M08 Simulation Paper

8/12/2019 M08 Simulation Paper

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DYNAMIC SIMULATION OF A SINGLE CYLINDER DIESEL

ENGINE

Vidhate Yogesh Deoram

Galande Prashant Arjun

T.E.Mech

S.N.D.COE.YEOLA

Contact:-9623479147,976683369

E-!a"#:[email protected]

[email protected]

Abstract:

he recent drive to reduce emissions and improved e!!iciency means that there is realneed !or improved models !or the simulation o! direct-injection diesel engines. "ith a

vie# to improving the transient !uel control$ a model o! the non-linear transient dynamics

o! a generic direct-injection single cylinder diesel engine is developed in order to predict

the instantaneous engine speed and tor%ue. he model can &e used as an engine simulator

to aid diesel engines control system design and !ault diagnostics. he model does not use

any empirical inputs$ and accurately predicts in-cycle variations o! engine parameter

during transient response. he model treats the cylinder stro'es and the mani!old as

thermodynamic control volume &y using the !illing and emptying method( solving energy

and mass conservation e%uations #ith su& models !or com&ustion$ heat trans!er$

instantaneous !riction and dynamic analysis. )nertia variations and piston pin o!!set are

ta'en into considerations. )n-cycle calculations are per!ormed at each cran' angle$ so the

correct cran' angle o! ignition$ speed variations$ amount o! !uel and the air as #ell as the

!uel-&urning rate are predicted. he model #ould &e implemented in

*A+A,)*/+)01$ and simulation results o! &oth transient and steady state

dynamics #ould &e presented.


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Introduction:

he modeling o! diesel engine has

received much research attention. he

models have &een used !or engine

simulation and design. )n addition$ #iththe recent rapid advance o!

microprocessor technology$ it has

&ecome !easi&le to use these models !or

real time applications$ such as state

estimation$ control and !ault diagnostics.

2o#ever$ there needs to &e !urther

research in modeling techni%ues$ to

improve predictive accuracy$ &e!ore

models can &e used !or estimation and

control tas's.

everal investigators have studied diesel

engine thermodynamic modeling. he

investigations can &e divided !or t#o

categories3

i +inear engine models relying on

empirical data. hese models lin'

steady-state e5perimental data

representing engine thermodynamics and

gas !lo#s$ #ith simple dyanamic models

o! the mechanical components. he

major disadvantage o! such %uasi-linear

models is their heavy reliance on

e5perimental data. 6urthermore$ they

poorly represent o! the transient response

o! the engine.

ii 0on linear engine simulation models

using the 6illing and mptying *ethod$

and the method o! 8haracteristics. hese

thermodynamic engine models have

&een developed !or engine design and

per!ormance predictions$ and !e# have

&een developed !or diesel engine control.he model consists o! several empirical

alge&raic and !irst order di!!erential

e%uations in order to achieve real time

implementation. he main dra#&ac' o!

this type o! model is the re%uirement o!

empirical test data to !it model

e%uations. Diesel engine models !or

electronic control development are

developed. he in-cylinder com&ustion

process is included &y using a single

9one model$ and a !illing emptying

modeling techni%ue. )n several

modi!ications to the model are proposed

to cut do#n computational time and

commercial rate cost. hese models

provide a tool !or engine simulation &ut

is not suita&le !or diagnostic

!ormulations and in-cycle cran'sha!t

angular speed variation predictions.


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Diesel ngine imulation is needed in

order to3

:. 8onduct diesel engine per!ormance

optimi9ation on computer$ reduce

development time and cost in designing

ne# engine or improving engine

per!ormance

;. As a part o! the vehicle simulation

pac'age$ diesel engine model provide

po#er to the vehicle simulation$

investigating the interaction &et#een

engine and vehicle )n this project$ the

simulation is done !or a ingle 8ylinder

and a heavy duty tur&ocharged multi-

cylinder engine.

)nstruments to measure the 'ey

per!ormance parameters

A he tor%ue is measured &y a tor%ue

sensor


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8 2ollo# sha!t encoder


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Si#u!ation

8omputer program are developed to

simulate the engine thermodynamics$

auto ignition and com&ustion. he

program is integrated !or the #hole

engine via.*atla&imulin'$ *atla&imulin';$

*atla&imulin'=$


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Co#'arison

he simulation is done !or di!!erent

engine operating modes. Predicted

results$ ;$ =$ 4$ >$ have per!ect match

#ith the e5perimental data.

8omparison &et#een predicted < ???

and measured < ---- cylinder pressure

under !iring.

8omparison &et#een predicted < ???

and measured < ---- instantaneous

cran'sha!t angular velocity under !iring.


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R$$r$nc$s:

: he *ath#or'$ )nc.$ *A$ /A

*A+A,3$e%e&ence '(")e$ :.

; he *ath#or'$ )nc.$ *A$ /A

)*/+)013A *&o+&a! %o& S"!(#at"n+

Dna!"c Ste!$ :.= #eiri Y.2.$ "hid&orne B.6.$ and

eneviratne +.D. A mathematical

transient model !or the dynamics o! a

single cylinder diesel engine.)n&oc.

S"!(#at"onC$ pages :4>-:>:$ Yor'$

/1$ ep.:.

4 #eiri Y.2.$ "hid&orne B.6.$ and

eneviratne +.D. 8omplete analytical

model o! a single-cylinder diesel engine

!or non-linear control and estimation$

:.

> 2ey#ood B.,./nte&na# co!0(t"on

En+"ne (n)a!enta#. *cGra#-2ill$

0e# Yor'$ ;EE4.

M08 Simulation Paper

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