Bai 27-He Thong Cung Cap Nhien Lieu Va Kk Cho Dong Co Xang

8/14/2019 Bai 27-He Thong Cung Cap Nhien Lieu Va Kk Cho Dong Co Xang

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Cu hi bi c: Nhn vo s em hynu nguyn l lm vic ca h thng lmmt ng c bng khng kh


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I/- NHIM V V PHN LOI:

1/ NHIM V: H thng cung cp nhin liu v khng kh

(cn gi l h thng nhin liu) trong ng cxng c nhim v cung cp ho kh( hn hpxng v khng kh) sch vo xi-lanh ng c.Lng v t l ho kh phi ph hp vi cc

ch lm vic ca ng c.


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2. Phn loi:

Theo cu to b phn to thnh ho kh hthng c my loi ?

H thng nhin liu dng b ch ho kh.H thng nhin liu dng vi phun (thngc gi l h thng phun xng).


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B ch ho kh lm nhim v ho trn xngvi kk c t l ph hp vi cc ch lm vic

ca ng c. Bu lc kh lc sch bi bn ln trong kk.


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2. Nguyn l lm vic

Bu lc khngkh

B ch hokh

Xi lanh

Bu lc xng Bm xngThng xng

ng dn xng

ng dn khng kh

ng ho kh


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III/ H thng phun xng1/ Cu to

h thng phun xng xng c fun vo g` ng np or voxilanh ho trn vi kk to thnh ho kh. Fn ny chgii thiu v h thng fun xng vo ng np.

Ngoi mt s b fn tt ht dng b ch ho kh cn c thm

1 s b fn chnh l: B iu khin khung c nhim v k ch lm vic ca

vi fun ho kh c t l ph hp vi ch lm vic cang c. B k nhn tn hiu t cc cm bin o cc thng

s nh nhit ng c, s vng way ca trc khuu, xl thng tin v ft tn hiu k ch lm vic ca vi fun.


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B phn chnh p sut c nhim v gi

p sut xng vi fun lun mt tr snht nh trong sut w trnh lm vic. Vi fun c cu to nh 1 chic van, c

k = tn hiu in.


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B iu

Khin phun

ng ngnp

Bu lc kh

Xi lanhng c

Cc cm

bin

Bu lcxng

Bmxng

B iu chnhp xut

Viphun

ng xng chnh

ng xng hi

ng iu khin tn hiu

ng khng kh

ng ho kh


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2/ Nguyn l lm vic:

B iuKhin phun

ng ngnp

Bu lc kh

Xi lanhng c

Cc cmbin

Bu lcxng Bmxng B iu chnhp xut Viphun

ng xng chnh

ng xng hi

ng iu khin tn hiu

ng khng kh

ng ho kh

Thngxng


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Khi ng c lm vic, Khng kh c htvo xi lanh k ht do s chnh lch p xut.

Khi trc khuu quay, bm xng s ht xngt thng xng qua bu lc xng vo bm richuyn vo b iu chnh p xut, nh b iuChnh p xut, xng vi phun lun lun c p

xut n nh < nu p xut vt qu gi tr cho php thxngs c chuyn qua van an ton v thng xng >Cc cm bin tip nhn cc thng s v tnh trng,cc ch lm vic ca ng c cung cp cho b

iu khin phun vi phun phun 1 lng Nhinliu m bo cho s ho kh c t l tt nht.


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Bai 27-He Thong Cung Cap Nhien Lieu Va Kk Cho Dong Co Xang

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