US6152102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Throttle control system for a stratified charge internal combustion engine
Assignee: Brunswick Corp
•
Filing: 1999-03-22
•
Granted: 2000-11-28
•
Expires: 2019-03-22
Abstract
Abstract An engine control scheme determines the appropriate and desired magnitude of scavenging air flow for a two stroke engine as a function of both load and engine speed. The desired air flow is determined, as a function of engine load and engine speed, to achieve an optimal magnitude of emissions within the exhaust stream and to also optimize a reverse thrust capabilities of the marine propulsion system.
Inventors
- 👤 Mark A. Ruman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:08
CPC Classifications
F; F02; F02B; F02B17/00
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
117 words
A system for controlling the operation of an engine, comprising: means for creating at least a partially stratified charge of fuel and air within a combustion chamber of said engine; means for determining a magnitude of a preselected parameter of said engine; means determining a magnitude of an actual airflow into said combustion chamber; means, connected in signal communication with said means for determining a magnitude of said preselected parameter, for selecting a desired airflow into said combustion chamber as a function of said preselected parameter; and means, connected in signal communication with said actual airflow magnitude determining means, for changing a throttle position to cause said actual airflow to be generally equal to said desired airflow.
Claim 2
Independent Claim
117 words
A system for controlling the operation of an engine, comprising: means for creating at least a partially stratified charge of fuel and air within a combustion chamber of said engine; means for determining a magnitude of a preselected parameter of said engine; means determining a magnitude of an actual airflow into said combustion chamber; means, connected in signal communication with said means for determining a magnitude of said preselected parameter, for selecting a desired airflow into said combustion chamber as a function of said preselected parameter; and means, connected in signal communication with said actual airflow magnitude determining means, for changing a throttle position to cause said actual airflow to be generally equal to said desired airflow.
Claim 3
Dependent Claim
30 words
The system of claim 1, wherein: said preselected parameter magnitude determining means comprises a stored table of values of desired airflow as a function of the load on said engine.
Claim 4
Dependent Claim
20 words
The system of claim 1, wherein: said at least partially stratified charge creating means comprises a direct fuel injection system.
Claim 5
Dependent Claim
35 words
The system of claim 1, wherein: said preselected parameter determining means comprises a stored table of values of desired airflow as a function of the speed of said engine and the load on said engine.
Claim 6
Dependent Claim
25 words
The system of claim 1, wherein: said actual airflow determining means comprises a barometric pressure sensor, a manifold pressure sensor, and an air temperature sensor.
Claim 7
Dependent Claim
16 words
The system of claim 1, wherein: said actual airflow determining means comprises a mass airflow sensor.
Claim 8
Dependent Claim
16 words
The system of claim 1, wherein: said actual airflow determining means comprises a hot wire anemometer.
Claim 9
Independent Claim
65 words
A method for controlling the operation of an engine, comprising: providing at least a partially stratified charge of fuel and air within a combustion chamber of said engine; and controlling a magnitude of airflow into said combustion chamber of said engine, as a function of a preselected parameter of said engine, to achieve a preselected level of optimization of charge purity within said combustion chamber.
Claim 10
Independent Claim
65 words
A method for controlling the operation of an engine, comprising: providing at least a partially stratified charge of fuel and air within a combustion chamber of said engine; and controlling a magnitude of airflow into said combustion chamber of said engine, as a function of a preselected parameter of said engine, to achieve a preselected level of optimization of charge purity within said combustion chamber.
Claim 11
Dependent Claim
92 words
The method of claim 8, further comprising: determining a magnitude of a load on said engine, said load being said preselected parameter; determining a magnitude of an actual airflow into said combustion chamber; selecting a desired magnitude of airflow into said combustion chamber, as a function of said magnitude of said load, to achieve said preselected level of optimization of scavenging of said combustion chamber as a function of said load on said engine; and changing a throttle position to cause said actual airflow to be generally equal to said desired airflow.
Claim 12
Dependent Claim
35 words
The method of claim 9, wherein: said desired airflow magnitude is determined as a function of a load on said engine and an empirically derived relationship between exhaust pollutants and airflow into said combustion chamber.
Claim 13
Dependent Claim
32 words
The method of claim 8, further comprising: measuring a magnitude of a parameter related to exhaust pollutants; and determining said preselected level of optimization of scavenging as a function of said parameter.
Claim 14
Independent Claim
89 words
A method for controlling the operation of an engine, comprising: creating at least a partially stratified charge of fuel and air within a combustion chamber of said engine; determining a magnitude of a preselected parameter of said engine; determining a magnitude of an actual airflow into said combustion chamber; selecting a desired magnitude of airflow into said combustion chamber as a function of said magnitude of said preselected parameter; and changing a throttle position to cause said actual airflow magnitude to be generally equal to said desired airflow magnitude.
Claim 15
Independent Claim
89 words
A method for controlling the operation of an engine, comprising: creating at least a partially stratified charge of fuel and air within a combustion chamber of said engine; determining a magnitude of a preselected parameter of said engine; determining a magnitude of an actual airflow into said combustion chamber; selecting a desired magnitude of airflow into said combustion chamber as a function of said magnitude of said preselected parameter; and changing a throttle position to cause said actual airflow magnitude to be generally equal to said desired airflow magnitude.
Claim 16
Dependent Claim
18 words
The method of claim 12, wherein: said preselected magnitude of said parameter is the load on said engine.
Claim 17
Dependent Claim
22 words
The method of claim 12, wherein: said at least partially stratified charge creating step is performed by a direct fuel injection system.
Claim 18
Dependent Claim
29 words
The method of claim 12, wherein: said magnitude of said preselected parameter is calculated as a function of the speed of said engine and the load on said engine.
Claim 19
Dependent Claim
23 words
The method of claim 12, wherein: said actual airflow magnitude is calculated as a function of barometric pressure, manifold pressure, and air temperature.
Claim 20
Dependent Claim
16 words
The method of claim 12, wherein: said actual airflow is measured by a mass airflow sensor.
Claim 21
Dependent Claim
16 words
The method of claim 12, wherein: said actual airflow is measured by a hot wire anemometer.
Claim 22
Dependent Claim
32 words
The method of claim 12, wherein: said desired airflow is determined as a function of said preselected parameter and an empirically derived relationship between exhaust pollutants and airflow into said combustion chamber.
Claim 23
Dependent Claim
20 words
The method of claim 12, wherein: said at least partially stratified charge is provided by a direct fuel injection system.
References Cited (Backward Citations)
US4173203A
Cited
US4185599A
Cited
US4192262A
Cited
US4289094A
Cited
US4920932A
Cited
US4668199A
Cited
US4969435A
Cited
US5054444A
Cited
US4995354A
Cited
US5078109A
Cited
US5282449A
Cited
US5259344A
Cited
US5609021A
Cited
US5540205A
Cited
US5595515A
Cited
US5666918A
Cited
US5832895A
Cited
US5848582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-11-28 | 2004-05-29 | 2004-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-11-28 | 2008-05-29 | 2008-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-11-28 | 2012-05-29 | 2012-11-28 | $7700.00 | Window Closed / Lapsed |