JP2020084979A - 連続可変バルブデュレーション装置を有するエンジンの制御方法 - Google Patents
連続可変バルブデュレーション装置を有するエンジンの制御方法 Download PDFInfo
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- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/004—Aiding engine start by using decompression means or variable valve actuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
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- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
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- F01L1/34409—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear by torque-responsive means
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- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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Abstract
Description
ハイブリッド車は、モータジェネレータの駆動力だけで走行するEVモード、エンジンの駆動力及びモータジェネレータの駆動力で走行するHEVモード、又はエンジンの駆動力だけで走行するエンジン駆動モードのうちのいずれか1つの走行モードで走行することができる。エンジンの駆動が要求される運転条件(HEVモード又はエンジン駆動モード)では、運転手による要求トルクに対応するCVVD値を決定し、決まったCVVD値によって連続可変バルブデュレーション装置を駆動することによってエンジンを始動させる。
この背景技術の部分に記載された事項は、発明の背景に関する理解を増進するために作成されたものであって、この技術が属する分野において通常の知識を有する者に既に知られている従来の技術でない事項を含み得る。
前記同期化CVVD値は、前記ターゲットCVVD値より高く設定され得る。
前記エンジンの現在状態が前記クランキング区間から脱すれば、前記ターゲットCVVD値に対応するターゲット電流値を前記吸気連続可変バルブデュレーション装置の駆動モーターに印加し得る。
補正された前記要求トルクをCVVDマップに代入することによって前記ターゲットCVVD値を決め、前記CVVDマップは、エンジン回転数及びエンジントルクによってマッピングされた前記ターゲットCVVD値を含み得る。
図1に示す通り、本発明の実施例によるハイブリッド車のハイブリッドパワートレーン1は、エンジン2と、モータジェネレータ3と、自動変速器4とを有する。
ハイブリッド車は、HEV又はPHEVであってよい。
エンジン制御機5、モーター制御機6、変速器制御機7は、ハイブリッド制御機8に接続されてよく、ハイブリッド制御機8は、車全体の消費エネルギーを管理し、車を最高効率で走行させるように制御してよい。
図2に示す通り、エンジン2の制御システムは、データ検出部10、カムシャフト位置センサー20、エンジン制御機5、吸気連続可変バルブデュレーション装置(intake continuous variable valve duration apparatus)40、吸気連続可変バルブタイミング装置(intake continuous variable valve timing apparatus)45、及び排気連続可変バルブタイミング装置(exhaust continuous variable valve timing apparatus)55を含む。
データ検出部10は、車速センサー11、エンジン速度センサー12、オイル温度センサー13、冷却水温度センサー16、空気流量センサー14、及び加速ペダル位置センサー15を含む。
車速センサー11は、車のホイールなどに装着され得て車の速度を測定し、当該信号をエンジン制御機5に伝達する。
オイル温度センサー(oil temperature sensor)13は、エンジンオイルの温度を測定し、当該信号をエンジン制御機5に伝達する。
空気流量センサー14は、吸気マニホールドに吸入される空気量を測定し、当該信号をエンジン制御機5に伝達する。
図2に示す本発明の一実施形態によれば、吸気連続可変バルブデュレーション装置(intake CVVD apparatus)40及び吸気連続可変バルブタイミング装置(intake CVVT apparatus)45がエンジン2の吸気側に装着されてよく、排気連続可変バルブタイミング装置(exhaust CVVT apparatus)55がエンジン2の排気側に装着されてよい。
本明細書に記載された様々な実施例は、例えば、ソフトウェア、ハードウェア又はこれらの組み合わせを用いて、コンピューター又はこれと類似する装置で読み取り可能な記録媒体内で具現され得る。
図3に示す通り、本発明の一実施例による連続可変バルブデュレーション装置を有するエンジンの制御方法は、運転手によって要求トルクがハイブリッド制御機8に入力されると、ハイブリッド制御機8が、車の走行モード、ギア変速段(gear position)、エンジンオイルの温度、冷却水の温度、吸入空気量などを用いて要求トルクを補正する(S1)。
例えば、エンジン速度センサーによって測定されたエンジン2の回転数が設定された完爆回転数未満であれば、エンジン2の現在状態がクランキング区間以内である(即ち、エンジン2の始動が完了していない)ものと判断することができ、エンジン速度センサーによって測定されたエンジン2の回転数が設定された完爆回転数以上であれば、エンジン2の現在状態がクランキング区間から脱した(即ち、エンジン2の始動が完了した)ものと判断することができる。
一実施例によれば、同期化CVVD値はターゲットCVVD値より高くてよく、これを通じてエンジン2のクランキング区間での始動回転数を従来の技術の始動回転数より相対的に低くすることにより、その同期化を容易に実現し、始動トルクを増加させ、燃費を改善し得る。
る。
図4に示すように、例えばターゲットCVVD値が226の場合に、ターゲットCVVD値に対応したターゲット電流値を吸気連続可変バルブデュレーション装置40の駆動モーター41に印加した状態でエンジン2を始動する場合には、始動回転数が1280になり得る。これについて、図5に示す通り、CVVD値を236(同期化CVVD値)に増加させる場合には、始動回転数が1220に低くすることができ、これを通じてその同期化が正確かつ容易に実現されるだけでなく、その燃費を改善し得る。
図6に例示するように、ターゲットCVVD値によって吸気連続可変バルブデュレーション装置40が作動することにより、吸気バルブのデュレーションが決まり得る。
したがって、本発明に開示された実施例は、本発明の技術思想を限定するためのものではなく、説明するためのものであって、このような実施例によって本発明の技術思想の範囲が限定されるわけではない。本発明の保護範囲は下記の特許請求の範囲によって解釈されなければならず、それと同等な範囲内にあるすべての技術思想は、本発明の権利範囲に含まれるものと解釈されなければならない。
2 エンジン
3 モータジェネレータ
4 自動変速器
5 エンジン制御機
6 モーター制御機
7 変速器制御機
8 ハイブリッド制御機
9 クラッチ
10 データ検出部
11 車速センサー
12 エンジン速度センサー
13 オイル温度センサー
14 空気流量センサー
15 加速ペダル位置センサー
16 冷却水温度センサー
20 カムシャフト位置センサー
40 吸気連続可変バルブデュレーション装置
45 吸気連続可変バルブタイミング装置
55 排気連続可変バルブタイミング装置
Claims (7)
- ハイブリッド制御機は、
運転手による要求トルクを補正し、
補正された前記要求トルクがエンジンの駆動が要求される条件を満たせば、エンジン制御機側に始動信号を伝達し、
前記補正された要求トルクに対応する吸気連続可変バルブデュレーション装置の作動のためのターゲットCVVD値を決め、
前記ターゲットCVVD値に対応するターゲット電流値を決め、
前記エンジンの現在状態がクランキング区間以内であれば、前記ターゲットCVVD値を同期化CVVD値に変更し、
前記同期化CVVD値は、前記エンジンの始動回転数が自動変速器の回転数及び/又はモータジェネレータの回転数と同期化するように設定されたCVVD値であることを特徴とする連続可変バルブデュレーション装置を有するエンジンの制御方法。 - 前記同期化CVVD値に対応する同期化電流値に変更し、前記同期化電流値を前記吸気連続可変バルブデュレーション装置の駆動モーターに印加することを特徴とする請求項1に記載の連続可変バルブデュレーション装置を有するエンジンの制御方法。
- 前記同期化CVVD値は、前記ターゲットCVVD値より高く設定されることを特徴とする請求項1に記載の連続可変バルブデュレーション装置を有するエンジンの制御方法。
- 前記エンジンの現在状態が前記クランキング区間から脱すれば、前記ターゲットCVVD値に対応するターゲット電流値を前記吸気連続可変バルブデュレーション装置の駆動モーターに印加することを特徴とする請求項1に記載の連続可変バルブデュレーション装置を有するエンジンの制御方法。
- 前記運転手による要求トルクを、車の走行モード、ギア変速段、エンジンオイルの温度、冷却水の温度、及び吸入空気量を用いて補正することを特徴とする請求項1に記載の連続可変バルブデュレーション装置を有するエンジンの制御方法。
- 前記補正された要求トルクをCVVDマップに代入することによって前記ターゲットCVVD値を決め、前記CVVDマップは、エンジン回転数及びエンジントルクによってマッピングされた前記ターゲットCVVD値を含むことを特徴とする請求項1に記載の連続可変バルブデュレーション装置を有するエンジンの制御方法。
- 前記ターゲットCVVD値を電流マップに代入することによってターゲット電流値を決め、前記電流マップは、前記ターゲットCVVD値によってマッピングされた電流値を含むことを特徴とする請求項1に記載の連続可変バルブデュレーション装置を有するエンジンの制御方法。
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