Интернаука №16 (часть3) 2020 - [27]

tual conditions on the operational reliability of vehi-

 set of rings - 14, 7%;

cles for the carriage of petroleum products between the

 gaskets for the head of the block - 14, 7%;

terminals of the Angren-Pap, length of 145 km, includ-

 gaskets for block head covers - 14, 7%;

ing 76 km of mountain road through the pass Kamchik

b) MAZ 642208-020 trucks

height above the level of the Baltic Sea in 2203 meters [

 sleeves - 1 1 , 3%;

5].

 root insert - 1 0 , 5%;

The climatic conditions of Angren Pap are charac-

 connecting rod bearing - 1 0 , 5%;

terized by:

 gaskets for the covers of the block head -

m Temperature of air :



1 0 , 5%;

absolute minimum - 20.8 0 C ... -25.4 0 C;





exhaust manifold gaskets - 1 0 , 5%.

absolute maximum +33.1 0 С ... + 42.6 0 С;

The results of studies of operational reliability of

The reliability of road trains for specific operating cars in hot climates are included in the report of the conditions will largely depend on the accepted mainte-State Scientific-Technical Programs of Uzbekistan. [11,

nance and repair modes at motor and car service enter-

12].

prises.

The bus fleet №5 p azrabotan rational prevention

The system of technical service (TS) is adjusted to

mode brake authors of VAN LAZ-695 H [1 3], in

suit specific operating conditions.

the bus fleet №3 investigated operational reliability bus-

Essentially e t resource and operational correct-

es PAZ family in usl about ditions hot climate [1 4 ]

ing e .

The above nomenclature of critical reliability parts

The essence of resource adjustment lies in the fact

is of great interest both to the manufacturer when devel-

that the standards for technical maintenance of vehi-

oping measures to increase the reliability of its products,

cles (TMV) are changed relative to the reference using and to the AE, when improving the modes of mainte-correction factors for these conditions.

nance and repair of automobiles. Knowledge of this

When resource correction of the frequency of

nomenclature is also necessary when developing and

maintenance was based on the standards given in the

clarifying the norms for consuming spare parts, com-

"Regulations on maintenance and R of rolling stock"

pleting the working capital of assemblies and parts, or-

[ 6 ],

ganizing the restoration of parts, creating intermediate With operational adjustment, a joint analysis of

warehouses in motor transport enterprises, etc.

the TS-1, TS-2 operations and seasonal mainte-

In mountain conditions, maintenance modes were

nance actually performed at the automobile enterprises

investigated trukcs, «MAN TG A 26400, 19400," main-

(AE) is performed, taking into account the operation

tained in the conditions and s Angren logistics center manual of similar road trains , as well as their labor in-

"[7, 8 ], and the new foreign semi-trailers WIELTON

tensity, design features of road trains, timing data and NS-3 and MERKER M62 in Angren AE for the carriage

expert evaluation of specialists.

of petroleum products through Kamchik pass [ 9.10 ] .

By the operational correction for the MAZ - 642208

Over the years, bus fleets operated buses LAZ,

- 020, Ford-Cargo - 1827 truck tractors, the TS-1 fre-PAZ, LIAZ, as well as the "Ikarus" produc-

quency was determined to be 3,500 km, TS-2 -14,000

tion Hungarian uu in the hot climate of Uzbekistan .

km.

Government of the Republic of Uzbekistan

According to the results of the controlled operating

b ylo accepted solved s purchase modern foreign coach-

parameters are defined reliability are motor MAZ -

es large class of Mercedes-Benz to serve a large popula-

642208 - 020, Ford-Cargo - 1827 (Table. 1 . And 2 ).

tion of the city of Tashkent. Mercedes-Benz buses have

For details and sites, critical for the reliability of been operating in the city of Tashkent since 1995, their

the car or the unit include parts and components that number in a year and the composition of l and 1000

have at least 50% of the failures of the total number of

units.

failures and not less than 70% of value cost of the total

Buses operated by 10 bus depots are daily mainte-

amount of costs that go to address these failures, ie for nance ie at bus depots and maintenance at the subsidiar-spare parts and parts replacement work.

ies' service centers, buses Mercedes-Benz " (in Unitary Enterprise" Toshavtotamirhizmat ").

34

Журнал «Интернаука»

№ 16 (145), часть 3, 2020 г.

Table 1.

Distribution of failures of Ford-Cargo 1827 and MAZ 642208-020 truck tractors by systems and groups on a runof 0 ÷ 150 thousand km

Ford-Cargo 1827

MAZ-642208-020

s

s

s

s

s

s

re

re

r

re

re

r

ilu

ht%

ilu

o

ht%

o

ct

ilu

ilu

ct

№ Name of systems and

f fa

f specie

f fa

f fa

f specie

f fa

groups

tra

tra

o

weig

o

o

o

weig

o

o

er

ic

er

ne

ic

er

ne

if

er

er

if

er

ec

n o

n o

o

ec

o

Numb

Sp

Numb

Numb

Numb

Sp

Numb

Numb

1

ICE

75

6.7

1 0

3

142

8.6

1 6

5.7