Method for operating an internal combustion engine with gaseous fuel, as well as computer program product and control unit

By adjusting turbine geometry and exhaust gas turbocharger settings to manage scavenging and exhaust backpressure, the method enhances combustion efficiency and reduces emissions in internal combustion engines using gaseous fuel.

DE102024209128A1Pending Publication Date: 2026-03-26ROBERT BOSCH GMBH
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Patent Information

Application Number
DE102024209128
Authority / Receiving Office
DE · DE
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-09-23
Publication Date
2026-03-26

AI Technical Summary

Technical Problem

Existing internal combustion engines using gaseous fuel face challenges in maintaining scavenging effect during power demands, leading to increased exhaust backpressure, combustion anomalies, and higher nitrogen oxide emissions, especially during transient operations.

Method used

Implementing a method to adjust the turbine geometry and exhaust gas turbocharger settings to maintain scavenging by reducing exhaust backpressure, ensuring fresh air charge and preventing residual gas buildup, thereby enhancing combustion efficiency and reducing emissions.

Benefits of technology

Ensures reliable scavenging even during power increases, reducing knocking tendencies, improving power output, and lowering fuel consumption while minimizing nitrogen oxide emissions.

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Abstract

In a method for operating an internal combustion engine (10) with gaseous fuel, compressed air is supplied to a combustion chamber (14) at least temporarily by means of an exhaust gas turbocharger (24). Furthermore, scavenging is active at least temporarily in this method. It is proposed that when scavenging is active, and depending on the result of an evaluation of a parameter that characterizes a target power increase, a measure is implemented to limit exhaust back pressure.
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