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

by Siemens Visionary Siemens Visionary on ‎05-04-2017 04:46 AM - edited

Thanks to its long history and expertise in the engine modeling area, LMS Imagine.Lab 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 LMS 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 LMS 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 LMS 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

Simple LMS Amesim engine model for heat releaseSimple LMS Amesim engine model for heat release

  • Or the Cooling system library component

                                       Simple LMS Amesim engine model for heat release and cooling system designSimple LMS Amesim engine model for heat release and cooling system designHeat release LMS Amesim mapHeat release LMS Amesim map

  • Or the IFP-Drive library components

           IFP-Drive engine model for heat releaseIFP-Drive engine model for heat releaseIFP-Drive engine model configuration for heat release computationIFP-Drive engine model configuration for heat release computation

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

Detailed engine model for heat release in LMS AmesimDetailed engine model for heat release in LMS 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

Engine fluid flow LMS Amesim modelEngine fluid flow LMS Amesim model

  • Or the Cooling System library components

Engine fluid flow simple LMS Amesim modelEngine fluid flow simple LMS Amesim model

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

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

LMS Amesim torque or speed generation modelLMS Amesim torque or speed generation model

  • Or the IFP-Drive library components

pic10-11.png

  • Or the Powertrain library components

LMS Amesim simple engine torque modelLMS Amesim simple engine torque model

  • Or the IFP-Engine library components using a mean value engine model (MVEM)
LMS Amesim mean value engine modelLMS 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)

LMS Amesim Mean Value Engine modelLMS Amesim Mean Value Engine model

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

Detailed engine model for fuel consumption simulation in LMS AmesimDetailed engine model for fuel consumption simulation in LMS 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

MVEM engine model for control system design and V&VMVEM engine model for control system design and V&V

  • Or with high frequency engine model

Engine model for control system design and V&VEngine 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

LMS Amesim engine model for NVH analysisLMS Amesim engine model for NVH analysis

  • Or the IFP-Engine library components

LMS Amesim detailed engine model for NVH analysisLMS 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

LMS Amesim engine model for ride comfort and drivability analysisLMS Amesim engine model for ride comfort and drivability analysis

 

 #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

Engine model for bearings lubrication designEngine model for bearings lubrication design

  • Or the Powertrain library components
LMS Amesim engine model for bearings designLMS 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

Simple engine exhaust gases LMS Amesim modelSimple engine exhaust gases LMS Amesim model

  • Or the IFP-Drive library components

LMS Amesim engine model for exhaust gases analysisLMS Amesim engine model for exhaust gases analysis

  • Or the IFP-Engine library components using MVEM

 LMS Amesim MVEM engine model for exhaust gases generationLMS Amesim MVEM engine model for exhaust gases generation

  • Or the high frequency engine model

LMS Amesim IFP-Engine model for pollutants analysisLMS 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

 LMS Amesim MVEM engine model for air and fuel loops designLMS Amesim MVEM engine model for air and fuel loops design

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

LMS Amesim detailed engine model for air and fuel loops designLMS 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: 

LMS Amesim engine model for underhood thermal analysisLMS Amesim engine model for underhood thermal analysisLMS Amesim HEAT underhood cooling stack analysisLMS Amesim HEAT underhood cooling stack analysis

  

  

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Comments
by Experimenter
on ‎06-09-2017 01:32 PM

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!!

by Siemens Visionary Siemens Visionary
on ‎06-12-2017 09:56 AM

Hi Allegheny,

 

 

LMS Amesim demo helpLMS 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