公开(公告)号：US20180073456A1

公开(公告)日：2018-03-15

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

CPC classification number: F02D41/1456 ,  F02D41/1495 ,  F02D2041/281 ,  G01N27/122

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：US20150162815A1

公开(公告)日：2015-06-11

申请号：US14548356

申请日：2014-11-20

Applicant: DENSO CORPORATION

Inventor： Yuki MIKAMI ,  Yoshiyuki KAWASE ,  Toru ITABASHI

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

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.

Abstract translation: 开关电源装置包括开关电路和控制电路。 开关电路包括多个开关元件，电感器和电容器。 控制电路将开关电路的输入电压与为操作开关设定的预定阈值电压进行比较，并且基于比较结果控制开关电路在至少两个功率控制操作之间执行操作切换。 至少两个功率控制操作包括降压操作，降压 - 升压操作或升压操作中的至少两个。 控制电路还响应于操作开关进行浪涌电流限制操作，以便限制涌入电流流向开关元件之一，该开关元件接通并响应于操作开关输出通过电感器的输入电压 。

公开(公告)号：US20150146328A1

公开(公告)日：2015-05-28

申请号：US14548339

申请日：2014-11-20

Applicant: DENSO CORPORATION

Inventor： Yuki MIKAMI ,  Yoshiyuki KAWASE ,  Ryoichi SHIRAISHI

IPC: H02H5/04 ,  H02M1/08 ,  H02M3/156 ,  H02H7/12

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。