US3689753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine control systems
Assignee: ZF International UK Ltd
•
Filing: 1970-09-15
•
Granted: 1972-09-05
•
Expires: 1990-09-15
Abstract
Abstract An engine control system includes first transducer means producing a first digital signal representing a first variable parameter and second transducer means for producing a signal representing a second parameter. The first parameter changes in steps of X, and the second parameter in steps of Y. The two signals are fed to a memory store, which produces an output indicating the way in which the engine is to be controlled. In order to obtain better accuracy, at least the first digital signal is varied, for a given value of the first variable parameter, by an amount no greater than X.
Inventors
- 👤 Malcolm Williams
- 👤 Duncan Barry Hodgson
- 👤 Michael Murray Bertioli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:29
CPC Classifications
G; G06; G06F; G06F17/00; G06F17/10; G06F17/17; G06F17/175; F; F02; F02D; F02D41/00; F02D41/24; F02D41/2406; F02D41/2409; F02D41/2416; F02D9/00; F02P; F02P5/00; F02P5/04; F02P5/145; F02P5/15; G06F1/00; G06F1/02; G06F1/03; G06F1/035; F02D2700/00; F02D2700/02; F02D2700/0217; F02D2700/022; F02D2700/0223; F02D2700/0225; F02D2700/0228; F02D2700/023; F02D2700/0233; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
160 words
An engine control system for controlling the quantity of fuel supplied to the engine, said system comprising in combination first transducer means for producing a first digital signal representing the manifold pressure of the engine, said first digital signal having one of a number of values changing in steps of X, second transducer means producing a second digital signal representing engine speed, said second digital signal having one of a number of values changing in steps of Y, a memory store to which the first and second output signals are fed, said memory store being programmed to produce a pre-determined output signal dependent on the values of the two digital signals, control means operated by the output signal from the memory store for controlling the supply of fuel to the engine, and means for varying one of said digital signals, for a given value of the associated variable parameter, so as to sample different output signals from the memory store.
Claim 2
Dependent Claim
160 words
An engine control system for controlling the quantity of fuel supplied to the engine, said system comprising in combination first transducer means for producing a first digital signal representing the manifold pressure of the engine, said first digital signal having one of a number of values changing in steps of X, second transducer means producing a second digital signal representing engine speed, said second digital signal having one of a number of values changing in steps of Y, a memory store to which the first and second output signals are fed, said memory store being programmed to produce a pre-determined output signal dependent on the values of the two digital signals, control means operated by the output signal from the memory store for controlling the supply of fuel to the engine, and means for varying one of said digital signals, for a given value of the associated variable parameter, so as to sample different output signals from the memory store.
Claim 3
Dependent Claim
160 words
An engine control system for controlling the quantity of fuel supplied to the engine, said system comprising in combination first transducer means for producing a first digital signal representing the manifold pressure of the engine, said first digital signal having one of a number of values changing in steps of X, second transducer means producing a second digital signal representing throttle angle, said second digital signal having one of a number of values changing in steps of Y, a memory store to which the first and second output signals are fed, said memory store being programmed to produce a pre-determined output signal dependent on the values of the two digital signals, control means operated by the output signal from the memory store for controlling the supply of fuel to the engine, and means for varying one of said digital signals, for a given value of the associated variable parameter, so as to sample different output signals from the memory store.
Claim 4
Dependent Claim
160 words
An engine control system for controlling the quantity of fuel supplied to the engine, said system comprising in combination first transducer means for producing a first digital signal representing the manifold pressure of the engine, said first digital signal having one of a number of values changing in steps of X, second transducer means producing a second digital signal representing throttle angle, said second digital signal having one of a number of values changing in steps of Y, a memory store to which the first and second output signals are fed, said memory store being programmed to produce a pre-determined output signal dependent on the values of the two digital signals, control means operated by the output signal from the memory store for controlling the supply of fuel to the engine, and means for varying one of said digital signals, for a given value of the associated variable parameter, so as to sample different output signals from the memory store.
Claim 5
Dependent Claim
157 words
An engine control system for controlling the quantity of fuel supplied to the engine, said system comprising in combination first transducer means for producing a first digital signal representing the engine speed, said first digital signal having one of a number of values changing in steps of X, second transducer means producing a second digital signal representing throttle angle, said second digital signal having one of a number of values changing in steps of Y, a memory store to which the first and second output signals are fed, said memory store being programmed to produce a pre-determined output signal dependent on the values of the two digital signals, control means operated by the output signal from the memory store for controlling the supply of fuel to the engine, and means for varying one of said digital signals, for a given value of the associated variable parameter, so as to sample different output signals from the memory store.
Claim 6
Dependent Claim
157 words
An engine control system for controlling the quantity of fuel supplied to the engine, said system comprising in combination first transducer means for producing a first digital signal representing the engine speed, said first digital signal having one of a number of values changing in steps of X, second transducer means producing a second digital signal representing throttle angle, said second digital signal having one of a number of values changing in steps of Y, a memory store to which the first and second output signals are fed, said memory store being programmed to produce a pre-determined output signal dependent on the values of the two digital signals, control means operated by the output signal from the memory store for controlling the supply of fuel to the engine, and means for varying one of said digital signals, for a given value of the associated variable parameter, so as to sample different output signals from the memory store.
Claim 7
Dependent Claim
157 words
An engine control system for controlling the ignition timing of the engine, said system comprising in combination first transducer means for producing a first digital signal representing the manifold Pressure of the engine, said first digital signal having one of a number of values changing in steps of X, second transducer means producing a second digital signal representing engine speed, said second digital signal having one of a number of values changing in steps of Y, a memory store to which the first and second output signals are fed, said memory store being programmed to produce a pre-determined output signal dependent on the values of the two digital signals, control means operated by the output signal from the memory store for controlling the ignition timing of the engine, and means for varying one of said digital signals, for a given value of the associated variable parameter, so as to sample different output signals from the memory store.
Claim 8
Dependent Claim
157 words
An engine control system for controlling the ignition timing of the engine, said system comprising in combination first transducer means for producing a first digital signal representing the manifold Pressure of the engine, said first digital signal having one of a number of values changing in steps of X, second transducer means producing a second digital signal representing engine speed, said second digital signal having one of a number of values changing in steps of Y, a memory store to which the first and second output signals are fed, said memory store being programmed to produce a pre-determined output signal dependent on the values of the two digital signals, control means operated by the output signal from the memory store for controlling the ignition timing of the engine, and means for varying one of said digital signals, for a given value of the associated variable parameter, so as to sample different output signals from the memory store.
Claim 9
Dependent Claim
157 words
An engine control system for controlling the ignition timing of the engine, said system comprising in combination first transducer means for producing a first digital signal representing the manifold pressure of the engine, said first digital signal having one of a number of values changing in steps of X, second transducer means producing a second digital signal representing throttle angle, said second digital signal having one of a number of values changing in steps of Y, a memory store to which the first and second output signals are fed, said memory store being programmed to produce a pre-determined output signal dependent on the values of the two digital signals, control means operated by the output signal from the memory store for controlling the ignition timing of the engine, and means for varying one of said digital signals, for a given value of the associated variable parameter so as to sample different output signals from the memory store.
Claim 10
Dependent Claim
157 words
An engine control system for controlling the ignition timing of the engine, said system comprising in combination first transducer means for producing a first digital signal representing the manifold pressure of the engine, said first digital signal having one of a number of values changing in steps of X, second transducer means producing a second digital signal representing throttle angle, said second digital signal having one of a number of values changing in steps of Y, a memory store to which the first and second output signals are fed, said memory store being programmed to produce a pre-determined output signal dependent on the values of the two digital signals, control means operated by the output signal from the memory store for controlling the ignition timing of the engine, and means for varying one of said digital signals, for a given value of the associated variable parameter so as to sample different output signals from the memory store.
Claim 11
Dependent Claim
154 words
An engine control system for controlling the ignition timing of the engine, said system comprising in combination first transducer means for producing a first digital signal representing the engine speed, said first digital signal having one of a number of values changing in steps of X, second transducer means producing a second digital signal representing throttle angle, said second digital signal having one of a number of values changing in steps of Y, a memory store to which the first and second output signals are fed, said memory store being programmed to produce a pre-determined output signal dependent on the values of the two digital signals, control means operated by the output signal from the memory store for controlling the ignition timing of the engine, and means for varying one of said digital signals for a given value of the associated variable parameter, so as to sample different output signals from the memory store.
Claim 12
Dependent Claim
154 words
An engine control system for controlling the ignition timing of the engine, said system comprising in combination first transducer means for producing a first digital signal representing the engine speed, said first digital signal having one of a number of values changing in steps of X, second transducer means producing a second digital signal representing throttle angle, said second digital signal having one of a number of values changing in steps of Y, a memory store to which the first and second output signals are fed, said memory store being programmed to produce a pre-determined output signal dependent on the values of the two digital signals, control means operated by the output signal from the memory store for controlling the ignition timing of the engine, and means for varying one of said digital signals for a given value of the associated variable parameter, so as to sample different output signals from the memory store.
References Cited (Backward Citations)
US2925220A
Cited
US3010656A
Cited
US3110802A
Cited
US3345505A
Cited
US3412240A
Cited
US3474667A
Cited
US3472066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |