PROBLEM TO BE SOLVED: To provide a vehicle-start creep-down prevention control apparatus capable of limiting discomfort caused to a driver.SOLUTION: During a start operation (initially, a motor torque instruction value TTMA=TTMA0) in which an accelerator opening degree APO (a target motor torque basic value TTMA0) is increased as shown in Figure after an instantaneous time t1 in the state of D range stop in the midst of charging limitation, if a vehicle speed VSP≤-0.5 km/h continues for 0.1 sec (i.e., creep-down is determined), creep-down prevention control is started (flag_RSAON=1). That is, while the TTMA is decreased at a constant change rate β1 to be reduced to zero (0) at t3, while a vehicle-start creep-down preventing-braking torque instruction value TTBRK (a brake hydraulic pressure instruction value TPMC) is increased at a constant change rate α1 so as to become the same torque value as TTMA0 so as to prevent a creep-down using a frictional braking instead of a regenerative braking.
【課題】運転者に違和感を与えることを抑制できる車両の発進時ずり下がり防止制御装置を提供する。【解決手段】充電制限中のDレンジ停車状態で瞬時t1以降、アクセル開度APO(目標モータトルク基本値TTMA0)を図示のごとく増大させて行う発進操作中(当初はモータトルク指令値TTMA=TTMA0)、車両速度VSP≰-0.5km/hが0.1sec継続する(ずり下がり判定時)t2に、ずり下がり防止制御を開始する(flag_RSAON=1)。つまり、一方でTTMAを一定変化率β1で低下させ、t3に0となし、他方で発進時ずり下がり防止用ブレーキトルク指令値TTBRK(ブレーキ液圧指令値TPMC)を一定変化率α1で、TTMA0と同じトルク値となるよう増大させ、回生制動に代えて摩擦制動により「ずり下がり」を防止する。【選択図】図11
VEHICLE-START CREEP-DOWN PREVENTION CONTROL APPARATUS
車両の発進時ずり下がり防止制御装置
2015-11-12
Patent
Electronic Resource
Japanese