Method for operating an internal combustion engine and device for executing the method
First Claim
1. A method for operating an internal combustion engine, a throttle valve being situated in an intake port and an exhaust emission control device being situated in an exhaust duct, the method comprising:
- setting a predefined air flow setpoint value using the throttle valve;
providing at least one control signal of the internal combustion engine on the basis of a first dataset stored in a characteristics map;
changing the air flow setpoint value predefined for the throttle valve following an occurrence of a request for at least one of heating and regenerating the exhaust emission control device;
performing a first diagnosis of the throttle valve;
providing a first error signal when a throttle valve error is detected; and
making a switch to an additional dataset in the characteristics map when the first error signal and the request are present,wherein the at least one control signal is provided on the basis of the additional dataset.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for operating an internal combustion engine and a device for executing the method which are based on the fact that a throttle valve is situated in the intake port and an exhaust emission control device is situated in the exhaust system. The air flow setpoint value for the throttle valve is changed following occurrence of a request for heating and/or regenerating the exhaust emission control device. A first diagnostics of the throttle valve provides an error signal in the event of a throttle valve error. When the error signal and the request are present, a switch is made in a characteristics map from a first or a second dataset to an additional dataset on the basis of which at least one control signal of the internal combustion engine is provided.
8 Citations
9 Claims
-
1. A method for operating an internal combustion engine, a throttle valve being situated in an intake port and an exhaust emission control device being situated in an exhaust duct, the method comprising:
-
setting a predefined air flow setpoint value using the throttle valve; providing at least one control signal of the internal combustion engine on the basis of a first dataset stored in a characteristics map; changing the air flow setpoint value predefined for the throttle valve following an occurrence of a request for at least one of heating and regenerating the exhaust emission control device; performing a first diagnosis of the throttle valve; providing a first error signal when a throttle valve error is detected; and making a switch to an additional dataset in the characteristics map when the first error signal and the request are present, wherein the at least one control signal is provided on the basis of the additional dataset. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A device for operating an internal combustion engine, a throttle valve being situated in an intake port and an exhaust emission control device being situated in an exhaust duct, the device comprising:
-
means for setting a predefined air flow setpoint value using the throttle valve; means for providing at least one control signal of the internal combustion engine on the basis of a first dataset stored in a characteristics map; means for changing the air flow setpoint value predefined for the throttle valve following an occurrence of a request for at least one of heating and regenerating the exhaust emission control device; means for performing a first diagnosis of the throttle valve; means for providing a first error signal when a throttle valve error is detected; and means for making a switch to an additional dataset in the characteristics map when the first error signal and the request are present, wherein the at least one control signal is provided on the basis of the additional dataset.
-
Specification