Patent US4793308A successfully refreshed from Google Patents.
US4793308A
Expired / Lapsed
US
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Emergency control device for a diesel internal combustion engine with electronically controlled fuel proportioning
Assignee: Robert Bosch GmbH
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Filing: 1986-11-05
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Granted: 1988-12-27
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Expires: 2006-11-05
Abstract
Abstract An emergency control device for a diesel internal combustion engine with electronically controlled fuel proportioning, which enables an optimal emergency driving operation in case of a defect of the transmitter or transmitters for the actual value of fuel volume. In the event of an error, the mechanism determining the desired value of fuel volume during normal operation, and the fuel volume regulating device, are separated from the fuel proportioning device and the latter is controlled by a special emergency driving signal. An error in the transmitters for the actual value of fuel volume is recognized in that this signal does not fall in the allowable area for the actual value of fuel volume. A first signal, which, together with a second signal, gives the emergency driving signal, is formed from the speed and the accelerator position. The second signal consists substantially of the differentiated speed signal.
Inventors
- 👤 Jurgen Brauninger
- 👤 Wolfgang Duhlmeyer
- 👤 Gunter Kettenacker
- 👤 Volker Schafer
- 👤 Albrecht Sieber
- 👤 Jurgen Wietelmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:04
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/24; F02D41/26; F02D41/266; F02D41/22; F02D41/222; F02D41/30; F02D41/38; F02B; F02B3/00; F02B3/06; F02D2041/224; F02D2041/226; F02D2041/227
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
197 words
Emergency control device for a diesel internal combustion engine, comprising an electronically controlled fuel proportioning device, transmitters for speed, for drive pedal position and for a volume of fuel fed to the internal combustion engine, means for determining an actual value of fuel volume from transmitter signals, means for determining a desired value of fuel volume at least from signals of the drive pedal position transmitter and the speed transmitter, means for monitoring the means for determining the actual value of fuel volume, switching devices, which in case of error in the means for determining the actual value of fuel volume, eliminate the influence of fuel volume controlling means and the desired value of fuel volume on the fuel proportioning device and connect the fuel proportioning device with an emergency control signal formed from the signals of said speed transmitter and the drive pedal position transmitter, the improvement comprises that a first signal is formed from the drive pedal position transmitter signal and the speed signal, a second signal is formed from a speed signal, which is at least weighted, and the emergency control signal is a function of a difference between the first and second signals.
Claim 2
Dependent Claim
197 words
Emergency control device for a diesel internal combustion engine, comprising an electronically controlled fuel proportioning device, transmitters for speed, for drive pedal position and for a volume of fuel fed to the internal combustion engine, means for determining an actual value of fuel volume from transmitter signals, means for determining a desired value of fuel volume at least from signals of the drive pedal position transmitter and the speed transmitter, means for monitoring the means for determining the actual value of fuel volume, switching devices, which in case of error in the means for determining the actual value of fuel volume, eliminate the influence of fuel volume controlling means and the desired value of fuel volume on the fuel proportioning device and connect the fuel proportioning device with an emergency control signal formed from the signals of said speed transmitter and the drive pedal position transmitter, the improvement comprises that a first signal is formed from the drive pedal position transmitter signal and the speed signal, a second signal is formed from a speed signal, which is at least weighted, and the emergency control signal is a function of a difference between the first and second signals.
Claim 3
Dependent Claim
29 words
Emergency control device according to claim 1, further including a low-pass filter for limiting and filtering the signal from the pedal drive position transmitter in the case of error.
Claim 4
Dependent Claim
18 words
Emergency control device according to claim 1, wherein the second signal is obtained from a differentiated speed signal.
Claim 5
Dependent Claim
22 words
Emergency control device according to claim 3, wherein the speed signal is weighted differently, according to a speed range, prior to differentiation.
Claim 6
Dependent Claim
41 words
Emergency control device according to claim 1, wherein the emergency control signal is influenced by a signal which is proportional to an operating point of an injection pump and a signal which adapts to the operating point of the injection pump.
Claim 7
Dependent Claim
39 words
Emergency control device according to claim 5, wherein the first signal is fed to an integrator, which acts as a bypass integrator, via a first limiting means for the purpose of adapting the operating point of the injection pump.
Claim 8
Dependent Claim
27 words
Emergency control device according to claim 6, wherein an output signal of the bypass integrator is connected with the emergency control signal via a second limiting means.
Claim 9
Dependent Claim
20 words
Emergency control device according to claim 7, wherein the first and second limiting means are dependent on the coolant temperature.
Claim 10
Dependent Claim
20 words
Emergency control device according to claim 7, wherein the first and second limiting means are dependent on the fuel temperature.
Claim 11
Dependent Claim
23 words
Emergency control device according to claim 1, wherein a range of the signal for the actual value signal of fuel volume is monitored.
Claim 12
Dependent Claim
25 words
Emergency control device according to claim 10, wherein the range of the signal for the actual value of fuel volume is monitored at speed-dependent values.
Claim 13
Dependent Claim
27 words
Emergency control device according to claim 10, wherein the signal for the actual value of fuel volume is obtained from a position of a control distance transmitter.
Claim 14
Dependent Claim
28 words
Emergency control device according to claim 10, wherein the signal for the actual value of the fuel volume is obtained from a signal of a needle stroke transmitter.
Claim 15
Dependent Claim
34 words
Emergency control device according to claim 10, wherein the signal for the actual value of the fuel volume is obtained from a signal of a pressure sensor which is exposed to a fuel pressure.
Claim 16
Dependent Claim
22 words
Emergency control device according to claim 10 wherein the signal range of the actual value for fuel volume is dependent on temperature.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-27 | 1992-06-27 | 1992-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-27 | 1996-06-27 | 1996-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-27 | 2000-06-27 | 2000-12-27 | $7700.00 | Window Closed / Lapsed |