General Electric Company

Ai Alpine US Bidco Inc.

Transportation IP Holdings, LLC

Ge Global Sourcing LLC

Innio Jenbacher Gmbh & Co Og

Prashant Srinivasan

Dipankar Deb

Maruthi Narasinga Rao Devarakonda

Sharath Sridhar Aramanekoppa

Medy Satria

William Collins Vining

Jassin Marcel Fritz

Sachin Shivajirao Kulkarni

Sebastian Walter Freund

Johannes Huber

Shashi Kiran

James Henry Yager

Manthram Sivasubramaniam

Prem Kumar Patchaikani

Georgios Bikas

Oscar Eduardo Sarmiento Penuela

Daniel George Norton

Pradheepram Ottikkutti

Chandan Kumar

Rosa Castane Selga

Mark James Lemke

Maruthi NarasingaRao Devarakonda

Pin Zeng

Hang Lu

Dhruval Bhatt

Edward Owen Reinbold

Karthikk R

Raphael Rupert Burgmair

Rwitam Mitra

Sarmiento Penuela Oscar Eduardo Eduardo

An internal combustion engine is provided having at least one turbocharger having a compressor and an exhaust gas turbine, at least two actuating members for controlling a boost pressure by the compressor, a measuring device for measuring at least one measurement signal, and a control device adapted to actuate the actuating members by varying a degree of opening of the actuating members. The control device of the internal combustion engine is configured to calculate a total degree of opening of the actuating members necessary to achieve a desired boost pressure provided by the compressor. This is in dependence on the at least one measurement signal. The control device is also configured to determine the total degree of opening split between each of the at least two actuating members, and to control each of the actuating members according to its individual degree of opening to reach the desired boost pressure.

Boost pressure control

A method for diagnosing a waste gate valve malfunction in a power generation system is presented. The method includes determining an actual pressure differential across a throttle valve. The method further includes determining an estimated pressure differential across the throttle valve based on one or more first operating parameters of the power generation system. Furthermore, the method includes determining an absolute difference between the actual pressure differential and the estimated pressure differential. Moreover, the method also includes comparing the absolute difference with a threshold value and if the absolute difference is greater than the threshold value, determining an operating condition of the throttle valve. Additionally, the method includes determining whether the waste gate valve has malfunctioned based on the determined operating condition of the throttle valve. An engine controller and a power generation system employing the method are also presented.

Method and engine controller for diagnosing waste gate valve malfunction and related power generation system

Systems and methods are provided for controlling exhaust gas recirculation (EGR). In one example, an engine system includes a first EGR valve coupling an exhaust manifold to an engine exhaust system, a second EGR valve coupling the exhaust manifold to an engine intake system, and a control unit. The control unit selectively adjusts a position of the first EGR valve based on a target amount, and adjusts a position of the second EGR valve based on the target amount and a position of the first EGR valve. Responsive to a first degradation condition of the first EGR valve, the control unit adjusts the position of the second EGR valve based on the target amount and based on a pressure of the first exhaust manifold, and responsive to a second degradation condition of the first EGR valve, adjusts the position of the second EGR valve based on the target amount.

Method and systems for exhaust gas control

A method for controlling an emission amount in an exhaust gas stream emitted from a power generation system is presented. The method includes determining a pre-catalyst emission level using a combustion engine model. The method further includes determining a post-catalyst emission level using a three-way catalyst model based on the pre-catalyst emission level. Furthermore, the method includes determining an adjusted post-catalyst emission level based on the post-catalyst emission level. Moreover, the method includes determining a difference between the post-catalyst emission level and the adjusted post-catalyst emission level and comparing the difference with a threshold value. Additionally, the method includes determining whether to adjust an actual value of an engine operating parameter based on the comparison such that the emission amount in the exhaust gas stream is maintained below an emission regulatory limit. An engine controller and a power generation system employing the method are also presented.

Engine controller and methods for controlling emission and power generation system using the same

A system includes an exhaust treatment system configured to treat emissions from a combustion engine via a catalyst. The system includes a controller configured to obtain an operating parameter indicating catalyst performance. The controller is configured to determine a deterioration factor indicating deterioration of the catalyst based at least in part on the operating parameter. The controller is configured to determine an adaptation term configured to modify a reductant injection command for the combustion engine to account for the deterioration factor of the catalyst. The controller is configured to generate a signal indicating the adaptation term.

Methods to adapt reductant injection controls for catalyst aging

A system includes an exhaust treatment system configured to treat emissions from a combustion engine via a catalyst. The system includes a controller configured to obtain an operating parameter indicating catalyst performance. The controller is configured to determine a deterioration factor indicating deterioration of the catalyst based at least in part on the operating parameter. The controller is configured to determine an adaptation term configured to modify an air-fuel ratio command for the combustion engine to account for the deterioration.

Methods to adapt air-fuel (A/F) controls for catalyst aging

A system includes an engine comprising an EGR valve that recirculates a portion of exhaust gas, a data repository that stores a first look up and one or more engine operational parameters, an engine control unit operationally coupled to the engine and the data repository, wherein the engine control unit is configured to: determine a desired EGR flow rate reference of the portion of the exhaust gas based on the one or more engine operational parameters and the first look up table, determine a current estimated EGR flow rate based on the one or more engine operational parameters, determine a designated corrected EGR flow rate reference based on the desired EGR flow rate reference and a delta EGR flow rate, determine EGR flow rate error, and determine a percentage opening of the EGR valve based at least on the EGR flow rate error.

Methods and systems to control exhaust gas recirculation

Various methods and systems are provided for individually adjusting fueling to cylinders of an engine based on an output of a knock sensor coupled to each cylinder. In one embodiment, a method for a multi fuel engine comprises individually adjusting, for each cylinder of the engine, one or more of a gas flow rate of gaseous fuel, a diesel flow rate of diesel fuel, an injection or induction timing of gaseous fuel, or an injection timing of diesel fuel based on each of an output of an individual knock sensor for each cylinder, a knock threshold for current engine operating conditions, and a reference value of individual cylinder output.

Method and systems for adjusting engine cylinder operation based on a knock sensor output

In one embodiment, a method includes receiving, via a first sensor, a signal representative of at least one of a manifold pressure, a manifold temperature, or a manifold mass flow rate of a manifold. The method further includes deriving, via a manifold model and the first sensor signal, a gas concentration measurement at a first manifold section of the manifold. The method additionally includes applying the gas concentration measurement during operations of an engine, wherein the manifold is fluidly coupled to the engine.

Lambda virtual sensor systems and methods for a combustion engine

A system includes a controller that has a processor. The processor is configured to receive a first signal from a first sensor indicative of a first exhaust measurement, wherein the first sensor is disposed at a catalytic converter system inlet of a catalytic converter system. The processor is further configured to derive one or more of an estimated length, estimated volume, or estimated transport delay of an exhaust conduit based on the first signal, wherein a first end of the exhaust conduit is connected to an engine outlet of a engine, and a second end of the exhaust conduit is connected to the catalytic converter system inlet; and to apply the one or more of estimated length, estimated volume, or estimated transport delay of the exhaust conduit during control of the engine.

Systems and methods for using transport time to estimate engine aftertreatment system characteristics

A system includes a controller that has a processor configured to receive a first signal from a first oxygen sensor indicative of a first oxygen measurement, wherein the first oxygen sensor is disposed upstream of a catalytic converter system; and to receive a second signal from a second oxygen sensor indicative of a second oxygen measurement, wherein the second oxygen sensor is disposed downstream of the catalytic converter system; and to execute a catalyst estimator system, wherein the catalyst estimator system is configured to derive an oxygen storage estimate based on the first signal, the second signal, and a catalytic converter model. The processor is configured to derive a system oxygen storage setpoint for the catalytic converter system based on the catalytic converter model and the oxygen storage estimate.

Systems and methods for model based control of catalytic converter systems

A gas engine assembly includes a compressor, a combustion system, a bypass line and a control system. The control system is configured to control gas supply parameters based on a transportation delay value. The transportation delay value corresponds to a delay between a time when a gas supply control mechanism is adjusted and a time that gas having a corresponding adjustment of a gas characteristic is received at a predetermined point downstream from the gas supply control mechanism.

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Bengaluru, India

Prashant Srinivasan