Patent US5211145A successfully refreshed from Google Patents.
US5211145A
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US
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Fuel injection system for engine
Assignee: Yamaha Motor Co Ltd
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Filing: 1992-01-22
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Granted: 1993-05-18
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Expires: 2012-01-22
Abstract
Abstract Several embodiments of fuel injected engines wherein stability and running is achieved by maintaining an injection velocity that is greater than the velocity of the charge in the chamber including that component contributed by the squish action in the engine and at least equal to 40 meters per second so as to ensure effective stratification and the existence of a stoichiometric charge at the spark plugs at the time of ignition, even under low load and speed conditions such as idle.
Inventors
- 👤 Ryuichi Ichikawa
- 👤 Yu Motoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:05
CPC Classifications
F; F02; F02B; F02B17/00; F02B17/005; F02B23/00; F02B23/08; F02B23/10; F02B23/101; F02F; F02F1/00; F02F1/24; F02F1/242; F02M; F02M69/00; F02M69/08; F02B2023/085; F02B2023/108; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B75/12; F02B2075/125; F02B2275/00; F02B2275/40; F02F3/00; F02F3/26; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
112 words
An internal combustion engine have a pair of relatively moveable components defining a variable volume chamber comprising, at minimum volume, a recess surrounded at least in part by a squish area, fuel injection means for injecting fuel into said recess and toward said squish area for combustion therein, and means for controlling the pressure of the fuel injected to maintain an injection velocity of at least 40 meters per second of the fuel injected into the chamber and an injection velocity at least equal to the velocity imported to the charge in the chamber by the squish action from said squish area, as the engine variable volume chamber approaches its minimum volume.
Claim 2
Dependent Claim
112 words
An internal combustion engine have a pair of relatively moveable components defining a variable volume chamber comprising, at minimum volume, a recess surrounded at least in part by a squish area, fuel injection means for injecting fuel into said recess and toward said squish area for combustion therein, and means for controlling the pressure of the fuel injected to maintain an injection velocity of at least 40 meters per second of the fuel injected into the chamber and an injection velocity at least equal to the velocity imported to the charge in the chamber by the squish action from said squish area, as the engine variable volume chamber approaches its minimum volume.
Claim 3
Dependent Claim
38 words
An internal combustion engine as set forth in claim 1 further including intake port means for delivering an air charge to the variable volume chamber and exhaust port means for discharging the discharge from the variable volume chamber.
Claim 4
Dependent Claim
25 words
An internal combustion engine as set forth in claim 2 further including spark plug means in the variable volume chamber for igniting the charge therein.
Claim 5
Dependent Claim
31 words
An internal combustion engine as set forth in claim 1 wherein the engine comprises a reciprocating engine and the relatively moveable components comprises a piston and cylinder block, cylinder head assembly.
Claim 6
Dependent Claim
24 words
An internal combustion engine as set forth in claim 4 further including spark plug means in the cylinder head for igniting the charge therein.
Claim 7
Dependent Claim
21 words
An internal combustion engine as set forth in claim 4 wherein the engine operates on a two stroke, crankcase compression principle.
Claim 8
Dependent Claim
32 words
An internal combustion engine as set forth in claim 1 wherein the fuel injection means comprises a fuel/air injector for injecting both fuel and air under pressure into the variable volume chamber.
Claim 9
Dependent Claim
31 words
An internal combustion engine as set forth in claim 7 wherein the engine comprises a reciprocating engine and the relatively moveable components comprises a piston and cylinder block, cylinder head assembly.
Claim 10
Dependent Claim
24 words
An internal combustion engine as set forth in claim 8 further including spark plug means in the cylinder head for igniting the charge therein.
Claim 11
Dependent Claim
87 words
An internal combustion engine comprising a pair of relatively moveable components defining a variable volume chamber comprised at its minimum volume condition by a recess and surrounded at least in part by a squish area, fuel injection means for injecting fuel into said recess for combustion herein, and means for controlling the pressure of the fuel injection to maintain an injection velocity at least equal to the velocity of the charge in the chamber caused by the squish action as the chamber approaches its minimum volume condition.
Claim 12
Dependent Claim
87 words
An internal combustion engine comprising a pair of relatively moveable components defining a variable volume chamber comprised at its minimum volume condition by a recess and surrounded at least in part by a squish area, fuel injection means for injecting fuel into said recess for combustion herein, and means for controlling the pressure of the fuel injection to maintain an injection velocity at least equal to the velocity of the charge in the chamber caused by the squish action as the chamber approaches its minimum volume condition.
Claim 13
Dependent Claim
30 words
An internal combustion engine as set forth in claim 10 wherein the fuel injection means comprises a fuel/air injector for injecting both fuel and air under pressure into the recess.
Claim 14
Dependent Claim
31 words
An internal combustion engine as set forth in claim 10 wherein the engine comprises a reciprocating engine and the relatively moveable components comprises a piston and cylinder block, cylinder head assembly.
Claim 15
Dependent Claim
30 words
An internal combustion engine as set forth in claim 12 wherein the fuel injection means comprises a fuel/air injector for injecting both fuel and air under pressure into the recess.
Claim 16
Dependent Claim
23 words
An internal combustion engine as set forth in claim 13 further including spark plug means in the recess for igniting the charge therein.
Claim 17
Independent Claim
114 words
A method of operating an internal combustion engine have a pair of relatively moveable components defining a variable volume chamber comprising, at minimum volume, a recess surrounded at least in part by a squish area, fuel injection means for injecting fuel into said recess toward said squish area for combustion therein, said method comprising the step of controlling the pressure of the fuel injected to maintain an injection velocity of at least 40 meters per second of the fuel injected into the cylinder and an injection velocity at least equal to the velocity of the charge in the chamber created by the squish action as the engine variable volume chamber approaches its minimum volume.
Claim 18
Independent Claim
114 words
A method of operating an internal combustion engine have a pair of relatively moveable components defining a variable volume chamber comprising, at minimum volume, a recess surrounded at least in part by a squish area, fuel injection means for injecting fuel into said recess toward said squish area for combustion therein, said method comprising the step of controlling the pressure of the fuel injected to maintain an injection velocity of at least 40 meters per second of the fuel injected into the cylinder and an injection velocity at least equal to the velocity of the charge in the chamber created by the squish action as the engine variable volume chamber approaches its minimum volume.
Claim 19
Independent Claim
95 words
A method of operating an internal combustion engine comprising a pair of relatively moveable components defining a variable volume chamber comprised at its minimum volume condition by a recess and surrounded at least in part by a squish area, fuel injection means for injecting fuel into said chamber for combustion therein, and said method comprising the steps of controlling the pressure of the fuel injection to maintain an injection velocity at least equal to the velocity of the charge in the chamber caused by the squish action as the chamber approaches its minimum volume condition.
Claim 20
Independent Claim
95 words
A method of operating an internal combustion engine comprising a pair of relatively moveable components defining a variable volume chamber comprised at its minimum volume condition by a recess and surrounded at least in part by a squish area, fuel injection means for injecting fuel into said chamber for combustion therein, and said method comprising the steps of controlling the pressure of the fuel injection to maintain an injection velocity at least equal to the velocity of the charge in the chamber caused by the squish action as the chamber approaches its minimum volume condition.
Claim 21
Dependent Claim
36 words
A method of operating an internal combustion engine as set forth in claim 16 wherein the fuel injection means comprises a fuel/air injector for injecting both fuel and air under pressure into the variable volume chamber.
Claim 22
Dependent Claim
35 words
A method of comprising an internal combustion engine as set forth in claim 16 wherein the engine comprises a reciprocating engine and the relatively moveable components comprises a piston and cylinder block, cylinder head assembly.
Claim 23
Dependent Claim
36 words
A method of comprising an internal combustion engine as set forth in claim 18 wherein the fuel injection means comprises a fuel/air injector for injecting both fuel and air under pressure into the variable volume chamber.
Claim 24
Dependent Claim
32 words
A method of comprising an internal combustion engine as set forth in claim 19 further including the steps of igniting the charge by a spark plug means in the variable volume chamber.
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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) | 1996-05-17 | 1996-11-16 | 1997-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-17 | 2000-11-16 | 2001-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-17 | 2004-11-16 | 2005-05-18 | $7700.00 | Window Closed / Lapsed |