https://www.jonyautoparts.com/car-sovutish-fan/
Avtomobil ishlatilayotganda dvigatel haddan tashqari issiqlik hosil qiladi. Dvigatelning haddan tashqari qizib ketganligi sababli to'g'ri ishlamasligi uchun sovutish suyuqligining sirkulyasiyali sovutish tizimi ishlab chiqilgan bo'lib, unda sovutish foniy asosiy rol o'ynaydi. Elektron boshqariladigan sovutish foniy uchun turli modellar tomonidan qo'llaniladigan nazorat qilish usullari boshqacha. Quyida ikkita umumiy elektron fanni boshqarish usullarining ishlash printsipi va muammolarni bartaraf etishni tushunish uchun ikkita nosozlik misollarining kombinatsiyasi keltirilgan.
Example 1 A car with a displacement of V62.4L, the cooling system of the car is "opened" because the electronic fan does not turn, and the electronic fan still cannot run when the air conditioner is turned on. The control of the radiator fan of this Audi car is realized by controlling the ground wire of the fan relay through the dual temperature thermal switch. There are two electronic fans in the cooling fan system of the car. The red wire in their connection harness is the positive wire, the brown wire is the ground wire (directly fixed on the beam), and the red positive wire is a positive wire on the right beam. fixed at the column.
The control of the red positive line is divided into fan low-speed relay, air-conditioning relay and fan high-speed relay control. Pay attention to their specific positions during maintenance. The fan low-speed relay is located in the third relay position in the fuse box on the right side of the engine, and the fan high-speed relay is installed in the No. 217 relay in the auxiliary fuse box under the driver's feet. The low and high speed of the fan The operation is realized by the dual temperature thermal switch on the radiator, which controls the grounding of the relay according to the temperature of the coolant.
Konditsioner kaliti yoqilganda, fanning past tezlikli o'rni sovutish foniyining aylanishini ta'minlash uchun konditsioner fan rölesi tomonidan boshqariladi. 217-sonli o'rni topraklama simi (yashil / sariq sim) er-xotin haroratli termal kalitga ulangan. Sovutish suvi harorati ma'lum bir haroratga ko'tarilgach, ikki haroratli termal kalit o'rni erga boshqaradi va sovutish foniy yuqori-tezkor ish holatiga o'tadi. Bunga qo'shimcha ravishda, kontaktni yoqish tugmasi yoqilganda, 217-sonli o'rni asosiy jonli simi va nazorat jonli simi hammasi buzilganmi?
According to the working principle of the cooling fan system of the car, it is found that the car lacks a fan low-speed relay (the user reported that the car has been repaired in other repair shops). But after it is installed, the cooling fan has only high-speed gear and no low-speed gear. After careful inspection, it was found that the No. 217 relay was burned, causing the cooling fan to always run at a high speed. After the No. 217 relay was replaced, the fault disappeared. Example 2 In a Samsung Jielong car, the water temperature gauge shows normal temperature during driving, but if the engine is stopped and the engine is running at idle speed, although the water temperature gauge shows between 90-100 degree , the cooling system has been "opened" at this time. At this time, it was found that the cooling fan could not operate at all. The control method of the cooling fan of this car is very different from that of the Audi car. This Samsung Jielong car cooling fan is controlled by the car computer. After inspection, the cooling fan relay lacks the control ground wire. When the engine is running at idle speed, the actual temperature of the coolant is measured with a thermometer and has reached 110 degree , but the water temperature gauge of the car still indicates between 90-100 degree . Using a multimeter to measure the resistance of the water temperature sensing plug is about 100 ohms. Therefore, it is initially suspected that the water temperature sensing plug is damaged.
Zaxira qismlar bo'lmasa, qarshilik qiymatini kamaytirish uchun suv haroratini o'lchash vilkasi bilan parallel ravishda 2k ohm toymasin o'zgaruvchan qarshilikni toping. Agar bu vaqtda toymasin o'zgaruvchan qarshilik suv harorati o'lchagich tomonidan ko'rsatilgan harorat sovutish suyuqligining haqiqiy haroratiga mos keladigan tarzda sozlangan bo'lsa, sovutish foniy aslida harorat oshishi bilan normal ishlaydi.
Nosozlik sababi suv harorati sensori vilkasi bo'lgan ko'rinadi. Suv haroratini o'lchash vilkasi shikastlanganligi sababli, u har doim avtomobil kompyuteriga sovutish foniyini ishlatib bo'lmaydigan past harorat xatosi signalini beradi. Tabiiyki, sovutish foniy normal ishlay olmaydi. Nihoyat, suv haroratini o'lchash vilkasini almashtirgandan so'ng, mashina normal holatga qaytdi.
Ko'rinib turibdiki, ushbu avtomobilning kompyuteri suv harorati sensori vilkasining kirish signalini oladi va suv harorati belgilangan qiymatga yetganda, kompyuter sovutish foniyining ishlashi uchun fan o'rni topraklama simini boshqaradi. Yuqoridagi ikkita butunlay boshqa nazorat usullari, ammo biz ularning ishlash printsipini aniqlab olsak va nosozlikni sinchkovlik bilan tekshirish va tahlil qilsak, bu sohadagi muammoni ham tezda hal qilish mumkin.
https://www.jonyautoparts.com/car-sovutish-fan/
