IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0884750
(2001-06-19)
|
발명자
/ 주소 |
- Hepburn, Jeffrey Scott
- Temple, JoAnne
- Dearth, Mark Allen
|
출원인 / 주소 |
- Ford Global Technologies, Inc.
|
대리인 / 주소 |
Voutyras, JuliaLippa, Allan J.
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
149 |
초록
▼
A system and method is provided for controlling a lean-burn engine whose exhaust gas is directed through an exhaust treatment system which includes an emission control device that alternately stores and releases a selected constituent of the exhaust gas, such as NOx,based on engine operating conditi
A system and method is provided for controlling a lean-burn engine whose exhaust gas is directed through an exhaust treatment system which includes an emission control device that alternately stores and releases a selected constituent of the exhaust gas, such as NOx,based on engine operating conditions, and a downstream NOxsensor. The system estimates the concentration of NOxflowing into the device based on engine operating conditions while determining a value for the concentration of NOxflowing out of the device based upon the output signal generated by NOxsensor. A device purge event is scheduled when the device efficiency, calculated based on the NOxconcentrations flowing into and out of the device, falls below a predetermined minimum efficiency value. The length of a purge event is determined as a function of an accumulated measure based on the difference between the NOxconcentrations into and out of the device.
대표청구항
▼
A system and method is provided for controlling a lean-burn engine whose exhaust gas is directed through an exhaust treatment system which includes an emission control device that alternately stores and releases a selected constituent of the exhaust gas, such as NOx,based on engine operating conditi
A system and method is provided for controlling a lean-burn engine whose exhaust gas is directed through an exhaust treatment system which includes an emission control device that alternately stores and releases a selected constituent of the exhaust gas, such as NOx,based on engine operating conditions, and a downstream NOxsensor. The system estimates the concentration of NOxflowing into the device based on engine operating conditions while determining a value for the concentration of NOxflowing out of the device based upon the output signal generated by NOxsensor. A device purge event is scheduled when the device efficiency, calculated based on the NOxconcentrations flowing into and out of the device, falls below a predetermined minimum efficiency value. The length of a purge event is determined as a function of an accumulated measure based on the difference between the NOxconcentrations into and out of the device. enclosure, wherein said bait holder is sized to fit into said bait holder holes and extend across the interior. 4. The bait station of claim 3, wherein said vent holes are located above said bait holder holes. 5. The bait station of claim 1, further comprising a hinge extending between said pivotally connected sections, said hinge including a pivot axis spaced from said vertical side wall surfaces. 6. The bait station of claim 1, wherein said roof includes an awning extending past the outer surface of the vertical side wall enclosure at an upper portion. 7. The bait station of claim 6, wherein said roof includes a hanging plate and a hole therein for suspending said bait station. 8. A bait station for flying insects comprising: a vertical side wall enclosure, said vertical side wall enclosure having inner and outer surfaces, a bottom end, and a top portion; a roof positioned adjacent the top portion of the side wall enclosure; an interior defined by and fully surrounded by the inner surface of the vertical side wall enclosure and the roof; wherein said bottom end of the vertical side wall enclosure is substantially open causing the interior to be substantially unbounded from below, such that when bait is positioned in the interior, insects may freely fly upward into the bait station through the substantially open bottom end of the vertical side wall enclosure; a bait holder for holding bait, said bait holder including a bait container, and bait holder holes on opposite sides of the vertical side wall enclosure, wherein said bait holder is sized and configured to fit into and is coupled to, said bait holder holes and extends across the interior; wherein said bait station is void of structure directly beneath the bait container. 9. A bait station for flying insects comprising: a vertical side wall enclosure, said vertical side wall enclosure having inner and outer surfaces and a top portion and a bottom end, said vertical side wall enclosure further having a plurality of vent holes extending from the inner surface to the outer surface; a roof positioned adjacent the top portion of the side wall enclosure, said roof having an awning extending past the outer surface of the vertical side wall enclosure; an interior defined by the inner surface of the vertical side wall enclosure and the roof, said interior intended for holding bait, wherein attractant from such bait being permitted to permeate through said vent holes to attract flying insects, said bottom end of the vertical side wall enclosure being substantially open and substantially void of passageway blocking structure permitting a flying insect to fly directly upward into the interior from beneath the bait station at substantially any region below the interior; and a bait holder for holding bait, and bait holder holes on opposite sides of the vertical side wall enclosure, wherein said bait holder is sized to fit into, and is coupled to, said bait holder holes and extends across the interior. 10. The bait station of claim 9, wherein said vent holes are located above said bait holder holes. 11. A bait station for flying insects comprising: a vertical side wall enclosure, said vertical side wall enclosure including a plurality of curved shell elements each pivotally coupled to an adjacent curved shell element, inner and outer surfaces and having top and bottom portions, said vertical side wall enclosure further having a plurality of vent holes extending from the inner surface to the outer surface; a roof positioned adjacent the top portion of the side wall enclosure; an interior defined by the inner surface of the vertical side wall enclosure and the roof, said in
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