Chuong6 Dieu Khien He Thong an Toan

7/29/2019 Chuong6 Dieu Khien He Thong an Toan

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He thong ien than xe & ieu khien t ong tren oto Trang 187

c. So lng cam bien tui kh: (ch loai E)- Mot cam bien: Cam bien tui kh.- Ba cam bien: Cam bien tui kh trung tam va hai cam bien trc.

6.1.1.3. Cau truc c ban- Cam bien tui kh trung tam.- Bo thoi kh.- Tui kh.

Hnh 6.2: S o he thong tui kh loai M

Hnh 6.3: S o he thong tui kh loai E

6.1.2. He thong ieu khien day an toanai an toan la bien phap chnh e bao ve hanh khach. Viec eo ai an toantranh cho hanh khach khoi vang ra khoi xe khi co tai nan, ong thi giamphat sinh va ap th cap trong cabin.

Cam bien tui kh trung tam

Nguon

Cam bientui kh

trung tamva ECU

Cam biend phong

Chot tao kh Tui kh(cho lai xe)

Tui kh(cho hanh khach)

Chot tao kh

Ngoi no

Ngoi no

Bo thoi kh

Bo thoi kh

Cam bientui khtrc


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a. Phan loai:

ieu khien day an toan loai ien (loai E) ket hp vi he thong tui kh SRS

va kch hoat bang bo cam bien tui kh trung tam.ieu khien day an toan loai c kh (loai M) co cam bien rieng.

b. Cau truc c ban:

C cau cang ai khan capC cau cuonC cau khoa ELG

Mac du c cau ieu khien day an toan thay oi tuy theo nha san xuat, cautruc c ban cua chung giong nhau oi vi ca loai M va loai E, ch khac

nhau cach kch no chat tao kh. Loai M c lap mot cam bien cang aikhan cap, no kch no tao kh da tren lc giam toc va mot thiet b an toane khoa cam bien.

Hnh 6.4: Ket cau he thong ieu khien ai an toan

C cau khoa ELGC cau quan day ai

C cau cang aikhan cap

Cam bien bo cang ai(ch loai M)

Bo tao ngoi no

Thiet b an toan(ch loai M)

Phatrc

Ben phai


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6.2. S O, CAU TAO VA HOAT ONG CAC PHAN T VAHE THONG

6.2.1. S o, cau tao va hoat ong cac phan t va he thong tui khloai E

6.2.1.1. S o bo tr va chc nang cac bo phan cua tui kh loai Ea. S o

Hnh 6.5: S o bo tr cac chi tiet

Ghi chu:

1 : Ch oi vi xe co tui kh cho hanh khach trc.2 : Ch mot so xe co.3 : Neu xe co lap bo cang ai khan cap loai E, bo cam bien tui kh

gia kch hoat tui kh cung vi bo cang ai khan cap.b. Chc nang cac bo phan- Bo thoi kh: Tao ra kh Nit trong khoanh khac va thoi phong tui.- Tui: Phong len ngay lap tc bi kh t bo thoi kh va sau khi a phong

len, kh c thoat ra t cac lo ben di tui. Hap thu va ap trc tiepvao lai xe va hanh khach trc.

- Bo cam bien tui kh trc2: Cam nhan mc o giam toc cua xe.- Bo cam bien tui kh trung tam3: Quyet nh xem co can cho no tui kh

hay khong tuy theo lc giam toc do va cham t pha trc. Khi


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chuyen sang che o chan oan, no co tac dung chan oan xem co hhong trong he thong hay khong.

- en bao: Bat sang e cho lai xe trang thai khong bnh thng tronghe thong.

- Cap xoan: Truyen dong kch no cua bo cam bien tui kh trung tamen bo thoi kh.

6.2.1.2. Cau tao va hoat ong cua cac chi tieta. Bo thoi kh va tui

Cau tao:

- Cho lai xe: (Trong mat vanh tay lai)Bo thoi kh va tui c at trong vanh tay lai va khong the thao ri. Bo thoikh cha ngoi no, chat chay moi, chat tao kh, va thoi cang tui kh khi xeb am manh t pha trc. Tui kh c lam bang ny long co phu mot lpchat deo tren be mat ben trong. Tui kh co hai lo thoat kh ben di enhanh chong xa kh Nit sau khi tui kh a b no.

a.Cho lai xe b.Cho hanh khach trc

Hnh 6.6: Cau tao bo phan thoi kh


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- Cho hanh khach trc: (Trong bang taplo pha hanh khach)Bo thoi kh bao gom mot ngoi no, chat chay moi va chat tao kh. Cac chitiet nay c boc kn hoan toan trong hop kim loai. Tui kh c lam t vainy long ben va se c thoi phong len bang kh nit do bo thoi kh sinh ra.

Bo thoi kh va tui kh c gan ben trong vo va ca tui kh, roi at vaotrong bang taplo pha hanh khach. The tch cua tui kh pha hanh khach lngap oi so vi tui kh cho lai xe.

Hoat ong:

Hoat ong cua bo thoi kh va tui kh cho lai xe va hanh khach pha trc lagiong nhau. Khi cac cam bien tui kh bat do lc giam toc tao ra khi xe bam manh t pha trc, dong ien chay en ngoi no va nong len. Ket qua

la nhiet nay lam bat chay chat chay (cha trong ngoi no) va lam la lantruyen ngay lap tc en chat moi va chat tao kh. Chat tao kh tao ra motlng ln kh nit, kh nay i qua mang loc, c lam mat va sau o i vaotui. Tui phong len ngay lap tc bi kh. No xe rach mat vanh tay lai hayca tui kh va phong len trong khoang hanh khach. Tui kh xep nhanhxuong sau khi no do kh thoat qua cac lo kh xa kh. No lam giam lc vaap vao tui kh cung nh bao am tam nhn rong.

Hnh 6.7: S o hoat ong cua bo phan thoi kh


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b. Bo cam bien tui kh trung tam

Bo cam bien tui kh trung tam c lap tren san xe. No bao gom cam bientui kh trung tam, cam bien d phong mach chan oan

No nhan cac tn hieu t cac cam bien tui kh, anh gia xem co can kchhoat tui kh hay khong va chan oan h hong trong he thong

Cam bien c goi la cam bien tui kh trung tam khi trong xe co lapcam bien tui kh trc va c goi la Cam bien tui kh khi khong co cambien tui kh trc.

*1 : Cho tui kh hanh khach trc*2 : Cho cam bien tui kh trung tam loai c kh*3 : Cho bo cang ai khan cap loai ien t*4 : Cho mot so kieu xe

Hnh 6.8: S o mach ien cua cam bien tui kh trung tam

- Cam bien d phong, ngoi no va cam bien tui kh trung tam c mac noitiep .

- Cam bien tui kh trc va cam bien tui kh trung tam c mac song song.-

(Ch mot so xe co)- Cac ngoi no c mac song song.

Machnguon d

phong

Cam biendphong

Mach bonh

RAMEEPROM

Cambien

tui khgia

Mach chanoan

Mach dan ong vaieu khien kch no

Cam bien tui khtrung tam

Bo cam bien tui kh trung tamCap xoan

Ngoi no

Ngoi noNgoi no *1

Cac cam bien tuikh trc

Giac kiem tra

TDC

en bao

Cong tac may


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Cam bien tui kh trung tam:Co hai loai cam bien tui kh trung tam: loai ban dan dung thc thang valoai c kh.

Loai ban dan:

- Trong loai ban dan, cam bien nay phat hien mc o giam toc. Motmach ieu khien kch no va dan ong anh gia xem co can kch hoattui kh hay khong va kch hoat tui kh da tren tn hieu cua cam bientui kh trung tam.

Hnh 6.9: Cam bien tui kh trung tam loai ban dan

Cam bien loai ban dan bao gom mot thc thang va mot mach tch hp.Cam bien nay o va chuyen oi lc giam toc thanh tn hieu ien. ien aptn hieu phat ra thay oi tuyen tnh theo mc o giam toc. Tn hieu nay sauo c gi en mach ieu khien kch no va c dung e anh gia xem cocan kch hoat tui kh hay khong.

Loai c kh:

oi vi loai c kh, cam bien nay kch hoat tui kh bang cach phat hien mco giam toc.

Cac tiep iem cua cam bien tiep xuc va kch hoat tui kh khi cam bien chumot lc giam toc ln hn mc xac nh do b am t pha trc.

Cam bien d phong:Co mot so loai cam bien d phong, nh loai c kh co cac tiep iem ongbang vat nang, loai cong tac thuy ngan loai cam bien nay c che taosao cho tui kh khong b kch hoat nham khi khong can thiet. Cam bien nayb kch hoat bi lc giam toc nho hn mot chut so vi lc kch hoat tu i kh.

Vat nangLc giam toc

Pha trc

Thc thang

Mach tch hp


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Hnh 6.10: Cau tao cua cam bien d phong

Mach dan ong va ieu khien kch no: (Cho cam bien tui kh trung tam loaiban dan).

Mach dan ong va ieu khien kch no tnh toan tn hieu t cam bien tui khtrung tam. Neu gia tr tnh toan c ln hn mot gia tr nhat nh, no kchhoat ngoi no va lam no tui kh.

Nguon d phong:

Nguon d phong bao gom mot tu ien d phong va mot bo chuyen oi DC DC. Trong trng hp he thong nguon b hong do tai nan, tu d phong sephong ien va cap nguon cho he thong. Bo chuyen oi DC DC la mot botruyen tang cng dong khi ien ap ac qui thap hn mc nhat nh.

Mach chan oan:

Mach nay lien tuc chan oan he thong e tm ra h hong. Khi phat hien

thay h hong, no bat sang en bao tui kh e bao cho lai xe.

Mach nh:

Khi mach chan oan phat hien thay co h hong, no anh ma va lu vaomach nh nay. Sau o co the oc c cac ma nay e xac nh v tr cua hhong nham khac phuc s co nhanh hn. Tuy theo kieu xe, mach nh nayhoat la loai b xoa khi mat nguon ien hoac la loai van lu lai c thamch khi ngat nguon ien.


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c. Cam bien tui kh trc: (Ch mot so kieu xe)

Cam bien tui kh trc c lap ben trong cua hai sn trc (tuy theo loaixe). Bo cam bien nay la loai c kh. Khi cam bien phat hien lc giam toc

vt qua gii han nhat nh cho xe b am t pha trc, cac tiep iemtrong cam bien cham vao nhau, gi mot tn hieu en bo cam bien tu i khtrung tam. Cam bien nay khong the thao ri ra.

He thong tui kh SRS khong co cam bien tui kh trc c s dung phobien trong cac kieu xe hien nay.

Chu y: Cam bien tui kh trc khong the dung lai c khi tui kh a b no. o labi v co mot dong ien ln chay qua tiep iem khi tui kh no, lam an mon be mat

tiep xuc cua tiep iem, ket qua la co the tao ra ien tr rat ln.

Cau tao:

Bo cam bien bao gom vo, roto lech tam, khoi lng lech tam, tiep iem conh va tiep iem quay. Mot ien tr c lap ben ngoai cua bo cam bien.No c dung e chan oan h mach hay ngan mach trong mach cam bientui kh trc.

Hnh 6.11: Cau tao cua cam bien tui kh trc

Hoat ong:

Thong thng, ro to lech tam trang thai nh hnh ve di ( trang thaibnh thng) do lc cua lo xo la. Do vay tiep iem co nh va tiep iemquay khong tiep xuc nhau. Khi co tai nan, va neu mc o giam toc tac dunglen khoi lng lech tam vt qua mot gia tr xac nh, khoi lng lech tam,


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ro to lech tam va tiep iem quay se quay sang ben trai, tao nen trang thainh trong hnh di (trang thai kch hoat). No lam cho tiep iem quay tiepxuc vi tiep iem co nh va cam bien tui kh c bat.

Hnh 6.12: S o hoat ong cua cam bien tui kh trc

d. Cap xoan

Cap xoan c dung e noi ien t pha than xe (co nh) en vanh tay lai(chuyen ong quay).

Cap xoan c cau tao t oto, vo, cap, cam huy

Vo c lap trong cum cong tac tong. Roto quay cung vi vanh tay lai.

Cap co chieu dai 4,8 m va c at ben trong vo sao cho no b chung. Motau cua cap c gan vao vo, con au kia gan vao roto.

Khi vanh tay lai quay sang phai hay trai, no co the quay c ch bang ochung cua cap (2 va vong).

Hnh 6.13: Cau tao cap xoan

Bo cong tac

Truc laiCap

Phan quay

Cam huy

Giac noien ngoi no

Vo


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e. Cac giac noi:

Tat ca cac giac noi cua he thong tui kh SCRS c lam mau vang e phanbiet vi cac giac noi khac. Cac giac co chc nang ac biet va c thiet ke

ac biet dung cho tui khi v tr nh di ay nham am bao o tin cay cao.Cac giac noi c ma vang co o ben cao.

Hnh 6.14:V tr cac giac noi

Ten Ap dung

C cau khoa cc kep Giac,,,,,,

C cau chong kch hoat tui kh Giac,,,

C cau kiem tra noi ien Giac,,

Ccau khoa giac noi kep Giac

,

,

,

Ch mot so kieu xe

C cau khoa cc kep:

Moi giac noi la mot ket cau hai manh bao gom vo va mieng cach. Thiet kenay am bao ham chac cc bang hai thiet b khoa (vong kep va mui kep)de ngan khong cho cac cc tuot ra.

1

3

6

5

4

2

7


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Hnh 6.15: C cau khoa cc kep

C cau chong kch hoat tui kh:

Moi giac noi c la mot lo xo noi tat. Khi thao giac ra, la lo xo noi tat tongnoi cac cc cua ngoi no e tao thanh mach kn.

Hnh 6.16: C cau chong kch hoat tui kh

Giac thao raGiac a noi

Lo xo noi tat

Vo

Vo

Lo xo tiep xucvi cc c

Cac ccLo xo giac noi

Giac a noi Giac thao raLo xo ngan mach noi

Mach ong

Ngoi noNgoi no


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C cau kiem tra s noi ien:

C cau nay c thiet ke e kiem tra xem cac giac noi a noi chat cha.

C cau kiem tra s noi ien c thiet ke sao cho chan phat hien s noiien noi vi cc chan oan khi khoa vo giac v tr khoa.

C cau nay c dung cho giac noi cam bien tui kh trc va bo cam bientui kh trung tam.

Hnh 6.17: C cau kiem tra s noi ien

C cau khoa giac noi kep:

Vi c cau nay, cac giac c khoa bang hai thiet b khoa e tang o tincay cua giac noi. Neu khoa chnh khong khoa het, phan gan se cham vaonhau khong cho khoa phu.

Noi na chng Noi hoan toanCc chan oan

Chan phat hien noi Chan phat hiennoi tiep xuc vi cc

Chan phathien noi

Cc chan oan


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Hnh 6.18: C cau khoa giac kep

f. Chc nang t chan oan

Mach chan oan thng xuyen kiem tra h hong cua he thong tui kh haitrang thai sau:

Kiem tra s bo:

Khi khoa ien c bat en v tr ACC hay ON t v tr LOCK, mach chan

oan bat en bao tui kh trong khoang 6 giay e tien hanh kiem tra s bo.Neu phat hien thay h hong khi kiem tra s bo, en bao tui kh khong tati ma van sang tham ch khi 6 giay a troi qua.

Kiem tra thng xuyen:

Neu khong phat hien thay h hong khi kiem tra s bo, en bao tui kh setat sau khoang 6 giay e cho phep ngoi no san sang kch no . Mach chanoan bat au che o kiem tra thng xuyen e kiem tra cac chi tiet, hethong cap nguon va day ien xem co h hong, h hay ngat mach khong.

Neu phat hien thay co h hong, en bao tui kh bat sang e bao cho lai xe.

Khoa ienbat en ACC

hay ONKiem tra sbo (trong 6

giay)

1

Kiem trathngxuyen

2

Khoa phu

Khoa Khoa

Gan

Khoa chnh

Khoa chnh cha khoa han(khong cho khoa phu khoa)

Khoa chnh khoa han( cho phep khoa phu khoa)

Ca hai khoa han


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Kiem tra ma chan oan:

Co the oc c ma chan oan nh sau: So cua ma c bao bang cachnhay en bao.

- Xoay khoa ien en v tr ACC hay ON- Noi cc Tc va E1 cua TDCL (DLC2) hay giac kiem tra (DLC1)

Hnh 6.19: Cau tao giac kiem tra

en bao se bat au nhay e bao ma

Xoa ma chan oan:

ON

OFF

0.25 giay 0.25 giay

Bao lai0,5 giay1,5 giay

0,5 giay 2,5 giay

a. Ma bnh thng

b. Ma chan oan(v du: Ma 11 va 31)

Tc E1

E1

Tc


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Sau khi h hong a c sa cha, en bao se khong tat i khi khoa ien v tr ACC hay ON tr khi ma lu lai c xoa i. Quy trnh xoa ma lu laithay oi tuy theo loai mach nh.

oi vi mach nh loai RAM (bo nh truy cap ngau nhien) thong thng noidung bo nh b xoa khi ngat nguon ien.

oi vi mach nh EEPROM (hay c goi la RAM khong b xoa) loai nayco the ghi xoa c. Noi dung bo nh khong b xoa tham ch khi ngatnguon ien.

RAM thng xuyen khong co nguon d phong. Ma ghi lai b xoa bang cachbat khoa ien en v tr LOCK. Loai nay ch c s dung rong rai trongcam bien tui kh loai mi nhat.

EEPROM. Ma ghi lai khong b xoa tham ch khi cap Accu b thao ra. Cothe xoa ma bang cach nhap cac tn hieu at biet vao bo cam bien tui khtrung tam.

RAM thng co nguon d phong va EEPROM. Khi ma chan oan c lutrong RAM thng, chung co the b xoa khi thao cap khoi Accu. Tuy nhienluc nay ma 41 c ghi vao trong EEPROM. Ket qua la khi khoa ien baten v tr ACC hay ON en bao van sang.

6.2.1.3. Hoat ong cua he thong tui khKhi co va ap manh t pha trc, he thong tui kh phat hien s giam toc vakch no bo thoi tui kh. Sau o phan ng hoa hoc trong bo thoi kh ngay laptc ien ay tui bang kh nit khong oc e giam nhe chuyen ong ve phatrc cua hanh khach .

ieu nay giup bao ve au va mat khong b ap vao vanh tay lai hay bangtaplo. Khi tui kh xep xuong, no tiep tuc hap thu nang lng. Toan bo quatrnh cang phong, bao ve, xep xuong dien ra trong vong mot giay.

Hnh 6.20: Qua trnh hoat ong cua tui kh


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Khi nao tui kh se no va khong no

- Tui kh se no:Tui kh c thiet ke e kch hoat trong trng hp co va cham manh tpha trc xay ra trong vung gach cheo gia cac mui ten nh hnh ve. Tuikh se phat no neu mc o nghiem trong cua va ap ln hn mot mc nhtrc, tng ng vi mot cu am thang vao mot vat can co nh khong dchchuyen hay bien dang toc o 20-30km/h. Neu mc o nghiem trong chaen mc o nay, tui kh co the khong no.

Hnh 6.21: Mo ta vung va cham tui kh se no

Tuy nhien, toc o gii han nay se cao hn nhieu neu xe am vao mot vatco the chuyen ong hay bien dang di tac dung cua va ap nh xe ango hay cot bien bao, hay khi no b am chom len hay chui au vao mot vatkhac nh san xe tai. Co the vi mot mc o nghiem trong cua tai nan gan

bang vi mc o phat hien cua cam bien tui kh ch lam cho mot trong haitui kh cua xe phat no.

- Tui kh se khong no:Tui kh c thiet ke se khong no neu xe b am t pha sau, hay be sn,khi no b lat, am t pha trc vi toc o thap.


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Hnh 6.22: Mo ta vung va cham tui kh se khong no

am t pha sau vi toc o thap

am t pha trc vi toc o thap

Lat xe


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6.2.2. Tui kh loai SRS ieu khien bang c kh (M)6.2.2.1. S o bo tr cac chi tiet va chc nang:

Hnh 6.23: S o bo tr cac chi tiet

Bo phan Chc nang

Cam bien tui kh Phat hien mc o giam toc khi b am t pha trc

Bo thoi kh Ngay lap tc tao ra kh nit e bm cang tui kh

TuiCang phong ngay lap tc bang kh nit t bo thoi khva khi tui kh cang phongkh that ra khoi lo pha sau

tui, do do giam lc va ap cho lai xe.

6.2.2.2. Cau tao va hoat onga. Cam bien tui kh

Cau tao:

Cam bien c at ben trong bo thoi kh bao gom mot vat nang(vien bi) ephat hien lc giam toc, mot kim hoa e kch ngoi no Mac du ket cau thay

oi tuy theo kieu xe nhng toan bo cum cam bien c bao kn an toan.


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Ngoai ra, mot thiet b an toan cung c lap at e ngan khong cho hethong tui kh kch no khi thao mat vanh tay lai.

Hnh 6.24: Cau tao cam bien tui kh loai M

Hoat ong:

Kim hoa c cai vao truc kim hoa hay vat nang qua a cam, do o ngankhong cho kim hoa phong ra. Khi lc giam toc do xe b am t pha trcln hn mot gia tr xac nh, chuyen ong cua vat nang thang lc lo xo chotty hay lo xo xoan. Ket qua la kim hoa c nha ra khoi truc kim hoa haya cam. Kim hoa sau o phong ra bang lc lo xo kim hoa hay lo xo xoane kch no ngoi no.


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Hnh 6.25: S o hoat ong cua cam bien tui kh loai M

b. Thiet b an toan

Mac du cau tao thay oi tuy theo kieu xe, can khoa ben trong kieu xe lamngng chuyen ong cua vat nang khi bulong nha khoa cam bien c ni

long hay can nha khoa cam bien b keo ra.

Do o, vat nang khong the di chuyen tham ch khi co lc giam toc manh tacdung len, v vay khong cho kch hoat tui kh.

Sau khi lap mat vanh tay lai , can khoa ben trong cam bien tui kh c trave v tr ban au cua no bang cach van chat bulong nha khoa cam bien hayay can vao v tr ban au cua no. Do o, vat nang c t do chuyen ongkhi can thiet.

Ngoi no

Lo xo xoanKhoi lng

Vau cam Kim hoa

Giam toc

Lo xo kim hoaNgoi no

Kim hoa

Truc kim hoa

Lo xo chot ty

Giam toc


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Hnh 6.26:Cau tao cua thiet b an toan

c. Bo phan thoi kh:

Cau tao:

Bo phan thoi kh bao gom ngoi no, chat nay moi, chat tao kh Chat taokh tao ra kh nit e thoi tui kh khi xe b am manh t pha trc. Phanben trong cua bo thoi kh c bao kn hoan toan va kn kh. Tui kh clam bang nylong co phu cao su ben trong. No co hai lo pha sau e xa kh

nit vao kh quyen sau khi cang phong len.

Hnh 6.27: Cau tao bo phan thoi kh

Tui khCam bien tui kh

Bo thoi kh


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Hoat ong:

Cam bien tui kh b kch hoat bi s giam toc do xe b am t pha trc,va kch no ngoi no trong bo thoi kh. Ngon la lan truyen ngay tc khac

en chat chay moi va chat tao kh, chat tao kh sinh ra mot lng ln khnit. Tui kh se pha v phan mong cua vanh tay lai khi no phong len trc mat ngi lai xe e lam giam nguy c au va mat cua ngi lai xeap thang vao vanh tay lai.

Hnh 6.28:Mo ta hoat ong cua bo thoi kh va tui kh

6.2.3. Cau tao va hoat ong cua cac phan t he thong ieu khienday an toan

a. C cau ieu khien cang ai khan cap

Mac du c cau cang ai khan cap khac nhau tuy theo nha san xuat, pittonghay roto ieu hoat ong bang mot lng ln lng kh tao ra bi bo tao kh,no lam cho day ai b cuon vao mot lng nhat nh.

Bo cang ai khan cap ch hoat ong mot lan.

Trong trng hp loai 1, do truc b khoa bi trong va cap sau khi bo cang

ai khan cap hoat ong, day ai khong the keo ra hay cuon vao c.

Mang

Ngoi no

Chat chay moi

Chat tao kh


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Hnh 6.29: Cau tao c cau ieu khien cang ai khan cap loai 1

Trong trng hp loai 2, khp khoa co the tach ra khoi banh rang sau khibo cang ai khan cap hoat ong. Neu chung tach nhau ra khoi day ai cothe cuon vao hay thao ra.

Khp banh rang

Khoa Chat tao kh

Ro to

Kh Ca thoat

Bnh thng Kch hoat

Loai 2

Hnh 6.30: Cau tao c cau ieu khien cang ai khan cap loai 2.

ai an toan

ai an toanai an toan

Truc

Cap

Kh

PistonPiston

Xy lanh

Cap

Truc

Bnh thngKch hoat

Loai 1

Trong cuon


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b. Bo tao kh loai E

Bo tao kh bao gom mot ngoi no (day toc va chat chay moi) va chat tao khat trong vo bang kim loai. khi cam bien tui kh bat, dong ien c cap

ien ti s day toc trong ngoi no, kch no chat chay moi.

Ngay lap tc sau o, la c truyen en chat tao kh trong thi gian ccngan tao ra ap suat cao.

Hnh 6.31: Cau tao bo tao kh loai E

Chu y:

Ngoi no b kch no tham ch khi co dong yeu. Do o rat nguy hiem, khongbao gi o ien tr ngoi no bang von/om ke...

c. Bo tao kh co cam bien loai M

Mac du ket cau bo cua cam bien cang ai thay oi tuy theo kieu xe, cautao giong giong nh cam bien tui kh loai M. No bao gom mot vat nang ephat hien lc giam toc va mot kim hoa e kch no ngo i no...

ieu kien e kch hoat bo cang ai khan cap cung giong nh he thong tuikh.

Kim hoa thng xuyen an khp vi truc kim hoa hay can khoa, do o nongan khong cho kim hoa phong ra.

Khi lc giam toc sinh ra do xe b am t pha trc vt qua mc qui nh,chuyen ong cua vat nang thang lc lo xo chot ty. Ket qua la, chot kim hoanhay ra khoi truc kim hoa hay can khoa, sau o no c phong ra t lc cualo xo kim hoa e kch no ngoi no.

Chat tao kh

Vo

Chat chay hoiNgoi no


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d. Thiet b an toan

e ngan chan bo cang ai phat no bat ng khi thao ai an toan hay khivan chuyen bo cang ai khan cap, no c trang b mot thiet b an toan engng hoat ong cua cam bien.

Lo xo kim hoaKim hoa

Chat tao kh

Ngoi no

Lo xo chot ty Khoi quan tnh

Truc quan tnh

Lo xo kim hoa

Kim hoa

Chat tao khNgoi no

Lo xo chot ty

Can chot cai

Khoi quan tnh

Chuong6 Dieu Khien He Thong an Toan

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