«применение современных информационно коммуникационных технологий в проведении реформ в новом узбекистане»


«Yangi O‘zbekistonda islohotlarni amalga oshirishda zamonaviy axborot-kommunikatsiya



Download 17,65 Mb.
Pdf ko'rish
bet561/709
Sana18.02.2022
Hajmi17,65 Mb.
#455307
1   ...   557   558   559   560   561   562   563   564   ...   709
Bog'liq
To`plam elektron 1-2shobalar

«Yangi O‘zbekistonda islohotlarni amalga oshirishda zamonaviy axborot-kommunikatsiya 
texnologiyalaridan foydalanish» mavzusida Xalqaro ilmiy-amaliy konferentsiya 
Andijon 
 
27-29 oktabr 2021 yil 
583 
Адабиётлар: 
1. https://ru.wikipedia.org/wiki/Cтандарт. 
2. http://lcweb.loc.gov/z3950/agency). 
3. 
http://www.internic.net/
 
ADVANCED AUTOMOTIVE COOLING SYSTEM TO IMPROVE FUEL 
EFFICIENCY 
Salomov U.R. Rector of Fergana Polytechnic Institute 
Moydinov D.A. AndMBI 1
st
 course Doctoral Student 
Zokirjonov A.Z. AndMBI 1
st
 course Master Student 
Andijan Machine-Building Institute, Uzbekistan 
Advanced automotive engine cooling systems can positively impact the 
performance, fuel economy, and reliability of internal combustion engines. A smart 
engine cooling system typically features multiple real time computer controlled 
actuators: a three-way linear smart valve, a variable speed coolant pump, and electric 
radiator fan(s). In this dissertation, several innovative comprehensive nonlinear 
control and optimization operation strategies for the next generation smart cooling 
application will be analyzed. An advanced engine cooling system introduces the 
concept of “thermal management” on regulating the engine coolant in a precise 
desired working temperature with minimum power consumption. A smart cooling 
system updates the mechanical pump and radiator fan(s) with electrical controlled 
components and replaces the wax-based valve with a 3-way computer controlled 
smart valve. The cooling system for internal combustion engines removes waste heat 
to ensure a normal in-cylinder combustion process. To accomplish this task, the 
thermostat valve, radiator, radiator fan(s), and water pump circulate cooling fluid 
through the engine block and reject heat to the local environment. Since the cooling 
system consumes a portion of the engine's power, it is important that its operation 
use minimal input energy. In this chapter, a multiple radiator fan matrix was 
controlled to minimize energy usage for subsequent efficiency gains. A 
mathematical model for the radiator fan(s) and the forced convection heat transfer 
process was developed to establish a mixed integer nonlinear programming problem. 
An interior points approach was introduced to solve the minimization problem. A 
series of laboratory tests have been conducted with different fan and speed 
combinations, with the objective to cool a thermal loaded engine. The cooling 
system in gasoline and diesel engines serves an important role in maintaining the 
desired coolant temperature for enhanced performance. If the engine operates too 
hot, then abnormal in-cylinder combustion may occur leading to degraded fuel 
economy and tailpipe emissions. Approximately 25% of the total petroleum energy 
converted during the spark ignition engine combustion process is lost to the cooling 
system. As a result, the cooling system must accommodate a significant amount of 
heat while working under ambient operating conditions. The cooling system also 



Download 17,65 Mb.

Do'stlaringiz bilan baham:
1   ...   557   558   559   560   561   562   563   564   ...   709




Ma'lumotlar bazasi mualliflik huquqi bilan himoyalangan ©hozir.org 2024
ma'muriyatiga murojaat qiling

kiriting | ro'yxatdan o'tish
    Bosh sahifa
юртда тантана
Боғда битган
Бугун юртда
Эшитганлар жилманглар
Эшитмадим деманглар
битган бодомлар
Yangiariq tumani
qitish marakazi
Raqamli texnologiyalar
ilishida muhokamadan
tasdiqqa tavsiya
tavsiya etilgan
iqtisodiyot kafedrasi
steiermarkischen landesregierung
asarlaringizni yuboring
o'zingizning asarlaringizni
Iltimos faqat
faqat o'zingizning
steierm rkischen
landesregierung fachabteilung
rkischen landesregierung
hamshira loyihasi
loyihasi mavsum
faolyatining oqibatlari
asosiy adabiyotlar
fakulteti ahborot
ahborot havfsizligi
havfsizligi kafedrasi
fanidan bo’yicha
fakulteti iqtisodiyot
boshqaruv fakulteti
chiqarishda boshqaruv
ishlab chiqarishda
iqtisodiyot fakultet
multiservis tarmoqlari
fanidan asosiy
Uzbek fanidan
mavzulari potok
asosidagi multiservis
'aliyyil a'ziym
billahil 'aliyyil
illaa billahil
quvvata illaa
falah' deganida
Kompyuter savodxonligi
bo’yicha mustaqil
'alal falah'
Hayya 'alal
'alas soloh
Hayya 'alas
mavsum boyicha


yuklab olish