US4478186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for an internal combustion engine with externally supplied ignition
Assignee: Robert Bosch GmbH
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Filing: 1982-05-12
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Granted: 1984-10-23
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Expires: 2002-05-12
Abstract
Abstract A control system for internal combustion engines with externally supplied ignition and having a throttle valve in the air intake tube, a controllable bypass around the throttle valve and a fuel metering system, in which at least at predetermined operating states, a special fuel metering signal is formed in accordance with the control signal for the bypass opening and preferably also in accordance with the rpm. It is thereby possible to establish a supplementary air quantity and a supplementary fuel quantity independently of one another in individual operating ranges; this provides a great deal of freedom and makes it possible to attain quite various possible kinds of regulation, such as idling-rpm regulation, lambda regulation, engine smoothness regulation and fuel consumption regulations. For generating the special fuel metering signal, a performance graph is efficaciously used, by way of which various operating parameters, such as temperature, can be taken into account.
Inventors
- 👤 Hartmut Bauer
- 👤 Bernhard Bonse
- 👤 Peter Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:02
CPC Classifications
F; F02; F02D; F02D43/00; F02D41/00; F02D41/0002; F02D41/02; F02D41/14; F02D41/1438; F02D41/1477; F02D41/1482; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
150 words
In a control system for externally ignited, internal combustion engines, having an intake tube, a throttle valve mounted in the intake tube, a controllable bypass around the throttle valve, and a fuel metering system, the improvement comprising: an adjusting device for adjusting the opening cross section of the bypass; control signal generating means connected to the adjusting device for generating a control signal applied to the adjusting device for adjusting the bypass opening; means for generating a load signal dependent on air flow via said throttle valve and applying said signal to said control generating means, and fuel quantity signal generating means forming part of the fuel metering system connected to receive the control signal from the control signal generating means, said fuel quantity signal generating means producing a fuel metering signal dependent on load and rpm which signal is influenced by said control signal from said control signal generator.
Claim 2
Dependent Claim
150 words
In a control system for externally ignited, internal combustion engines, having an intake tube, a throttle valve mounted in the intake tube, a controllable bypass around the throttle valve, and a fuel metering system, the improvement comprising: an adjusting device for adjusting the opening cross section of the bypass; control signal generating means connected to the adjusting device for generating a control signal applied to the adjusting device for adjusting the bypass opening; means for generating a load signal dependent on air flow via said throttle valve and applying said signal to said control generating means, and fuel quantity signal generating means forming part of the fuel metering system connected to receive the control signal from the control signal generating means, said fuel quantity signal generating means producing a fuel metering signal dependent on load and rpm which signal is influenced by said control signal from said control signal generator.
Claim 3
Dependent Claim
18 words
In the control system as defined in claim 1, wherein the fuel quantity signal is generated during idling.
Claim 4
Dependent Claim
43 words
In the control system as defined in claim 1, wherein the fuel quantity signal generating means, for generating the fuel quantity signal, is connected to also receive an rpm signal, a temperature signal, an exhaust gas composition signal, and an engine smoothness signal.
Claim 5
Dependent Claim
44 words
In the control system as defined in claim 1, wherein the fuel quantity signal generating means, for generating the fuel quantity signal, is connected to also receive an rpm signal, a temperature signal, and exhaust gas composition signal and a specific fuel consumption signal.
Claim 6
Dependent Claim
27 words
In the control system as defined in claim 1, wherein the fuel quantity signal is additive to the fuel quantity signal generated by the fuel metering system.
Claim 7
Dependent Claim
28 words
In the control system as defined in claim 1, wherein the fuel quantity signal is applied alternatively to the fuel quantity signal generated by the fuel metering system.
Claim 8
Dependent Claim
31 words
In the control system as defined in claim 2, wherein the fuel quantity signal is generated by the fuel quantity signal generator, during idling, in accordance with the following formula: tiL=a·(τBP-b)1/n+c
Claim 9
Dependent Claim
24 words
In the control system as defined in claim 2, wherein the fuel quantity signal generator includes memory means for generating the fuel quantity signal.
Claim 10
Dependent Claim
25 words
In the control system as defined in claim 1, wherein lambda regulation is achieved by controlling the bypass opening and generating the fuel quantity signal.
Claim 11
Dependent Claim
26 words
In the control system as defined in claim 1, wherein engine smoothness regulating is achieved by controlling the bypass opening and generating the fuel quantity signal.
Claim 12
Dependent Claim
28 words
In the control system as defined in claim 1, wherein fuel consumption regulation is achieved by controlling the bypass opening cross section and generating the fuel quantity signal.
Claim 13
Dependent Claim
27 words
In the control system as defined in claim 1, wherein the fuel quantity signal is held constant during idling to achieve fuel consumption regulation ( be min).
Claim 14
Dependent Claim
28 words
In the control system as defined in claim 1, wherein the fuel quantity signal is held constant during partial load to achieve fuel consumption regulation ( be min).
Claim 15
Dependent Claim
30 words
In the control system as defined in claim 1, wherein the fuel quantity signal is held constant during idling and partial load to achieve fuel consumption regulation ( be min).
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) | 1987-10-23 | 1988-04-23 | 1988-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-23 | 1992-04-23 | 1992-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-23 | 1996-04-23 | 1996-10-23 | $7700.00 | Window Closed / Lapsed |