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Author Topic: enjin DOCH ke enjin SOCH?  (Read 4515 times) Bookmark and Share
Blackburn
It is much easier to stop smoking than to recover from a stroke!!!
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« Reply #140 on: July 10, 2009, 12:49:10 pm »
Quote from: raup88 on July 10, 2009, 12:22:53 pm

satu lagi nak tanya enjin dohc sedap dkt rpm tinggi ke rpm rendah ke rpm tgh2? Huh

rpm tinggi Wink
engine honda typeR (car) rpm rendah 2valve saja,
lepas 5800rpm baru buka 4.
enjin 4v kalau tak ada vvt low-end performance tak bagus.

OHV tu teknologi purba, masih menggunakan push-rod & rocker untuk control valve opening, tapi masih lagi digunakan pada enjin besar sebab more relaible.
tak ada timing chain atau belt nak putus..
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wak_amat
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« Reply #141 on: July 10, 2009, 01:15:01 pm »
Quote from: Blackburn on July 10, 2009, 12:49:10 pm
rpm tinggi Wink
engine honda typeR (car) rpm rendah 2valve saja,
lepas 5800rpm baru buka 4.
enjin 4v kalau tak ada vvt low-end performance tak bagus.

OHV tu teknologi purba, masih menggunakan push-rod & rocker untuk control valve opening, tapi masih lagi digunakan pada enjin besar sebab more relaible.
tak ada timing chain atau belt nak putus..

Ish3x. toksahla kata purba. tu zaman dianosor, enjin pun takde lagi. roda pun mereka tak kenal lagi.... hahaha

Kita pakai SOHC ke DOHC ke pushrod ke, valve duduk kat head, kat permukaan piston. Maka ia disebut OverHead valve. Pakai teknologi VVT pun valve kat atas head, OHV jugak. alamak aku punya kereta pakai DOHC teknologi purba jugak ler...

Yang bukan OHV ialah valve duduk sama position dengan blok & piston macam enjin lama2. Head cuma sekeping (tebal & kukuh) dan letak spark plug je macam head enjin moto 2-stroke. Jenis macam ni pun masih ada gak. tapi taklah purba lagi kot...
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raup88
Jangan dengki saya ada
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kalau delete x demokrasi la..... hehehee........
« Reply #142 on: July 10, 2009, 02:16:15 pm »
enjin suzuki swift VVT kan?
DVVT tu pekebenda plak?
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Blackburn
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« Reply #143 on: July 10, 2009, 02:39:48 pm »
btol3
bezanya ohv ngan ohc saja, kedudukan cam tu,
ohv cam dok bawah, diputar direct oleh crankshaft/half speed. pushrod digerakkan oleh camlobe. pushrod ni mcm galah le, so dia akan jolok rokerarm kat atas tu...

DVVT VVti vtech mivec tu semua benda yang sama cuma perlaksanaanya berbeza. ada yang electronic controlled ada yang hydrulic control ada yang mechanical control, mengikut kecanggihan teknologi masing2.

mcm enjin dulu2 yg pakai contact breaker. cara advance timing berbeza2, ada yang guna centrifugal spring, vacuum & lain2. tapi sekarang semua dah guna electronic auto-advance.

makin poning?
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wak_amat
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« Reply #144 on: July 10, 2009, 03:07:30 pm »
Quote from: raup88 on July 10, 2009, 02:16:15 pm
enjin suzuki swift VVT kan?
DVVT tu pekebenda plak?


Quote from: Blackburn on July 10, 2009, 02:39:48 pm
btol3
bezanya ohv ngan ohc saja, kedudukan cam tu,
ohv cam dok bawah, diputar direct oleh crankshaft/half speed. pushrod digerakkan oleh camlobe. pushrod ni mcm galah le, so dia akan jolok rokerarm kat atas tu...

DVVT VVti vtech mivec tu semua benda yang sama cuma perlaksanaanya berbeza. ada yang electronic controlled ada yang hydrulic control ada yang mechanical control, mengikut kecanggihan teknologi masing2.

mcm enjin dulu2 yg pakai contact breaker. cara advance timing berbeza2, ada yang guna centrifugal spring, vacuum & lain2. tapi sekarang semua dah guna electronic auto-advance.

makin poning?

VVT tu generic term untuk variable valve timing. Macam Blackburn bgtau, jenama ikut suka pengeluar tu nak, Toyota VVT-i, Daihatsu DVVT, Honda VTec Mitsubishi Mivec dsb., dengan kaedah masing2, untuk ubah valve timing.. DVVT singkatan Dynamically Variable Valve Timing, ada yang kata Daihatsu VVT... ntah pandai2 je aku..

OHV dengan OHC beza banyak, bukan takat kedudukan cam...

OHV - perihal kedudukan intake & exhaust valve enjin.
Kalau ia OHV, valve duduk kat head. boleh jadi cam duduk kat head jugak (OHC), boleh jadi cam duduk kat blok, dan pakai pushrod.
Manakala non-OHV, valve kat silinder blok, head sebagai penutup je macam head 2-stroke. Sebab valve kat bawah jugak, confirm cam pun kat bawah.

OHC - perihal kedudukan camshaft yang buka/tutup valve. Kalau OHC, kena ada timing-belt atau timing-chain untuk pusingkan camshaft tu. Tak pun ada shaft dengan gearset yang memusingkannya.

google2 lah untuk dapat penerangan lanjut..
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scooter fans
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« Reply #145 on: July 10, 2009, 07:16:04 pm »
ok. :)semua dah paham ni,jadi berapa jenis kamu dah buka ni?aku baru siap overhual satu unit yang ohv 6 in line ni Grin. tapi dia pakai timing gear...diesel engine lah Cheesy
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~maxXximus~
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« Reply #146 on: July 11, 2009, 11:21:43 am »
Quote from: scooter fans on July 10, 2009, 07:16:04 pm
ok. :)semua dah paham ni,jadi berapa jenis kamu dah buka ni?aku baru siap overhual satu unit yang ohv 6 in line ni Grin. tapi dia pakai timing gear...diesel engine lah Cheesy

still tak faham lagi ... still need more info from u guys ...  Wink korang terang dalam cara yg paling mudah difahami ... teruskan2 ... dahaga btul nak belajar pasal benda2 ni ....  Wink Wink Wink
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zaihany88
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« Reply #147 on: July 11, 2009, 12:13:14 pm »
hmmm..mmg la...kalo bole nak gambo baru phm bender2 ni...
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~maxXximus~
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« Reply #148 on: July 11, 2009, 02:12:40 pm »
Quote from: zaihany88 on July 11, 2009, 12:13:14 pm
hmmm..mmg la...kalo bole nak gambo baru phm bender2 ni...

tutorial bergambar la kirenye ni ...  Grin Grin try la google2 tgk ... kadang2 bleh nampak lagi clear ...  Wink
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hafizumi
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« Reply #149 on: July 11, 2009, 04:21:56 pm »
Quote from: ~maxXximus~ on July 11, 2009, 11:21:43 am
still tak faham lagi ... still need more info from u guys ...  Wink korang terang dalam cara yg paling mudah difahami ... teruskan2 ... dahaga btul nak belajar pasal benda2 ni ....  Wink Wink Wink

maxx.. dh otai nnt ajar aku ekk..  Grin
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scooter fans
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« Reply #150 on: July 11, 2009, 08:27:18 pm »
 kalau betul betul mahu faham mesti mahu on hand traning tu Smiley
kalau 1 cylinder tu senang sikit, tapi kalau sampai 6 cylinder tu,ada pening sikit. Grin dia sama aja,tapi firing order tu kadang kadang lain Grin.jadi ada mamber adjust teppet tu pening kapala Cheesy
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« Reply #151 on: July 12, 2009, 03:09:48 am »
Quote from: scooter fans on July 11, 2009, 08:27:18 pm
kalau betul betul mahu faham mesti mahu on hand traning tu Smiley
kalau 1 cylinder tu senang sikit, tapi kalau sampai 6 cylinder tu,ada pening sikit. Grin dia sama aja,tapi firing order tu kadang kadang lain Grin.jadi ada mamber adjust teppet tu pening kapala Cheesy

takpe .... kite abeskan belajar yg satu cylinder dulu ... baru kite study yg 6-12 cylinder ...  Grin

Quote from: hafizumi on July 11, 2009, 04:21:56 pm
maxx.. dh otai nnt ajar aku ekk..  Grin

byk la ko ... ni hobi je ni .... bkn nak buat ape pun ... huhu ...
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suzie
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« Reply #152 on: July 14, 2009, 10:31:40 am »
Quote from: majapahit on April 23, 2009, 07:16:32 pm
slm kpd sume bro n sis..
hamba ingin tau ap beza enjin CBR DOHC ngan enjin FZ SOHC?
mn stu yg molek?...
hrp bro n sis dpt bntu...
dohc lah brother
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mimalif
dulu jd peon tak pakai
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« Reply #153 on: July 14, 2009, 01:48:29 pm »
torque mana lbh kuat?? aka kuasa menarik betui kaa??

dohc atau sohc??
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musbiaggi
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« Reply #154 on: July 14, 2009, 01:49:46 pm »
Quote from: mimalif on July 14, 2009, 01:48:29 pm
torque mana lbh kuat?? aka kuasa menarik betui kaa??

dohc atau sohc??

tgk cc la

kalau SOHC kasi bore kaw3.. mesti lagi kuat
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~maxXximus~
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« Reply #155 on: July 14, 2009, 05:01:02 pm »
Quote from: mimalif on July 14, 2009, 01:48:29 pm
torque mana lbh kuat?? aka kuasa menarik betui kaa??

dohc atau sohc??

kalao dgn cc yang sama, rasenye mesti la dohc ... sebab pengalaman bawak kete enjin Dohc 1.5 ngan Sohc 1.5, time naek bukit sgt rileks bile bawak Dohc ni ...  Wink Wink  siap bleh increase speed lagi ... tatau la kalao ade benda lain yg bg effect mcm tu ... huhu ...
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gifted_hand
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nineleven
« Reply #156 on: July 14, 2009, 07:12:42 pm »
max nie diam2 serap ilmu gak eh.. huu. aku pun same.. ade yg pahm ade yg kurang.. keep up bro...
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« Reply #157 on: July 14, 2009, 09:20:30 pm »
Quote from: gifted_hand on July 14, 2009, 07:12:42 pm
max nie diam2 serap ilmu gak eh.. huu. aku pun same.. ade yg pahm ade yg kurang.. keep up bro...

tuntut ilmu sampai mati pun kene tuntut ... tak gitu ? skang ni tgh syok layan thread ni ...  Wink Wink
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ska_blur
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moto? kete? kawin? penin..........
« Reply #158 on: July 14, 2009, 09:25:08 pm »
double cam--dua camshaft
single cam--satu camshaft

camner dia ejas timing pening gak macam kete la plak hehe
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« Reply #159 on: July 14, 2009, 09:38:08 pm »
Quote from: ska_blur on July 14, 2009, 09:25:08 pm
double cam--dua camshaft
single cam--satu camshaft

camner dia ejas timing pening gak macam kete la plak hehe

kalao utk kete ... rasenye sume dah pakai electronic dah utk adjustment ni ... kalao utk moto ni aku tak sure la ... kene tggu org lain masuk bg explaination la ...
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"ısɐuıʇsǝp ɐqıʇ 'ısɐʞıɟıpoɯ ɐpɐıʇ"  sʌ  "ɐɯısʞɐɯ uɐnɾɐlǝʞ 'ɐɯıuıɯ soʞ"
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