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Top 10 analyses to run with Simcenter Amesim engine models and how to choose the most suitable one

Siemens Experimenter Siemens Experimenter
Siemens Experimenter

Thanks to its long history and expertise in the engine modeling area, Simcenter Amesim allows to model an internal combustion engine in many different ways, depending on the goals ... 

We are used to talk about the scalability of Simcenter Amesim, but it goes way beyond this single word and we could say that the only purpose of this capability is to satisfy user’s needs.

Indeed, there are so many needs when it comes to engine modeling, and so many ways to model an engine in Simcenter Amesim, that without guidance, the user could choose an inappropriate submodel with the associated unwanted effects.

Here is a non-exhaustive list of the numerous ways a 4-cylinders engine model can be modeled, which user’s needs it satisfies and some hints about which one to choose based on several relative criterion.

Top 10 analyses to run with Simcenter Amesim engine models and how to choose the most suitable one

#1 - Assessing the thermal behavior of an engine cooling and/or lubrication circuit

The engine is a heat source and can be modeled using the following libraries and components:

  • The Signal, Thermal and thermal hydraulic libraries components

picture_1.1.pngSimple Simcenter Amesim engine model for heat release

  • Or the Cooling system library component

                                       picture_1.pngSimple Simcenter Amesim engine model for heat release and cooling system designpicture_2.pngHeat release Simcenter Amesim map

  • Or the IFP-Drive library components

           picture_3.pngIFP-Drive engine model for heat releasepicture_4.pngIFP-Drive engine model configuration for heat release computation

  • Or the IFP-Engine library components (mean value engine model or high frequency engine model)

picture_5.pngDetailed engine model for heat release in Simcenter Amesim

Capabilities summary

tab1.png

 

#2 - Assessing the fluid flow behavior of an engine cooling and/or lubrication circuit

The engine is a fluid volume with restrictions and can be modeled using the following libraries and components:

  • The Signal, Thermal & Thermal Hydraulic libraries components

picture_6.pngEngine fluid flow Simcenter Amesim model

  • Or the Cooling System library components

picture_7.pngEngine fluid flow simple Simcenter Amesim model

  • Or the CAD import tool combined with Thermal and Thermal Hydraulic libraries components

(view in My Videos)

Capabilities summary

tab2.png

 

#3 - Driving a pump, an alternator, a shaft or a power take-off

The engine is a torque/rotational speed source and can be modeled using the following libraries and components:

  • The Signal and Mechanical libraries components

picture_9.pngSimcenter Amesim torque or speed generation model

  • Or the IFP-Drive library components

pic10-11.png

  • Or the Powertrain library components

picture_12.pngSimcenter Amesim simple engine torque model

  • Or the IFP-Engine library components using a mean value engine model (MVEM)
picture_13.pngLMS Amesim mean value engine model

Capabilities summary

tab3.png

 

#4 - Assessing the fuel consumption of the vehicle over a driving cycle

The engine consumes fuel to drive the vehicle and can be modeled using the following libraries and components

  • The IFP-Drive library components

pic14-15.png

  • Or the IFP-Engine library components using a Mean Value Engine Model (MVEM)

picture_13.pngSimcenter Amesim Mean Value Engine model

  • Or the IFP-Engine library components using a high frequency engine model

picture_17.pngDetailed engine model for fuel consumption simulation in Simcenter Amesim

Capabilities summary

tab4.png

 

#5 - Validating the Engine Control System

The engine, its actuators and sensors are compatible with real-time control units and can be modeled using:

  • IFP-Engine library components with MVEM

picture_18.pngMVEM engine model for control system design and V&V

  • Or with high frequency engine model

picture_19.pngEngine model for control system design and V&V

Capabilities summary

tab5.png

 

#6 - Assessing the crankshaft torsional vibrations induced by the combustion

The engine is a harmonics generator and can be modeled using the following libraries and components:

  • The Powertrain library components

picture_20.pngSimcenter Amesim engine model for NVH analysis

  • Or the IFP-Engine library components

picture_21.pngSimcenter Amesim detailed engine model for NVH analysis

Capabilities summary

tab6.png

 
#7 - Assessing the ride comfort and vehicle drivability

The engine is a 3D dynamic mass with 6 degrees of freedom and can be modeled using:

  • The Powertrain library components

picture_22.pngSimcenter Amesim engine model for ride comfort and drivability analysis

(view in My Videos)

 

 #8 - Assessing the engine bearings lubrication

The engine is a reciprocating force source and can be modeled using the following libraries and components:

  • The Planar Mechanical library components

picture_24.pngEngine model for bearings lubrication design

  • Or the Powertrain library components
picture_25.pngSimcenter Amesim engine model for bearings design

 

Capabilities summary

tab8.png

 

#9 - Assessing the exhaust after-treatment system efficiency

The engine is an exhaust gases generator and can be modeled using the following libraries and components:

  • The Signal library components

picture_26.pngSimple engine exhaust gases Simcenter Amesim model

  • Or the IFP-Drive library components

picture_27.pngSimcenter Amesim engine model for exhaust gases analysis

  • Or the IFP-Engine library components using MVEM

 picture_28.pngSimcenter Amesim MVEM engine model for exhaust gases generation

  • Or the high frequency engine model

picture_29.pngSimcenter Amesim IFP-Engine model for pollutants analysis

Capabilities summary

tab9.png

 

#10 - Assessing the engine air intake, exhaust and fuel systems performances

The engine converts air and fuel into exhaust gases, torque and heat and can be modeled using the following libraries and components:

  • The IFP-Engine library components with MVEM

 picture_30.pngSimcenter Amesim MVEM engine model for air and fuel loops design

  • Or the CFD 1D and IFP-Engine libraries components

picture_31.pngSimcenter Amesim detailed engine model for air and fuel loops design

Capabilities summary

tab10.png

 

Bonus (coming in rev 16) - Assessing the vehicle underhood thermal behavior

The engine is a radiative and convective heat source and will be modeled using the HEAT library components: 

picture_32.pngSimcenter Amesim engine model for underhood thermal analysispicture_33.pngSimcenter Amesim HEAT underhood cooling stack analysis

  

 For more information please visit our website

Comments
Experimenter
Experimenter

Hello Roman,

 

Thanks for putting together this overview of the top 10 engine modeling scenarios.  Do you happen to have actual models for these that you can share?  I'd like to use these examples as a learnig tool/mechanism.  I'm sure others will find it beneficial.

Thanks!!

Siemens Experimenter Siemens Experimenter
Siemens Experimenter

Hi Allegheny,

 

 

image.pngLMS Amesim demo helpMany models covering all these scenarios are available in the LMS Amesim Demo Help (Except for the bonus scenario that will arrive in rev16).

 

In addition to the actual models, you always find the explanation of scenarios and what are the capabilities of the model!

 

Let us know if you miss some scenarios, we are always keen to furnish this demo base.

 

 

Romain

Siemens Enthusiast Siemens Enthusiast
Siemens Enthusiast

nice example of scalability and multiphysics modeling within LMS Amesim!

Experimenter
Experimenter

Hi,

I understand that using the MVEM engine model, one will need to provide some engine data. Is there a format for this and how many points will be required? I am trying to model a diesel engine from published technical data, probably some engine data will be available for 25%, 50%, 75% 100% load only.

Rgds,

ngcw

Siemens Experimenter Siemens Experimenter
Siemens Experimenter

 

 
Is there a format for this and how many points will be required? I am trying to model a diesel engine from published technical data, probably some engine data will be available for 25%, 50%, 75% 100% load only.

Hi, yes indeed. Depending on your engine complexity (EGR, VVT, multi-injection..), it can go from 100 points (4 loads, 5 rpm, ...) to up to 300 points, see below.

Regarding the format, please have a look at the MVEM tool, everything is explained there (maps format, units, ...)

 

Engine models scalability.png

 

I hope this helps.

 

Best regards