JP2006022710A - Control device for idling stop vehicle - Google Patents

Control device for idling stop vehicle Download PDF

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JP2006022710A
JP2006022710A JP2004201366A JP2004201366A JP2006022710A JP 2006022710 A JP2006022710 A JP 2006022710A JP 2004201366 A JP2004201366 A JP 2004201366A JP 2004201366 A JP2004201366 A JP 2004201366A JP 2006022710 A JP2006022710 A JP 2006022710A
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power generation
current
integrated value
control
engine
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Kazuteru Kurose
一輝 黒瀬
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Mitsubishi Motors Corp
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Mitsubishi Motors Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
    • F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2200/00—Parameters used for control of starting apparatus
    • F02N2200/06—Parameters used for control of starting apparatus said parameters being related to the power supply or driving circuits for the starter
    • F02N2200/062—Battery current
    • 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
    • Y02T10/40—Engine management systems

Abstract

<P>PROBLEM TO BE SOLVED: To further improve fuel economy by ingeniously combining idle stop prohibition control and power generation suppression control, in an idle stop vehicle. <P>SOLUTION: This control device for the idle stop vehicle is provided with a power generator 2 driven by an engine 1 and to supply power to a battery 3 and an electrical load 4, and automatically stops the engine 1 when a predetermined engine automatic stop condition is achieved. The control device for the idle stop vehicle is provided with electric current integrated value detection means 5, 6, 7 for detecting a charge and discharge current integrated value ΣI of the battery 3; a power generation suppression control means 5 for suppressing power generation operation of the power generator 2 in a predetermined condition and for prohibiting suppression of power generation operation when the integrated value ΣI detected by the electric current integrated value detection means 5, 6, 7 is above a first predetermined value 0 and below a third predetermined value αAh in a discharge side; and an automatic stop control means 5 for prohibiting automatic stop of the engine 1, when the integrated value ΣI detected by the electric current integrated value detection means 5, 6, 7 is above a second predetermined value (discharge amount, for example a value corresponding to βAh) in the discharge side from the first predetermined value, even if the engine automatic stop condition is achieved. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、アイドリングストップ車両の制御装置に関する。詳しくは、アイドリングストップ禁止制御と発電抑制制御とを巧妙に組み合わせたものである。   The present invention relates to a control device for an idling stop vehicle. Specifically, it is a skillful combination of idling stop prohibition control and power generation suppression control.

信号停止時などにエンジンを自動的に停止するアイドリングストップ車においては、バッテリの上がりを防ぐため、バッテリの充放電をモニターし、放電量が閾値を超えた場合に、アイドリングストップを禁止してバッテリに充電するアイドリングストップ禁止制御を採用している（特許文献１）。   In an idling stop vehicle that automatically stops the engine when the signal is stopped, etc., to prevent the battery from rising, the battery charge / discharge is monitored, and when the discharge amount exceeds the threshold, the idling stop is prohibited and the battery is disabled. The idling stop prohibition control for charging the battery is employed (Patent Document 1).

更に燃費を向上させるために、アイドリングストップ車において、加速時に発電機（オルタネータ）による発電を抑制する発電抑制制御を適用する工夫もなされている（特許文献２）。
特開２００１−１７３４８０ 特開２００１−１７３４８１ In order to further improve fuel efficiency, a device for applying power generation suppression control that suppresses power generation by a generator (alternator) during acceleration in an idling stop vehicle has also been made (Patent Document 2).
JP 2001-173480 A JP 2001-173481 A

しかし、常にアイドリングストップ禁止制御と発電抑制制御を併用すると、アイドリングストップ禁止に入る確率が高くなり、それ故に燃費が向上しない可能性がある。
ここで、アイドリングストップ禁止制御における閾値としての放電量は、実走行での放電量分布に対しかなり余裕があることが、本発明者による試験結果により明らかとなった。 However, if the idling stop prohibition control and the power generation suppression control are always used in combination, the probability of entering the idling stop prohibition increases, and therefore the fuel efficiency may not be improved.
Here, it became clear from the test result by the present inventor that the discharge amount as the threshold value in the idling stop prohibition control has a considerable margin with respect to the discharge amount distribution in actual traveling.

例えば、図４に示すように、本発明者による試験結果では、アイドリングストップによる放電量分布は、アイドルストップ禁止制御の閾値よりもはるかに低い放電量で最大となっている。
図４の下段は放電量に対するアイドリングストップの頻度（Frequency）の関係を示すグラフであり、図４の上段は放電量に対するアイドリングストップの累計（Accumulation）との関係を示すグラフである。 For example, as shown in FIG. 4, in the test result by the present inventor, the discharge amount distribution due to idling stop is maximized at a discharge amount far lower than the threshold value of the idle stop prohibition control.
The lower part of FIG. 4 is a graph showing the relationship of the idling stop frequency to the discharge amount, and the upper part of FIG. 4 is a graph showing the relation of the idling stop accumulation (Accumulation) to the discharge amount.

図４に示すように、アイドリングストップ禁止制御における閾値としての放電量と、アイドリングストップの累計８０%の生じる放電量との間には、かなりの余裕Ｍがある。   As shown in FIG. 4, there is a considerable margin M between the amount of discharge as a threshold value in the idling stop prohibition control and the amount of discharge generated by a total of 80% of idling stops.

上記課題を解決する本発明の請求項１に係るアイドルストップ車両の制御装置は、エンジンにより駆動されバッテリ及び電気負荷に給電する発電機を備え、所定のエンジン自動停止条件が成立すると上記エンジンを自動的に停止させるアイドルストップ車両の制御装置において、上記バッテリの充放電電流積算値を検出する電流積算値検出手段と、所定の条件で上記発電機の発電作動を抑制させると共に、上記電流積算値検出手段により検出された上記積算値が放電側に第１所定値以上であるときは上記発電作動の抑制を禁止する発電抑制制御手段と、上記電流積算値検出手段により検出された上記積算値が上記第１所定値より放電側の第２所定値以上であるときは上記エンジン自動停止条件が成立しても上記エンジンの自動停止を禁止する自動停止制御手段とを備えたことを特徴とする。   The control apparatus for an idle stop vehicle according to claim 1 of the present invention that solves the above-described problem includes a generator that is driven by an engine and supplies power to a battery and an electric load, and automatically activates the engine when a predetermined engine automatic stop condition is satisfied. In an idling stop vehicle control device that stops automatically, current integrated value detection means for detecting the charge / discharge current integrated value of the battery, and the power generation operation of the generator under a predetermined condition, and the current integrated value detection When the integrated value detected by the means is greater than or equal to the first predetermined value on the discharge side, the power generation suppression control means for prohibiting suppression of the power generation operation, and the integrated value detected by the current integrated value detection means When it is equal to or greater than the second predetermined value on the discharge side from the first predetermined value, the automatic engine stop is prohibited even if the engine automatic stop condition is satisfied. Characterized in that a dynamic stop control means.

上記課題を解決する本発明の請求項２に係るアイドルストップ車両の制御装置は、請求項１において、前記電流積算値検出手段は、電気負荷の消費電流を検出する消費電流検出手段と、上記発電機により発電される発電電流を検出する発電電流検出手段と、上記消費電流検出手段で検出される消費電流と上記発電電流検出手段で検出される発電電流との差を積算する積算手段とから構成されることを特徴とする。   The control apparatus for an idle stop vehicle according to claim 2 of the present invention that solves the above-described problem is the control apparatus according to claim 1, wherein the current integrated value detection means includes consumption current detection means for detecting consumption current of an electric load, and the power generation A power generation current detection means for detecting a power generation current generated by the machine, and an integration means for integrating the difference between the current consumption detected by the current consumption detection means and the power generation current detected by the power generation current detection means It is characterized by being.

上記課題を解決する本発明の請求項３に係るアイドルストップ車両の制御装置は、請求項１又は２において、前記発電抑制制御手段は、上記所定条件として、減速時以外の場合に発電作動を抑制させることを特徴とする。   The control apparatus for an idle stop vehicle according to claim 3 of the present invention that solves the above-described problems is the control device according to claim 1 or 2, wherein the power generation suppression control means suppresses power generation operation when the vehicle is not decelerated as the predetermined condition. It is characterized by making it.

上記課題を解決する本発明の請求項４に係るアイドルストップ車両の制御装置は、請求項１又は２において、前記発電抑制制御手段は、上記所定条件として、上記電気負荷による消費電流と略同等の発電電流となるよう上記発電機を制御することを特徴とする。   A control device for an idle stop vehicle according to a fourth aspect of the present invention for solving the above-described problems is the control device for the idle stop vehicle according to the first or second aspect, wherein the power generation suppression control means is substantially equivalent to a current consumption by the electric load as the predetermined condition. The generator is controlled so as to have a generated current.

上記課題を解決する本発明の請求項５に係るアイドルストップ車両の制御装置は、請求項１又は２において、上記発電抑制制御手段は、発電作動の抑制が一旦禁止となると、上記積算値が上記第１所定値よりも充電側の第３所定値になるまで、発電作動の抑制の禁止を継続することを特徴とする。   The control apparatus for an idle stop vehicle according to claim 5 of the present invention that solves the above-described problem is the control device according to claim 1 or 2, wherein the power generation suppression control means is configured such that, once suppression of power generation operation is prohibited, the integrated value is The suppression of the power generation operation is continued until the third predetermined value on the charging side from the first predetermined value is reached.

本発明の請求項１に係るアイドルストップ車両の制御装置においては、所定の条件で発電機の発電作動が抑制されるため、該抑制時にはエンジンの発電機駆動負荷が軽減され燃費を向上できるし、充放電電流積算値が放電側に第１所定値以上である時は発電作動の抑制は禁止されるのでバッテリの放電が進むことなく、効率良く充電を優先させることができバッテリの過放電を適切に防止できる。
しかも、エンジンの自動停止を禁止する閾値となる第２所定値は第１所定値より放電側に設定されているため、発電抑制の禁止により積算値が第２所定値に達し難くすることができる。
このため、エンジンの自動停止機能に大きな影響を与えることなく発電抑制を行うことができ、総合的に燃費を向上できる。 In the control device for the idle stop vehicle according to claim 1 of the present invention, since the power generation operation of the generator is suppressed under a predetermined condition, at the time of the suppression, the generator driving load of the engine can be reduced and fuel consumption can be improved, When the integrated charge / discharge current value is greater than or equal to the first predetermined value on the discharge side, the suppression of power generation operation is prohibited. Can be prevented.
In addition, since the second predetermined value serving as a threshold value for prohibiting the automatic engine stop is set on the discharge side from the first predetermined value, the integrated value can hardly reach the second predetermined value by prohibiting the generation of power. .
For this reason, power generation can be suppressed without greatly affecting the automatic stop function of the engine, and the fuel efficiency can be improved comprehensively.

本発明の請求項２に係るアイドルストップ車両の制御装置においては、請求項１と同様な効果を奏するほか、請求項１における電流積算値検出手段をより具体的な手段で実現できるという効果を奏する。   The control device for the idle stop vehicle according to claim 2 of the present invention has the same effect as that of claim 1, and also has the effect that the current integrated value detection means of claim 1 can be realized by more specific means. .

本発明の請求項３に係るアイドルストップ車両の制御装置においては、請求項１又は２と同様な効果を奏するほか、更に、減速時の回生エネルギを有効活用した発電を行いながらと燃費も向上できるという効果を奏する。   In the control apparatus for the idle stop vehicle according to claim 3 of the present invention, the same effect as that of claim 1 or 2 can be obtained, and further, fuel efficiency can be improved while performing power generation utilizing the regenerative energy during deceleration. There is an effect.

本発明の請求項４に係るアイドルストップ車両の制御装置においては、請求項１又は２と同様な効果を奏するほか、更に、必要量だけ発電するのでバッテリの負担を最小限にしながら燃費を向上できるという効果を奏する。   In the control apparatus for the idle stop vehicle according to the fourth aspect of the present invention, the same effect as in the first or second aspect can be obtained, and furthermore, since the required amount of power is generated, the fuel consumption can be improved while minimizing the burden on the battery. There is an effect.

本発明の請求項５に係るアイドルストップ車両の制御装置においては、請求項１又は２と同様な効果を奏するほか、更に、バッテリの充電が優先されてバッテリを効率良く回復させることができるし制御ハンチングも防止できるという効果を奏する。   In the control apparatus for the idle stop vehicle according to the fifth aspect of the present invention, the same effect as in the first or second aspect can be obtained, and further, the battery can be efficiently recovered by giving priority to the charging of the battery. There is an effect that hunting can also be prevented.

本発明のアイドリングストップ車両の制御装置は、例えば、図１に示すようにＥＣＵ５等でハードウェア的に実現しても良いが、図２に示すフローチャートでソフトウェア的に実現しても良い。   The control device for an idling stop vehicle of the present invention may be realized by hardware such as the ECU 5 as shown in FIG. 1, but may be realized by software according to the flowchart shown in FIG.

例えば、本発明の電流積算値検出手段、発電抑制制御手段及び自動停止制御手段は図１に示すＥＣＵ５により具体的に実現することができ、ＥＣＵ５はオルタネータ２の発電電流Ｉgを検出する電流センサ６、電気負荷４の消費電流Ｉcを検出する電流センサ７をそれぞれ消費電流検出手段、放電電流検出手段とし、消費電流Ｉcと発電電流Ｉgとの差ΔＩ（＝Ｉc−Ｉg）を積算して、充放電電流積算値ΣＩ（＝ΣＩ＋ΔＩ）を求める積算手段を含むものである。 For example, the current integrated value detecting means of the present invention, the power generation suppression control unit and the automatic stop control means can be realized specifically by ECU5 shown in FIG. 1, the current sensor ECU5 is for detecting the generated current I g of the alternator 2 6. The current sensors 7 for detecting the consumption current I c of the electric load 4 are used as consumption current detection means and discharge current detection means, respectively, and the difference ΔI (= I c −I g ) between the consumption current I c and the generated current I g And integrating means for obtaining a charge / discharge current integrated value ΣI (= ΣI + ΔI).

また、ＥＣＵ５である発電抑制制御手段は、充放電電流積算値が第１所定値と第３所定値の間において発電抑制制御を行い、更に、ＥＣＵ５である自動停止制御手段は、第１所定値より放電側の第２所定値以上の時にはアイドルストップ禁止制御を行うものである。   The power generation suppression control means that is the ECU 5 performs power generation suppression control when the integrated charge / discharge current value is between the first predetermined value and the third predetermined value, and the automatic stop control means that is the ECU 5 further includes the first predetermined value. When the value is greater than or equal to the second predetermined value on the discharge side, idle stop prohibition control is performed.

具体的には、図４に示すように、アイドリング禁止制御における閾値としての放電量と、アイドリングストップの累計８０%の生じる放電量との間の差Ｍを使って発電抑制制御を行うものである。
この場合には、上記Ｍの範囲内で発電抑制制御を行い、発電抑制制御の放電分に上乗せしてアイドリングストップ禁止制御を行う。ただし、アイドリングストップ禁止となる放電積算値は、従来と同じが望ましい。 Specifically, as shown in FIG. 4, power generation suppression control is performed using a difference M between a discharge amount as a threshold value in idling inhibition control and a discharge amount generated by a total of 80% of idling stop. .
In this case, the power generation suppression control is performed within the range of M, and the idling stop prohibition control is performed by adding to the discharge of the power generation suppression control. However, the discharge integrated value for which idling stop is prohibited is preferably the same as the conventional one.

本発明の一実施例に係るアイドルストップ車両の制御装置について、図１及び図２を参照して説明する。
図１は本実施例のアイドルストップ車両の概略構成図、図２は制御過程を示すフローチャートである。 An idle stop vehicle control apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.
FIG. 1 is a schematic configuration diagram of an idle stop vehicle of this embodiment, and FIG. 2 is a flowchart showing a control process.

図１に示すように、エンジン１には発電機（オルタネータ）２が設けられ、オルタネータ２はエンジン１により駆動され、バッテリ３及び電気負荷４に給電を行い、ＥＣＵ５の指令に基づいて発電率が制御される。
充放電可能なバッテリ３にはオルタネータ２からの電力が供給されて充電されると共に、電気負荷４にはオルタネータ２及びバッテリ３から適宜電力が供給される。 As shown in FIG. 1, the engine 1 is provided with a generator (alternator) 2. The alternator 2 is driven by the engine 1 to supply power to the battery 3 and the electric load 4, and the power generation rate is based on a command from the ECU 5. Be controlled.
The chargeable / dischargeable battery 3 is supplied with electric power from the alternator 2 and charged, and the electric load 4 is appropriately supplied with electric power from the alternator 2 and the battery 3.

オルタネータ２からバッテリ３までの経路には電流センサ６が設けられ、電流センサ６によりオルタネータ２の発電電流Ｉgが検出される。また、電流センサ６の電気負荷４側におけるバッテリ３から電気負荷４までの経路には電流センサ７が設けられ、電流センサ７により電気負荷４の消費電流Ｉcが検出される。
また、バッテリ３には電圧センサ８が設けられ、電圧センサ８によりバッテリ３の電圧が検出される。そして、バッテリ３から給電されるスタータモータ１１によりエンジン１が始動されるようになっている。 Current sensor 6 is provided in the path from the alternator 2 to the battery 3, the power generation current I g of the alternator 2 is detected by the current sensor 6. Further, in the path from the battery 3 in the electric load 4 side of the current sensor 6 to the electric load 4 the current sensor 7 is provided, consumption current I c of the electric load 4 by the current sensor 7 is detected.
Further, the battery 3 is provided with a voltage sensor 8, and the voltage of the battery 3 is detected by the voltage sensor 8. The engine 1 is started by a starter motor 11 fed from the battery 3.

ＥＣＵ５は、図２（ａ）（ｂ）に示すフローチャートに示すように、電流センサ６で検出されたオルタネータ２の発電電流Ｉg、電流センサ７で検出された電気負荷４の消費電流Ｉcに基づいて、アイドルストップ制御と発電抑制制御を組み合わせて、最適な発電量になるように最小発電電力のＤＵＴＹ０％から最大発電電力のＤＵＴＹ１００％の間でオルタネータ２を制御する。 As shown in the flowcharts shown in FIGS. 2A and 2B, the ECU 5 determines the generated current I g of the alternator 2 detected by the current sensor 6 and the consumed current I c of the electric load 4 detected by the current sensor 7. Based on this, the alternator 2 is controlled between DUTY 0% of the minimum generated power and DUTY 100% of the maximum generated power so as to obtain an optimal power generation amount by combining the idle stop control and the power generation suppression control.

先ず、アイドリングストップ制御が許可か否か判定し（ステップＳ１）、アイドリングストップ制御が不許可の場合、つまり、アイドリングストップ禁止制御の場合には、自動的に発電抑制制御も不許可とする。
アイドリングストップ制御とは、所定のエンジン自動停止条件が成立するとエンジン１を自動的に停止する制御を言い、アイドリングストップ禁止制御とは、所定のエンジン自動停止条件が成立する場合でも、アイドリングストップ禁止条件が成立すると、エンジン１の自動停止を禁止する制御を言う。そして、この場合のアイドルストップ禁止条件は、充放電電流積算値がβＡｈ以上であるという設定になっている。 First, it is determined whether or not the idling stop control is permitted (step S1). When the idling stop control is not permitted, that is, when the idling stop prohibiting control is performed, the power generation suppression control is automatically permitted.
The idling stop control refers to a control that automatically stops the engine 1 when a predetermined engine automatic stop condition is satisfied. The idling stop prohibition control refers to an idling stop prohibition condition even when a predetermined engine automatic stop condition is satisfied. When is established, it refers to control for prohibiting the automatic stop of the engine 1. In this case, the idle stop prohibition condition is set such that the integrated charge / discharge current value is equal to or greater than βAh.

次に、アイドリングストップ制御が許可される状態のときには、発電抑制制御が許可（発電抑制制御許可＝１）か否か判定する（ステップＳ２）。
発電抑制制御とは、所定の条件でオルタネータ２の発電作動を抑制する制御を言う。 Next, when idling stop control is permitted, it is determined whether or not power generation suppression control is permitted (power generation suppression control permission = 1) (step S2).
The power generation suppression control is control that suppresses the power generation operation of the alternator 2 under a predetermined condition.

引き続き、発電抑制制御が許可されるときには、減速時（減速＝１）か否か判定し（ステップＳ３）、減速時には目標ＤＵＴＹ１００％で回生発電を行う（ステップＳ４）。
減速時の定義は、図２（ｂ）に示す通りである。即ち、車速Ｖs＞０ｋｍ／ｈｒであり（ステップＴ１）、かつ、アクセルペダルを全閉状態に戻している（ステップＴ２）場合である。 Subsequently, when the power generation suppression control is permitted, it is determined whether or not the vehicle is decelerating (deceleration = 1) (step S3), and regenerative power generation is performed at the target DUTY 100% during deceleration (step S4).
The definition at the time of deceleration is as shown in FIG. That is, this is a case where the vehicle speed V s > 0 km / hr (step T1) and the accelerator pedal is returned to the fully closed state (step T2).

減速時以外では、発電電流Ｉg＝消費電流Ｉcとなるように目標ＤＵＴＹを±１％変化させる（ステップＳ６，８）。ここでは±１％としたが、１００%以下の任意の数値でも良い。
但し、発電電流Ｉgと消費電流Ｉcとの差が小さいとき、即ち、Ｉc−Ｉg＜ｋ1が成り立ち（ステップＳ５）、Ｉc−Ｉg＞ｋ2が成り立つとき（ステップＳ７）は不感帯として、目標ＤＵＴＹを操作しない（ステップＳ９）。 Except at the time of deceleration, the target DUTY is changed by ± 1% so that the generated current I g = the consumed current I c (steps S6 and S8). Here, the value is ± 1%, but any value of 100% or less may be used.
However, when the difference between the generated current I g and the consumed current I c is small, that is, when I c −I g <k 1 holds (step S5), and when I c −I g > k 2 holds (step S7). Does not operate the target DUTY as a dead zone (step S9).

更に、放電電流Ｉcから発電電流Ｉgを差し引いた充放電電流ΔＩ（＝Ｉc−Ｉg）を求め（ステップＳ１０）、更に、充放電電流ΔＩを積算した充放電電流積算値ΣＩ（＝ΣＩ＋ΔＩ）を求める（ステップＳ１１）。
但し、
Ｉg：発電電流
Ｉc：放電電流（消費電流）
ΔＩ＝放電電流−発電電流
ΣＩ：電流積算値（＋が放電、−が充電）
である。 Further, a charge / discharge current ΔI (= I c −I g ) obtained by subtracting the generated current I g from the discharge current I c is obtained (step S10), and the charge / discharge current integrated value ΣI (= (ΣI + ΔI) is obtained (step S11).
However,
I g : Generated current I c : Discharge current (current consumption)
ΔI = discharge current−generated current ΣI: current integrated value (+ is discharged, − is charged)
It is.

そして、充放電電流積算値ΣＩ（＋が放電、−が充電）が、ΣＩ＞αＡｈを満たすか否か判定し（ステップＳ１２）、ΣＩ＞αＡｈ（α＜β）を満たすときは、バッテリ３の放電がかなり進みすぎているので充電を優先すべく、発電抑制制御を取り消し、（発電抑制制御許可＝０）、発電抑制制御を不許可とする（ステップＳ１３）。
この後、発電抑制制御が不許可とステップＳ２で判定されると、目標ＤＵＴＹ１００％で発電制御を行うことになる（ステップＳ１６）。 Then, it is determined whether or not the charge / discharge current integrated value ΣI (+ is discharged and − is charged) satisfies ΣI> αAh (step S12), and when ΣI> αAh (α <β) is satisfied, Since the discharge has progressed too much, the power generation suppression control is canceled (power generation suppression control permission = 0) and power generation suppression control is not permitted (step S13) in order to prioritize charging.
Thereafter, when it is determined in step S2 that the power generation suppression control is not permitted, the power generation control is performed with the target DUTY 100% (step S16).

また、ΣＩ＞αＡｈを満たさないと判定されたときは、充放電電流積算値ΣＩ≦０を満たすか否か判定し（ステップＳ１４）、充放電電流積算値ΣＩが０より小さいときには、発電抑制制御を許可（発電抑制制御許可＝１、ステップＳ１５）し、充放電電流積算値ΣＩが０以上、α以下のときには（０≦ΣＩ≦α）、発電抑制制御の許可・不許可は変更しない。
結局、０＜ΣＩ≦αＡｈのときには、既に発電抑制制御が許可されていれば、バッテリ３の放電は進みすぎていないから、オルタネータ２の駆動負荷を軽減すべく発電抑制制御許可（発電抑制制御許可＝１）を継続し、発電抑制制御が不許可になっていれば、ΣＩ≦αＡｈになるまで不許可が継続することになる。
発電抑制制御許可のときには、上述したように、最適な発電量になるように最小発電電力のＤＵＴＹ０％から最大発電電力のＤＵＴＹ１００％の間でオルタネータ２を制御する（ステップＳ３〜ステップＳ９）。 When it is determined that ΣI> αAh is not satisfied, it is determined whether or not the charge / discharge current integrated value ΣI ≦ 0 is satisfied (step S14), and when the charge / discharge current integrated value ΣI is smaller than 0, power generation suppression control is performed. Is permitted (power generation suppression control permission = 1, step S15). When the charge / discharge current integrated value ΣI is 0 or more and α or less (0 ≦ ΣI ≦ α), permission / non-permission of power generation suppression control is not changed.
After all, when 0 <ΣI ≦ αAh, if the power generation suppression control is already permitted, the battery 3 has not been discharged too much. Therefore, the power generation suppression control permission (power generation suppression control permission) is set to reduce the driving load of the alternator 2. = 1) is continued, and if the power generation suppression control is not permitted, the disapproval continues until ΣI ≦ αAh.
When the power generation suppression control is permitted, as described above, the alternator 2 is controlled between DUTY 0% of the minimum generated power and DUTY 100% of the maximum generated power so as to obtain an optimal power generation amount (steps S3 to S9).

このように説明したように、本実施例に係るアイドルストップ車両の制御装置によれば、例えば、充放電電流積算値ΣＩが０からαＡｈになるまでは発電抑制制御を行い燃費を向上させることが出来る。
また、アイドリングストップ若しくは発電抑制制御により、αＡｈを越えて放電した場合には、発電抑制制御を禁止して目標ＤＵＴＹ１００％で発電し、発電抑制制御で放電側に推移することがないようにできる。 As described above, according to the control apparatus for the idle stop vehicle according to the present embodiment, for example, the power generation suppression control is performed until the charge / discharge current integrated value ΣI changes from 0 to αAh, thereby improving the fuel consumption. I can do it.
Moreover, when it discharges exceeding (alpha) Ah by idling stop or electric power generation suppression control, electric power generation suppression control is prohibited, it can generate electric power with target DUTY100%, and it can prevent it changing to the discharge side by electric power generation suppression control.

更に、充放電電流積算値ΣＩがαＡｈを越えて放電側となったときには、発電抑制制御を禁止しているため、充電側へ移行し易くなり、アイドリングストップ禁止制御における閾値として設定される放電量β（＞α）に相当する値を超えにくくなるので、アイドリングストップ禁止制御に至る可能性は低くなる。
つまり、アイドリングストップに大きな影響を与えることなく、発電抑制制御を行い総合的に燃費を向上できる。 Further, when the charge / discharge current integrated value ΣI exceeds αAh and becomes the discharge side, since the power generation suppression control is prohibited, it is easy to shift to the charge side, and the discharge amount set as the threshold value in the idling stop prohibition control Since it becomes difficult to exceed a value corresponding to β (> α), the possibility of reaching idling stop prohibition control is reduced.
In other words, the power generation suppression control can be performed and the fuel consumption can be improved comprehensively without greatly affecting the idling stop.

図３に、本実施例における実走行時の充放電電流積算値の挙動を示す。
図３に示すように、放電が進んだ場合に発電抑制制御禁止となり、過放電を未然に防止して、アイドルストップ禁止制御に至ることを防止できている。そのため、本実施例によれば、アイドルストップ制御と発電抑制制御の利点を最大限に活用でき、総合的な燃費が向上することが判る。 FIG. 3 shows the behavior of the charge / discharge current integrated value during actual traveling in the present embodiment.
As shown in FIG. 3, when the discharge progresses, the power generation suppression control is prohibited, and overdischarge can be prevented before the idle stop prohibition control is reached. Therefore, according to the present embodiment, it can be seen that the advantages of the idle stop control and the power generation suppression control can be utilized to the maximum, and the overall fuel efficiency is improved.

本発明は、アイドリングストップ車両の制御装置として広く利用可能なものである。   The present invention can be widely used as a control device for an idling stop vehicle.

本発明の一実施例に係るアイドルストップ車両の概略構成図である。1 is a schematic configuration diagram of an idle stop vehicle according to an embodiment of the present invention. 本発明の一実施例に係るアイドルストップ車両の制御過程を示すフローチャートである。3 is a flowchart illustrating a control process of an idle stop vehicle according to an embodiment of the present invention. １０・１５モード５回連続時の充放電電流積算値の挙動を示すグラフである。It is a graph which shows the behavior of the charging / discharging electric current integrated value at the time of 10 * 15 mode 5 times continuous. 図４の下段は放電量に対するアイドリングストップの頻度（Frequency）の関係を示すグラフ、図４の上段は放電量に対するアイドリングストップの累計（Accumulation）との関係を示すグラフである。The lower part of FIG. 4 is a graph showing the relationship of the idling stop frequency to the discharge amount, and the upper part of FIG. 4 is a graph showing the relation of the idling stop accumulation to the discharge amount.

符号の説明Explanation of symbols

１ エンジン
２ 発電機（オルタネータ）
３ 電機負荷
４ ＥＣＵ
６，７ 電流センサ
８ 電圧センサ
１１ スタータモータ
1 Engine 2 Generator (alternator)
3 Electric load 4 ECU
6,7 Current sensor 8 Voltage sensor 11 Starter motor

Claims (5)

エンジンにより駆動されバッテリ及び電気負荷に給電する発電機を備え、所定のエンジン自動停止条件が成立すると上記エンジンを自動的に停止させるアイドルストップ車両の制御装置において、上記バッテリの充放電電流積算値を検出する電流積算値検出手段と、所定の条件で上記発電機の発電作動を抑制させると共に、上記電流積算値検出手段により検出された上記積算値が放電側に第１所定値以上であるときは上記発電作動の抑制を禁止する発電抑制制御手段と、上記電流積算値検出手段により検出された上記積算値が上記第１所定値より放電側の第２所定値以上であるときは上記エンジン自動停止条件が成立しても上記エンジンの自動停止を禁止する自動停止制御手段とを備えたことを特徴とするアイドルストップ車両の制御装置。   In a control device for an idle stop vehicle that includes a generator driven by an engine and that supplies power to a battery and an electric load, and that automatically stops the engine when a predetermined engine automatic stop condition is satisfied, the charge / discharge current integrated value of the battery is When the current integrated value detection means to detect and the power generation operation of the generator is suppressed under a predetermined condition, and the integrated value detected by the current integrated value detection means is equal to or greater than a first predetermined value on the discharge side The power generation suppression control means for prohibiting the suppression of the power generation operation, and the engine automatic stop when the integrated value detected by the current integrated value detecting means is greater than or equal to a second predetermined value on the discharge side from the first predetermined value. An idle stop vehicle control device comprising: an automatic stop control means for prohibiting the automatic stop of the engine even if a condition is satisfied. 請求項１において、前記電流積算値検出手段は、電気負荷の消費電流を検出する消費電流検出手段と、上記発電機により発電される発電電流を検出する発電電流検出手段と、上記消費電流検出手段で検出される消費電流と上記発電電流検出手段で検出される発電電流との差を積算する積算手段とから構成されることを特徴とするアイドルストップ車両の制御装置。   2. The current integrated value detection means according to claim 1, wherein the current consumption value detection means detects a consumption current of an electric load, a generated current detection means detects a generated current generated by the generator, and the consumed current detection means. A control device for an idle stop vehicle, characterized by comprising an integrating means for integrating the difference between the consumption current detected in step 1 and the generated current detected by the generated current detection means. 請求項１又は２において、前記発電抑制制御手段は、上記所定条件として、減速時以外の場合に発電作動を抑制させることを特徴とするアイドルストップ車両の制御装置。   3. The control apparatus for an idle stop vehicle according to claim 1, wherein the power generation suppression control means suppresses the power generation operation when the vehicle is not decelerated as the predetermined condition. 請求項１又は２において、前記発電抑制制御手段は、上記所定条件として、上記電気負荷による消費電流と略同等の発電電流となるよう上記発電機を制御することを特徴とするアイドルストップ車両の制御装置。   3. The control of the idle stop vehicle according to claim 1, wherein the power generation suppression control unit controls the generator so that a power generation current substantially equal to a current consumed by the electric load is set as the predetermined condition. apparatus. 請求項１又は２において、上記発電抑制制御手段は、発電作動の抑制が一旦禁止になると、上記積算値が上記第１所定値よりも充電側の第３所定値になるまで禁止を継続することを特徴とするアイドルストップ車両の制御装置。
3. The power generation suppression control means according to claim 1, wherein once the suppression of the power generation operation is prohibited, the power generation suppression control means continues the prohibition until the integrated value becomes a third predetermined value on the charging side with respect to the first predetermined value. A control apparatus for an idle stop vehicle.
JP2004201366A 2004-07-08 2004-07-08 Control device for idling stop vehicle Pending JP2006022710A (en)

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KR101003218B1 (en) 2008-10-21 2010-12-21 콘티넨탈 오토모티브 시스템 주식회사 Idle stop ? go system's control method
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US20110232597A1 (en) * 2007-08-23 2011-09-29 Valeo Equipements Electriques Moteur Method and device for controlling an engine stop/restart system to be mounted on an automobile
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US7932699B2 (en) 2006-12-11 2011-04-26 Hyundai Motor Company Method of controlling battery charge level of hybrid electric vehicle
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US20110232597A1 (en) * 2007-08-23 2011-09-29 Valeo Equipements Electriques Moteur Method and device for controlling an engine stop/restart system to be mounted on an automobile
US8050851B2 (en) * 2008-02-13 2011-11-01 Toyota Jidosha Kabushiki Kaisha Power output apparatus, vehicle equipped with power output apparatus, driving system, and control method of power output apparatus
KR101003218B1 (en) 2008-10-21 2010-12-21 콘티넨탈 오토모티브 시스템 주식회사 Idle stop ? go system's control method
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JPWO2013111178A1 (en) * 2012-01-24 2015-05-11 トヨタ自動車株式会社 Vehicle control apparatus, vehicle, and vehicle control method
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