公开(公告)号：US09614513B2

公开(公告)日：2017-04-04

申请号：US14288464

申请日：2014-05-28

申请人： DENSO CORPORATION

发明人： Shigenori Yamauchi ,  Takamoto Watanabe ,  Nobuyuki Taguchi

IPC分类号： H03K7/08 ,  G01C19/5726

CPC分类号： H03K7/08 ,  G01C19/5726

摘要： In a gyro sensor, a TDC detects a magnitude of vibration of a vibrator. A drive circuit (excluding the TDC) determines a duty ratio of a PWM drive signal in accordance with the magnitude of vibration so that the magnitude of vibration becomes a predetermined magnitude and outputs the PWM drive signal having the determined duty ratio. The drive circuit (excluding the TDC) includes a control circuit and a DCO. The control circuit measures time corresponding to the control value by using a gate delay time, generates the PWM drive signal having a pulse width corresponding to the control value and outputs the PWM drive signal.

公开(公告)号：US10006433B2

公开(公告)日：2018-06-26

申请号：US15500659

申请日：2015-07-27

申请人： DENSO CORPORATION ,  MITSUBISHI HEAVY INDUSTRIES, LTD.

发明人： Kenji Kanehara ,  Naoki Kido ,  Akimitsu Sugiura ,  Nobuyuki Taguchi ,  Ryu Suzuki ,  Akihiro Yuuki ,  Minoru Ichihara ,  Tomohiro Noguchi

IPC分类号： F02P23/04 ,  F02B19/10

CPC分类号： F02P23/04 ,  F02B19/1095 ,  F02B19/12 ,  F02P9/007 ,  F02P13/00 ,  Y02T10/125

摘要： In a laser ignition device which is mounted in an internal combustion engine and at least includes a laser spark plug equipped with an optical window which protects an optical device from high temperature and high pressure generated in a combustion chamber and a prechamber cap equipped with a cylindrical prechamber, a prechamber throat portion that is a bottomed cylinder with a sectional area smaller than that of the prechamber, and a plurality of prechamber spray holes which communicate with a combustion chamber on a side of a closed end of the prechamber throat portion, the prechamber cap is arranged between the optical window and the combustion chamber. A converging point FP is located inside the prechamber to ignite an air-fuel mixture delivered into the prechamber, thereby jetting combustion flames from the prechamber into the combustion chamber to fire the internal combustion engine. The center axis AXF of the prechamber is oriented horizontally eccentrically from the center axis AXS of the prechamber throat portion.

公开(公告)号：US09964928B2

公开(公告)日：2018-05-08

申请号：US14817271

申请日：2015-08-04

申请人： DENSO CORPORATION

发明人： Shigenori Yamauchi ,  Takamoto Watanabe ,  Nobuyuki Taguchi

IPC分类号： G04F10/00 ,  G04F10/10

CPC分类号： G04F10/005 ,  G04F10/105

摘要： A first encoding part encodes a reference timing determined by a reference clock by using a delay line. A second encoding part encodes a measurement start timing and a measurement end timing of a measurement period determined by a measurement signal to be measured by also using the delay line. A count part counts the reference clocks included in the measurement period. A fraction calculation part calculates a start fraction number indicating a time difference from the measurement start timing and an immediately-following reference timing and an end fraction number indicating a time difference from the measurement end timing to an immediately-following reference timing, based on the encoding result. The fraction calculation part then calculates a fraction data indicating a difference between the measurement period and a product of the period of the reference timing and the count value of the count part.

公开(公告)号：US09667262B2

公开(公告)日：2017-05-30

申请号：US15189017

申请日：2016-06-22

申请人： DENSO CORPORATION

发明人： Shigenori Yamauchi ,  Nobuyuki Taguchi ,  Takamoto Watanabe

IPC分类号： H03K3/03 ,  H03L7/099 ,  H03L7/091 ,  H03L7/197 ,  H03K23/50 ,  G06F1/12 ,  H03K23/42 ,  H03K5/135 ,  G04F10/00

CPC分类号： H03L7/0997 ,  G04F10/005 ,  G06F1/12 ,  H03K3/0315 ,  H03K5/135 ,  H03K23/425 ,  H03K23/502 ,  H03L7/091 ,  H03L7/1974

摘要： A digital control oscillator circuit includes: a ring oscillator having delay elements delaying a pulse signal; a counter circuit counting the circulation number of the pulse signal; a rough period generation unit acquiring a period setting value as a magnification ratio for a reference clock, and counting the reference clock using an integer part of the ratio to generate a rough period timing; a fraction conversion unit converting a decimal point part of the ratio into the number of the elements passed by the pulse signal to generate a fraction; and an output processing unit selecting a timing when outputs of the ring oscillator and the counter circuit become values corresponding to the fraction as an output timing when a time corresponding to the fraction has passed after the rough period timing, and generating an output signal oscillating at a period represented by the period setting value according to the output timing.