Bu yerda
-tirsakli valini, dvigatelni nominal ish rejimidagi burchak tezligi,
rad/c;
-tirsakli valini, dvigatelni maksimal burovchi momenti (M
max
) bilan ishlayotgan
paytga to„g„ri keladigan burchak tezligi, rad/c.
Yonilg„i aralashmasi silindrdan tashqarida tayyorlanadigan
(karbyurator,injektorli)
dvigatellarda, dizellardagiga qaraganda kattaroq bo„ladi.
=1,5…2,5karbyuratorli dvigatellar uchun,
=1,2…1,6dizel dvigatellar uchun.
Avtotranspor tvositasini aylanish chastotasi bo„yicha moslashuvchanlik
koeffitsenti
uning tezlanishi (razgon) uchun katta ahamiyatga ega.
Avtotransport vositasi joyidan siljiyotgan paytda yuklanish oshishi natijasida
dvigatel tirsakli valini aylanish chastotasi kamayadi, bu uning massasiga
teskari
proporsional xolda sodir bo„ladi.
Agarda
qiymati
nisbatdan kichik bo„lsa dvigatel o„chib qoladi.
buyerda:
-dvigatel tirsakli valini aylanishini salt
yurishdagi eng
kichik(minimal)
burchak tezligini qiymati,
-dvigatel tirsakli valini aylanishini tezlanish (razgon) so„ngidagi burchak
tezligini qiymati.
Dvigatel quvvatini uning tirsakli vali aylanish chastotasining turli (barcha)
intervallarida uchinchi darajali uchxaddan iborat emperik (S.R.Leyderman tavsiya
etgan) formula yordamida hisoblanadi:
[ (
) (
)
(
)
],kVt (1.8)
[(
) (
)
(
)
]=12.426 kVt
[(
) (
)
(
)
]=26.448 kVt
[(
) (
)
(
)
]=41.382 kVt
[(
) (
)
(
)
]=56.544 kVt
[(
) (
)
(
)
]=71.25 kVt
[(
) (
)
(
)
]=84.816 kVt
[(
) (
)
(
)
]=96.558 kVt
[(
) (
)
(
)
]=105.792 kVt
[(
) (
)
(
)
]=111.834 kVt
[(
) (
)
(
)
]=114 kVt
O’zg.
Varoq
Hujjat№.
Imzo
Sana
Varoq
10
bu yerdaN
e
=N
nom
-dvigatel tirsakli vali nominal aylanish chastotasidagi uning
quvvati (protatip texnik tavsifi asosida tanlanadi.), kVt;
a,b,c-empirik koeffitsentlar.
Aylanish chastotasi chegaralanadigan dvigatelli avtotransport vositalari uchun
)
)
(1.9)
)
)
(1.10)
)
)
(1.11)
Bunda quyidagi shart bajarilishi kerak
+ + =1(1.12)
Burovchi moment dvigatelni har xil aylanish chastota (n
x
) lari oraliqlari
quyidagi formula bilan aniqlanadi:
,
N
