Method of controlling an internal combustion engine, in particular a diesel engine
First Claim
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1. A method for controlling an internal combustion engine, in particular a diesel internal combustion engine, comprising the steps of:
- forming at least one variable (HXX, H50) on a cylinder-specific basis, which variable characterizes a respective profile of a combustion in an associated combustion chamber on the basis of a measured combustion chamber pressure profile,forming an indicated mean effective pressure (IMEP) value and an indicated pressure profile from the measured combustion chamber pressure profile as a function of a crank angle of a crankshaft of the internal combustion engine,forming a variable which characterizes the combustion profile, in the form of one of an (energy) conversion point, and a combustion point (HXX, H50) or an approximation thereto from the indicated pressure profile, which variable (HXX, H50), characterizes the combustion profile and influences the time interval between a start (5) of a pilot injection (3) and the occurrence (15) of the variable (HXX, H50) andcontrolling cylinder-specific fuel injection parameters as a function of said at least one variable (HXX, H50) which characterizes the combustion profile.
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Abstract
In a method for controlling an internal combustion engine, in particular a diesel internal combustion engine, at least one variable is formed on a cylinder-specific basis, which variable characterizes a respective profile of a combustion in an associated combustion chamber, and the control of cylinder-specific fuel injection parameters is influenced as a function of said at least one variable which characterizes the combustion profile.
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Citations
12 Claims
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1. A method for controlling an internal combustion engine, in particular a diesel internal combustion engine, comprising the steps of:
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forming at least one variable (HXX, H50) on a cylinder-specific basis, which variable characterizes a respective profile of a combustion in an associated combustion chamber on the basis of a measured combustion chamber pressure profile, forming an indicated mean effective pressure (IMEP) value and an indicated pressure profile from the measured combustion chamber pressure profile as a function of a crank angle of a crankshaft of the internal combustion engine, forming a variable which characterizes the combustion profile, in the form of one of an (energy) conversion point, and a combustion point (HXX, H50) or an approximation thereto from the indicated pressure profile, which variable (HXX, H50), characterizes the combustion profile and influences the time interval between a start (5) of a pilot injection (3) and the occurrence (15) of the variable (HXX, H50) and controlling cylinder-specific fuel injection parameters as a function of said at least one variable (HXX, H50) which characterizes the combustion profile. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification