US4656986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for modifying operation of regulator for setting fuel quantity in an internal combustion engine operating with self-ignition
Assignee: Robert Bosch GmbH
•
Filing: 1984-11-09
•
Granted: 1987-04-14
•
Expires: 2004-11-09
Abstract
Abstract Disclosed is a jolt damping circuit for use in fuel metering systems of an internal combustion engine having self-ignition. The jolt damping circuit includes a guide regulator, a device for generating a jolt disturbance signal in dependency on the rotary speed of the engine, and means for combining the output signal from the guide generator and from the jolt disturbance signal generator to produce a desired value setting signal applicable to regulating means for the setting member of a fuel injection pump. The jolt damping circuit is directly connectable into a standard fuel metering system of a motor vehicle.
Inventors
- 👤 Hermann Kull
- 👤 Wilfried Sautter
- 👤 Wolf Wessel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:41
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/3005; F02D41/38; F02D2200/00; F02D2200/02; F02D2200/04; F02D2200/0404
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
155 words
A device for regulating a fuel metering system of a diesel engine comprising: sensing means including a gas pedal position sensor and a rotary speed sensor; an end stage regulator for controlling a fuel quantity setting member; means for producing in response to signals from said sensing means a nominal signal corresponding to a desired fuel quantity; jolt damping means connected between said producing means and said end stage regulator, said jolt damping means including a guide regulator for adjusting said nominal signal and means for generating a modifying signal corresponding to low frequency fluctuations of rotary speed of the engine; means for combining said nominal signal and said modifying signal to produce a modified nominal signal, said combining means being directly coupled to said end stage regulator to counteract said fluctuations by a corresponding change in the adjusted fuel quantity; and means for limiting the rise of said modifying signal to a preset value.
Claim 2
Independent Claim
155 words
A device for regulating a fuel metering system of a diesel engine comprising: sensing means including a gas pedal position sensor and a rotary speed sensor; an end stage regulator for controlling a fuel quantity setting member; means for producing in response to signals from said sensing means a nominal signal corresponding to a desired fuel quantity; jolt damping means connected between said producing means and said end stage regulator, said jolt damping means including a guide regulator for adjusting said nominal signal and means for generating a modifying signal corresponding to low frequency fluctuations of rotary speed of the engine; means for combining said nominal signal and said modifying signal to produce a modified nominal signal, said combining means being directly coupled to said end stage regulator to counteract said fluctuations by a corresponding change in the adjusted fuel quantity; and means for limiting the rise of said modifying signal to a preset value.
Claim 3
Dependent Claim
54 words
A device as defined in claim 1, wherein the guide regulator includes a regulator and a combining device connected to the regulator, the combining device having an input connected to the output of the producing means and another input coupled to the end stage regulator to receive a feed back signal from the latter.
Claim 4
Dependent Claim
18 words
A device as defined in claim 2, wherein the guide regulator includes a regulator having a PI behavior.
Claim 5
Dependent Claim
30 words
A device as defined in claim 2, wherein a phase shifter is connected to the other input of the combining device to shift the phase of the feed back signal.
Claim 6
Dependent Claim
20 words
A device as defined in claim 4, wherein the phase shifter is in the form of a low pass filter.
Claim 7
Dependent Claim
29 words
A device as defined in claim 1, wherein said generating means includes a phase shifter for generating said modifying signal from the output signal of the rotary speed sensor.
Claim 8
Dependent Claim
32 words
A device as defined in claim 6, further comprising a signal shaping device connected to the phase shifter to produce a disturbance signal which is dependent on fast changes of rotary speed.
Claim 9
Dependent Claim
20 words
A device as defined in claim 6, wherein the phase shifter is in the form of a high pass filter.
Claim 10
Dependent Claim
21 words
A device as defined in claim 7, wherein the signal shaper includes a signal slope limitor having a signal insensitive zone.
Claim 11
Dependent Claim
33 words
A device as defined in claim 1, wherein the guide regulator includes a guide signal shaper, and said generating means including two phase shifters and a signal shaper connected between said phase shifters.
Claim 12
Dependent Claim
15 words
A device as defined in claim 10, wherein the guide shaper has PDT 1 behavior.
Claim 13
Dependent Claim
19 words
A device as defined in claim 10, wherein each of the two phase shifters is a high pass filter.
Claim 14
Dependent Claim
26 words
A device as defined in claim 10, wherein the signal shaper connected between the two phase shifters is a signal slope limiter having an insensitive zone.
Claim 15
Dependent Claim
28 words
A device as defined in claim 1, wherein said sensing means includes a temperature sensor, and a shifted gear sensor to produce signals applicable to the modifying device.
Claim 16
Dependent Claim
43 words
A device as defined in claim 1, comprising a signal converter connected between the sensing means and the modifying means to convert when the rotary speed drops below a predetermined value, the output signal from the rotary speed sensor into a constant signal.
References Cited (Backward Citations)
US4329960A
Cited
US4343278A
Cited
US4377998A
Cited
US4428341A
Cited
US4471735A
Cited
US4538571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-13 | 1990-10-13 | 1991-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-13 | 1994-10-13 | 1995-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-13 | 1998-10-13 | 1999-04-14 | $7700.00 | Window Closed / Lapsed |