US4509488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for intermittent control of a cyclically operating internal combustion engine
Assignee: Daimler Benz AG
•
Filing: 1982-07-12
•
Granted: 1985-04-09
•
Expires: 2002-07-12
Abstract
Abstract A process for intermittent control of a cyclically operating internal combustion engine wherein, in the succession of working cycles, working strokes are skipped--in approximately uniform distribution--and the number of skips is varied in dependence on the load. Fuel is fed in a controlled fashion only to the nonskipping working chambers of the internal combustion engine independently of the load in a constant quantity optimal for consumption. For a sensitive power distribution, especially in the low load range, the number of skips is varied chronologically at least approximately randomly and independently of the speed, i.e., the temporal density of the working strokes is varied. This can be accomplished by setting differently finely staggered firing patterns or by a stochastic ignition setting.
Inventors
- 👤 Hans-Joachim Forster
- 👤 Bernd-Eric Lubbing
- 👤 Ulrich Letsche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:14
CPC Classifications
F; F02; F02P; F02P9/00; F02P9/002; F02D; F02D41/00; F02D41/008; F02D41/0087
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
97 words
A process for intermittent control of a cyclically operating internal combustion engine having plural working chambers, the steps comprising: skipping working strokes in the succession of working cycles; distributing the skipped working strokes stochastically among the various working chambers; distributing the skipped working strokes approximately uniformly in time; varying the number of skipped working strokes in dependence on the load and independently of the number of revolutions; and feeding fuel in a controlled fashion only respectively to the nonskipped working chambers of the internal combustion engine independently of the load in a constant amount per working stroke.
Claim 2
Dependent Claim
97 words
A process for intermittent control of a cyclically operating internal combustion engine having plural working chambers, the steps comprising: skipping working strokes in the succession of working cycles; distributing the skipped working strokes stochastically among the various working chambers; distributing the skipped working strokes approximately uniformly in time; varying the number of skipped working strokes in dependence on the load and independently of the number of revolutions; and feeding fuel in a controlled fashion only respectively to the nonskipped working chambers of the internal combustion engine independently of the load in a constant amount per working stroke.
Claim 3
Dependent Claim
23 words
A process according to claim 1, wherein the skips are distributed temporally approximately uniformly among the working chambers of the internal combustion engine.
Claim 4
Dependent Claim
131 words
A process for intermittent control of a cyclically operating internal combustion engine having plural working chambers, the steps comprising: skipping working strokes in the succession of working cycles; distributing the skipped working strokes approximately uniformly in time; varying the number of skipped working strokes in dependence on the load and independently of the number of revolutions; feeding fuel in a controlled fashion only respectively to the nonskipped working chambers of the internal combustion engine independently of the load in a constant amount per working stroke, and varying the number of skipped working strokes between 0 skips per actual working stroke and about five to seven times z, where z is the number of different working chambers of the internal combustion engine, and distributing the skips stochastically among the various working chambers.
Claim 5
Dependent Claim
131 words
A process for intermittent control of a cyclically operating internal combustion engine having plural working chambers, the steps comprising: skipping working strokes in the succession of working cycles; distributing the skipped working strokes approximately uniformly in time; varying the number of skipped working strokes in dependence on the load and independently of the number of revolutions; feeding fuel in a controlled fashion only respectively to the nonskipped working chambers of the internal combustion engine independently of the load in a constant amount per working stroke, and varying the number of skipped working strokes between 0 skips per actual working stroke and about five to seven times z, where z is the number of different working chambers of the internal combustion engine, and distributing the skips stochastically among the various working chambers.
Claim 6
Dependent Claim
41 words
A process according to one of claim 1, further comprising the step of storing intermediately the mechanical energy delivered by the internal combustion engine in a manner compensating for torque surges and speed fluctuations prior to being transmitted to a load.
References Cited (Backward Citations)
US2771867A
Cited
US4040395A
Cited
US4153033A
Cited
US4146006A
Cited
US4103655A
Cited
US4227505A
Cited
US4328546A
Cited
US4391255A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-08 | 1988-10-08 | 1989-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-08 | 1992-10-08 | 1993-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-08 | 1996-10-08 | 1997-04-09 | $7700.00 | Window Closed / Lapsed |