公开(公告)号：US10443526B2

公开(公告)日：2019-10-15

申请号：US15670037

申请日：2017-08-07

Applicant: DENSO CORPORATION

Inventor： Tomohiro Kohara ,  Yoshiyuki Kawase ,  Kazunori Kurokawa

IPC: F02D41/14 ,  G01N27/12 ,  F02D41/28

Abstract: An air-fuel ratio sensing device includes a resistor, an A/D converter, a parallel circuit unit, a second switch, a controlling unit, an air-fuel ratio sensing unit, and a deterioration sensing unit. The controlling unit controls to turn off the first switch and controls to turn on the second switch in a first interval, and the controlling unit controls to turn on the first switch and controls to turn off the second switch in a second interval. The air-fuel ratio sensing unit senses an air-fuel ratio based on a converting result of the A/D converter in the first interval. The deterioration sensing unit compares a reference value with a value obtained based on the converting result and senses a deterioration generated in the current sensing circuit unit in the second interval.

公开(公告)号：US09722485B2

公开(公告)日：2017-08-01

申请号：US14548356

申请日：2014-11-20

Applicant: DENSO CORPORATION

Inventor： Yuki Mikami ,  Yoshiyuki Kawase ,  Toru Itabashi

IPC: B60R16/03 ,  H02M1/088 ,  H02M1/32 ,  H02M3/335 ,  H02M3/158

CPC classification number: H02M1/32 ,  H02M3/1582

Abstract: A switching power supply device includes a switching circuit and a control circuit. The switching circuit includes multiple switching elements, an inductor, and a capacitor. The control circuit compares an input voltage of the switching circuit with a predetermined threshold voltage set for an operation switch, and controls the switching circuit to perform the operation switch between at least two power control operations based on a comparison result. The at least two power control operations includes at least two of a buck operation, a buck-boost operation, or a boost operation. The control circuit further performs an inrush current restriction operation in response to the operation switch in order to restrict a flowing of an inrush current to one of the switching elements, which turns on and outputs the input voltage through the inductor in response to the operation switch.

公开(公告)号：US09531268B2

公开(公告)日：2016-12-27

申请号：US14548339

申请日：2014-11-20

Applicant: DENSO CORPORATION

Inventor： Yuki Mikami ,  Yoshiyuki Kawase ,  Ryoichi Shiraishi

IPC: H02H3/06 ,  H02M3/156 ,  H02H7/12 ,  H02M1/32 ,  H02H3/087

CPC classification number: H02M3/156 ,  H02H3/087 ,  H02H7/1213 ,  H02M1/32

Abstract: A switching power supply converts an input voltage to a predetermined output voltage by controlling a switching device. The switching power supply includes a controller and a current detector. The controller controls the switching device. The current detector detects electric current flowing through the switching device. The controller starts a forced-OFF action to forcedly turn OFF the switching device when the current detected by the current detector exceeds a predetermined threshold and then ends the forced-OFF action at a start of a predetermined switching period.

Abstract translation: 开关电源通过控制开关装置将输入电压转换为预定的输出电压。 开关电源包括控制器和电流检测器。 控制器控制开关装置。 电流检测器检测流过开关装置的电流。 当由电流检测器检测到的电流超过预定阈值时，控制器开始强制关闭动作，强制关闭开关装置，然后在预定的开关周期的开始结束强制关闭动作。