US6095113A
Expired / Lapsed
US
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Fuel injection apparatus and control method thereof
Assignee: Hitachi Ltd
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Filing: 1998-04-02
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Granted: 2000-08-01
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Expires: 2018-04-02
Abstract
Abstract Fuel-air mixture is stabilized with respect to the neighboring area of an ignition plug without any effect on deflection of fuel spray due to the air flow (swirl/tumble) in a combustion chamber, and the deposition of fuel onto the side wall of a combustion chamber is reduced, leading to the prevention of smoke. To that end, a fuel injection apparatus includes a fuel injection valve having a nozzle opening to a combustion chamber and an ignition plug, in which the fuel injection valve forms a fuel spray having different. levels of average speed. The fuel injection valve forms a fuel spray having relatively high speed at least in a half way of a single cycle of a fuel injection, and after that, the fuel injection valve forms relatively low-speed fuel spray, and consequently, a fuel-air mixture including high-speed fuel spray is supplied to a neighboring area of the ignition plug.
Inventors
- 👤 Toshiharu Nogi
- 👤 Takuya Shiraishi
- 👤 Yoko Nakayama
- 👤 Minoru Ohsuga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:09
CPC Classifications
F; F02; F02M; F02M61/00; F02M61/16; F02M61/18; F02M61/188; F02B; F02B23/00; F02B23/08; F02B23/10; F02B23/104; F02F; F02F3/00; F02F3/26; F02M51/00; F02M51/06; F02M51/061; F02M51/0625; F02M51/0664; F02M51/0671; F02M61/162; F02M69/00; F02M69/04; F02M69/042; F02M69/045; F02B2023/106; F02B2023/108; F02B75/00; F02B75/12; F02B2075/125; F02B2275/00; F02B2275/48; F02F1/00; F02F1/24; F02F2001/244; F02F2001/245; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
76 words
A fuel injection apparatus comprising a fuel injection valve having a nozzle opening to a combustion chamber and an ignition plug, wherein said fuel injection valve forms a fuel spray having different levels of average speed, wherein said fuel injection valve forms a fuel spray having relatively high speed at least in half of a single cycle of a fuel injection, and after that, said fuel injection valve forms a fuel spray having relatively low speed.
Claim 2
Dependent Claim
76 words
A fuel injection apparatus comprising a fuel injection valve having a nozzle opening to a combustion chamber and an ignition plug, wherein said fuel injection valve forms a fuel spray having different levels of average speed, wherein said fuel injection valve forms a fuel spray having relatively high speed at least in half of a single cycle of a fuel injection, and after that, said fuel injection valve forms a fuel spray having relatively low speed.
Claim 3
Dependent Claim
64 words
A fuel injection apparatus comprising a fuel injection valve having a nozzle opening to a combustion chamber and an ignition plug, wherein said fuel injection valve forms a fuel spray having different levels of average speed, wherein said fuel injection valve is placed in a side surface of an engine head, and said ignition plug is placed near a center of said engine head.
Claim 4
Dependent Claim
64 words
A fuel injection apparatus comprising a fuel injection valve having a nozzle opening to a combustion chamber and an ignition plug, wherein said fuel injection valve forms a fuel spray having different levels of average speed, wherein said fuel injection valve is placed in a side surface of an engine head, and said ignition plug is placed near a center of said engine head.
Claim 5
Dependent Claim
18 words
A fuel injection apparatus of claim 2, wherein one of a tumble and swirl air flow is applied.
Claim 6
Dependent Claim
64 words
A fuel injection apparatus, comprising a fuel injection valve having a nozzle opening to a combustion chamber and an ignition plug, wherein said fuel injection valve forms a fuel spray having different levels of average speed, wherein an ignition means is placed in a side surface of an engine head, and a fuel injection means is placed near a center of said engine head.
Claim 7
Dependent Claim
64 words
A fuel injection apparatus, comprising a fuel injection valve having a nozzle opening to a combustion chamber and an ignition plug, wherein said fuel injection valve forms a fuel spray having different levels of average speed, wherein an ignition means is placed in a side surface of an engine head, and a fuel injection means is placed near a center of said engine head.
Claim 8
Dependent Claim
67 words
A fuel injection apparatus, comprising a fuel injection valve having a nozzle opening to a combustion chamber and an ignition plug, wherein said fuel injection valve forms a fuel spray having different levels of average speed, wherein a spray angle of a fuel spray having low speed is selected so that said fuel spray may be included on a top of a piston at bottom dead center.
Claim 9
Dependent Claim
67 words
A fuel injection apparatus, comprising a fuel injection valve having a nozzle opening to a combustion chamber and an ignition plug, wherein said fuel injection valve forms a fuel spray having different levels of average speed, wherein a spray angle of a fuel spray having low speed is selected so that said fuel spray may be included on a top of a piston at bottom dead center.
Claim 10
Dependent Claim
87 words
A fuel injection apparatus comprising a fuel injection valve having a nozzle opening to a combustion chamber and an ignition plug, wherein said fuel injection valve forms a fuel spray having different levels of average speed, wherein said fuel injection valve has a fuel swirling part at an upper stream of a valve body; and among fuel channels in said fuel swirling part, a channel having a larger offset with respect to a nozzle center is placed art an upper stream of a channel having smaller offset.
Claim 11
Dependent Claim
87 words
A fuel injection apparatus comprising a fuel injection valve having a nozzle opening to a combustion chamber and an ignition plug, wherein said fuel injection valve forms a fuel spray having different levels of average speed, wherein said fuel injection valve has a fuel swirling part at an upper stream of a valve body; and among fuel channels in said fuel swirling part, a channel having a larger offset with respect to a nozzle center is placed art an upper stream of a channel having smaller offset.
Claim 12
Dependent Claim
73 words
A fuel injection apparatus, comprising a fuel injection valve having a nozzle opening to a combustion chamber and an ignition plug, wherein said fuel injection valve forms a fuel spray having different levels of average speed, wherein said fuel injection valve has a fuel swirling part at an upper stream of a valve body; and a enlarged part is formed at an outlet part of a fuel channel of said fuel swirling part.
Claim 13
Dependent Claim
73 words
A fuel injection apparatus, comprising a fuel injection valve having a nozzle opening to a combustion chamber and an ignition plug, wherein said fuel injection valve forms a fuel spray having different levels of average speed, wherein said fuel injection valve has a fuel swirling part at an upper stream of a valve body; and a enlarged part is formed at an outlet part of a fuel channel of said fuel swirling part.
Claim 14
Dependent Claim
45 words
A fuel injection valve for an engine, provided with a valve body, a valve seat, a nozzle opening and a fuel guide in a nozzle portion, wherein said fuel guide forms a plurality of fuel swirling passages each of which has different strength of swirling.
Claim 15
Dependent Claim
45 words
A fuel injection valve for an engine, provided with a valve body, a valve seat, a nozzle opening and a fuel guide in a nozzle portion, wherein said fuel guide forms a plurality of fuel swirling passages each of which has different strength of swirling.
Claim 16
Dependent Claim
50 words
A fuel injection valve according to claim 8, wherein a first group of fuel swirling passages which have a first strength of swirling is formed at the nozzle opening side, compared with a second group of fuel swirling passage which have a larger strength of swirling than said first group.
Claim 17
Dependent Claim
26 words
A fuel injection valve according to claim 8, wherein at least one of said swirling passages is inclined to an exit direction of the nozzle opening.
Claim 18
Dependent Claim
26 words
A fuel injection valve according to claim 8, wherein at least one unswirl-fuel-chamber is formed inside of said fuel swirling passages in which fuel is unswirled.
Claim 19
Dependent Claim
31 words
A fuel injection valve according to claim 8, wherein said fuel guide includes at least one by-pass fuel passage for by-passing the fuel from the upper stream to the lower stream.
Claim 20
Dependent Claim
30 words
A fuel injection valve according to claim 12, wherein said at least one by-pass fuel passage comprises a plurality of by-pass passages whose passage areas are different from each other.
Claim 21
Dependent Claim
32 words
A fuel injection valve according to claim 8, wherein the passage area of the gap between said valve body and the valve seat is decreased in a direction of the nozzle exit.
Claim 22
Dependent Claim
68 words
A fuel injection valve for an engine, provided with a valve body, a valve seat, a nozzle opening and a fuel guide in a nozzle portion, wherein said fuel guide is provided with a plurality of fuel guiding passages formed along an imaginary line which intersects with a center axis line of said nozzle opening, and said fuel guiding passages are formed so that streams of fuel collide.
Claim 23
Dependent Claim
68 words
A fuel injection valve for an engine, provided with a valve body, a valve seat, a nozzle opening and a fuel guide in a nozzle portion, wherein said fuel guide is provided with a plurality of fuel guiding passages formed along an imaginary line which intersects with a center axis line of said nozzle opening, and said fuel guiding passages are formed so that streams of fuel collide.
Claim 24
Dependent Claim
62 words
A fuel injection valve for an engine, provided with a valve body, a valve seat, a nozzle opening and a fuel guide in a nozzle portion, wherein said fuel guide is provided with a plurality of fuel guiding passages and a plurality of fuel swirling passages, formed along an imaginary line which intersects with a center axis line of said nozzle opening.
Claim 25
Dependent Claim
62 words
A fuel injection valve for an engine, provided with a valve body, a valve seat, a nozzle opening and a fuel guide in a nozzle portion, wherein said fuel guide is provided with a plurality of fuel guiding passages and a plurality of fuel swirling passages, formed along an imaginary line which intersects with a center axis line of said nozzle opening.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-08-01 | 2004-01-31 | 2004-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-08-01 | 2008-01-31 | 2008-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-08-01 | 2012-01-31 | 2012-08-01 | $7700.00 | Window Closed / Lapsed |