Uu nhuoc diem cua cac he dan dong 4 banh

Tags: vi sai trung tam, dieu kien su dung, he dan dong, ban thoi gian, do bam duong, phu thuoc vao, che do, tai xe, co the, nhuoc diem, hoan toan, cua cac, banh, 4, xe


Voi nhung kieu nhu 4 banh toan thoi gian hay ban thoi gian, viec lua chon hoan toan phu thuoc vao phong cach lai va dieu kien su dung boi chung co uu, nhuoc diem rieng.

Dong co sinh ra cong suat va mo-men xoan. De truyen nang luong toi cac banh khien chung quay, chiec xe cua ban can phai co co cau dan dong. Tuy nhien, khong phai tat ca cac banh deu truc tiep nhan cong suat va mo-men xoan tu dong co. Tuy thuoc yeu cau ky thuat giua cac loai xe va tai tung thoi diem ma nguoi ta co nhung phuong phap truyen dong khac nhau nhu mot cau (cho 2 banh) va 2 cau (cho 4 banh).

Duoi day la uu nhuoc diem cua cac loai dan dong 4 banh.

Dan dong 4 banh ban thoi gian (Part-time 4WD)

Day he dan dong pho bien nhat tren cac mau xe dia hinh. No hoat dong sau khi tai xe nhan nut hoac chuyen che do tu ca-bin. Luc do, mo-men xoan duoc truyen toi ca 4 banh. Con khi chua duoc kich hoat, nang luong tu dong co duoc truyen toi hai banh truoc hoac sau.

He dan dong 4 banh tren xe Hummer.
He dan dong 4 banh tren xe Hummer.

Khi tai xe chuyen che do tu 2 banh sang 4 banh tren hop so phu, truc truoc va truc sau khoa lai voi nhau, dan den cac banh truoc va banh sau quay voi cung mot toc do, giup cai thien do bam duong trong dieu kien xe di thang.

Truoc khi co vi sai trung tam, he dan dong nay gan nhu khong co cach nao de cac banh quay voi van toc khac nhau, tai nhung khuc cua. Vi vay, rat it khi tai xe kich hoat che do 2 cau tru khi xe di chuyen tren nhung mat duong tron truot (nhu tren tuyet) hoac sa lay.

Neu co gang lai mot chiec xe tren duong kho, khi che do 4 banh duoc kich hoat, ban se cam thay kho khan va banh cung lai khi chuyen huong. Ngoai ra, dieu nay co the lam hong cac thiet bi trong bo truyen dong va khien lop mon nhanh hon.

He dan dong 4 banh ban thoi gian co nhung diem dang luu y can thiet cho nhung ai dang su dung. Dac diem dau tien la o che do binh thuong, xe dan dong thong qua mot cau (2WD), thong thuong la cau sau.

Viec cai cau hoac cat cau hoan toan do tai xe. Khi chuyen sang che do 4WD, nang luong tu dong co duoc truyen cho ca 4 banh. Trong dieu kien can thiet, lai xe co the chon che do 2 cau so cham de cai thien mo-men xoan. He dan dong 4 ban ban thoi gian khong bao gom vi sai trung tam va duoc khuyen cao la khong su dung tren mat duong kho hay qua cung.

Uu nhuoc diem cua cac he dan dong 4 banh
Jeep la mot trong nhung mau xe dac trung su dung kieu 4WD ban thoi gian.

Uu diem cua he dan dong 4 banh ban thoi gian la don gian nen so voi cac he dan dong 4 banh khac, gia thanh thap va khong qua phuc tap. Dieu nay giai thich vi sao no lai xuat tren nhung mau xe re tien va o cap thap. Mot loi the nua la no khong lam ton xang so voi kieu dan dong 4 banh toan thoi gian.

Cac mau trang bi dan dong 4 banh ban thoi gian thuong co yeu cau khat khe la tai xe phai dung truoc khi chuyen tu che do 2 banh sang 4 banh. No khien nguoi lai phai chiu trach nhiem hoan toan vao quyet dinh cai cau cua minh, tuy thuoc vao dia hinh va thoi tiet. Cung nhu vay, chuyen cat cau cung quan trong khong he kem.

Dan dong 4 banh thuong xuyen (Permanent 4WD)

Khac voi bo 4WD ban thoi gian, kieu dan dong nay thuoc loai toan thoi gian, nghia la khong co che do mot cau chu dong. Nang luong tu dong co luon luon duoc truyen toi 4 banh. Tai xe duoc huong nhung loi the cua he 4WD trong moi dieu kien ve dia hinh ma khong can lua chon che do mot cau hay hai cau.

O kieu nay, he dan dong co vi sai trung tam nen xe hoan toan co the di chuyen tren mat duong kho ma khong so hong cac thiet bi hoac banh bi cung khi vao cua. Tren mot vai mau, vi sai trung tam co the bi khoa khi can do bam duong, nhu khi vuot dia hinh.

Ve mat ky thuat, vi sai trung tam la bo truyen banh rang hanh tinh, co nhiem vu dam bao cho cac banh xe hai ben quay voi toc do khac nhau khi vao cua, hoac tren duong khong bang phang.

Uu diem cua dan dong 4 banh thuong xuyen la khong bat tai xe phai lua chon, vi vay, ho co the tap trung cho viec dieu khien xe.

O dieu kien lam viec binh thuong, 95% mo-men xoan cua Porsche Carrera duoc dua xuong banh sau.
O dieu kien lam viec binh thuong, 95% mo-men xoan cua Porsche Carrera duoc dua xuong banh sau.

Tuy nhien, van de cua he dan dong nay la no an kha nhieu xang so voi cac kieu khac. Trong mot vai truong hop, khi vi sai trung tam bi khoa co the khien viec cam lai vat va, do xe co xu huong di chuyen thang ve phia truoc hon la chuyen huong.

Ngoai ra, do can nhieu thiet bi nen gia thanh co the cao hon loai dan dong 4 banh ban thoi gian. Hien nay, van co nhung nha san xuat trung thanh voi kieu 4WD thuong xuyen nhu Land Rover.

Dan dong toan thoi gian (full-time 4WD)

He dan dong 4 banh toan thoi gian (full-time 4WD) tu dong phan bo mo-men xoan toi cac truc khi can do bam duong. Tai xe co the cai dat che do "Auto 4WD" de xe tu quyet dinh khi nao kich hoat hoac ngung kich hoat che do 4 banh.

Uu diem lon nhat cua he thong nay la xe se tu quyet dinh viec phan bo mo-men xoan toi truc nao nen tai xe co the tap trung lai. Tuy nhien, diem yeu la trong nhung truong hop dia hinh rat hiem tro, no can tro kha nang cua tai xe.

Chang han nhu do phan ung nhanh va hoan toan tu dong nen tai xe gan nhu khong the tu chu khi vuot chuong ngai vat. Trong khi do, voi kieu ban thoi gian thi ho co the gai cau cham hoac nhanh tuy theo tinh hinh.

Hon nua, kieu dan dong nay kha phuc tap, nhieu thiet bi nen dat hon.

Dan dong tat ca cac banh (All-wheel drive)

Kieu AWD giong nhu dang dan dong 4 banh thuong xuyen, tuc la nang luong duoc truyen lien tuc toi cac banh. Khong co cach nao de tat chuc nang nay. Mot dac diem nua la AWD khong can hop so phu.

AWD co xu huong tich hop thanh mot goi voi trong luong nho hon so voi cac kieu truyen thong. Nguyen ly van hanh cua no la phan bo mo-men xoan toi cac cau tuy theo dia hinh. Chang han nhu chiec Porsche 911 Carrera o dieu kien binh thuong co 5% mo-men duoc dua toi cau truoc va 95% con lai xuong cau sau. O nhung tinh huong can mo-men toi cau truoc, he thong se phan bo lai sao cho do bam duong o muc tot nhat.

AWD co muc tieu hao nhien lieu kha tot so voi cac kieu dan dong khac. Dong thoi, do nho gon nen cac ky su khong can phai dua gam xe len cao. Cuoi cung la do may tinh tu dam nhiem nen tai xe co the yen tam lai o moi dia hinh.

Tuy nhien voi gioi me kham pha, kieu AWD khong may thu vi vi no khong co hop so phu. Vi vay, ho khong the tu chu trong viec dieu khien xe ma phai pho mac hoan toan cho may tinh.

Nguyen Nghia (theo MSN)
Anh: MSN

Theo dong su kien:
Khu mui hoi tren oto (24/04)
Bat benh cua phanh (18/04)
Cach rua xe chuyen nghiep (12/04)
Uu nhuoc diem cua cac he dan dong (17/10/2006)
Nhung yeu cau an toan khi sua xe (12/09/2006)
Bao duong dau hop so tu dong (05/09/2006)
Bao duong lop xe (29/08/2006)
Xem tiep»
Viet Bao
Tìm hiểu: vi sai trung tam, dieu kien su dung, he dan dong, ban thoi gian, do bam duong, phu thuoc vao, che do, tai xe, co the, nhuoc diem, hoan toan, cua cac, banh, 4, xe

Xem Bản Tiếng Việt Có Dấu: Ưu nhược điểm của các hệ dẫn động 4 bánh

Ban co the doc ban tieng Viet co dau cua bai viet Ưu nhược điểm của các hệ dẫn động 4 bánh bang cach nhan chuot vao duong dan tren.

Lien he ve tin Uu nhuoc diem cua cac he dan dong 4 banh

Nhan xet, hay lien he ve tin Uu nhuoc diem cua cac he dan dong 4 banh co the gui bang duong dan o duoi. Ban nen gui kem tieu de bai viet Uu nhuoc diem cua cac he dan dong 4 banh de lam tham khao. Bai viet nay thuoc chuyen de Tong hop trong chuyen muc O to xe may.

Cac tin khac:

Xem tiep ... Tong hop
Kenh Tin RSS Kenh Tin RSS | Du Bao Thoi Tiet | Lich Xem TV | Lien He - Contact | Quang Cao | Viec Lam | Dieu Kien Su Dung | Bao Ve Tinh Rieng Tu | Sitemap

Copyright©2008 VietBao.vn, Thu Vien Thong Tin Tong Hop Viet Nam va The Gioi, phien ban thu nghiem phan mem Viet Bao Viet Nam, beta 1.0