JP2015033912A - Hybrid system and control method thereof - Google Patents
Hybrid system and control method thereof Download PDFInfo
- Publication number
- JP2015033912A JP2015033912A JP2013165687A JP2013165687A JP2015033912A JP 2015033912 A JP2015033912 A JP 2015033912A JP 2013165687 A JP2013165687 A JP 2013165687A JP 2013165687 A JP2013165687 A JP 2013165687A JP 2015033912 A JP2015033912 A JP 2015033912A
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- Prior art keywords
- motor generator
- internal combustion
- combustion engine
- hybrid system
- motor
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000002485 combustion reaction Methods 0.000 claims abstract description 32
- 230000005540 biological transmission Effects 0.000 claims description 23
- 230000001172 regenerating effect Effects 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
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Classifications
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- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- 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
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
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Abstract
Description
本発明はハイブリッドシステム及びその制御方法に関し、更に詳しくは、内燃機関を容易に始動させることができるハイブリッドシステム及びその制御方法に関する。 The present invention relates to a hybrid system and a control method thereof, and more particularly, to a hybrid system and a control method thereof that can easily start an internal combustion engine.
近年、燃費向上と環境対策などの観点から、バッテリに接続する電動発電機により、エンジンの駆動力をアシストするとともに車両のエネルギー回生を行うハイブリッド車両が注目されている(例えば、特許文献1を参照)。 In recent years, a hybrid vehicle that assists the driving force of an engine and regenerates the energy of the vehicle by a motor generator connected to a battery has been attracting attention from the viewpoint of improving fuel efficiency and environmental measures (see, for example, Patent Document 1). ).
このハイブリッド車両においては、省エネルギー及び省スペースを目的として、従来のスターターを廃止して、電動発電機機を用いてエンジンをクランキングすることが提案されている。 In this hybrid vehicle, for the purpose of energy saving and space saving, it has been proposed to abandon the conventional starter and crank the engine using a motor generator.
しかしながら、極低温時などでエンジン本体のフリクションが増大している場合においてエンジンを確実に始動させるためには、クランク軸に対してクランキングに必要な大きさのトルクを与える必要がある。 However, in order to start the engine reliably when the friction of the engine main body is increasing, for example, at a very low temperature, it is necessary to give the crankshaft a torque necessary for cranking.
このようなことから、極低温時においてもハイブリッドシステムの内燃機関を容易に始動できるようにすることが求められている。 For this reason, it is required to easily start the internal combustion engine of the hybrid system even at extremely low temperatures.
本発明の目的は、内燃機関を容易に始動させることができるハイブリッドシステム及びその制御方法を提供することにある。 An object of the present invention is to provide a hybrid system capable of easily starting an internal combustion engine and a control method therefor.
上記の目的を達成する本発明のハイブリッドシステムは、内燃機関と電動発電機とを有するハイブリッドシステムにおいて、前記内燃機関のクランク軸に直結して無段変速機構を設けて該無段変速機構に第1の電動発電機を連結するとともに、前記第1の電動発電機に第2の電動発電機を電動機用断接装置を介して直列に連結し、前記内燃機関の温度を測定する温度計と、前記ハイブリッドシステム及び前記電動機用断接装置を制御する制御手段とを設け、前記制御手段は、前記内燃機関の始動要求が発生したときには、前記温度計の測定値が予め設定されたしきい値以下の場合には前記電動機用断接装置を接状態にして、前記第1の電動発電機及び前記第2の電動発電機を用いて前記内燃機関をクランキングすることを特徴とするものである。 The hybrid system of the present invention that achieves the above object is a hybrid system having an internal combustion engine and a motor generator, and is provided with a continuously variable transmission mechanism that is directly connected to the crankshaft of the internal combustion engine. A thermometer for connecting a first motor generator, connecting a second motor generator in series to the first motor generator via a motor connecting / disconnecting device, and measuring the temperature of the internal combustion engine; And a control means for controlling the hybrid system and the motor connecting / disconnecting device, wherein the control means has a measured value of the thermometer equal to or lower than a preset threshold value when a request for starting the internal combustion engine is generated. In this case, the internal combustion engine is cranked using the first motor generator and the second motor generator with the motor connecting / disconnecting device in a contact state. .
上記の目的を達成する本発明のハイブリッドシステムの制御方法は、内燃機関と電動発電機とを有するハイブリッドシステムの制御方法において、前記内燃機関のクランク軸に直結して無段変速機構を設けて該無段変速機構に第1の電動発電機を連結するとともに、前記第1の電動発電機に第2の電動発電機を直列に連結し、前記内燃機関の始動要求が発生したときには、前記内燃機関の温度が予め設定されたしきい値以下である場合には前記第1の電動発電機と前記第2の電動発電機の動力伝達を可能にして前記内燃機関をクランキングすることを特徴とするものである。 The hybrid system control method of the present invention that achieves the above object is a hybrid system control method having an internal combustion engine and a motor generator, wherein a continuously variable transmission mechanism is provided directly connected to the crankshaft of the internal combustion engine. A first motor generator is connected to the continuously variable transmission mechanism, and a second motor generator is connected in series to the first motor generator. When a request for starting the internal combustion engine occurs, the internal combustion engine When the temperature of the engine is equal to or lower than a preset threshold value, the internal combustion engine is cranked by enabling power transmission between the first motor generator and the second motor generator. Is.
本発明のハイブリッドシステム及びその制御方法によれば、電動発電機に別の電動発電機を電動機用断接装置を介して直列に連結して、内燃機関の始動時において内燃機関の状態に応じて1台又は2台の電動発電機によりクランキングするようにしたので、内燃機関を容易に始動させることができる。 According to the hybrid system and the control method thereof of the present invention, another motor generator is connected to the motor generator in series via the motor connecting / disconnecting device, and the internal combustion engine is started according to the state of the internal combustion engine. Since the cranking is performed by one or two motor generators, the internal combustion engine can be easily started.
以下に、本発明の実施の形態について、図面を参照して説明する。図1は、本発明の実施形態からなるハイブリッドシステムを示す。 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a hybrid system according to an embodiment of the present invention.
この実施の形態のハイブリッドシステム1は、エンジン(内燃機関)10と電動発電機(M/G)21を有している。なお、ここでは、このハイブリッドシステム1はハイブリッド車両(HEV:以下車両とする)2に搭載されているものとして説明するが、必ずしも限定されるものではない。 The hybrid system 1 of this embodiment includes an engine (internal combustion engine) 10 and a motor generator (M / G) 21. Here, the hybrid system 1 is described as being mounted on a hybrid vehicle (HEV: hereinafter referred to as a vehicle) 2, but is not necessarily limited.
ハイブリッドシステム1は、エンジン10と排気通路12とターボ過給器13と、排気通路12に設けられた排気ガス浄化装置(後処理装置)14を備えている。
The hybrid system 1 includes an
エンジン本体11のクランク軸15に連結してCVT(無段変速機構:レシオ可変機構)16を設けるとともに、このCVT16に第1電動発電機21Aを連結する。つまり、エンジン10のクランク軸15にCVT16の第1プーリー16aを直結するとともに、第1電動発電機21AにCVT16の第2プーリー16bを設けて構成し、第1プーリー16aと第2プーリー16bとを介してクランク軸15と第1電動発電機21Aとの間の動力伝達を行うように構成する。
A CVT (continuously variable transmission mechanism: ratio variable mechanism) 16 is provided connected to the
これらの第1プーリー16aと第2プーリー16bとの間には無端状のベルト又はチェーン(動力伝達部材)16cが掛け回されており、クランク軸15から第1プーリー16aと動力伝達部材16cと第2プーリー16bを経由して第1電動発電機21Aに、また逆に、第1電動発電機21Aから第2プーリー16bと動力伝達部材16cと第1プーリー16aを経由してクランク軸15に、それぞれ動力が伝達される。
An endless belt or chain (power transmission member) 16c is hung between the
このCVT16では、第1プーリー16aと第2プーリー16bの幅をそれぞれ変化させることにより、プーリー16a、16bと動力伝達部材16cの接する径方向位置を変えるようにしており、動力伝達部材16cの接する位置が内側になればプーリー径が小さくなり、逆に外側になればプーリー径が大きくなるように構成されている。そして、電子制御による油圧又は電動機構(図示しない)で2個のプーリー16a、16bの幅の拡縮が互いに逆になるように変化させる制御をすることにより、動力伝達部材16cをたるませることなく、変速を連続的に行うことができる。
In this
電力システム20の一部である第1電動発電機21Aには、電動発電機用クラッチ27を介して第2電動発電機21Bが直列に接続している。これらのうち第1電動発電機は常に、第2電動発電機は電動発電機用クラッチ27が接状態のときに、発電機として、エンジン10の駆動力を受けて発電をしたり、又は、車両2のブレーキ力等の回生力発生による回生発電をしたり、モータとして駆動して、その駆動力をエンジン10のクランク軸15に伝達して、エンジン10の駆動力をアシストしたりする。
A
なお、発電して得た電力は、配線22を経由してインバータ(INV)23で変換して第1バッテリ(充電器:B1)24Aに充電される。また、第1電動発電機21Aを駆動するときは、第1バッテリ24Aに充電された電力をインバータ23で変換して第1電動発電機21Aに供給する。
The electric power generated by the power generation is converted by the inverter (INV) 23 via the
図1の構成では、更に、DC−DCコンバータ(CON)25と第2バッテリ(B2)24Bを第1バッテリ24Aに直列に設けて、第1バッテリ24Aの、例えば、一般的な12Vや24V以上の高い電圧の電力を、DC−DCコンバータ25で、例えば、12Vに電圧降下させて、第2バッテリ24Bに充電して、この第2バッテリ24Bから補機の冷却ファン26A、冷却水ポンプ26B、潤滑油ポンプ26C等に電力を供給するように構成している。
In the configuration of FIG. 1, a DC-DC converter (CON) 25 and a second battery (B2) 24B are further provided in series with the
ハイブリッドシステム1を搭載した車両2においては、エンジン10の動力は、動力伝達システム30の変速機(トランスミッション)31に伝達され、さらに、変速機31より推進軸(プロペラシャフト)32を介して作動装置(デファレンシャルギア)33に伝達され、作動装置33より駆動軸(ドライブシャフト)34を介して車輪35に伝達される。これにより、エンジン10の動力が車輪35に伝達され、車両2が走行する。なお、エンジン10の搭載方式によっては、動力伝達システムの伝達経路は異なってもよい。
In the vehicle 2 equipped with the hybrid system 1, the power of the
一方、第1電動発電機21A及び第2電動発電機21Bの動力に関しては、第1バッテリ24Aに充電された電力がインバータ23を介して第1電動発電機21A及び第2電動発電機21Bに供給され、この電力により第1電動発電機21A及び第2電動発電機21Bが駆動され動力を発生する。この第1電動発電機21A及び第2電動発電機21Bの動力は、CVT16を介してクランク軸15に伝達されて、エンジン10の動力伝達経路を伝達して、車輪35に伝達される。
On the other hand, regarding the power of the
これにより、第1電動発電機21A及び第2電動発電機21Bの動力がエンジン10の動力と共に車輪35に伝達され、車両2が走行する。なお、回生時には、逆の経路で、車輪35の回生力、又はエンジン10の回生力が第1電動発電機21A及び第2電動発電機21Bに伝達されて、第1電動発電機21A及び第2電動発電機21Bでの発電が可能となる。
Thus, the power of the
また、ハイブリッドシステム用制御装置41が設けられ、エンジン10の回転数Neや負荷Q等の運転状態や第1電動発電機21A及び第2電動発電機21Bの回転数Na等の運転状態や第1バッテリ24A,第2バッテリ24Bの充電容量(SOC)の状態をモニターしながら、CVT16や第1電動発電機21A及び第2電動発電機21B、インバータ23、DC−DCコンバータ25等を制御する。このハイブリッドシステム用制御装置41は、通常は、エンジン10や車両2を制御する全体制御装置40に組み込まれて構成される。この全体制御装置40は、エンジン10の制御では、シリンダ内燃焼やターボ過給器13や排気ガス浄化装置14や補機の冷却ファン26A、冷却水ポンプ26B、潤滑油ポンプ26Cなどを制御している。
Also, a hybrid
更に、車両2には、エンジン本体11の温度を測定する温度計42が設置されている。この温度計42が測定するエンジン本体11の温度としては、エンジン用冷却水の水温などが例示される。 Further, the vehicle 2 is provided with a thermometer 42 that measures the temperature of the engine body 11. Examples of the temperature of the engine body 11 measured by the thermometer 42 include the coolant temperature of engine cooling water.
このようなハイブリッドシステム1を搭載した車両2における制御方法を図2に基づいて以下に説明する。 A control method in the vehicle 2 equipped with such a hybrid system 1 will be described below with reference to FIG.
ハイブリッドシステム用制御装置41は、エンジン本体11の始動要求(アイドリングストップ時の再始動要求も含む)が発せられたかを判定し(S10)、始動要求が発せられたときには、温度計42の測定値Tを入力し(S20)、測定値Tがあらかじめ設定されたしきい値超であるかを判定する(S30)。このしきい値としては、−20〜10℃の範囲の温度値、好ましくは0℃が例示される。
The hybrid
そして、測定値Tがしきい値超である場合には、電動発電機用クラッチ27を断状態にして(S40)、第1バッテリ24Aから第1電動発電機21Aのみに電力を供給することで回転駆動させて(S50)、CVT16を通じてクランク軸15を強制回転させてエンジン本体11をクランキングする(S60)。
If the measured value T exceeds the threshold value, the motor generator clutch 27 is disengaged (S40), and power is supplied only from the
一方、測定値Tがしきい値以下である場合には、電動発電機用クラッチ27を接状態にして(S70)、第1バッテリ24Aから第1電動発電機21A及び第2電動発電機21Bに電力を供給することで両者を回転駆動させて(S80)、CVT16を通じてクランク軸15を強制回転させてエンジン本体11をクランキングする(S60)。
On the other hand, when the measured value T is less than or equal to the threshold value, the motor generator clutch 27 is brought into the engaged state (S70), and the
このような制御を行うことにより、極低温時などでエンジン本体11のフリクションが増大している場合には、2台の電動発電機21A、21Bによりクランク軸15を回転させてクランキングするので、エンジン本体11を容易に始動させることができる。
By performing such control, when the friction of the engine body 11 is increased at a very low temperature or the like, the
1 ハイブリッドシステム
2 ハイブリッド車両
10 エンジン
11 エンジン本体
15 クランク軸
16 CVT
16a 第1プーリー
16b 第2プーリー
17 クランク軸用断接装置
21A 第1電動発電機
21B 第2電動発電機
27 電動発電機用クラッチ
41 ハイブリッドシステム用制御装置
42 温度計
DESCRIPTION OF SYMBOLS 1 Hybrid system 2
Claims (4)
前記内燃機関のクランク軸に直結して無段変速機構を設けて該無段変速機構に第1の電動発電機を連結するとともに、前記第1の電動発電機に第2の電動発電機を電動機用断接装置を介して直列に連結し、
前記内燃機関の温度を測定する温度計と、前記ハイブリッドシステム及び前記電動機用断接装置を制御する制御手段とを設け、
前記制御手段は、前記内燃機関の始動要求が発生したときには、前記温度計の測定値が予め設定されたしきい値以下の場合には前記電動機用断接装置を接状態にして、前記第1の電動発電機及び前記第2の電動発電機を用いて前記内燃機関をクランキングすることを特徴とするハイブリッドシステム。 In a hybrid system having an internal combustion engine and a motor generator,
A continuously variable transmission mechanism is provided directly connected to the crankshaft of the internal combustion engine, a first motor generator is connected to the continuously variable transmission mechanism, and a second motor generator is connected to the first motor generator. Connected in series via a connecting / disconnecting device,
A thermometer for measuring the temperature of the internal combustion engine, and a control means for controlling the hybrid system and the motor connecting / disconnecting device;
When a request for starting the internal combustion engine is generated, the control means sets the motor connecting / disconnecting device in a contact state when the measured value of the thermometer is equal to or less than a preset threshold value. A hybrid system characterized in that the internal combustion engine is cranked using the motor generator and the second motor generator.
前記内燃機関のクランク軸に直結して無段変速機構を設けて該無段変速機構に第1の電動発電機を連結するとともに、前記第1の電動発電機に第2の電動発電機を直列に連結し、
前記内燃機関の始動要求が発生したときには、前記内燃機関の温度が予め設定されたしきい値以下である場合には前記第1の電動発電機と前記第2の電動発電機の動力伝達を可能にして前記内燃機関をクランキングすることを特徴とするハイブリッドシステムの制御方法。 In a control method of a hybrid system having an internal combustion engine and a motor generator,
A continuously variable transmission mechanism is provided directly connected to the crankshaft of the internal combustion engine, a first motor generator is connected to the continuously variable transmission mechanism, and a second motor generator is connected in series to the first motor generator. Connected to
When a request for starting the internal combustion engine is generated, power can be transmitted between the first motor generator and the second motor generator if the temperature of the internal combustion engine is equal to or lower than a preset threshold value. A control method for a hybrid system, wherein the internal combustion engine is cranked.
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