VEHICLE CONTROL UNIT AND VEHICLE CONTROL METHOD

• Main Authors: HAREYAMA YOHEI, KONDO MASAMITSU, YOKOGAWA TAKAHIRO
• Format: Patent
• Language: English; Japanese
• Published: 04.04.2016
• Subjects: BLASTING; BRAKES; CLUTCHES; COUPLINGS FOR TRANSMITTING ROTATION; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a vehicle control unit and a vehicle control method capable of suppressing a driver from feeling that a brake force is insufficient when the driver decelerates a vehicle during free running.SOLUTION: In vehicle control processing in one embodiment of the present invention, an ECU 200 increases the increase rate of a target turbine rotating speed Nttgt when the negative pressure of a brake booster 73 is low as compared with a case in which the negative pressure is high, thereby increasing the increase rate of clutch torque Tc. It is thereby possible to suppress a driver from feeling that a brake force is insufficient when the driver operates a brake pedal 71 during free running. If the brake force possibly falls short of a target value even by increasing the increase rate of the clutch torque Tc, a CVT 5 may be downshifted. By downshifting the CVT 5, the rotating speed of the CVT 5 increases and the inertial torque thereof can be added to the brake force.SELECTED DRAWING: Figure 1 【課題】フリーラン走行時に運転者が減速操作した際、運転者が制動力の不足を感じることを抑制可能な車両制御装置及び車両制御方法を提供すること。【解決手段】本発明の一実施形態である車両制御処理では、ＥＣＵ２００が、ブレーキブースタ７３の負圧が小さい場合は大きい場合よりも目標タービン回転数Ｎｔｔｇｔの増加率を大きくすることによって、クラッチトルクＴｃの増加率を大きくする。これにより、フリーラン走行時に運転者がブレーキペダル７１を操作した際、運転者が制動力の不足を感じることを抑制できる。なお、クラッチトルクＴｃの増加率を大きくしても制動力が目標値に対して不足しそうな場合には、ＣＶＴ５をダウンシフトさせてもよい。ＣＶＴ５をダウンシフトさせることによって、ＣＶＴ５の回転数が上昇し、そのイナーシャトルク分を制動力に上乗せできる。【選択図】図１