[미국특허]
Engine with flow coupled spark discharge
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02B-023/08
F02P-003/06
출원번호
US-0395106
(1995-02-27)
발명자
/ 주소
Ward Michael A. V. (Arlington MA)
출원인 / 주소
Combustion Electromagnetics, Inc. (Arlington MA 02)
인용정보
피인용 횟수 :
60인용 특허 :
0
초록▼
An improved spark ignition engine system producing a large continuous, centrally directed, flow coupled ignition spark discharge through combustion chamber (1), piston (4), inlet system (28/29), spark plug (5), and ignition spark discharge (26) design, and through the location and orientation, with
An improved spark ignition engine system producing a large continuous, centrally directed, flow coupled ignition spark discharge through combustion chamber (1), piston (4), inlet system (28/29), spark plug (5), and ignition spark discharge (26) design, and through the location and orientation, with respect to the mixture flow field, of a special design firing end and gap (7/9) of a spark plug fired with a spark discharge of hundreds of watts of power for hundreds of microseconds without spark segmentation or spark break-up by the flow field of up to about 20 m/sec flow velocity, with bulk flow occurring at the spark plug site at most engine speeds including low speeds to produce a very large centrally directed spark-initial flame front kernel which allows for substantial dilution of the mixture and significant reduction in engine cycle-to-cycle variation under most operating conditions of the engine including low speed light load.
대표청구항▼
In an internal combustion, IC, engine including means for forming at least one combustion chamber, means for forming an air-fuel mixture therein, means for cyclically igniting said mixture, the latter means including at least one igniter element in contact with the chamber\s air fuel mixture content
In an internal combustion, IC, engine including means for forming at least one combustion chamber, means for forming an air-fuel mixture therein, means for cyclically igniting said mixture, the latter means including at least one igniter element in contact with the chamber\s air fuel mixture contents and means for energizing said igniter element to produce a mixture igniting spark discharge at the spark firing end of said igniter element, the improvement comprising: an engine constructed and arranged to have its combustion chamber mainly in a central portion of the piston in the form of a smooth bowl with the rim of the bowl defining a piston land to the outer edge of the piston, wherein the piston land induces essentially centrally directed squish motion as it approaches TC and wherein said igniter element has its most centrally oriented region of its spark gap in a position between the position of the rim of the piston (referenced to the TC piston position) and the center of the piston bowl to provide some squish flow at the spark plug site essentially perpendicular to the spark gap and spark kernel to stretch the spark and move it towards the center of the combustion chamber without break up or segmenting of the main spark energy delivery portion of said spark discharge under most normal operating conditions of the engine and helping spread the flame into the combustion chamber. In an internal combustion, IC, engine including means for forming at least one combustion chamber, means for forming an air-fuel mixture therein, means for cyclically igniting said mixture, the latter means including at least one igniter element in contact with the chamber\s air fuel mixture contents and means for energizing said igniter element to produce a mixture igniting spark discharge at the spark firing end of said igniter element, the improvement comprising: means for producing bulk flow of the air-fuel mixture at the spark firing end of said igniter element during the time of ignition for most normal operating conditions of the engine such that the mixture is ignited by the spark discharge, and for moving the spark discharge and the initial flame formed from said spark discharge in a direction toward a central region of said combustion chamber in part as a result of said mixture flow, and wherein motion of said spark discharge is achieved at least, in part, by elongation or stretching of said spark discharge without break up or segmenting of the main spark energy delivery portion of said spark discharge.
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