Invention Grant
- Patent Title: Air flow quantity measuring apparatus for internal combustion engine
- Patent Title (中): 内燃机气流量测量装置
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Application No.: US13242349Application Date: 2011-09-23
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Publication No.: US09052223B2Publication Date: 2015-06-09
- Inventor: Yasushi Kohno
- Applicant: Yasushi Kohno
- Applicant Address: JP Kariya
- Assignee: DENSO CORPORATION
- Current Assignee: DENSO CORPORATION
- Current Assignee Address: JP Kariya
- Agency: Nixon & Vanderhye P.C.
- Priority: JP2010-221240 20100930
- Main IPC: G01F1/684
- IPC: G01F1/684 ; F02D41/00 ; G01F1/696 ; G01F5/00 ; F02D41/18
Abstract:
A flow meter outputs a frequency signal, which corresponds to an air flow quantity of intake air to be supplied to an engine. In an engine control unit, when a sensed value of the air flow quantity, which is obtained based on the frequency signal, is within an estimated air flow quantity range, which is estimated based on an operational state of the engine, the sensed value of the air flow quantity is determined as a measurement value of the flow meter. In contrast, when the sensed value of the air flow quantity is out of the estimated air flow quantity range, a median of the estimated air flow quantity range is determined as the measurement value of the flow meter.
Public/Granted literature
- US20120079889A1 AIR FLOW QUANTITY MEASURING APPARATUS FOR INTERNAL COMBUSTION ENGINE Public/Granted day:2012-04-05
Information query
