Dynamic Cylinder Deactivation of ICE - Simulation Methodology

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F21%3A00357541" target="_blank" >RIV/68407700:21220/21:00357541 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.4271/2021-01-0682" target="_blank" >https://doi.org/10.4271/2021-01-0682</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4271/2021-01-0682" target="_blank" >10.4271/2021-01-0682</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Dynamic Cylinder Deactivation of ICE - Simulation Methodology

Popis výsledku v původním jazyce

Cylinder deactivation is a well-known approach to reduce the displacement of the ICE during its operation. This helps increase specific load of active cylinders and thus improve ICE efficiency. In serial production, cylinder deactivation is massively utilized in the static form, which keeps a set of cylinders deactivated for the time of the low load operation mode. An advanced cylinder deactivation can be applied in a dynamic form, in which all or a set of cylinders follow a specific deactivation pattern, which consist of a number of firing and deactivated cycles. This consequently forms a new basic repeating unit of the engine, so called supercycle. Such a deactivation strategy allows to dynamically vary the engine displacement in finer steps even for a small number of cylinders. It enables higher displacement reduction, while keeping better NVH, uniform thermal and mechanical stresses in the engine, compared to the conventional deactivation. There have been a few papers that dealt with such deactivation strategy, but none of them has focused in detail on the whole thermodynamics, e.g., gas exchange process and inherent cylinder content during deactivated cycles, gas dynamics in the manifolds and associated variation of volumetric efficiency of firing cycles related to applied cycling patterns. Our work analyzes this phenomenon and proposes the methodology for reliable simulation of the dynamic cylinder deactivation by a 1-D code. This unveils all benefits and also the obstacles that must be coped with not even in the simulation domain, but also in the real engine control. The developed methodology is applied on a model of a spark ignition engine and first results are discussed.

Název v anglickém jazyce

Dynamic Cylinder Deactivation of ICE - Simulation Methodology

Popis výsledku anglicky

Cylinder deactivation is a well-known approach to reduce the displacement of the ICE during its operation. This helps increase specific load of active cylinders and thus improve ICE efficiency. In serial production, cylinder deactivation is massively utilized in the static form, which keeps a set of cylinders deactivated for the time of the low load operation mode. An advanced cylinder deactivation can be applied in a dynamic form, in which all or a set of cylinders follow a specific deactivation pattern, which consist of a number of firing and deactivated cycles. This consequently forms a new basic repeating unit of the engine, so called supercycle. Such a deactivation strategy allows to dynamically vary the engine displacement in finer steps even for a small number of cylinders. It enables higher displacement reduction, while keeping better NVH, uniform thermal and mechanical stresses in the engine, compared to the conventional deactivation. There have been a few papers that dealt with such deactivation strategy, but none of them has focused in detail on the whole thermodynamics, e.g., gas exchange process and inherent cylinder content during deactivated cycles, gas dynamics in the manifolds and associated variation of volumetric efficiency of firing cycles related to applied cycling patterns. Our work analyzes this phenomenon and proposes the methodology for reliable simulation of the dynamic cylinder deactivation by a 1-D code. This unveils all benefits and also the obstacles that must be coped with not even in the simulation domain, but also in the real engine control. The developed methodology is applied on a model of a spark ignition engine and first results are discussed.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

Projekt

<a href="/cs/project/TN01000026" target="_blank" >TN01000026: Národní centrum kompetence Josefa Božka pro pozemní dopravní prostředky</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

SAE Papers

ISSN

0148-7191

e-ISSN

0148-7191

Svazek periodika

2021

Číslo periodika v rámci svazku

2021-01-0682

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

—

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85107011271