US5619974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming a signal relating to the quantity of exhaust gas recirculated in an internal combustion engine
Assignee: Robert Bosch GmbH
•
Filing: 1996-01-16
•
Granted: 1997-04-15
•
Expires: 2016-01-16
Abstract
Abstract A method for forming a signal relating to the quantity of exhaust gas recirculated in an internal combustion engine. The signal for the quantity of recirculated exhaust gas is formed on the basis of a signal for the stream of fresh gas fed to the internal combustion engine and a signal for the entirety of the stream of gas fed to the internal combustion engine. The signal for the entirety of the stream of gas which is fed is formed from a series of characteristic operating variables. These characteristic operating variables include, inter alia, the pressure in the intake tract, which can either be detected by means of a sensor or be formed from standby signals. The signal for the quantity of recirculated exhaust gas can be provided with a dynamic correction signal. Furthermore, the signal for the quantity of recirculated exhaust gas can be used in an exhaust gas recirculation valve with position reporting facility to identify an adaptive correction signal.
Inventors
- 👤 Frank Rodefeld
- 👤 Nikolaus Benninger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:34
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/0025; F02D41/0047; F02D41/0065; F02D41/0072; F02D2200/00; F02D2200/02; F02D2200/04; F02D2200/0406; F02D2200/0408; F02D2200/70; F02D2200/703; F02D41/02; F02D41/18; F02D41/24; F02D41/2406; F02D41/2425; F02D41/2429; F02D41/2451; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
109 words
A method for controlling an internal-combustion engine, comprising the steps of: providing a first signal indicative of a fresh gas stream sucked in by the internal-combustion engine; providing a second signal indicative of an entire gas stream sucked in by the internal-combustion engine as a function of at least one of a pressure prevailing in an intake tract, a temperature prevailing in the intake tract, and rotational speed of the internal-combustion engine; forming a third signal indicative of a quantity of exhaust gas recirculated in the internal-combustion engine as a function of the first and second signals; and controlling the internal-combustion engine as a function of the third signal.
Claim 2
Independent Claim
109 words
A method for controlling an internal-combustion engine, comprising the steps of: providing a first signal indicative of a fresh gas stream sucked in by the internal-combustion engine; providing a second signal indicative of an entire gas stream sucked in by the internal-combustion engine as a function of at least one of a pressure prevailing in an intake tract, a temperature prevailing in the intake tract, and rotational speed of the internal-combustion engine; forming a third signal indicative of a quantity of exhaust gas recirculated in the internal-combustion engine as a function of the first and second signals; and controlling the internal-combustion engine as a function of the third signal.
Claim 3
Dependent Claim
26 words
The method according to claim 1, wherein the step of forming the third signal includes the step of subtracting the first signal from the second signal.
Claim 4
Dependent Claim
44 words
The method according to claim 1, further comprising the steps of: providing a dynamic correction signal as a function of at least one of the intake tract pressure and the intake track temperature; and using the dynamic correction signal to influence the third signal.
Claim 5
Dependent Claim
17 words
The method according to claim 3, further comprising the step of temporally differentiating the intake tract pressure.
Claim 6
Dependent Claim
35 words
The method according to claim 4, wherein the step of providing the dynamic correction signal includes the step of logically connecting the temporally differentiated pressure to a temperature signal dependent upon the intake tract temperature.
Claim 7
Dependent Claim
53 words
The method according to claim 1, further comprising the steps of: forming an adaptive correction signal as a function of the third signal; using a characteristic diagram to provide a fourth signal indicative of the quantity of recirculated exhaust gas; and correcting the fourth signal as a function of the adaptive correction signal.
Claim 8
Dependent Claim
21 words
The method according to claim 6, wherein the adaptive correction signal is formed under steady-state operating conditions of the internal-combustion engine.
Claim 9
Dependent Claim
46 words
The method according to claim 6, wherein the characteristic diagram includes the intake tract pressure, an ambient pressure, and a degree of opening of an exhaust gas recirculation valve arranged in a pipe connecting an exhaust gas port of the internal-combustion engine to the intake tract.
Claim 10
Independent Claim
117 words
A method for controlling an internal-combustion engine, comprising the steps of: providing a first signal indicative of a fresh gas stream sucked in by the internal-combustion engine; providing a second signal indicative of an entire gas stream sucked in by the internal-combustion engine as a function of the first signal and at least one of an opening angle of a throttle valve, an ambient pressure, a rotational speed of the internal-combustion engine, and a temperature prevailing in an intake tract; forming a third signal indicative of a quantity of exhaust gas recirculated in the internal-combustion engine as a function of the first and second signals; and controlling the internal-combustion engine as a function of the third signal.
Claim 11
Independent Claim
117 words
A method for controlling an internal-combustion engine, comprising the steps of: providing a first signal indicative of a fresh gas stream sucked in by the internal-combustion engine; providing a second signal indicative of an entire gas stream sucked in by the internal-combustion engine as a function of the first signal and at least one of an opening angle of a throttle valve, an ambient pressure, a rotational speed of the internal-combustion engine, and a temperature prevailing in an intake tract; forming a third signal indicative of a quantity of exhaust gas recirculated in the internal-combustion engine as a function of the first and second signals; and controlling the internal-combustion engine as a function of the third signal.
Claim 12
Independent Claim
146 words
A device for controlling an internal-combustion engine, comprising: a first sensor for providing a first signal indicative of a fresh gas stream sucked in by the internal-combustion engine; at least one second sensor for sensing at least one of a pressure prevailing in an intake tract, a temperature prevailing in the intake tract, and a rotational speed of the internal-combustion engine; and a control unit for producing a second signal indicative of an entire gas stream sucked in by the internal-combustion engine as a function of the at least one of the intake tract pressure, the intake tract temperature, and the rotational speed of the internal-combustion engine; for forming a third signal indicative of a quantity of exhaust gas recirculated in the internal-combustion engine as a function of the first and second signals; and for controlling the internal-combustion engine as a function of the third signal.
Claim 13
Independent Claim
146 words
A device for controlling an internal-combustion engine, comprising: a first sensor for providing a first signal indicative of a fresh gas stream sucked in by the internal-combustion engine; at least one second sensor for sensing at least one of a pressure prevailing in an intake tract, a temperature prevailing in the intake tract, and a rotational speed of the internal-combustion engine; and a control unit for producing a second signal indicative of an entire gas stream sucked in by the internal-combustion engine as a function of the at least one of the intake tract pressure, the intake tract temperature, and the rotational speed of the internal-combustion engine; for forming a third signal indicative of a quantity of exhaust gas recirculated in the internal-combustion engine as a function of the first and second signals; and for controlling the internal-combustion engine as a function of the third signal.
References Cited (Backward Citations)
US4762109A
Cited
US4942860A
Cited
US5273019A
Cited
US5205260A
Cited
US5383126A
Cited
US5379744A
Cited
US5482020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-04-14 | 2000-10-14 | 2001-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-04-14 | 2004-10-14 | 2005-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-04-14 | 2008-10-14 | 2009-04-15 | $7700.00 | Window Closed / Lapsed |