公开(公告)号：US20230219618A1

公开(公告)日：2023-07-13

申请号：US18067487

申请日：2022-12-16

申请人： Toyota Jidosha Kabushiki Kaisha ,  JTEKT CORPORATION ,  DENSO CORPORATION

发明人： Takahito ISHINO ,  Masaharu YAMASHITA ,  Kenji SHIBATA ,  Yosuke YAMASHITA ,  Shintaro TAKAYAMA ,  Kazuaki IIDA ,  Ryo YAMAZAKI ,  Yuuta KAJISAWA ,  Kenichi ABE ,  Toyohiro HAYASHI ,  Nobuyori NAKAJIMA ,  Hiroyasu OTAKE ,  Kurumi TAZUKE ,  Hiroki TOMIZAWA

IPC分类号： B62D5/04 ,  H02P29/68 ,  H02P23/14

CPC分类号： B62D5/0496 ,  B62D5/046 ,  H02P29/68 ,  H02P23/14

摘要： A steer-by-wire steering system including a steering device including a steering motor and a controller configured to supply a steering current to the steering motor based on a steering request. The controller includes a plurality of microcomputers, a plurality of drive circuits, and a plurality of temperature sensors. When a detection temperature difference that is a difference between detection temperatures of any two of the plurality of temperature sensors is greater than a predetermined threshold, each of the plurality of microcomputers executes an independent calculation control to independently calculate and set a current limit value, which is an upper limit value of the steering current, based on a detection temperature of one of the plurality of temperature sensors corresponding to itself, irrespective of detection temperatures of one or more of the plurality of temperature sensors other than the one of the plurality of temperature sensors corresponding to itself.