the inclination of the vehicle body corresponding to the acceleration signal g as parameters, and for each representative remaining amount of fuel, air flows into the fuel at a representative inclination of each vehicle body. One of a flag indicating whether or not there is a possibility of mixing, that is, “1” indicating that air may be mixed into the fuel and “0” indicating that there is no possibility that air is mixed into the fuel Is stored in a predetermined area of the memory. The actual determination is performed using the representative value closest to the remaining fuel amount calculated in step S3 and the representative value closest to the vehicle body inclination corresponding to the acceleration signal g as parameters.

ここで、上述したステップＳ５における処理により制御装置６のメモリの所定領域に記録された前記空気混入情報は、車両の外部に備えられた情報処理装置に送信されることにより、該情報処理装置によって可視化表示される。すなわち、エンジンの失火又はそれに類似する不具合が発生した場合には、前記情報処理装置を車両の制御装置６に接続することにより制御装置６のメモリ内に記憶した各種情報が制御装置６から前記情報処理装置に送信され、前記各種情報中に空気混入情報が含まれる場合、この空気混入情報が前記情報処理装置の表示装置に可視化表示される。   Here, the air mixing information recorded in the predetermined area of the memory of the control device 6 by the processing in step S5 described above is transmitted to the information processing device provided outside the vehicle, thereby the information processing device. Visualized. That is, when an engine misfire or a problem similar thereto occurs, various information stored in the memory of the control device 6 is transferred from the control device 6 by connecting the information processing device to the control device 6 of the vehicle. When air mixing information is included in the various types of information transmitted to the processing device, the air mixing information is visualized and displayed on the display device of the information processing apparatus.

すなわち本実施形態では、液位センサ１３と、加速度センサ２と、制御装置６とが協働して請求項中の燃料残量判定装置として機能する。   That is, in this embodiment, the liquid level sensor 13, the acceleration sensor 2, and the control device 6 function as a fuel remaining amount determination device in the claims.

以上に述べたように、本実施形態によれば、液位センサ１３からの液位信号が示す燃料の残量が所定値以下となった後、制御装置６が、実際の燃料の噴射量を燃料の残量から減算し、前記噴射量を減算した後の燃料の残量と車体の姿勢に対応する閾値とにより燃料系への空気の混入等の燃料の残量が少なくなり燃料タンク１内の燃料の液面が燃料ポンプ１２の燃料取入口より低くなることに伴う燃料系の不具合の発生の有無を判定し、判定の結果燃料の残量が閾値を下回った場合にはその旨記録を行うようにしているので、この記録に基づき不具合の原因の少なくとも一つが燃料系への空気の混入等の燃料系の不具合の発生の有無であるか否かを判断する材料を提供することができる。従って、故障等に起因して失火が発生した場合と同様の現象が発生した際に、その原因の解明を迅速に行うことができる。 As described above, according to the present embodiment, after the remaining amount of fuel indicated by the liquid level signal from the liquid level sensor 13 becomes equal to or less than the predetermined value, the control device 6 reduces the actual fuel injection amount . By subtracting from the remaining amount of fuel, the remaining amount of fuel after subtracting the injection amount and the threshold value corresponding to the posture of the vehicle body, the remaining amount of fuel such as air mixing into the fuel system is reduced, and the fuel tank 1 It is determined whether or not a fuel system failure has occurred as the fuel level of the fuel becomes lower than the fuel intake port of the fuel pump 12. If the remaining fuel level falls below the threshold as a result of the determination, a record to that effect is recorded. Therefore, based on this record, it is possible to provide a material for determining whether or not at least one of the causes of the malfunction is the occurrence of a malfunction of the fuel system such as the mixing of air into the fuel system. . Therefore, when a phenomenon similar to the case where a misfire occurs due to a failure or the like, the cause can be quickly elucidated.

また、本実施形態では、前記燃料残量閾値より燃料の残量が下回った場合には燃料カットを行うので、燃料に空気が混入し実際の燃料噴射量が燃料噴射時間から推定されるものよりも小さくなりオーバーリーン状態で燃焼が行われることによる触媒の溶損を防ぐことができる。   Further, in the present embodiment, since the fuel cut is performed when the remaining amount of fuel falls below the fuel remaining amount threshold, air is mixed into the fuel and the actual fuel injection amount is estimated from the fuel injection time. And the catalyst can be prevented from being damaged due to combustion in an over-lean state.

さらに、本実施形態では、前記燃料残量閾値より燃料の残量が下回った場合には空燃比フィードバック制御の際の燃料噴射量の学習を中止するので、燃料の残量が少なくなった際に学習を行う際に発生する、燃料充填後に燃料噴射量がこの学習値を反映して実際の空燃比が理論空燃比よりもリッチ側になってしまう誤学習を防ぐことができる。   Further, in the present embodiment, when the fuel remaining amount falls below the fuel remaining amount threshold value, learning of the fuel injection amount at the time of air-fuel ratio feedback control is stopped, so when the fuel remaining amount decreases. It is possible to prevent erroneous learning that occurs when learning is performed and the actual air-fuel ratio becomes richer than the stoichiometric air-fuel ratio because the fuel injection amount reflects this learned value after fuel filling.

なお、本発明は以上に述べた実施形態に限らない。   The present invention is not limited to the embodiment described above.

例えば、車体姿勢検出要素として、上述した実施形態に挙げた加速度センサに代えて、車体の傾斜そのものを検知する傾斜センサを用いるようにしてもよい。   For example, instead of the acceleration sensor described in the above-described embodiment, a tilt sensor that detects the tilt of the vehicle body may be used as the vehicle body posture detection element.

また、上述した実施形態では、前記燃料残量閾値より燃料の残量が下回った場合には触媒の溶損を防ぐべく燃料カットを行うようにしているが、燃料カットは行わず燃焼温度を低下させる他の処置を行うようにしてもよい。   In the above-described embodiment, when the remaining amount of fuel falls below the remaining fuel threshold, the fuel cut is performed to prevent the catalyst from being melted. However, the fuel temperature is not cut and the combustion temperature is lowered. Other treatments may be performed.

さらに、上述した実施形態では前記燃料残量閾値より燃料の残量が下回った場合には空燃比フィードバック制御に伴う燃料噴射量の学習を中止し、誤学習を防ぐようにしているが、前記燃料残量閾値より燃料の残量が下回った場合に通常の空燃比フィードバック制御に用いる記憶装置の領域とは別の領域に燃料噴射量の学習値を記憶するようにし、燃料充填後には通常の空燃比フィードバック制御に用いる記憶装置の領域に燃料噴射量の学習値を記憶する制御を行うようにしてもよい。   Further, in the above-described embodiment, when the remaining amount of fuel falls below the fuel remaining amount threshold, learning of the fuel injection amount accompanying the air-fuel ratio feedback control is stopped to prevent erroneous learning. When the remaining amount of fuel falls below the remaining amount threshold, the learning value of the fuel injection amount is stored in a region different from the region of the storage device used for normal air-fuel ratio feedback control, and after fuel filling, the normal empty You may make it perform control which memorize | stores the learning value of fuel injection quantity in the area | region of the memory | storage device used for fuel ratio feedback control.

その他、本発明の趣旨を損ねない範囲で種々に変形してよい。   In addition, various modifications may be made without departing from the spirit of the present invention.

１３…液位センサ（燃料残量検出要素）
２…加速度センサ（車体姿勢検出要素）
６…制御装置 13. Liquid level sensor (fuel remaining amount detection element)
2. Acceleration sensor (body posture detection element)
6. Control device

Claims (1)

燃料の残量が所定値以下であることを検出する燃料残量検出要素と、車体の姿勢を検出する車体姿勢検出要素と、前記燃料残量検出要素により燃料の残量が所定値以下であることを検出された際に燃料の噴射量を燃料の残量から減算し、前記車体姿勢検出要素が検出した車体の姿勢に対応する燃料残量閾値を演算し、燃料系の異常を検知すべく前記噴射量を減算した後の燃料の残量が前記燃料残量閾値を下回るか否かの判定を行い、前記燃料の残量が前記燃料残量閾値を下回る場合には燃料計の異常が発生した可能性があることを示す情報を記録する制御装置とを備えていることを特徴とする燃料残量判定装置。 A fuel remaining amount detecting element for detecting that the remaining amount of fuel is less than or equal to a predetermined value, a vehicle body posture detecting element for detecting the posture of the vehicle body, and the fuel remaining amount being less than or equal to a predetermined value by the fuel remaining amount detecting element In order to detect an abnormality in the fuel system, the fuel injection amount is subtracted from the remaining amount of fuel, and a remaining fuel threshold value corresponding to the vehicle body posture detected by the vehicle body posture detecting element is calculated. There rows is determined whether or not lower than the fuel quantity threshold amount of fuel remaining after subtracting the injection amount, when the remaining amount of the fuel is below the fuel remaining amount threshold abnormalities fuel gauge A fuel remaining amount determination device comprising: a control device that records information indicating that there is a possibility of occurrence .
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