Gas injector for the direct injection of gaseous fuel into a combustion chamber
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02M-021/02
F02M-045/08
F02M-045/12
출원번호
US-0599071
(2015-01-16)
등록번호
US-9810179
(2017-11-07)
우선권정보
DE-10 2014 200 756 (2014-01-17)
발명자
/ 주소
Jaegle, Felix
Ohlhafer, Olaf
Schoefer, Joerg
Giezendanner-Thoben, Robert
출원인 / 주소
ROBERT BOSCH GMBH
대리인 / 주소
Norton Rose Fulbright US LLP
인용정보
피인용 횟수 :
1인용 특허 :
38
초록▼
A gas injector for the direct injection of gaseous fuel into a combustion chamber of an internal combustion engine, including a valve seat, a valve needle, which in response to a lift releases a first cross-sectional area at the valve seat, and a gas control region, which is situated at the valve ne
A gas injector for the direct injection of gaseous fuel into a combustion chamber of an internal combustion engine, including a valve seat, a valve needle, which in response to a lift releases a first cross-sectional area at the valve seat, and a gas control region, which is situated at the valve needle and defines a second cross-sectional area together with a component surrounding the valve needle, and in response to a lift, a change in the first cross-sectional area at the valve seat differs from a change in the second cross-sectional area at the gas control region.
대표청구항▼
1. A gas injector for directly injecting gaseous fuel into a combustion chamber of an internal combustion engine, comprising: a valve seat;a valve needle, which releases a first cross-sectional area at the valve seat in a lift; anda gas control region situated at the valve needle and which defines a
1. A gas injector for directly injecting gaseous fuel into a combustion chamber of an internal combustion engine, comprising: a valve seat;a valve needle, which releases a first cross-sectional area at the valve seat in a lift; anda gas control region situated at the valve needle and which defines a second cross-sectional area together with a component surrounding the valve needle;wherein in response to a lift, a change in the first cross-sectional area at the valve seat differs from a change in the second cross-sectional area at the gas control region, andwherein downstream from the gas control region in a flow direction, the gas injector has a space having a larger radius than a radius of the valve seat, so that once a predefined lift has occurred at the gas control region, the gas control region has no effect on an overall cross-sectional area for the injection of the gaseous fuel. 2. The injector of claim 1, wherein the second cross-sectional area at the gas-control region is constant up to a predefined lift length at the start of a lift of the valve needle. 3. The injector of claim 1, wherein the gas control region has a control edge, which has an annular shape. 4. The injector of claim 3, wherein the control edge has a larger diameter than a diameter of the valve seat. 5. The injector of claim 1, wherein the gas control region is configured in the form of a star or petals with a multitude of radially outwardly directed jags. 6. The injector of claim 1, wherein the gas control region has through recesses or in which subregions have been removed at the control edge of the gas control region. 7. The injector of claim 1, wherein the component surrounding the valve needle is a housing of the gas injector. 8. The injector of claim 1, further comprising: a sealing element disposed at the gas control region of the valve needle or disposed at the component surrounding the valve needle to form a pre-valve. 9. The injector of claim 1, wherein at least one of the following is satisfied: (i) a cross-sectional area for the ejection of gas at the valve seat is in a range of 2 mm2 to 6 mm2, and (ii) a diameter of the annular control edge is in a range of 7 mm2 to 20 mm2. 10. The injector of claim 1, wherein an emerging gas mass flow is in the range from 5 g/s to 15 g/s. 11. The injector of claim 1, further comprising: a sealing element, which includes an elastomer, disposed at the gas control region of the valve needle or disposed at the component surrounding the valve needle to form a pre-valve. 12. The injector of claim 11, wherein the gas control region is configured in the form of a star or petals with a multitude of radially outwardly directed jags. 13. The injector of claim 11, wherein the gas control region has through recesses or in which subregions have been removed at the control edge of the gas control region. 14. The injector of claim 1, wherein the second cross-sectional area at the gas-control region is constant up to a predefined lift length at the start of a lift of the valve needle, and wherein the gas control region has a control edge, which has an annular shape. 15. The injector of claim 14, wherein the control edge has a larger diameter than a diameter of the valve seat. 16. The injector of claim 14, wherein at least one of the following is satisfied: (i) a cross-sectional area for the ejection of gas at the valve seat is in a range of 2 mm2 to 6 mm2, and (ii) a diameter of the annular control edge is in a range of 7 mm2 to 20 mm2. 17. The injector of claim 14, further comprising: a sealing element disposed at the gas control region of the valve needle or disposed at the component surrounding the valve needle to form a pre-valve;wherein the component surrounding the valve needle is a housing of the gas injector. 18. The injector of claim 14, further comprising: a sealing element, which includes an elastomer, disposed at the gas control region of the valve needle or disposed at the component surrounding the valve needle to form a pre-valve;wherein the component surrounding the valve needle is a housing of the gas injector. 19. The injector of claim 14, wherein an emerging gas mass flow is in the range from 5 g/s to 15 g/s.
Yanagihara Hiromichi (Gotemba JPX) Sato Yasuo (Susono JPX) Kawaguchi Akio (Susono JPX), Compression-ignition type engine and combustion method of same.
Fochtman, James Paul; Wright, Danny Orlen; Cohen, James H., Contaminant tolerant compressed natural gas injector and method of directing gaseous fuel therethrough.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.