US4603668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling the rotational speed of an internal combustion engine
Assignee: Bosch Corp
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Filing: 1984-05-03
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Granted: 1986-08-05
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Expires: 2004-05-03
Abstract
Abstract An apparatus for controlling the rotational speed of an internal combustion engine has a circuit for producing a signal corresponding to the difference between the actual engine speed and the target engine speed and a processor for weighting this signal by a factor that continuously changes according to the magnitude of the difference. The weighted signal is converted to a control signal for adjusting the speed of the engine.
Inventors
- 👤 Masahito Ueno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:19
CPC Classifications
B; B60; B60K; B60K31/00; B60K31/02; B60K31/04; B60K31/042; B60K31/045; B60K31/047
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
196 words
An apparatus for controlling the rotational speed of an internal combustion engine by employing a closed loop, comprising: a first means for producing first data indicative of a target engine speed; a second means for producing second data indicative of the actual engine speed at each instant; a deviation detecting means responsive to said first and second data for detecting the amount of deviation of the actual engine speed from the target engine speed and outputting a deviation signal corresponding to said deviation; a first computing means for computing the absolute value of the deviation; a second computing means for computing a predetermined function of N degrees (N≧2) of the deviation; means for discriminating the magnitude of the deviation; a selecting means for selecting either the computed result from the first computing means or the result from the second computing means in response to the result of the discrimination of said discriminating means; a generating means for generating a control signal in response to the output from said selecting means; and means responsive to the control signal for adjusting a member for adjusting the speed of the internal combustion engine so that the deviation becomes zero.
Claim 2
Independent Claim
196 words
An apparatus for controlling the rotational speed of an internal combustion engine by employing a closed loop, comprising: a first means for producing first data indicative of a target engine speed; a second means for producing second data indicative of the actual engine speed at each instant; a deviation detecting means responsive to said first and second data for detecting the amount of deviation of the actual engine speed from the target engine speed and outputting a deviation signal corresponding to said deviation; a first computing means for computing the absolute value of the deviation; a second computing means for computing a predetermined function of N degrees (N≧2) of the deviation; means for discriminating the magnitude of the deviation; a selecting means for selecting either the computed result from the first computing means or the result from the second computing means in response to the result of the discrimination of said discriminating means; a generating means for generating a control signal in response to the output from said selecting means; and means responsive to the control signal for adjusting a member for adjusting the speed of the internal combustion engine so that the deviation becomes zero.
Claim 3
Dependent Claim
86 words
An apparatus as claimed in claim 1, wherein said discriminating means is adapted to discriminate whether or not the absolute value of the deviation is more than a predetermined value, the computed result from said first computing means is selected by said selecting means when the absolute value of the deviation is not more than a predetermined value and the computed result of said second computing means is selected by said selecting means when the absolute value of the deviation is more than the predetermined value.
Claim 4
Dependent Claim
43 words
An apparatus as claimed in claim 1, wherein signal processing for PID control is effected on the output from said selecting means by said generating means in response to a signal indicative of the deviation and the processed output from said selecting means.
Claim 5
Dependent Claim
43 words
An apparatus as claimed in claim 1, wherein signal processing for PID control is effected on the output from said selecting means by said generating means in response to a signal indicative of the deviation and the processed output from said selecting means.
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) | 1989-08-04 | 1990-02-03 | 1990-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-04 | 1994-02-03 | 1994-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-04 | 1998-02-03 | 1998-08-05 | $7700.00 | Window Closed / Lapsed |