Process and apparatus for controlling the combustion course in an Otto combustion engine
First Claim
1. Process for controlling combustion in an Otto combustion engine, wherein control variables for controlling a combustion course for a particular power cycle are determined using a control device, as a function of a detected combustion course of a preceding power cycle, said process comprising the steps of:
- precalculating a desired value for a burn-through function for a particular power cycle during its charge cycle phase, based on actual values of burn-through function influence factors detected during a preceding power cycle, by integrating the combustion course during the preceding power cycle with respect to either time or crank angle;
determining in real time an actual burn-through function value during a high-pressure phase of a particular power cycle using a neuronal network which receives as inputs one or several quantities representative of the combustion course;
comparing the precalculated desired burn-through function value with the actual burn-through function value; and
based on a result of said comparing, controlling combustion in the Otto combustion engine based on determined actualized values for the burn-through function influence factors on which a combustion-controlling determination of control variable values for a subsequent power cycle is based.
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Abstract
The invention provides a process and apparatus for controlling combustion in an Otto combustion engine in which the control variables that control combustion are determined for a particular power cycle as a function of the detected combustion course of a preceding power cycle. According to the invention, a desired burn-through function value for a particular power cycle is precalculated based on values of pertaining influence factors detected in a preceding power cycle, to determine an actual burn-through function value of the particular power cycle in real time. The desired burn-through function is compared with the actual burn-through function and actualized values for the burn-through function influence factors are determined. These factors are used to determine the control variable values for a subsequent power cycle.
24 Citations
7 Claims
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1. Process for controlling combustion in an Otto combustion engine, wherein control variables for controlling a combustion course for a particular power cycle are determined using a control device, as a function of a detected combustion course of a preceding power cycle, said process comprising the steps of:
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precalculating a desired value for a burn-through function for a particular power cycle during its charge cycle phase, based on actual values of burn-through function influence factors detected during a preceding power cycle, by integrating the combustion course during the preceding power cycle with respect to either time or crank angle; determining in real time an actual burn-through function value during a high-pressure phase of a particular power cycle using a neuronal network which receives as inputs one or several quantities representative of the combustion course; comparing the precalculated desired burn-through function value with the actual burn-through function value; and based on a result of said comparing, controlling combustion in the Otto combustion engine based on determined actualized values for the burn-through function influence factors on which a combustion-controlling determination of control variable values for a subsequent power cycle is based. - View Dependent Claims (2, 3)
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4. Device for controlling combustion in an Otto combustion engine, comprising:
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a first unit for detecting actual engine condition variables; a second unit whose output signal controls adjustment of engine control elements; a third unit for precalculating a desired value of a burn-through function during a power cycle charge cycle phase, based on actual engine condition variables detected by said first unit by integrating the combustion course during the preceding power cycle with respect to either time or crank angle; a fourth unit for determining an actual burn-through function value during a power cycle high-pressure phase using a neuronal network which receives as inputs one or several quantities representative of the combustion course; and a fifth unit for determining influence factor values associated with the determined actual burn-through function values, by a comparison of the precalculated desired burn-through function value with the determined actual burn-through function value, an output of said fifth unit being provided to said second unit; a sixth unit for controlling combustion in the Otto combustion engine based on determined actualized values for the burn-through function influence factors on which a combustion-controlling determination of control variable values for a subsequent power cycle is based. - View Dependent Claims (5, 6, 7)
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Specification