公开(公告)号：US11654749B2

公开(公告)日：2023-05-23

申请号：US16233170

申请日：2018-12-27

Applicant: DENSO CORPORATION

Inventor： Kimitake Ishikawa ,  Hideaki Kako ,  Hiroyasu Oide ,  Shiro Bando ,  Hidenori Arai

IPC: B60H1/22 ,  H05B3/00 ,  H05B3/12 ,  B60H1/00 ,  H02H9/02

CPC classification number: B60H1/2218 ,  B60H1/00807 ,  B60H1/22 ,  B60H1/2226 ,  H02H9/02 ,  H05B3/00 ,  H05B3/0023 ,  H05B3/12

Abstract: A heater control device controls an electric heater which includes a plurality of heat generating portions. The heater control device determines whether a total energization current value, which is a current value to be supplied to the electric heater when all of the plurality of heat generating portions are energizable, exceeds a predetermined current limit value. The heater control device is configured to, when it is determined that the total energization current value exceeds the current limit value, energize the electric heater while switching, among any or all of the plurality of heat generating portions, those to be turned to a non-energizable off state.