초록 ▼

The invention is directed to a method and an arrangement for controlling an internal combustion engine (1) having a compressor (5) for compressing the air drawn in by suction by the engine (1). The compressor is especially an exhaust-gas turbocharger. With the method and arrangement, a requirement-p

The invention is directed to a method and an arrangement for controlling an internal combustion engine (1) having a compressor (5) for compressing the air drawn in by suction by the engine (1). The compressor is especially an exhaust-gas turbocharger. With the method and arrangement, a requirement-proper and timely opening of a valve (10) of an air path (15) is ensured for avoiding compressor pumping. The air path (15) bypasses the compressor (5). The valve (10) of the air path (15), which bypasses the compressor (5), is controlled in dependence upon at least one pregiven characteristic line (20, 25) of a compressor characteristic field.

대표청구항 ▼

What is claimed is: 1. A method for controlling an internal combustion engine having a compressor for compressing the air inducted by the engine, the method comprising the step of controlling a valve of an air path bypassing said compressor in dependence upon at least one pregiven characteristic li

What is claimed is: 1. A method for controlling an internal combustion engine having a compressor for compressing the air inducted by the engine, the method comprising the step of controlling a valve of an air path bypassing said compressor in dependence upon at least one pregiven characteristic line of a compressor characteristic field. 2. The method of claim 1, comprising the further step of inputting a pressure ratio (vpvdkpu) across said compressor in dependence upon a desired air volume flow (vldes) utilizing said at least one pregiven characteristic line. 3. The method of claim 1, wherein the at least one pregiven characteristic line is selected as a pump limit of the compressor characteristic field. 4. The method of claim 1, wherein said compressor is an exhaust-gas turbocharger. 5. A method for controlling an internal combustion engine having a compressor for compressing the air inducted by the engine, the method comprising the step of directly controlling a valve of an air path bypassing said compressor in dependence upon at lease one pregiven characteristic line of a compressor characteristic field. 6. A method for controlling an internal combustion engine having a compressor for compressing the air inducted by the engine, the method comprising the steps of: controlling a valve of an air path bypassing said compressor in dependence upon at least one pregiven characteristic line of a compressor characteristic field; inputting a pressure ratio (vpvdkpu) across said compressor in dependence upon a desired air volume flow (vldes) utilizing said at least one pregiven characteristic line; and, opening said valve when an actual value (vpvdkpuact) of the pressure ratio exceeds the pressure ratio (vpvdkpu) pregiven by said one pregiven characteristic line. 7. A method for controlling an internal combustion engine having a compressor for compressing the air inducted by the engine, the method comprising the steps of: controlling a valve of an air path bypassing said compressor in dependence upon at least one pregiven characteristic line of a compressor characteristic field; inputting a pressure ratio (vpvdkpu) across said compressor in dependence upon a desired air volume flow (vldes) utilizing said at least one pregiven characteristic line; and, wherein said pregiven characteristic line is a first characteristic line of said compressor characteristic field and said characteristic field has a pregiven second characteristic line; and, said valve is closed when an actual value (vpvdkpuact) of said pressure ratio falls below the pressure ratio pregiven by said second pregiven characteristic line. 8. A method for controlling an internal combustion engine having a compressor for compressing the air inducted by the engine, the method comprising the steps of: controlling a valve of an air path bypassing said compressor in dependence upon at least one pregiven characteristic line of a compressor characteristic field; inputting a pressure ratio (vpvdkpu) across said compressor in dependence upon a desired air volume flow (vldes) utilizing said at least one pregiven characteristic line; and, wherein the desired air volume flow (vldes) is computed from a desired air mass flow (mldes) and an instantaneous air density (ρ). 9. The method of claim 8, wherein the instantaneous air density (ρ) is computed in dependence upon the ambient temperature (Tumg) and the ambient pressure (pu). 10. A method for controlling an internal combustion engine having a compressor for compressing the air inducted by the engine, the method comprising the steps of: controlling a valve of an air path bypassing said compressor in dependence upon at least one pregiven characteristic line of a compressor characteristic field; inputting a pressure ratio (vpvdkpu) across said compressor in dependence upon a desired air volume flow (vldes) utilizing said at least one pregiven characteristic line; and, wherein the desired air volume flow (vldes) is temperature corrected. 11. An arrangement for controlling an internal combustion engine having a compressor for compressing the air inducted by said engine, the arrangement comprising: an air path bypassing said compressor and including a valve; and, means for driving said valve in dependence upon at least a pregiven characteristic line of a characteristic field of said compressor. 12. The arrangement of claim 11, wherein said compressor is an exhaust-gas turbocharger.