Method for operating an internal combustion engine
First Claim
Patent Images
1. A method for operating an internal combustion engine, the method comprising:
- determining, via a processor, a speed-based feature of the internal combustion engine, which is correlated with an indicated mean effective pressure of at least one combustion chamber, during the warm-up of the internal combustion engine; and
ascertaining, via the processor, an ideal fuel quantity, which is to be injected into the at least one combustion chamber of the internal combustion engine during the warm-up of the internal combustion engine therefrom;
wherein the speed-based feature is determined for different quantities of injected fuel to ascertain the ideal quantity, wherefrom a characteristic of the speed-based feature results over the injected quantity, and wherein the injected fuel quantity is ascertained as the ideal quantity in which a value of a derivative of the characteristic corresponds to a threshold value.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for operating an internal combustion engine in which a speed-based feature of the internal combustion engine, which is correlated with an indicated mean effective pressure of the fuel, is determined during the warm-up of the internal combustion engine and an ideal fuel quantity, which is to be injected into at least one combustion chamber of the internal combustion engine during the warm-up, is ascertained therefrom.
-
Citations
23 Claims
-
1. A method for operating an internal combustion engine, the method comprising:
-
determining, via a processor, a speed-based feature of the internal combustion engine, which is correlated with an indicated mean effective pressure of at least one combustion chamber, during the warm-up of the internal combustion engine; and ascertaining, via the processor, an ideal fuel quantity, which is to be injected into the at least one combustion chamber of the internal combustion engine during the warm-up of the internal combustion engine therefrom; wherein the speed-based feature is determined for different quantities of injected fuel to ascertain the ideal quantity, wherefrom a characteristic of the speed-based feature results over the injected quantity, and wherein the injected fuel quantity is ascertained as the ideal quantity in which a value of a derivative of the characteristic corresponds to a threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method for operating an internal combustion engine, the method comprising:
-
determining, via a processor, a speed-based feature of the internal combustion engine, which is correlated with an indicated mean effective pressure of at least one combustion chamber, during the warm-up of the internal combustion engine; and ascertaining, via the processor, an ideal fuel quantity, which is to be injected into the at least one combustion chamber of the internal combustion engine during the warm-up of the internal combustion engine therefrom; wherein the speed-based feature represents a mechanical work of the internal combustion engine.
-
-
10. A method for operating an internal combustion engine, the method comprising:
-
determining, via a processor, a speed-based feature of the internal combustion engine, which is correlated with an indicated mean effective pressure of at least one combustion chamber the fuel, during the warm-up of the internal combustion engine; and ascertaining, via the processor, an ideal fuel quantity, which is to be injected into the at least one combustion chamber of the internal combustion engine during the warm-up of the internal combustion engine therefrom; wherein a previously applied value, which is a function of at least one operating parameter of the internal combustion engine, is used as the initial value for the quantity of fuel to be injected. - View Dependent Claims (11)
-
-
12. A system for operating an internal combustion engine, comprising:
-
a determining arrangement to determine, during a warm-up of the internal combustion engine, a speed-based feature of the internal combustion engine, which is correlated with an indicated mean effective pressure of at least one combustion chamber; an ascertaining arrangement to ascertain therefrom an ideal fuel quantity, which is to be injected into the at least one combustion chamber of the internal combustion engine during the warm-up of the internal combustion engine; and injecting the ideal fuel quantity during the warm-up of the internal combustion engine; wherein the speed-based feature is determined for different quantities of injected fuel to ascertain the ideal quantity, wherefrom a characteristic of the speed-based feature results over the injected quantity, and wherein the injected fuel quantity is ascertained as the ideal quantity in which a value of a derivative of the characteristic corresponds to a threshold value. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
-
Specification