JP4601695B2 - Electric supercharger control device for internal combustion engine - Google Patents

Electric supercharger control device for internal combustion engine Download PDF

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JP4601695B2
JP4601695B2 JP2008235211A JP2008235211A JP4601695B2 JP 4601695 B2 JP4601695 B2 JP 4601695B2 JP 2008235211 A JP2008235211 A JP 2008235211A JP 2008235211 A JP2008235211 A JP 2008235211A JP 4601695 B2 JP4601695 B2 JP 4601695B2
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supercharger
control device
flow rate
supply power
intake air
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JP2010065656A (en
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英之 田中
陽平 明石
亮 中村
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Mitsubishi Electric Corp
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    • 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
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    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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    • Y02T10/12—Improving ICE efficiencies

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Description

この発明は、電動機で駆動される過給機を吸気通路に設けた内燃機関の電動過給機制御装置に関するものである。   The present invention relates to an electric supercharger control device for an internal combustion engine in which a supercharger driven by an electric motor is provided in an intake passage.

従来から、自動車の低燃費化を目的として、内燃機関（エンジン）の出力を増加させるために、吸気通路上に電動機で駆動される過給機を設ける技術が知られている。
この場合、過給機はタービンとコンプレッサとを結ぶ軸上に配設され、エンジン低回転時には電動機により回転駆動され、エンジン高回転時には排気タービン（排気ガス）により回転駆動される。 2. Description of the Related Art Conventionally, a technique for providing a supercharger driven by an electric motor on an intake passage is known in order to increase the output of an internal combustion engine (engine) for the purpose of reducing the fuel consumption of an automobile.
In this case, the supercharger is disposed on a shaft connecting the turbine and the compressor, and is rotated by an electric motor when the engine is rotating at a low speed, and is driven by an exhaust turbine (exhaust gas) when the engine is at a high speed.

一方、過給機のコンプレッサは、エンジン回転速度が低い（吸入空気量が少ない）状態でコンプレッサ圧縮圧が低下すると、サージ現象を引き起こして衝撃や振動により過給機内の軸受やインペラなどを破損する可能性がある。
逆に、電動機への供給電力の低下などにより、空気流量に対して十分な回転速度を確保できない場合には、過給機が吸気損失となる可能性がある。 On the other hand, when the compressor compression pressure of the turbocharger compressor is low with the engine rotation speed being low (small amount of intake air), a surge phenomenon is caused and the bearings and impellers inside the turbocharger are damaged due to shock and vibration. there is a possibility.
On the other hand, when a sufficient rotational speed cannot be ensured with respect to the air flow rate due to a decrease in the power supplied to the motor, the turbocharger may become an intake loss.

そこで、従来の内燃機関の電動過給機制御装置として、バイパス通路上に逆止弁を設け、コンプレッサの上流側から下流側への吸入空気の流動のみを許容する技術が提案されている（たとえば、特許文献１参照）。   Thus, as a conventional electric supercharger control device for an internal combustion engine, a technique has been proposed in which a check valve is provided on the bypass passage and only the flow of intake air from the upstream side to the downstream side of the compressor is allowed (for example, , See Patent Document 1).

また、吸気通路を２方向に分岐した後に合流させる構成とし、一方の分岐路上には電動機で駆動される過給機を設け、分岐路の合流部には流量調整手段（いずれかの分岐路からの吸入空気を下流側に流すかを調整する手段）を設ける装置も提案されている（たとえば、特許文献２参照）。   In addition, the intake passage is configured to be merged after branching in two directions, and a supercharger driven by an electric motor is provided on one branch passage, and a flow rate adjusting means (from any branch passage) is provided at the junction portion of the branch passage. Has also been proposed (see Patent Document 2, for example).

特開２００７−７１１５０号公報JP 2007-71150 A 特開２００４−３０８４９０号公報JP 2004-308490 A

従来の内燃機関の電動過給機制御装置は、特許文献１の場合には、逆止弁を用いているので、流量を調整することができず、過給機が吸入空気抵抗となる場合には最適な過給機能を実現することができないという課題があった。
また、特許文献２の流量調整手段は、バイパス通路と過給機の空気量が同等となった場合にバイパス通路を遮断することから、供給電力の低下を考慮していないので、適正な空気量が得られず、過給機が吸気損失となる可能性があるという課題があった。 Since the conventional electric supercharger control device for an internal combustion engine uses a check valve in the case of Patent Document 1, the flow rate cannot be adjusted, and the supercharger has an intake air resistance. Had the problem that it could not realize the optimum supercharging function.
Further, since the flow rate adjusting means of Patent Document 2 shuts off the bypass passage when the amount of air in the bypass passage and the supercharger becomes equal, an appropriate amount of air is not taken into consideration because the reduction in supply power is not taken into consideration. However, there is a problem that the turbocharger may become an intake loss.

この発明は、上記のような課題を解決するためになされたものであり、過給機供給電力に応じて、過給機が吸気損失とならないように、バイパス通路側と過給機側との空気量を制御し、最適な過給が可能な内燃機関の電動過給機制御装置を得ることを目的とする。   The present invention has been made to solve the above-described problems, and according to the supercharger supply power, the bypass passage side and the supercharger side are arranged so that the supercharger does not cause intake loss. An object of the present invention is to obtain an electric supercharger control device for an internal combustion engine capable of controlling the amount of air and optimally supercharging.

この発明による内燃機関の電動過給機制御装置は、内燃機関の吸気通路に配置された過給機と、過給機を駆動する電動機と、過給機の上流側の吸気通路と過給機の下流側の吸気通路とを連通させて、過給機をバイパスするバイパス通路と、バイパス通路を通過する空気流量を調整する流量調整手段と、電動機および流量調整手段を制御する制御装置と、制御装置に入力される過給機供給電力を検出する電力検出手段とを備え、制御装置は、あらかじめ定められた電力基準値と過給機供給電力とを比較し、過給機供給電力が電力基準値を下回った場合に、流量調整手段を開放制御するものである。
An electric supercharger control apparatus for an internal combustion engine according to the present invention includes a supercharger disposed in an intake passage of the internal combustion engine, an electric motor that drives the supercharger, an intake passage upstream of the supercharger, and a supercharger A bypass passage that bypasses the turbocharger, a flow rate adjusting means that adjusts an air flow rate that passes through the bypass passage, a control device that controls the motor and the flow rate adjusting means, and a control Power detection means for detecting the supercharger supply power input to the device, the control device compares a predetermined power reference value with the supercharger supply power, and the supercharger supply power is the power reference When the value falls below the value, the flow rate adjusting means is controlled to be opened .

この発明によれば、過給機供給電力に応じて、過給機が吸気損失とならないように、バイパス通路側と過給機側との空気量を制御することにより、最適な過給機能を実現することができる。   According to the present invention, the optimum supercharging function is achieved by controlling the air amount on the bypass passage side and the supercharger side so that the supercharger does not cause intake air loss according to the supercharger supply power. Can be realized.

実施の形態１．
以下、図面を参照しながら、この発明の実施の形態１について詳細に説明する。
図１はこの発明の実施の形態１に係る内燃機関の電動過給機制御装置の全体構成を概略的に示すブロック構成図である。 Embodiment 1 FIG.
Hereinafter, the first embodiment of the present invention will be described in detail with reference to the drawings.
1 is a block diagram schematically showing the overall configuration of an electric supercharger control device for an internal combustion engine according to Embodiment 1 of the present invention.

図１において、エンジン１は、インジェクタ１２によってシリンダ１８内に燃料が噴射される筒内噴射タイプからなり、多気筒エンジンのうちの１気筒のみが断面図として示されている。
シリンダ１８内には、クランク２０を回転駆動するピストン１９が、摺動自在に設けられている。 In FIG. 1, the engine 1 is an in-cylinder injection type in which fuel is injected into a cylinder 18 by an injector 12, and only one cylinder of a multi-cylinder engine is shown as a cross-sectional view.
A piston 19 that rotationally drives the crank 20 is slidably provided in the cylinder 18.

なお、エンジン１としては、シリンダ１８内に燃料を直接噴射する筒内噴射タイプ（図１参照）に限らず、スロットルバルブ８の下流側の吸気通路１７に燃料を噴射するポート噴射タイプ（図示せず）を適用することも可能である。   The engine 1 is not limited to an in-cylinder injection type (see FIG. 1) that directly injects fuel into the cylinder 18, but a port injection type (not shown) that injects fuel into the intake passage 17 on the downstream side of the throttle valve 8. It is also possible to apply

エンジン１は、電動機１４によって駆動される過給機１３により、多くの吸入空気を過給して、高出力化のみでなく低燃費化を実現するとように構成されている。
電動機１４は、排気ガスにより駆動される排気タービン１５と過給機１３とを結ぶ軸上に設置されており、制御装置１６からの制御信号を受けて動作する。過給機１３および電動機１４の詳細動作については後述する。 The engine 1 is configured to supercharge a large amount of intake air by a supercharger 13 driven by an electric motor 14 to realize not only high output but also low fuel consumption.
The electric motor 14 is installed on a shaft connecting the exhaust turbine 15 driven by the exhaust gas and the supercharger 13, and operates in response to a control signal from the control device 16. Detailed operations of the supercharger 13 and the electric motor 14 will be described later.

エンジン１に供給される吸入空気は、まず、上流側の吸気通路２に設置されたエアクリーナ３によりゴミや塵などが取り除かれた後、過給機１３が設けられた吸気通路４に導入される。
ここで、吸気通路２は、過給機１３に通じる吸気通路４と、バイパス通路５との２方向に分岐された後、それぞれの下流側で合流される。 The intake air supplied to the engine 1 is first introduced into an intake passage 4 provided with a supercharger 13 after dust and dust are removed by an air cleaner 3 installed in the intake passage 2 on the upstream side. .
Here, after the intake passage 2 is branched in two directions of the intake passage 4 leading to the supercharger 13 and the bypass passage 5, the intake passage 2 is merged at each downstream side.

バイパス通路５上には、バイパス弁の空気流量（バイパス通路５内を通過するバイパス空気流量）を任意に調整可能な流量調整手段６が設けられており、流量調整手段６は、制御装置１６からの制御信号を受けてバイパス空気流量を調整する。
なお、流量調整手段６は、たとえば電気的に駆動される電磁バルブなどにより実現可能である。流量調整手段６の詳細動作については後述する。 On the bypass passage 5, a flow rate adjusting means 6 capable of arbitrarily adjusting an air flow rate of the bypass valve (a bypass air flow rate passing through the bypass passage 5) is provided. The bypass air flow rate is adjusted in response to the control signal.
The flow rate adjusting means 6 can be realized by, for example, an electrically driven electromagnetic valve. Detailed operation of the flow rate adjusting means 6 will be described later.

吸気通路４およびバイパス通路５は再合流した後、インタークーラ７に導入される。
インタークーラ７は、過給機１３によって圧力および温度が上昇した吸入空気の温度を下げることにより、充填効率を向上させる。
過給された吸入空気は、さらにスロットルバルブ８および吸気通路１７を通じて、エンジン１のシリンダ１８に吸入される。 The intake passage 4 and the bypass passage 5 are rejoined and then introduced into the intercooler 7.
The intercooler 7 improves the charging efficiency by lowering the temperature of the intake air whose pressure and temperature have been increased by the supercharger 13.
The supercharged intake air is further drawn into the cylinder 18 of the engine 1 through the throttle valve 8 and the intake passage 17.

エンジン１において、過給された吸入空気は、吸入弁９の開放時にシリンダ１８内に充填され、インジェクタ１２からの燃料噴射により混合気となった後、点火プラグ１０の駆動により点火燃焼される。   In the engine 1, the supercharged intake air is filled in the cylinder 18 when the intake valve 9 is opened, and after being mixed with fuel injected from the injector 12, is ignited and burned by driving the spark plug 10.

燃焼後の混合気は、排気弁１１の開放時に排気され、排気ガスとなって排気タービン１５を駆動する。また、排気通路には、排気ガスを浄化するための排気浄化触媒２１が取り付けられている。   The air-fuel mixture after combustion is exhausted when the exhaust valve 11 is opened, and becomes exhaust gas to drive the exhaust turbine 15. An exhaust purification catalyst 21 for purifying exhaust gas is attached to the exhaust passage.

図１のように、内燃機関の電動過給機制御装置は、エンジン１の吸気通路４上に設置されて電動機１４により駆動される過給機１３と、過給機１３をバイパスするように過給機１３の上流と下流とを連通するバイパス通路５と、バイパス通路５内の流量を調整するためのバイパス弁を有する流量調整手段６と、過給機１３を駆動するための制御装置１６とを備えている。   As shown in FIG. 1, the electric supercharger control apparatus for an internal combustion engine includes a supercharger 13 installed on the intake passage 4 of the engine 1 and driven by the electric motor 14, and bypasses the supercharger 13. A bypass passage 5 communicating between the upstream and downstream of the feeder 13, a flow rate adjusting means 6 having a bypass valve for adjusting the flow rate in the bypass passage 5, and a control device 16 for driving the supercharger 13; It has.

また、各種センサ（図示せず）として、制御装置１６に供給される過給機供給電力を検出する電力検出手段と、吸入空気量を検出する吸入空気量検出手段とを備えている。
制御装置１６は、過給機供給電力および吸入空気量を用いてバイパス通路５内のバイパス弁を制御することにより、過給機供給電力が低下した場合でも適正な過給圧を得るように構成されている。 Further, as various sensors (not shown), a power detection unit for detecting the supercharger supply power supplied to the control device 16 and an intake air amount detection unit for detecting the intake air amount are provided.
The control device 16 is configured to obtain an appropriate supercharging pressure even when the supercharger supply power is reduced by controlling the bypass valve in the bypass passage 5 using the supercharger supply power and the intake air amount. Has been.

次に、制御装置１６の制御下でバイパス空気流量および過給空気流量を調整する流量調整手段６および電動機１４の動作について説明する。
制御装置１６は、各種センサからの指令値（エンジン回転速度、アクセル開度、過給機供給電力、吸入圧、吸入空気量など）を受けて、流量調整手段６および電動機１４を駆動制御する。 Next, operations of the flow rate adjusting means 6 and the electric motor 14 for adjusting the bypass air flow rate and the supercharged air flow rate under the control of the control device 16 will be described.
The control device 16 receives and controls command values (engine rotational speed, accelerator opening, supercharger supply power, intake pressure, intake air amount, etc.) from various sensors and controls the flow rate adjusting means 6 and the electric motor 14.

具体的には、上記指令値のうちの過給機供給電力については、たとえば供給電流を検出すればよい。供給電流を検出することができれば、制御装置１６において、電流値と電圧値との乗算により過給機供給電力の演算が可能となる。   Specifically, for the supercharger supply power in the command value, for example, a supply current may be detected. If the supply current can be detected, the control device 16 can calculate the supercharger supply power by multiplying the current value and the voltage value.

また、吸入圧については、たとえばスロットルバルブ８の下流側の吸気通路１７内に圧力センサなどを設けることにより検出可能となる。
さらに、吸入空気量については、たとえばエアクリーナ３の後方などにエアーフローセンサなどを設けることにより検出可能である。 The intake pressure can be detected by providing a pressure sensor or the like in the intake passage 17 on the downstream side of the throttle valve 8, for example.
Further, the amount of intake air can be detected by providing an air flow sensor or the like behind the air cleaner 3, for example.

制御装置１６は、たとえばエンジンコンピュータ（図示せず）からの過給指令値を受けて、電動機１４を制御する。
このとき、吸気圧が必要過給圧に達していない場合には、電動機１４を駆動して過給機１３による過給圧を助成する。一方、エンジン１の排気ガスによって電動機１４の回転速度が十分に得られる場合には、電動機１４を発電機として作用させることができる。
なお、排気タービン１５を除去して、吸気通路４に電動機１４および過給機１３のみを配設し、電気エネルギーのみで過給されるいわゆる電動ブロアを適用してもよい。 For example, the control device 16 receives a supercharging command value from an engine computer (not shown) and controls the electric motor 14.
At this time, if the intake pressure has not reached the required supercharging pressure, the motor 14 is driven to assist the supercharging pressure by the supercharger 13. On the other hand, when the rotational speed of the electric motor 14 is sufficiently obtained by the exhaust gas of the engine 1, the electric motor 14 can be operated as a generator.
Alternatively, a so-called electric blower in which only the electric motor 14 and the supercharger 13 are disposed in the intake passage 4 and supercharged only by electric energy may be applied by removing the exhaust turbine 15.

以下、図２のフローチャートおよび図３の説明図を参照しながら、図１に示したこの発明の実施の形態１による制御装置１６の具体的な動作について説明する。
図２において、まず、制御装置１６は、エンジン回転速度、アクセル開度、過給機供給電力、吸入圧、吸入空気量を、マイクロコンピュータのメモリ（図示せず）に読み込み、指令値として記憶する（ステップＳ２０１）。 The specific operation of control device 16 according to Embodiment 1 of the present invention shown in FIG. 1 will be described below with reference to the flowchart of FIG. 2 and the explanatory diagram of FIG.
In FIG. 2, first, the control device 16 reads the engine speed, the accelerator opening, the supercharger supply power, the intake pressure, and the intake air amount into a memory (not shown) of the microcomputer and stores it as a command value. (Step S201).

続いて、エンジン回転速度およびアクセル開度を用いて、電動機１４による目標過給アシスト量を演算する（ステップＳ２０２）。
具体的には、たとえば、エンジン回転速度およびアクセル開度に応じて、必要な過給アシスト量をマップデータとしてあらかじめ記憶しておき、マップ参照により演算すれことができる。なお、目標過給アシスト量のマップデータは、個々の車両に応じて異なることは言うまでもない。 Subsequently, a target supercharging assist amount by the electric motor 14 is calculated using the engine rotation speed and the accelerator opening (step S202).
Specifically, for example, the required supercharging assistance amount can be stored in advance as map data according to the engine speed and the accelerator opening, and can be calculated by referring to the map. Needless to say, the map data of the target supercharging assist amount varies depending on the individual vehicle.

続いて、制御装置１６は、吸入圧および吸入空気量を用いて過給電力換算値（目標過給アシスト量に対応した電力基準値）を演算する（ステップＳ２０３）。
このとき、過給電力換算値は、たとえば図３に示す過給電力換算線（実線参照）をマップデータとしてあらかじめ保有しておくことにより、マップ演算から取得することができる。 Subsequently, the control device 16 calculates a supercharging power conversion value (a power reference value corresponding to the target supercharging assist amount) using the suction pressure and the intake air amount (step S203).
At this time, the supercharged electric power conversion value can be acquired from the map calculation by holding, for example, the supercharging electric power conversion line (see the solid line) shown in FIG. 3 in advance as map data.

次に、過給電力換算値と過給機供給電力とを比較し（ステップＳ２０４）、過給機１３による過給が可能であるか否かを判定する（ステップＳ２０５）。
ステップＳ２０５において、過給機供給電力があらかじめマイクロコンピュータに定めてある閾値（電力基準値）以上であって、過給機１３での過給が可能（すなわち、ＹＥＳ）と判定されれば、流量調整手段６によりバイパス通路５を閉成して、過給機側からのみ空気が流れるようにして（ステップＳ２０６）、図２の処理ルーチンを終了する。 Next, the supercharged power conversion value and the supercharger supply power are compared (step S204), and it is determined whether or not supercharging by the supercharger 13 is possible (step S205).
If it is determined in step S205 that the supercharger supply power is equal to or greater than a threshold value (power reference value) predetermined in the microcomputer and supercharger 13 is capable of supercharging (that is, YES), The bypass passage 5 is closed by the adjusting means 6 so that air flows only from the supercharger side (step S206), and the processing routine of FIG.

一方、ステップＳ２０５において、過給機供給電力が電力基準値を下回り、過給機１３での過給が不可能（すなわち、ＮＯ）と判定されれば、過給機１３が吸入空気抵抗とならないように、流量調整手段６によりバイパス通路５を開放して、バイパス通路５からのみ吸入空気が流れるようにして（ステップＳ２０７）、図２の処理ルーチンを終了する。   On the other hand, if it is determined in step S205 that the supercharger supply power is lower than the power reference value and the supercharger 13 cannot perform supercharging (that is, NO), the supercharger 13 does not become the intake air resistance. Thus, the bypass passage 5 is opened by the flow rate adjusting means 6 so that the intake air flows only from the bypass passage 5 (step S207), and the processing routine of FIG.

このように、制御装置１６に対する過給機供給電力が低下した場合に、バイパス通路５を開放することにより、過給機１３において過給圧が低下して過給機１３が吸入空気抵抗となることを抑制することができ、適正な過給圧を得ることができる。   As described above, when the supercharger supply power to the control device 16 is reduced, by opening the bypass passage 5, the supercharging pressure is reduced in the supercharger 13 and the supercharger 13 becomes the intake air resistance. This can be suppressed, and an appropriate supercharging pressure can be obtained.

なお、上記説明では特に言及しなかったが、たとえば排気ガスにより高負荷で過給される場合などにおいては、前述したサージによる過給機１３の破損を予防するために、バイパス通路５を開放制御してもよい。
また、逆に、低負荷時のチョークを回避するように、バイパス通路５を開放制御してもよい。 Although not particularly mentioned in the above description, for example, when the exhaust gas is supercharged with a high load, the bypass passage 5 is controlled to be open in order to prevent the turbocharger 13 from being damaged by the surge described above. May be.
Conversely, the bypass passage 5 may be controlled to be open so as to avoid choke at low load.

このとき、サージまたはチョークを回避するための制御基準として、図３内のサージ線（１点鎖線参照）またはチョーク線（２点鎖線参照）が用いられる。
このように、種々の状況に応じて流量調整手段６を制御することにより、さらに最適な過給圧を得ることが可能となる。 At this time, the surge line (see the one-dot chain line) or the choke line (see the two-dot chain line) in FIG. 3 is used as a control standard for avoiding the surge or the choke.
As described above, by controlling the flow rate adjusting means 6 in accordance with various situations, it is possible to obtain a further optimum supercharging pressure.

以上のように、この発明の実施の形態１による制御装置１６は、過給機供給電力に応じて、電動機１４による過給が可能であるか否かの制御信号を調整するのみでなく、サージやチョークを予防するための制御信号をも調整して、バイパス通路５における流量調整手段６を制御するので、最適な過給圧を得ることが可能となる。   As described above, the control device 16 according to the first embodiment of the present invention not only adjusts the control signal as to whether or not supercharging by the electric motor 14 is possible according to the supercharger supply power, but also surges. Further, the control signal for preventing the choke is also adjusted to control the flow rate adjusting means 6 in the bypass passage 5, so that an optimum supercharging pressure can be obtained.

また、制御装置１６は、電力検出手段からの過給機供給電力に応じて流量調整手段６を制御したが、過給機１３の下流側の第１の吸入空気量を検出する第１の吸入空気量検出手段（図示せず）をさらに設け、過給機供給電力と第１の吸入空気量とに応じて流量調整手段６を制御してもよい。   Further, the control device 16 controls the flow rate adjusting means 6 according to the supercharger supply power from the power detection means, but the first intake air that detects the first intake air amount on the downstream side of the supercharger 13. An air amount detecting means (not shown) may be further provided, and the flow rate adjusting means 6 may be controlled according to the supercharger supply power and the first intake air amount.

また、バイパス通路５を経由する第２の吸入空気量を検出する第２の吸入空気量検出手段（図示せず）をさらに設け、過給機供給電力と第１および第２の吸入空気量とに応じて流量調整手段６を制御してもよい。
さらに、過給機１３の下流側の空気圧を過給圧として検出する過給圧検出手段（図示せず）を設け、過給機供給電力と過給圧とに応じて流量調整手段６を制御してもよい。
上記のいずれの場合も、前述と同等の作用効果を奏する。 Further, second intake air amount detection means (not shown) for detecting the second intake air amount passing through the bypass passage 5 is further provided, and the supercharger supply power, the first and second intake air amounts, The flow rate adjusting means 6 may be controlled according to the above.
Further, a supercharging pressure detecting means (not shown) for detecting the air pressure downstream of the supercharger 13 as a supercharging pressure is provided, and the flow rate adjusting means 6 is controlled according to the supercharger supply power and the supercharging pressure. May be.
In any of the above cases, the same effects as described above can be obtained.

この発明の実施の形態１に係る内燃機関の電動過給機制御装置（図１）は、内燃機関の吸気通路４に配置された過給機１３と、過給機１３を駆動する電動機１４と、過給機１３の上流側の吸気通路と過給機１３の下流側の吸気通路とを連通させて、過給機１３をバイパスするバイパス通路５と、バイパス通路５を通過する空気流量を調整する流量調整手段６と、電動機１３および流量調整手段６を制御する制御装置１６と、制御装置１６に入力される過給機供給電力を検出する電力検出手段とを備え、制御装置１６は、過給機供給電力に応じて流量調整手段６を制御する。   An electric supercharger control apparatus for an internal combustion engine (FIG. 1) according to Embodiment 1 of the present invention includes a supercharger 13 disposed in an intake passage 4 of the internal combustion engine, and an electric motor 14 that drives the supercharger 13. By connecting the intake passage on the upstream side of the supercharger 13 and the intake passage on the downstream side of the supercharger 13, the bypass passage 5 that bypasses the supercharger 13 and the air flow rate that passes through the bypass passage 5 are adjusted. A flow rate adjusting means 6 for controlling the electric motor 13 and the flow rate adjusting means 6, and a power detecting means for detecting the supercharger supply power input to the control device 16. The flow rate adjusting means 6 is controlled in accordance with the supply power of the feeder.

また、過給機１３の下流側の第１の吸入空気量を検出する第１の吸入空気量検出手段を備え、制御装置１６は、過給機供給電力および第１の吸入空気量に応じて流量調整手段を制御する。
また、バイパス通路５を経由する第２の吸入空気量を検出する第２の吸入空気量検出手段を備え、制御装置１６は、過給機供給電力と第１および第２の吸入空気量とに応じて、流量調整手段を制御する。 In addition, a first intake air amount detection means for detecting a first intake air amount downstream of the supercharger 13 is provided, and the control device 16 responds to the supercharger supply power and the first intake air amount. Control the flow rate adjusting means.
In addition, a second intake air amount detecting means for detecting a second intake air amount passing through the bypass passage 5 is provided, and the control device 16 converts the supercharger supply power and the first and second intake air amounts. Accordingly, the flow rate adjusting means is controlled.

また、過給機１３の下流側の空気圧を過給圧として検出する過給圧検出手段を備え、制御装置１６は、過給機供給電力と過給圧とに応じて流量調整手段６を制御する。
さらに、制御装置１６は、過給機供給電力があらかじめ定められた電力基準値を下回った場合に、流量調整手段６を制御してバイパス通路５を開放する。 In addition, a supercharging pressure detection unit that detects an air pressure downstream of the supercharger 13 as a supercharging pressure is provided, and the control device 16 controls the flow rate adjusting unit 6 according to the supercharger supply power and the supercharging pressure. To do.
Further, the control device 16 opens the bypass passage 5 by controlling the flow rate adjusting means 6 when the supercharger supply power falls below a predetermined power reference value.

なお、上記実施の形態１では、電力検出手段において、供給電流に基づいて過給機供給電力を演算したが、バッテリから電力供給される場合には、ＳＯＣ（Ｓｔａｔｅ ｏｆ Ｃｈａｒｇｅ：残容量）センサなどの電力容量監視センサを用いても同様の効果を得ることが可能となる。   In the first embodiment, the supercharger supply power is calculated based on the supply current in the power detection unit. However, when power is supplied from the battery, a SOC (State of Charge) sensor or the like is used. Even if the power capacity monitoring sensor is used, the same effect can be obtained.

また、制御装置１６として、たとえばエンジンコンピュータなどにより機能を集約できる場合には、制御装置１６は、電動機１４を駆動する単純なドライバ機能のみを有していてよく、同様の効果を得ることが可能となる。   Further, when the functions can be aggregated by the engine computer, for example, as the control device 16, the control device 16 may have only a simple driver function for driving the electric motor 14, and the same effect can be obtained. It becomes.

また、電力基準値として、吸入圧および吸入空気量を用いて過給電力換算値（図３）を演算したが、これらの値が一義的に得られない場合には、エンジン回転速度やアクセル開度から推定演算してもよい。これにより、簡素な構成で同様の効果を得ることが可能となる。   In addition, although the supercharging power conversion value (Fig. 3) was calculated using the intake pressure and the intake air amount as the power reference value, if these values cannot be obtained uniquely, the engine speed and the accelerator open state are calculated. The estimation may be calculated from the degree. This makes it possible to obtain the same effect with a simple configuration.

さらに、図１の構成例に限らず、たとえば、過給機１３の下流側に機械式ターボチャージャー（図示せず）が設けられた、いわゆるツインターボ構成においても、同様の効果が得られる。   Further, the same effect can be obtained not only in the configuration example of FIG. 1 but also in a so-called twin turbo configuration in which a mechanical turbocharger (not shown) is provided on the downstream side of the supercharger 13, for example.

以上、この発明の実施の形態１について説明したが、この発明は上記構成に限定されるものではなく、この発明の範囲内において種々の形態が実施可能であることは、当業者にとって明らかである。   Although the first embodiment of the present invention has been described above, the present invention is not limited to the above-described configuration, and it will be apparent to those skilled in the art that various modes can be implemented within the scope of the present invention. .

この発明の実施の形態１に係る内燃機関の電動過給機制御装置の全体構成を概略的に示すブロック構成図である。1 is a block configuration diagram schematically showing an overall configuration of an electric supercharger control device for an internal combustion engine according to Embodiment 1 of the present invention. FIG. この発明の実施の形態１による制御動作を示すフローチャートである。It is a flowchart which shows the control action by Embodiment 1 of this invention. この発明の実施の形態１に適用される電力、過給圧および空気流量のマップデータを示す説明図である。It is explanatory drawing which shows the map data of the electric power applied to Embodiment 1 of this invention, a supercharging pressure, and an air flow rate.

符号の説明Explanation of symbols

１ エンジン、２、４、１７ 吸気通路、５ バイパス通路、６ 流量調整手段、８ スロットルバルブ、９ 吸入弁、１０ 点火プラグ、１１ 排気弁、１２ インジェクタ、１３ 過給機、１４ 電動機、１５ 排気タービン、１６ 制御装置、１８ シリンダ。   DESCRIPTION OF SYMBOLS 1 Engine, 2, 4, 17 Intake passage, 5 Bypass passage, 6 Flow rate adjustment means, 8 Throttle valve, 9 Intake valve, 10 Spark plug, 11 Exhaust valve, 12 Injector, 13 Supercharger, 14 Electric motor, 15 Exhaust turbine , 16 controller, 18 cylinders.

Claims (4)

内燃機関の吸気通路に配置された過給機と、
前記過給機を駆動する電動機と、
前記過給機の上流側の吸気通路と前記過給機の下流側の吸気通路とを連通させて、前記過給機をバイパスするバイパス通路と、
前記バイパス通路を通過する空気流量を調整する流量調整手段と、
前記電動機および前記流量調整手段を制御する制御装置と、
前記制御装置に入力される過給機供給電力を検出する電力検出手段と
を備え、
前記制御装置は、あらかじめ定められた電力基準値と前記過給機供給電力とを比較し、前記過給機供給電力が前記電力基準値を下回った場合に、前記流量調整手段を開放制御することを特徴とする内燃機関の電動過給機制御装置。 A supercharger disposed in the intake passage of the internal combustion engine;
An electric motor for driving the supercharger;
A bypass passage that bypasses the supercharger by communicating the intake passage on the upstream side of the supercharger and the intake passage on the downstream side of the supercharger;
A flow rate adjusting means for adjusting a flow rate of air passing through the bypass passage;
A control device for controlling the electric motor and the flow rate adjusting means;
Power detection means for detecting the supercharger supply power input to the control device,
The control device compares a predetermined power reference value and the supercharger supply power, and controls the opening of the flow rate adjusting means when the supercharger supply power falls below the power reference value. An electric supercharger control device for an internal combustion engine. 前記過給機の下流側の第１の吸入空気量を検出する第１の吸入空気量検出手段を備え、
前記制御装置は、前記過給機供給電力と前記第１の吸入空気量とに応じて前記流量調整手段を制御することを特徴とする請求項１に記載の内燃機関の電動過給機制御装置。 A first intake air amount detection means for detecting a first intake air amount downstream of the supercharger;
2. The electric supercharger control device for an internal combustion engine according to claim 1, wherein the control device controls the flow rate adjusting means according to the supercharger supply power and the first intake air amount. . 前記バイパス通路を経由する第２の吸入空気量を検出する第２の吸入空気量検出手段を備え、
前記制御装置は、前記過給機供給電力と前記第１および第２の吸入空気量とに応じて、流量調整手段を制御することを特徴とする請求項２に記載の内燃機関の電動過給機制御装置。 A second intake air amount detecting means for detecting a second intake air amount passing through the bypass passage;
3. The electric supercharging of the internal combustion engine according to claim 2, wherein the control device controls a flow rate adjusting unit according to the supercharger supply power and the first and second intake air amounts. 4. Machine control device. 前記過給機の下流側の空気圧を過給圧として検出する過給圧検出手段を備え、
前記制御装置は、前記過給機供給電力と前記過給圧とに応じて前記流量調整手段を制御することを特徴とする請求項１に記載の内燃機関の電動過給機制御装置。 A supercharging pressure detecting means for detecting an air pressure downstream of the supercharger as a supercharging pressure;
2. The electric supercharger control device for an internal combustion engine according to claim 1, wherein the control device controls the flow rate adjusting means in accordance with the supercharger supply power and the supercharging pressure.
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