公开(公告)号：US20220326058A1

公开(公告)日：2022-10-13

申请号：US17847626

申请日：2022-06-23

Applicant: DENSO CORPORATION

Inventor： Hiroyuki AKUZAWA ,  Taichi WATANABE ,  Amane HIGASHI

IPC: G01F1/72 ,  G01F1/69

Abstract: A measurement control device includes: a sensing unit that outputs a signal according to an air flow rate; a pulsation state calculation unit that calculates a pulsation state of pulsation generated in the air flow rate using an output value of the sensing unit; and a pulsation error correction unit that corrects the air flow rate. The pulsation state calculation unit has an upper extreme value determination unit and a frequency calculation unit. The upper extreme value determination unit cancels the upper extreme value that has presently appeared, when the output value remains to be more than a predetermined lower threshold. The upper extreme value determination unit updates the lower threshold on a basis of at least one of air flow rate, pulsation frequency, or pulsation amplitude specified on the basis of the output value.

公开(公告)号：US20230009483A1

公开(公告)日：2023-01-12

申请号：US17944562

申请日：2022-09-14

Applicant: DENSO CORPORATION

Inventor： Taichi WATANABE ,  Hiroyuki AKUZAWA ,  Amane HIGASHI

IPC: G01F15/02 ,  F02M35/10

Abstract: A measurement control device includes a sensing unit and a low-pass filter unit. The sensing unit outputs an air flow rate value corresponding to an air flow rate flowing through a flow path. The low-pass filter unit removes high-frequency components included in the air flow rate value input from the sensing unit. The measurement control device calculates a pulsation state that is a state of a pulsation occurring in the air flow rate based on the air flow rate value that has passed through the low-pass filter unit. The measurement control device corrects the air flow rate value using the pulsation state.

公开(公告)号：US20210108952A1

公开(公告)日：2021-04-15

申请号：US17132292

申请日：2020-12-23

Applicant: DENSO CORPORATION

Inventor： Noboru KITAHARA ,  Kengo ITO ,  Teruaki KAIFU ,  Amane HIGASHI

IPC: G01F1/72 ,  G01F1/69

Abstract: A measurement control device measures an air flow rate using an output value of a sensing portion that outputs a signal according to the air flow rate, and outputs the measurement result of the air flow rate to a predetermined external device. The measurement control device includes: a pulsation state calculator that calculates a pulsation state, which is a state of pulsation generated in the air flow rate, by using the output value of the sensing portion instead of acquiring an output value from an external device; and a flow rate correcting unit that corrects the air flow rate using the pulsation state calculated by the pulsation state calculator.