HYBRID AUTOMOBILE

• Main Authors: NAKAO MASARU, KOBAYASHI TOSHIYA, AOKI TAKANORI, INAOKA KOTARO, FUJIWARA YASUYUKI
• Format: Patent
• Language: English; Japanese
• Published: 14.12.2017
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT; TRANSPORTING; VEHICLES IN GENERAL

PROBLEM TO BE SOLVED: To prevent torque exceeding endurance of a one-way clutch from being input thereto.SOLUTION: In a hybrid automobile in which a rotary shaft of a motor MG1, a crank shaft of an engine and a drive shaft are connected to a sun gear, a carrier and a ring gear of a planetary gear, respectively, and a motor MG2 is connected to the drive shaft, a one-way clutch is disposed for inhibiting a negative rotation of the crank shaft. Further, as a control mode of the engine and motors MG1, MG2, a two-MG drive mode is provided for performing drive control so that operation of the engine is stopped and power corresponding to required power is output from the motors MG1, MG2 to the drive shaft. Then, during the two-MG drive mode, torque to be input to the one-way clutch is estimated on the basis of a sum of engine inertia torque T1 and torque T2 that torque from the motor MG1 acts on the carrier, and in the case when the estimated torque is predicted to be a threshold Tref or greater, the two-MG drive mode is cancelled.SELECTED DRAWING: Figure 3 【課題】ワンウェイクラッチに耐久を超える過大なトルクが入力されるのを防止する。【解決手段】プラネタリギヤのサンギヤ，キャリア，リングギヤにそれぞれモータＭＧ１の回転軸，エンジンのクランクシャフト，駆動軸が接続され、駆動軸にモータＭＧ２が接続されたものにおいて、クランクシャフトの負回転を禁止するワンウェイクラッチを設ける。また、エンジンとモータＭＧ１，ＭＧ２の制御モードとして、エンジンの運転を停止してモータＭＧ１，ＭＧ２から要求動力に見合う動力を駆動軸に出力するよう駆動制御するＭＧ両駆動モードを設ける。そして、ＭＧ両駆動モード中に、エンジン慣性トルクＴ１とモータＭＧ１からのトルクがキャリアに作用するトルクＴ２との和に基づきワンウェイクラッチに入力されるトルクを推定し、推定したトルクが閾値Ｔｒｅｆ以上となると予測される場合に、ＭＧ両駆動モードをキャンセルする。【選択図】図３