Air flow sensor failure determination apparatus and method
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsOsamu Takizawa, Yuji Fujiki
Life of this patent
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Abstract
An air flow sensor failure determination apparatus for determining a failure of an air flow sensor for an internal combustion engine in which an air flow sensor, a throttle and a pressure sensor disposed downstream of the throttle are provided in an air induction passage, the air flow sensor failure determination apparatus comprising a first calculating unit for calculating a first induction air volume based on an output signal from the air flow sensor, a second calculating unit for calculating a second induction air volume based on an output from the pressure sensor, and a determination unit for determining a failure of the air flow sensor based on a comparison between the first induction air volume and the second induction air volume.
Claims21
An air flow sensor failure determination apparatus for determining a failure of an air flow sensor for an internal combustion engine in which an air flow sensor, a throttle and a pressure sensor disposed downstream of the throttle are provided in an air induction passage,
- the air flow sensor failure determination apparatus comprising;
- a first calculating unit for calculating a first induction air volume based on an output signal from the air flow sensor,
- a second calculating unit for calculating a second induction air volume based on an output from the pressure sensor, and
- a determination unit for determining a failure of the air flow sensor based on a comparison between the first induction air volume and the second induction air volume.
An air flow sensor failure determination method for determining a failure of an air flow sensor for an internal combustion engine in which an air flow sensor, a throttle and a pressure sensor disposed downstream of the throttle are provided in an air induction passage,
- the air flow sensor failure determination method comprising the steps of;
- a first calculating for calculating a first induction air volume based on an output signal from the air flow sensor,
- a second calculating for calculating a second induction air volume based on an output from the pressure sensor, and
- determination for determining a failure of the air flow sensor based on a comparison between the first induction air volume and the second induction air volume.
A medium including a program for performing an air flow sensor failure determination method for determining a failure of an air flow sensor for an internal combustion engine in which an air flow sensor, a throttle and a pressure sensor disposed downstream of the throttle are provided in an air induction passage,
- the air flow sensor failure determination method comprising the steps of;
- a first calculating for calculating a first induction air volume based on an output signal from the air flow sensor,
- a second calculating for calculating a second induction air volume based on an output from the pressure sensor, and
- determination for determining a failure of the air flow sensor based on a comparison between the first induction air volume and the second induction air volume.
Dependencies are inferred from the claim text.