US4476829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic control system for the fuel quantity of an internal combustion engine having self-ignition
Assignee: Robert Bosch GmbH
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Filing: 1984-03-07
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Granted: 1984-10-16
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Expires: 2004-03-07
Abstract
Abstract An electronic control system for the fuel quantity of an internal combustion engine having self-ignition is proposed, in which above a predetermined load threshold the increase in fuel quantity is limited and a regulation of exhaust gas temperature is performed. The load threshold is preferably approximately 75% of the full-load value, and it may be dependent on operating characteristics, for instance on the rpm. Depending upon the engine type, it may be useful to regulate not the absolute exhaust gas temperature but rather the difference between the exhaust gas temperature and the temperature of the aspirated air.
Inventors
- 👤 Max Straubel
- 👤 Wolf Wessel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:58
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/1438; F02D41/1444; F02D41/1446; F02D41/30; F02D41/38
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
96 words
An electronic control system for regulating the fuel quantity in an internal combustion engine having self-ignition and a final control element in accordance with the driving pedal position, rpm and exhaust gas temperature, comprising means for determining the fuel quantity in dependence on the driving pedal position and the rpm, means for providing a predetermined load threshold, means for limiting the function of said fuel quantity above said load threshold, thereby delaying an increase in fuel quantity, and means for limiting the fuel quantity to said final control element in accordance with the exhaust gas temperature.
Claim 2
Dependent Claim
96 words
An electronic control system for regulating the fuel quantity in an internal combustion engine having self-ignition and a final control element in accordance with the driving pedal position, rpm and exhaust gas temperature, comprising means for determining the fuel quantity in dependence on the driving pedal position and the rpm, means for providing a predetermined load threshold, means for limiting the function of said fuel quantity above said load threshold, thereby delaying an increase in fuel quantity, and means for limiting the fuel quantity to said final control element in accordance with the exhaust gas temperature.
Claim 3
Dependent Claim
17 words
A control system as defined by claim 1, wherein said load threshold is dependent on operating characteristics.
Claim 4
Dependent Claim
16 words
A control system as defined by claim 1, wherein said load threshold is dependent on rpm.
Claim 5
Dependent Claim
19 words
A control system as defined by claim 1, wherein said load threshold is approximately 75% of the full load.
Claim 6
Dependent Claim
17 words
A control system as defined by claim 1, wherein the delay is within the range of seconds.
Claim 7
Dependent Claim
41 words
A control system as defined by claim 1, wherein said exhaust gas temperature comprises a set-point value dependent on at least one of the variables of rpm, charge pressure, injection onset and air throughout in an intake tube of said engine.
Claim 8
Dependent Claim
28 words
A control system as defined by claim 5, further comprising means for processing the value of the difference of said exhaust gas temperature from the aspirated air temperature.
Claim 9
Dependent Claim
22 words
A control system as defined by claim 5, wherein the fuel metering is switched off after the attainment of the maximum rpm.
Claim 10
Independent Claim
95 words
A method for an electronic control system for regulating the fuel quantity in an internal combustion engine having self-ignition and a final control element in accordance with the driving pedal position, rpm and exhaust gas temperature, comprising the steps of determining the fuel quantity in dependence on the driving pedal position and on the rpm, providing a predetermined load threshold, limiting the function of said fuel quantity above said load threshold, thereby delaying an increase in fuel quantity, and limiting the fuel quantity to said final control element in accordance with the exhaust gas temperature.
Claim 11
Independent Claim
95 words
A method for an electronic control system for regulating the fuel quantity in an internal combustion engine having self-ignition and a final control element in accordance with the driving pedal position, rpm and exhaust gas temperature, comprising the steps of determining the fuel quantity in dependence on the driving pedal position and on the rpm, providing a predetermined load threshold, limiting the function of said fuel quantity above said load threshold, thereby delaying an increase in fuel quantity, and limiting the fuel quantity to said final control element in accordance with the exhaust gas temperature.
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) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |