SUPERCHARGED INTERNAL COMBUSTION ENGINE AND METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE OF SAID TYPE
First Claim
1. A supercharged internal combustion engine, comprising:
- a cylinder;
an intake line in an intake system, for supplying charge air to the cylinder;
an exhaust line for discharging exhaust gases;
an exhaust-gas turbocharger including a turbine arranged in the exhaust line and a compressor arranged in the intake line;
an exhaust-gas recirculation arrangement including a recirculation line which branches off from the exhaust line downstream of the turbine and opens into the intake line upstream of the compressor; and
a sensor for detecting the concentration Ci,intake of a component i of the charge air in the intake system provided downstream of the opening of the recirculation line into the intake line.
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Accused Products
Abstract
A supercharged internal combustion engine is provided. The engine comprises a cylinder, an intake line in an intake system, for supplying charge air to the cylinder, an exhaust line for discharging exhaust gases, an exhaust-gas turbocharger including a turbine arranged in the exhaust line and a compressor arranged in the intake line, an exhaust-gas recirculation arrangement including a recirculation line which branches off from the exhaust line downstream of the turbine and opens into the intake line upstream of the compressor, and a sensor for detecting the concentration Ci,intake of a component i of the charge air in the intake system provided downstream of the opening of the recirculation line into the intake line. In this way, the exhaust-gas recirculation may be regulated based on feedback from the sensor to control emissions.
22 Citations
20 Claims
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1. A supercharged internal combustion engine, comprising:
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a cylinder; an intake line in an intake system, for supplying charge air to the cylinder; an exhaust line for discharging exhaust gases; an exhaust-gas turbocharger including a turbine arranged in the exhaust line and a compressor arranged in the intake line; an exhaust-gas recirculation arrangement including a recirculation line which branches off from the exhaust line downstream of the turbine and opens into the intake line upstream of the compressor; and a sensor for detecting the concentration Ci,intake of a component i of the charge air in the intake system provided downstream of the opening of the recirculation line into the intake line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for operating a supercharged internal combustion engine, comprising:
adjusting a recirculation rate in an exhaust gas recirculation line via a shut-off element in the recirculation line based on a concentration Ci,intake of a component i in charge air detected by a sensor arranged in an intake system of the engine. - View Dependent Claims (14)
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15. An engine system, comprising:
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a cylinder coupled to an intake system and an exhaust system; a turbocharger including a turbine and a compressor; a high-pressure EGR system that recirculates exhaust upstream of the turbine to the intake system downstream of the compressor; a low-pressure EGR system that recirculates exhaust downstream of the turbine and at least one aftertreatment system to the intake system upstream of the compressor; and an oxygen sensor in the intake system. - View Dependent Claims (16, 17)
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18. A method for operating a supercharged internal combustion engine including both an LP-EGR and HP-EGR system, comprising:
if both the LP-EGR and HP-EGR systems are enabled, adjusting an LP-EGR valve based on an oxygen concentration in charge air detected by an intake system sensor, and adjusting an HP-EGR valve based on estimated HP-EGR flow. - View Dependent Claims (19, 20)
Specification