Một số cách chỉnh xupap xe máy đơn giản

Cách chỉnh xupap xe máy
Một số cách chỉnh xupap xe máy đơn giản
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Đối với xe máy, xupap là một trong những chi tiết vô cùng quan trọng, chúng đảm nhiệm vai trò đóng mở các cửa nạp, cửa xả của động cơ và để thực hiện quá trình thay đổi khí.

Cũng như các bộ phận khác, khi hoạt động trong một thời gian, thiết bị này sẽ xuất hiện nhiều hiện tượng hư hỏng. Vậy làm cách nào để xử lý các vấn đề này của xupap? Bài viết dưới đây chúng ta sẽ cùng tìm hiểu về cách chỉnh xupap xe máy đơn giản tại nhà.

Một số điều cần biết về xupap

Cấu tạo của xupap

Trong động cơ, mỗi xi lanh đều có một xupap nạp và một xupap xả. Cấu tạo chung của xupap được chia làm 3 phần: phần nấm, thânphần đuôi.

Đặc điểm về vật liệu chế tạo

Vì điều kiện làm việc của xupap khá phức tạp, nên yêu cầu vật liệu chế tạo nên xupap cần phải bền, dẻo và chịu được nhiệt độ cao. Do đó, vật liệu được sử dụng để làm xupap thường làm bằng thép crôm hoặc thép ni ken, có gia công nhiệt luyện.

Điều kiện làm việc và nguyên nhân dẫn đến hư hỏng của xupap

Do tiếp xúc trực tiếp với khí cháy, nên các xupap chịu áp lực rất lớn và nhiệt độ cao, nhất là đối với xupap xả. Khi xupap đóng, đầu của xupap sẽ va đập mạnh với đế nên nấm dễ bị biến dạng, cong vênh. Ngoài ra, còn do điều kiện bôi trơn xu páp khó khăn, hay do tốc độ lưu động của dòng khí qua xu páp rất lớn nên xu páp còn bị ăn mòn cơ học.

Xupap xe máy
Xupap xe máy

Khi nào cần căn chỉnh xupap xe máy?

Khi xupap bị hở sẽ xuất hiện các hiện tượng sau:

– Có tiếng kêu lách cách ở phía đầu động cơ

– Xe khó nổ, động cơ bị mất sức ép, yếu hơn bình thường

– Thường thì sau 4.000-10.000 km, bạn nên kiểm tra và chỉnh lại xupap một lần.

Khi xe của bạn gặp phải những biểu hiện này, thì bạn cần phải kiểm tra, căn chỉnh lại xupap để đảm bảo cho máy hoạt động tốt nhất.

Nếu khe hở trên xupap quá bé, động cơ sẽ mất sức ép lúc nóng. Lúc này, xupap nở dài về phía buồng nổ làm cho lợi và bệ xupap không còn đóng kín nữa.

Ngược lại, nếu khe hở xupap lớn hơn quy định, thì động cơ sẽ kêu to khi vận hành, đầu cò và đuôi xupap nhanh hỏng do va đập, động cơ khó nổ vì sai lệch điểm mở của các xupap.

Hướng dẫn căn chỉnh khe hở xupap ở xe máy.

Khi chỉnh xupap bạn nên để động cơ nguội rồi căn chỉnh sẽ tốt hơn. Để chỉnh khe hở xupap chúng ta thực hiện như sau:

Cách chỉnh xupap xe máy
Cách chỉnh xupap xe máy

Cách 1:

Trước hết, các bạn tiến hành tháo nắp đậy các xupap, sau đó ấn ngón tay vào cò mổ, quay vô lăng đúng chiều cho xupap thoát mở tối đa. Sau đó, đặt lá kim loại dày 0,05 ly vào giữa cò mổ và đuôi xupap, xoay vít chỉnh ở cò mổ vào hoặc ra đến khi lá kim loại vừa rít (không lỏng quá hoặc chặt quá); giữ cố định vít chỉnh, siết ốc khóa.

Đối với xupap thoát, bạn cũng tiến hành công việc như trên.

Cách 2:

Tiến hành chỉnh 2 xupap cùng một lúc:

Đầu tiên, bạn quay vô lăng theo đúng chiều cho xupap hút mở ra rồi đóng kín lại. Sau khi xupap hút vừa đóng kín, tiến hành quay vô lăng thêm nửa vòng cho chữ “T” đúng vào dấu cố định ở các-te (lúc này động cơ đang ở cuối thì ép, đầu thì nổ). Bạn tiến hành chỉnh khe hở cả hai xupap như trên.

Nếu như bạn không có kinh nghiệm để thực hiện việc này thì bạn nên mang xe của mình ra trung tâm sửa chữa, bảo dưỡng để được hỗ trợ. Việc thay xupap giá bao nhiêu? Là câu hỏi được nhiều người dùng quan tâm. Thực tế, việc sửa chữa hay thay thế chi tiết này không mất quá nhiều thời gian cũng như tiền bạc, vì thế bạn nên thường xuyên kiểm tra và tiến hành thay thế khi phát hiện ra các hư hỏng là điều vô cùng cần thiết.

Tham khảo thêm: Bật mí cách phục hồi bình ắc quy khô xe máy

Như vậy, với những cách chỉnh xupap xe máy chúng tôi đã cung cấp ở trên, hi vọng sẽ thật sự có ích đối với người dùng. Ngoài ra, để giúp xe của bạn có thể hoạt động tốt và ổn định, bạn cần thường xuyên bảo dưỡng, vệ sinh cho xe theo định kì, việc xịt rửa xe thường xuyên với máy rửa xe cao áp, máy rửa xe mini,… là công việc vô cùng quan trọng để xe vận hành bền bỉ và lâu bền hơn.

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