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US 4,104,998 AGranted
Engine control system
AssigneeChrysler Corporation
InventorGordon W. Fenn
Life of this patent
Estimating the term…
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AssigneeChrysler Corporation
InventorGordon W. Fenn
Estimating the term…
A control system for an internal combustion engine provides controlled engine spark timing which is a function of a plurality of individual timing signals. These individual signals include a throttle advance signal, a programmed vacuum advance signal, a break-idle advance signal, an engine start advance signal, an engine speed advance signal and a fixed timing signal. These signals are algebraically summed together to develop a resultant spark timing signal representing desired spark timing. Individual signals are derived from transducer circuits which are responsive to various engine operating and/or ambient conditions. The throttle advance signal is a function of both a throttle position signal and a throttle rate signal and provides increasing advance as the throttle increasingly opens. It is also attenuated as the temperature of ambient air entering the engine for combustion increases. The programmed vacuum advance signal programs the vacuum advance in accordance with an accumulation function which is representative of the duration for which the engine has been operating in selected operating modes, namely idle and non-idle. The break-idle advance signal provides momentary advance when the engine throttle is displaced from the idle position. The engine start advance signal provides advance for a short interval after the engine has been started. The engine speed advance signal provides increasing advance as the engine speed increases. The fixed timing signal provides fixed timing which is used to adjust the basic timing for a given set of engine operating conditions. The control system is particularly advantageous when used in an engine which uses a leaner fuel-air mixture (17-18:1, for example) in comparison to presently used mixtures (15-16:1). Improvement accrues by way of reduction in exhaust emission products and better fuel economy.
In an internal combustion engine having throttle control means for controlling throttle position and having a spark ignition system including spark timing control means for controlling the engine angle at which spark ignition occurs relative to a fixed engine angle, the improvement comprising:
In an internal combustion engine having throttle control means for controlling throttle position and having a spark ignition system including spark timing control means for controlling the engine angle at which spark ignition occurs relative to a fixed engine angle, the improvement comprising:
For an internal combustion engine an improved spark timing control system, comprising:
For an internal combustion engine having a spark ignition system including a spark timing control means for controlling the engine angle at which spark ignition occurs relative to a fixed engine angle, the improvement comprising:
For an internal combustion engine having a spark ignition system including a spark timing control means for controlling the engine angle at which spark ignition occurs relative to a fixed engine angle, the improvement comprising:
For an internal combustion engine having a spark ignition system including a spark timing control means for controlling th engine angle at which spark ignition occurs relative to a fixed engine angle, the improvement comprising:
For an internal combustion engine having a spark ignition system including a spark timing control means for controlling the engine angle at which spark ignition occurs relative to a fixed engine angle, the improvement comprising:
For an internal combustion engine having a spark ignition system including a spark timing control means for controlling the engine angle at which spark ignition occurs relative to a fixed engine angle, the improvement comprising:
In an engine having a utilization system which utilizes a control signal for controlling engine operation, the improvement comprising:
In an engine having a utilization system which utilizes a control signal for controlling engine operation, the improvement comprising:
In an engine having a utilization system which utilizes a control signal for controlling engine operation, the improvement comprising:
In an engine control system the improvement comprising:
In an engine having a spark ignition system including a spark timing control means for developing a resultant spark timing signal for controlling the engine angle at which spark ignition occurs relative to a fixed engine angle, the improvement comprising:
In an engine having a spark ignition system including spark timing control means for controlling the engine angle at which spark ignition occurs relative to a fixed engine angle, the improvement comprising:
In an engine having a spark ignition system including spark timing control means for controlling the engine angle at which spark ignition occurs relative to a fixed engine angle, the improvement comprising:
In an engine having a spark ignition system including spark timing control means for controlling the engine angle at which spark ignition occurs relative to a fixed engine angle, the improvement comprising:
In a vehicle powered buy an internal combustion engine, an engine control system for providing a control signal useful in controlling the engine, said system comprising:
In a vehicle powered by an internal combustion engine, an engine spark timing control system for providing a spark timing control signal representing the time at which spark ignition should occur, said system comprising:
Dependencies are inferred from the claim text.