US5769060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-assisted fuel injection system
Assignee: Yamaha Motor Co Ltd
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Filing: 1996-11-20
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Granted: 1998-06-23
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Expires: 2016-11-20
Abstract
Abstract A number of embodiments of induction systems for internal combustion engines having fuel injector which spray fuel into the intake passages serving the individual combustion chambers. An arrangement is provided for injecting auxiliary air into the intake passages at atmospheric pressure. The timing and duration of air injection is varied so as to reduce pumping losses, control internal EGR, induce turbulence in the combustion chamber, control idle speed and to atomize the fuel injected by the fuel injectors, and, if desired, redirect it. Various valving and timing arrangements are disclosed whereby the duration and timing of the air injection can be controlled. In addition, embodiments are disclosed having insert pieces through which the fuel is injected and redirected by the air injected.
Inventors
- 👤 Hiromitsu Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:33
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/0002; F01; F01L; F01L1/00; F01L1/26; F01L1/265; F02B; F02B31/00; F02B31/08; F02B31/087; F02D13/00; F02D13/02; F02D13/0276; F02M; F02M26/00; F02M26/01; F02M26/52; F02M26/59; F02M26/60; F02M69/00; F02M69/04; F02M69/042; F02M69/044; F02M69/047; F02M69/08; F02M69/30; F02M69/32; F02B2275/00; F02B2275/18; F02D2041/001; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T10/40
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
133 words
An apparatus for injecting fuel into an internal combustion engine comprising a fuel injector having a spray nozzle for discharging a spray of fuel, an insert piece fixed relative to said fuel injector and defining a fan shaped channel through which at least a portion of the fuel from said injector passes, said channel tapering in one planar cross section from a narrow inlet end for receiving fuel and terminating in a wider outlet end from which fuel is discharge, the width of said channel in a perpendicular cross section plane being substantially constant along the length of said channel for creating a fan shaped spray pattern, and means for delivering air into said channel at a point to atomize the fuel delivery from said fuel injector and redirect the spray of fuel.
Claim 2
Independent Claim
133 words
An apparatus for injecting fuel into an internal combustion engine comprising a fuel injector having a spray nozzle for discharging a spray of fuel, an insert piece fixed relative to said fuel injector and defining a fan shaped channel through which at least a portion of the fuel from said injector passes, said channel tapering in one planar cross section from a narrow inlet end for receiving fuel and terminating in a wider outlet end from which fuel is discharge, the width of said channel in a perpendicular cross section plane being substantially constant along the length of said channel for creating a fan shaped spray pattern, and means for delivering air into said channel at a point to atomize the fuel delivery from said fuel injector and redirect the spray of fuel.
Claim 3
Dependent Claim
20 words
An apparatus as forth in claim 1, wherein the fan-shaped channel has a relatively narrow width relative to its length.
Claim 4
Dependent Claim
34 words
An apparatus as set forth in claim 1, wherein the means for delivering air into the channel comprises a plurality of radially extending air passages formed in the insert piece and intersecting the channel.
Claim 5
Dependent Claim
36 words
An apparatus as set forth in claim 1, wherein the air passages are arranged so that there are more air passages on one side of the channel than the other for redirecting the spray of fuel.
Claim 6
Dependent Claim
37 words
An apparatus as set forth in claim 1, wherein the insert piece is formed with a circumferential groove around its outer periphery into which the air passes extend and to which the supply of air is delivered.
Claim 7
Independent Claim
154 words
An apparatus for injecting fuel into an internal combustion engine comprising a fuel injector having a spray nozzle for discharging a spray of fuel, an insert piece fixed relative to said fuel injector and defining a channel through which at least a portion of the fuel from said injector passes, and means for delivering air into said channel at a point to atomize the fuel delivery from said fuel injector and redirect the spray of fuel said insert piece directing fuel to a combustion chamber through an induction that serves the combustion chamber through a plurality of intake valve seats, each valve by a respective poppet-type valves, said channel and said delivered air being arranged that the air when delivered directs the fuel toward less than all of said intake valve seats and when no air is delivered through said insert piece the is fuel is directed toward all of the intake valve seat.
Claim 8
Independent Claim
154 words
An apparatus for injecting fuel into an internal combustion engine comprising a fuel injector having a spray nozzle for discharging a spray of fuel, an insert piece fixed relative to said fuel injector and defining a channel through which at least a portion of the fuel from said injector passes, and means for delivering air into said channel at a point to atomize the fuel delivery from said fuel injector and redirect the spray of fuel said insert piece directing fuel to a combustion chamber through an induction that serves the combustion chamber through a plurality of intake valve seats, each valve by a respective poppet-type valves, said channel and said delivered air being arranged that the air when delivered directs the fuel toward less than all of said intake valve seats and when no air is delivered through said insert piece the is fuel is directed toward all of the intake valve seat.
Claim 9
Dependent Claim
22 words
An apparatus as set forth in claim 1, wherein the redirection of the spray is toward at least one specific valve seat.
Claim 10
Dependent Claim
17 words
An apparatus as set forth in claim 1, wherein the delivered air is at substantially atmospheric pressure.
Claim 11
Dependent Claim
152 words
An induction system for an internal combustion engine having a combustion chamber with a volume that varies cyclicly during a cycle of engine operation, an intake port for admitting an air charge to said combustion chamber, means for cyclicly opening and closing said intake port for controlling the admission of an air charge to said combustion chamber, means defining an air chamber communicating with said intake prot for supplying an air charge to said intake port, means for adjusting the effective volume of said air chamber in response to at least one engine running condition during at least a range of operation of said engine for controlling the volume of air which is supplied to said combustion chamber form said air chamber during a single intake cycle, and control valve means for communicating atmospheric air to said air chamber during the portion of the engine cycle when said intake port is closed.
Claim 12
Dependent Claim
152 words
An induction system for an internal combustion engine having a combustion chamber with a volume that varies cyclicly during a cycle of engine operation, an intake port for admitting an air charge to said combustion chamber, means for cyclicly opening and closing said intake port for controlling the admission of an air charge to said combustion chamber, means defining an air chamber communicating with said intake prot for supplying an air charge to said intake port, means for adjusting the effective volume of said air chamber in response to at least one engine running condition during at least a range of operation of said engine for controlling the volume of air which is supplied to said combustion chamber form said air chamber during a single intake cycle, and control valve means for communicating atmospheric air to said air chamber during the portion of the engine cycle when said intake port is closed.
Claim 13
Dependent Claim
35 words
The induction system for an internal combustion engine as set forth in claim 9, wherein the volume of the air chamber is adjusted in response to the operator demand and the load on the engine.
Claim 14
Dependent Claim
31 words
The induction system for an internal combustion engine as set forth in claim 10, wherein there is no throttling of the air delivered to the combustion chamber by the induction system.
Claim 15
Dependent Claim
36 words
An induction system for an internal combustion engine as set forth in claim 8, wherein the induction passage serves the combustion chamber through a plurality of intake valve seats, each valve by a respective poppet-type valve.
Claim 16
Dependent Claim
28 words
An induction system for an internal combustion engine as set forth in claim 12, wherein the redirection of the spray is toward at least one specific valve seat.
Claim 17
Dependent Claim
23 words
An induction system for an internal combustion engine as set forth in claim 13, wherein the delivered air is at substantially atmospheric pressure.
Claim 18
Dependent Claim
52 words
The induction system for an internal combustion engine as set forth in claim 7, wherein there is provided a first valve for controlling the effective volume of the air chamber and wherein the control valve means comprises a second valve controlling the flow to the air chamber from an atmospheric air inlet.
Claim 19
Dependent Claim
22 words
The induction system for an internal combustion engine as set forth in claim 15, wherein the first valve comprises a sliding piston.
Claim 20
Dependent Claim
46 words
The induction system for an internal combustion engine as set forth in claim 16, wherein the volume of the air intake port served by a respective air chamber, the atmospheric air source for said chambers comprising a common source in which the third valve is positioned.
Claim 21
Dependent Claim
31 words
The induction system for an internal combustion engine as set forth in claim 6, wherein the air chamber comprises a cylindrical chamber and the first control valve comprises a rotary valve.
Claim 22
Dependent Claim
36 words
The induction system for an internal combustion engine as set forth in claim 18, wherein the rotary valve communicates the cylindrical chamber with a further chamber when the rotary valve is in a fully opened position.
Claim 23
Dependent Claim
23 words
The induction system for an internal combustion engine as set forth in claim 1, wherein the closed chamber is closed from the atmosphere.
Claim 24
Dependent Claim
30 words
The induction system for an internal combustion engine as set forth in claim 20, further including a third valve for controlling the flow of atmospheric air to the second valve.
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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) | 2001-06-22 | 2001-12-22 | 2002-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-22 | 2005-12-22 | 2006-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-22 | 2009-12-22 | 2010-06-23 | $7700.00 | Window Closed / Lapsed |