Full-close abnormality diagnosis apparatus for flow control valve
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 2, 2019
Grant Date -
Apr 19, 2018
app pub date -
Oct 12, 2017
filing date -
Oct 18, 2016
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An EGR valve includes a valve seat in a flow passage of a housing, a valve element seatable on the valve seat, a rotary shaft to open or close the valve element, a motor and a speed reducing mechanism, a return spring urging the valve element in a valve closing direction, and an opening-degree sensor to detect an opening degree of the valve element. An electronic control unit (ECU) diagnoses abnormality due to lodging of foreign matter between the valve seat and the valve element during full close. When driving the motor to urge the valve element in the valve closing direction during full close of the valve element, the ECU determines the EGR valve to be abnormal because of lodging of foreign matter if a difference between a value detected by the opening-degree sensor and a predetermined reference value is larger than a first determination value.
First Claim
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Family
International Classification(s)
- 2017 Application Filing Year
- F16K Class
- 2135 Applications Filed
- 1600 Patents Issued To-Date
- 74.95 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- F16K Class
- 0 % this patent is cited more than
- 6 Age
Maintenance Fees
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|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jan 2, 2027 |
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