US5021959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device for internal combustion engines
Assignee: Robert Bosch GmbH
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Filing: 1987-11-27
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Granted: 1991-06-04
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Expires: 2007-11-27
Abstract
Abstract In a control device (14) for fuel injection and/or spark ignition in an internal combustion engine, a first datablock (16) is programmed for operation in accordance with engine operating parameters (BM, P, L, n, T) but without lambda control when the engine is cold and a second datablock (18) is programmed for operation with lambda control when the engine is warm. A switching logic (26) switches in the first datablock (16) when the engine is started below a lower threshold (T 1 ) and switches over to the second datablock (18) when the temperature rises above a higher threshold (T 2 ).
Inventors
- 👤 Werner Jundt
- 👤 Norbert Miller
- 👤 Rainer Sommer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:40
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/24; F02D41/2406; F02D41/2409; F02D41/2422; F02D41/02; F02D41/04; F02D41/06; F02D41/062; F02D41/064; F02D41/065
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
206 words
A control device for an internal combustion engine, the control device comprising: a computer including: a first datablock programmed for operating under starting conditions of the engine; a second datablock programmed for operating under normal operating conditions of the engine; and, a processor for processing engine operating parameters in accordance with data from said first or second datablock; said processor including a switching device responsive to at least one operating parameter of the engine for selecting the one of said datablocks to be used; said switching device being responsive to the temperature (T) of the cooling system for switching over from said first datablock to said second datablock when an upper predetermined temperature (T 2 ) is exceeded; said switching device being adapted to switch to said first datablock when the engine is started with the sensed temperature below a lower predetermined temperature (T 1 ) determined separately from said upper predetermined temperature (T 2 ) and only switches to the second datablock when the sensed temperature exceeds the upper predetermined temperature (T 2 ); and, said switching device also being adapted to switch directly to the second datablock when the engine is started with the sensed temperature above said lower predetermined temperature (T 1 ).
Claim 2
Dependent Claim
206 words
A control device for an internal combustion engine, the control device comprising: a computer including: a first datablock programmed for operating under starting conditions of the engine; a second datablock programmed for operating under normal operating conditions of the engine; and, a processor for processing engine operating parameters in accordance with data from said first or second datablock; said processor including a switching device responsive to at least one operating parameter of the engine for selecting the one of said datablocks to be used; said switching device being responsive to the temperature (T) of the cooling system for switching over from said first datablock to said second datablock when an upper predetermined temperature (T 2 ) is exceeded; said switching device being adapted to switch to said first datablock when the engine is started with the sensed temperature below a lower predetermined temperature (T 1 ) determined separately from said upper predetermined temperature (T 2 ) and only switches to the second datablock when the sensed temperature exceeds the upper predetermined temperature (T 2 ); and, said switching device also being adapted to switch directly to the second datablock when the engine is started with the sensed temperature above said lower predetermined temperature (T 1 ).
Claim 3
Dependent Claim
68 words
The control device of claim 1, wherein the engine is a spark-ignition engine and said control device further comprises: a lambda probe disposed in the exhaust system of the engine for measuring the residual oxygen content of the exhaust gases; and, said second datablock being programmed for lambda control wherein the fuel quantity fed to the engine is adjusted in response to the output of said lambda probe.
Claim 4
Dependent Claim
18 words
The control device of claim 2, wherein said first datablock is programmed to operate without said lambda control.
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) | 1994-06-03 | 1994-12-03 | 1995-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-03 | 1998-12-03 | 1999-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-03 | 2002-12-03 | 2003-06-04 | $7700.00 | Window Closed / Lapsed |