PROBLEM TO BE SOLVED: To set a continuously variable transmission into a rotation state to carry out turning-to-low and to prevent starting rearward at a high gear ratio before start of starting rearward at a time of starting rearward in an electric travel mode.SOLUTION: If it is determined that an operation for selecting an R range is performed in S11, an engine is started in S12 to disengage a continuously variable transmission mechanism (CVT) from wheels by a neutral state of a sub-transmission so as to turn the CVT into a state in which a gear ratio can be shifted. A CVT actual gear ratio is acquired in S13, and a CVT required gear ratio for starting rearward that is a gear ratio as high as possible within a gear ratio range within which driving power can be output to be necessary to enable the CVT to have a gear ratio for starting rearward without causing insufficient driving power in response to engine output by operating an accelerator at engine start from a road surface gradient in a rearward direction is calculated in S14. The gear ratio of the CVT is shifted back to low so as to have the required gear ratio in S15 to S18, the sub-transmission is switched into a rear range gear selecting state in S19, and the engine is torque-controlled to output a torque in response to accelerator operation at start rearward in S20.
【課題】電気走行モードでの後退発進に当たり、後退発進が開始される前に無段変速機を回転状態にしてロー戻し変速させ、後退ハイ発進を防止する。【解決手段】S11でRレンジへのセレクト操作があったと判定する時、S12でエンジンを始動させ、無段変速機構(CVT)を、副変速機の中立状態により車輪から切り離して変速可能状態にする。S13でCVT実変速比を取得し、S14で後退方向路面勾配から、発進時アクセル操作によるエンジン出力を受けてCVTが、駆動力不足を生ずることなく後退発進可能となすのに必要な駆動力を出力可能な変速比領域内のできるだけハイ側の変速比である、後退発進用CVT要求変速比を算出する。S15〜S18でCVTを要求変速比となるようロー戻し変速させ、S19で副変速機を後退変速段選択状態に切り替え、S20で後退発進時アクセル操作に応じたトルクを出力するようエンジンをトルク制御する。【選択図】図3
HYBRID ELECTRIC VEHICLE CONTROL DEVICE
ハイブリッド車両の制御装置
2015-07-16
Patent
Electronic Resource
Japanese
IPC: | B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / F16H Getriebe , GEARING |