Method for closed-loop control of the ignition angle or the composition of the operational mixture furnished an internal combustion engine
AssigneeRobert Bosch GmbH
InventorReinhard Latsch
Life of this patent
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Abstract
A method is proposed for the closed-loop control of the composition of the operational mixture furnished an internal combustion engine, in which the location of the peak combustion chamber pressure is ascertained relative to top dead center during sequential work cycles and a control signal is formed from the fluctuations in the occurrance of the peak combustion chamber pressure from top dead center, by means of which control signal a permissible extent of fluctuation is established by means of influencing components of the operational mixture or the ignition angle.
Claims6
A method of closed-loop control for the composition of an operational mixture furnished to an internal combustion engine for combustion therein, comprising the steps of:
- ascertaining the occurrence of the top dead center in sequential work cycles of at least one combustion chamber of the engine;
- measuring the magnitude of the combustion chamber pressure of said at least one combusting chamber with a pressure probe;
- ascertaining the occurrence of the peak combustion chamber pressure from the measured magnitude of the combustion chamber pressure, relative to the ascertained top dead center occurrence in sequential work cycles of said at least one combustion chamber;
- generating a control signal as a function of the difference between two successive occurrences of the peak combustion chamber pressure relative to the occurrence of the top dead center in sequential work cycles of said at least one combustion chamber;
- generating a set-point value for the control signal;
- comparing the generated control signal to the generated set-point value and generating a difference signal;
- and
- adjusting the proportion of at least one component of the operational mixture in accordance with the generated difference signal.
A method of closed-loop control of the ignition angle of an internal combustion engine comprising the steps of:
- ascertaining the occurrence of the top dead center in sequential work cycles of at least one combustion chamber of the engine;
- measuring the magnitude of the combustion chamber pressure of said at least one combustion chamber with a pressure probe;
- ascertaining the occurrence of the peak combustion chamber pressure from the measured magnitude of the combustion chamber pressure, relative to the ascertained top dead center occurrence in sequential work cycles of said at least one combustion chamber;
- generating a control signal as a function of the difference between two successive occurrences of the peak combustion chamber pressure relative to the occurrence of the top dead center in sequential work cycles of said at least one combustion chamber;
- generating a set-point value for the control signal;
- comparing the generated control signal to the generated set-point value and generating a difference signal;
- and
- adjusting the ignition angle in accordance with the generated difference signal.
Dependencies are inferred from the claim text.