Patent US1804692A successfully refreshed from Google Patents.
Patent US5666918A successfully refreshed from Google Patents.
US5666918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine airflow controller with feedback loop compensation for changes in engine operating conditions
Assignee: Ford Global Technologies LLC
•
Filing: 1995-12-11
•
Granted: 1997-09-16
•
Expires: 2015-12-11
Abstract
Abstract An Electronic Engine Controller (EEC) controls the operation of an electronically controlled throttle. The EEC generates a predicted desired throttle angle value as a function of upstream and downstream air pressure values, an air temperature value and a desired airflow value. A predicted actual throttle angle value is generated as a function of the upstream and downstream air pressure values, an air temperature value and an actual airflow value. A throttle angle difference value is generated as a function of the difference between the predicted desired throttle angle value and the predicted actual throttle angle value. A PID controller is employed to generate a throttle angle change value. The throttle angle change value is then added to the predicted desired throttle angle change value to generate a throttle angle control value, indicative of a position for said throttle. The throttle angle is then altered to a position corresponding to the throttle angle control value.
Inventors
- 👤 Tobias J. Pallett
- 👤 Bradley J. Hieb
- 👤 Jerry D. Robichaux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:04
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/1401; F02D11/00; F02D11/06; F02D11/10; F02D41/0002; F02D41/24; F02D41/2406; F02D41/2425; F02D41/2429; F02D41/2451; F02D2041/1409; F02D2041/141; F02D2041/1433; F02D2041/1434; F02D2200/00; F02D2200/02; F02D2200/04; F02D2200/0402; F02D2250/00; F02D2250/16; F02D41/2477; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
195 words
Apparatus for controlling the airflow rate past a throttle plate of an engine, positioned in an intake of the engine, the apparatus comprising: means, responsive to an actual airflow value, indicative of the mass flow rate of air into said intake, and to a set of air intake values, indicative of a plurality of air intake characteristics, for generating an actual predicted throttle plate angle indicative of a first predicted position of said throttle plate; means, responsive to a desired airflow value, indicative of a desired mass flow rate of air into said intake, and to said set of air intake values, for generating a desired predicted throttle plate angle indicative of a second predicted position of said throttle plate; a controller, responsive to the difference between said actual predicted throttle plate angle and to said desired predicted throttle plate angle, for generating a throttle position change value; means, responsive to said difference and to said desired predicted throttle plate angle, for generating a throttle angle control value indicative of a position of said throttle plate; and means, for causing change of said throttle to a position which corresponds to said throttle angle control value.
Claim 2
Dependent Claim
195 words
Apparatus for controlling the airflow rate past a throttle plate of an engine, positioned in an intake of the engine, the apparatus comprising: means, responsive to an actual airflow value, indicative of the mass flow rate of air into said intake, and to a set of air intake values, indicative of a plurality of air intake characteristics, for generating an actual predicted throttle plate angle indicative of a first predicted position of said throttle plate; means, responsive to a desired airflow value, indicative of a desired mass flow rate of air into said intake, and to said set of air intake values, for generating a desired predicted throttle plate angle indicative of a second predicted position of said throttle plate; a controller, responsive to the difference between said actual predicted throttle plate angle and to said desired predicted throttle plate angle, for generating a throttle position change value; means, responsive to said difference and to said desired predicted throttle plate angle, for generating a throttle angle control value indicative of a position of said throttle plate; and means, for causing change of said throttle to a position which corresponds to said throttle angle control value.
Claim 3
Dependent Claim
59 words
Apparatus as set forth in claim 1 wherein said first set of air intake values includes an upstream air pressure value, indicative of air pressure upstream of a throttle plate, a downstream air pressure value, indicative of air pressure downstream of said throttle plate, and an air temperature value, indicative of the temperature of said air entering said intake.
Claim 4
Dependent Claim
15 words
Apparatus as set forth in claim 2 wherein said controller is a proportional-integral-differential type controller.
Claim 5
Dependent Claim
256 words
Apparatus for controlling the airflow rate past a throttle plate of an engine, positioned in an intake of the engine, the apparatus comprising: means for generating an upstream air pressure value, indicative of air pressure upstream of a throttle plate; means for generating a downstream air pressure value, indicative of air pressure downstream of said throttle plate; means for generating an actual air mass flow rate value, indicative of the actual mass flow rate of air into said intake; means for generating an air temperature value, indicative of the temperature of said air entering said intake; means, responsive to said upstream air pressure value, said downstream air pressure value, said air temperature value and a desired air mass flow rate value, indicative of desired airflow past said throttle plate, for generating a predicted desired throttle angle value; means, responsive to said upstream air pressure value, said downstream air pressure value, said air temperature value and said actual air mass value, for generating a predicted actual throttle angle value; means, responsive to said predicted desired throttle angle value and to said predicted actual throttle angle value, for generating a throttle angle difference value; means, responsive to said throttle angle difference value, for generating a throttle angle change value; means, responsive to said throttle angle change value and to said predicted desired throttle angle value for generating a throttle angle control value, indicative of a position for said throttle; and means, for causing change of said throttle to a position which corresponds to said throttle angle control value.
Claim 6
Dependent Claim
256 words
Apparatus for controlling the airflow rate past a throttle plate of an engine, positioned in an intake of the engine, the apparatus comprising: means for generating an upstream air pressure value, indicative of air pressure upstream of a throttle plate; means for generating a downstream air pressure value, indicative of air pressure downstream of said throttle plate; means for generating an actual air mass flow rate value, indicative of the actual mass flow rate of air into said intake; means for generating an air temperature value, indicative of the temperature of said air entering said intake; means, responsive to said upstream air pressure value, said downstream air pressure value, said air temperature value and a desired air mass flow rate value, indicative of desired airflow past said throttle plate, for generating a predicted desired throttle angle value; means, responsive to said upstream air pressure value, said downstream air pressure value, said air temperature value and said actual air mass value, for generating a predicted actual throttle angle value; means, responsive to said predicted desired throttle angle value and to said predicted actual throttle angle value, for generating a throttle angle difference value; means, responsive to said throttle angle difference value, for generating a throttle angle change value; means, responsive to said throttle angle change value and to said predicted desired throttle angle value for generating a throttle angle control value, indicative of a position for said throttle; and means, for causing change of said throttle to a position which corresponds to said throttle angle control value.
Claim 7
Dependent Claim
22 words
The invention as set forth in claim 4 wherein the means for generating a throttle angle change value comprises a proportional-integral-difference controller.
Claim 8
Dependent Claim
16 words
The invention as set forth in claim 5 wherein the throttle is an electronically controlled throttle.
Claim 9
Dependent Claim
40 words
The invention as set forth in claim 6 wherein the means for generating an upstream air pressure value infers said upstream air pressure value as a function of the rotational speed of said engine and said actual air mass value.
Claim 10
Dependent Claim
42 words
The invention as set forth in claim 7 wherein the means for generating an downstream air pressure value infers said downstream air pressure value as a function of the rotational speed of said engine and said actual air mass flow rate value.
Claim 11
Dependent Claim
22 words
The invention as set forth in claim 6 wherein the means for generating an upstream air pressure value comprises a pressure sensor.
Claim 12
Dependent Claim
22 words
The invention as set forth in claim 8 wherein the means for generating a downstream air pressure value comprises a pressure sensor.
Claim 13
Dependent Claim
313 words
An article of manufacture comprising: a computer storage medium having a computer program encoded therein for causing a computer to control a throttle angle of an electronically controlled throttle, said computer storage medium comprising: means for causing a computer to generate an upstream air pressure value, indicative of air pressure upstream of said throttle; means for causing a computer to generate a downstream air pressure value, indicative of air pressure downstream of said throttle; means for causing a computer to generate an actual air mass value, indicative of the actual mass flow rate of air into said intake; means for causing a computer to generate an air temperature value, indicative of the temperature of said air entering said intake; means for causing a computer to generate, as a function of said upstream air pressure value, said downstream air pressure value, said air temperature value and a desired airflow value, indicative of desired airflow past said throttle plate, a predicted desired throttle angle value; means for causing a computer to generate, as a function of said upstream air pressure value, said downstream air pressure value, said air temperature value and said actual air mass value, a predicted actual throttle angle value; means for causing a computer to generate, as a function of said predicted desired throttle angle value and said predicted actual throttle angle value, a throttle angle difference value; means for causing a computer to generate as a function of said throttle angle difference value, a throttle angle change value; and means for causing a computer to generate, as a function of said throttle angle change value and said predicted desired throttle angle value, a throttle angle control value, indicative of a position for said throttle; and means for causing a computer to transmit a throttle control signal to change said throttle to a position which corresponds to said throttle angle control value.
Claim 14
Dependent Claim
313 words
An article of manufacture comprising: a computer storage medium having a computer program encoded therein for causing a computer to control a throttle angle of an electronically controlled throttle, said computer storage medium comprising: means for causing a computer to generate an upstream air pressure value, indicative of air pressure upstream of said throttle; means for causing a computer to generate a downstream air pressure value, indicative of air pressure downstream of said throttle; means for causing a computer to generate an actual air mass value, indicative of the actual mass flow rate of air into said intake; means for causing a computer to generate an air temperature value, indicative of the temperature of said air entering said intake; means for causing a computer to generate, as a function of said upstream air pressure value, said downstream air pressure value, said air temperature value and a desired airflow value, indicative of desired airflow past said throttle plate, a predicted desired throttle angle value; means for causing a computer to generate, as a function of said upstream air pressure value, said downstream air pressure value, said air temperature value and said actual air mass value, a predicted actual throttle angle value; means for causing a computer to generate, as a function of said predicted desired throttle angle value and said predicted actual throttle angle value, a throttle angle difference value; means for causing a computer to generate as a function of said throttle angle difference value, a throttle angle change value; and means for causing a computer to generate, as a function of said throttle angle change value and said predicted desired throttle angle value, a throttle angle control value, indicative of a position for said throttle; and means for causing a computer to transmit a throttle control signal to change said throttle to a position which corresponds to said throttle angle control value.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-09-15 | 2001-03-17 | 2001-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-09-15 | 2005-03-17 | 2005-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-09-15 | 2009-03-17 | 2009-09-16 | $7700.00 | Window Closed / Lapsed |