Fuel injection system with cross-flow nozzle for enhanced compressed natural gas jet spray
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02B-005/00
F02B-005/02
출원번호
US-0010486
(2008-01-25)
등록번호
US-7469675
(2008-12-30)
발명자
/ 주소
Parish, Jr.,James R.
출원인 / 주소
Continental Automotive Systems US, Inc.
인용정보
피인용 횟수 :
0인용 특허 :
15
초록▼
An intake manifold system including an intake manifold and a compressed natural gas (CNG) fuel injector located between an inlet and an outlet of the intake manifold. The CNG fuel injector includes a housing, an inlet, an outlet, a seat, a closure member, and a nozzle. In a preferred embodiment, the
An intake manifold system including an intake manifold and a compressed natural gas (CNG) fuel injector located between an inlet and an outlet of the intake manifold. The CNG fuel injector includes a housing, an inlet, an outlet, a seat, a closure member, and a nozzle. In a preferred embodiment, the inlet and outlet communicate a flow of gaseous fuel regulated by the closure member. The gaseous fuel passes through the seat, which is secured to a rim surface of a retainer portion of the nozzle, and into a flow passage that further communicates the flow of gaseous fuel into one or more flow channels. The orientation of the flow channels within the nozzle greatly affects the discharge pattern and mixing characteristics of the gaseous fuel within an intake manifold. A method of metering gaseous fuel in an intake manifold having a gaseous fuel supply coupled to a fuel injector is also described.
대표청구항▼
What is claimed is: 1. An intake manifold system comprising: an intake manifold having an inlet and an outlet to permit air flow from the inlet to the outlet along a flow axis connecting the inlet and outlet; and a compressed natural gas fuel injector having an inlet and an outlet and a passage ext
What is claimed is: 1. An intake manifold system comprising: an intake manifold having an inlet and an outlet to permit air flow from the inlet to the outlet along a flow axis connecting the inlet and outlet; and a compressed natural gas fuel injector having an inlet and an outlet and a passage extending along a longitudinal axis from the inlet to the outlet, the fuel injector including a nozzle proximate the outlet and disposed in the intake manifold between the inlet and outlet so that when the fuel injector is actuated with pressurized gaseous fuel, at least a pair of diametrically opposed columns of gaseous fuel spray is dispersed orthogonally with respect to a longitudinal axis of the fuel injector and directed at an angle with respect to the direction of air flow along the flow axis through the intake manifold. 2. An intake manifold system comprising: an intake manifold having an inlet and an outlet to permit air flow from the inlet to the outlet along a flow axis connecting the inlet and outlet; and a compressed natural gas fuel injector having an inlet and an outlet and a passage extending along a longitudinal axis from the inlet to the outlet, the fuel injector including a nozzle proximate the outlet and disposed in the intake manifold between the inlet and outlet so that when the fuel injector is actuated with pressurized gaseous fuel, at least one column of gaseous fuel spray is dispersed orthogonally with respect to a longitudinal axis of the fuel injector and directed at an acute angle with respect to the direction of air flow along the flow axis through the intake manifold, wherein the nozzle comprises a retainer portion and flow modifier portion, the retainer portion being secured to an outer surface of the outlet, the flow modifier including a first flow modifier surface and a second flow modifier surface, the first flow modifier surface being disposed about the longitudinal axis to define a flow passage in fluid communication with the seat orifice, the second flow modifier surface being disposed along and about a first axis at an angle with respect to the longitudinal axis to define at least a flow channel. 3. The system of claim 2, wherein the fuel injector comprises: a closure member disposed in at least two positions along the longitudinal axis in the passage, the closure member having an imperforate contact portion proximate the outlet; and a seat disposed in the passage proximate the outlet, the seat including a sealing surface contiguous to the imperforate contact portion of the closure member in one position of the closure member to occlude flow through a seat orifice extending through the seat from the sealing surface along the longitudinal axis. 4. The system of claim 3, wherein the second flow modifier surface further comprises a second flow channel diametric to the first flow channel. 5. The system of claim 4, wherein the second flow modifier surface further comprises third and fourth flow channel diametric aligned along a second axis generally orthogonal to the longitudinal and first axes, and each of the flow channels comprises a generally circular cross-section with respect to the first and second axes. 6. The system of claim 3, wherein the at least one column comprises four columns disposed generally orthogonal with respect to the longitudinal axis. 7. The system of claim 3, wherein the retainer portion comprises a portion surrounding an outer surface proximate the outlet of the fuel injector. 8. The system of claim 3, wherein the outlet comprises an inner surface that surrounds a portion of the retainer portion. 9. The system of claim 6, wherein the pressurized gaseous fuel comprises compressed-natural-gas at about 200 psi. 10. An intake manifold system comprising: an intake manifold having an inlet and an outlet to permit air flow from the inlet to the outlet along a flow axis connecting the inlet and outlet; and a compressed natural gas fuel injector having an inlet and an outlet and a passage extending along a longitudinal axis from the inlet to the outlet, the fuel injector including a nozzle proximate the outlet and disposed in the intake manifold between the inlet and outlet, the nozzle having a flow passage disposed about an axis that is at an acute angle with respect to the longitudinal axis, so that when the fuel injector is actuated with pressurized gaseous fuel, at least one column of gaseous fuel spray is dispersed generally at an acute angle with respect to the longitudinal axis and in the direction of the flow axis. 11. The system of claim 10, wherein the acute angle comprises about 26 degrees. 12. The system of claim 11, wherein the column comprises a generally conical column extending along a spray axis disposed at the acute angle with respect to the longitudinal axis. 13. The system of claim 10, wherein the pressurized gaseous fuel comprises compressed-natural-gas at about 200 psi. 14. The system of claim 10, wherein the fuel injector comprises: a closure member disposed in at least two positions along the longitudinal axis in the passage, the closure member having an imperforate contact portion proximate the outlet; and a seat disposed in the passage proximate the outlet, the seat including a sealing surface contiguous to the imperforate contact portion of the closure member in one position of the closure member to occlude flow through a seat orifice extending through the seat from the sealing surface along the longitudinal axis. 15. The system of claim 14, wherein the retainer portion comprises a portion surrounding an outer surface proximate the outlet of the fuel injector. 16. The system of claim 14, wherein the outlet comprises an inner surface that surrounds a portion of the retainer portion. 17. A method of metering gaseous fuel in an intake manifold having a gaseous fuel supply coupled to a compressed natural gas fuel injector, the method comprising: flowing air from an inlet to an outlet through a passage of an intake manifold; flowing gaseous fuel from the gaseous fuel supply to an inlet end of the compressed natural gas fuel injector; and forming a generally ellipsoidal gaseous fuel spray pattern proximate the outlet in the passage of the intake manifold, wherein the forming comprises dispersing the gaseous fuel from the inlet through a nozzle proximate the outlet into four columns of gaseous fuel spray, the nozzle having a flow passage in communication with two flow channels intersecting each other orthogonally with respect to a longitudinal axis of the fuel injector. 18. The method of claim 17, wherein the dispersing comprises entraining the four columns of gaseous fuel spray with air flowing through the passage of the intake manifold into the ellipsoidal gaseous fuel spray pattern. 19. The method of claim 17, wherein the step of flowing gaseous fuel includes providing the gaseous fuel as compressed-natural-gas at about 200 psi.
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