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Author Topic: enjin DOCH ke enjin SOCH?  (Read 6570 times) Bookmark and Share
Blackburn
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« Reply #180 on: July 18, 2009, 01:40:46 pm »
Quote from: ~maxXximus~ on July 17, 2009, 04:36:45 pm
dah2 .... korang ni nak belajar bahasa ke ape plak dalam ni ...  Roll Eyes Roll Eyes dah tak tau term melayu, gune je terms dalam BI ... sume bukan tak penah pegi skolah ....


bro blackburn ... tak clear la explanation bro ni ...

enjin vtec walaupon ada 4v satu silinder,
cuma 2v beroperasi pada rpm rendah, 1x inlet 1x exhaust,
pada rpm >5800 barule cam kedua beroperasi, kdg2 dipanggil 'big cam'
maknanya selepas 5800rpm barule enjin vtec beroperasi dengan 4v
2x inlet 2x exhaust....
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~maxXximus~
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« Reply #181 on: July 18, 2009, 07:41:06 pm »
Quote from: Blackburn on July 18, 2009, 01:40:46 pm
enjin vtec walaupon ada 4v satu silinder,
cuma 2v beroperasi pada rpm rendah, 1x inlet 1x exhaust,
pada rpm >5800 barule cam kedua beroperasi, kdg2 dipanggil 'big cam'
maknanya selepas 5800rpm barule enjin vtec beroperasi dengan 4v
2x inlet 2x exhaust....

owh ok .... hmm ... bile cam kedua ni baru mula operate, dat means cam ni mmg dah totally electronic controlled la kan ? sebab bleh disable either one bile rpm rendah ?
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Blackburn
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« Reply #182 on: July 19, 2009, 12:04:46 am »
Quote from: ~maxXximus~ on July 18, 2009, 07:41:06 pm
owh ok .... hmm ... bile cam kedua ni baru mula operate, dat means cam ni mmg dah totally electronic controlled la kan ? sebab bleh disable either one bile rpm rendah ?

yopp!!!
vtec= variable timing&lift electronic control...
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« Reply #183 on: July 19, 2009, 12:37:09 am »
Quote from: Blackburn on July 19, 2009, 12:04:46 am
yopp!!!
vtec= variable timing&lift electronic control...

owh ... huhu ... tak penah tau plak maksud benda ni ....  Grin Grin
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akmal21987
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« Reply #184 on: July 19, 2009, 09:56:04 am »
Quote from: Blackburn on July 18, 2009, 01:40:46 pm
enjin vtec walaupon ada 4v satu silinder,
cuma 2v beroperasi pada rpm rendah, 1x inlet 1x exhaust,
pada rpm >5800 barule cam kedua beroperasi, kdg2 dipanggil 'big cam'
maknanya selepas 5800rpm barule enjin vtec beroperasi dengan 4v
2x inlet 2x exhaust....
vtec  setiap masa 4valve bergerak, cuma pada rpm sperti dimaksudkn, timing valve akan berubah skit..timing bukaan dan tutupan injap je berubah..

http://www.youtube.com/watch?v=6I53liuuhc4

http://en.wikipedia.org/wiki/I-VTEC

sbb itulah harga vtec punya enjin dlu kaw2 mahal..  Grin

*kalau 2valve aje yg pakai, kete tu mmg la ciput peginya.... Grin rujuk graph yg sy bagi sebelum ni..
enjin yg mmg pakai 2valve  pn ciput, apatah lagi enjin 4 valve dan hanya 2 valve je berfungsi..  Smiley
« Last Edit: July 19, 2009, 10:02:21 am by akmal21987 » Logged
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zaihany88
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Syg kriss Kuat2..;D
« Reply #185 on: July 19, 2009, 10:48:44 am »
Quote from: Blackburn on July 19, 2009, 12:04:46 am
yopp!!!
vtec= variable timing&lift electronic control...

ler..aku ingt Vtec = Valve Technology...hehehhe...

Quote from: akmal21987 on July 19, 2009, 09:56:04 am
vtec  setiap masa 4valve bergerak, cuma pada rpm sperti dimaksudkn, timing valve akan berubah skit..timing bukaan dan tutupan injap je berubah..

http://www.youtube.com/watch?v=6I53liuuhc4

http://en.wikipedia.org/wiki/I-VTEC

sbb itulah harga vtec punya enjin dlu kaw2 mahal..  Grin

*kalau 2valve aje yg pakai, kete tu mmg la ciput peginya.... Grin rujuk graph yg sy bagi sebelum ni..
enjin yg mmg pakai 2valve  pn ciput, apatah lagi enjin 4 valve dan hanya 2 valve je berfungsi..  Smiley

ha...yg penerangan ni betol... Grin Grin
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~maxXximus~
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« Reply #186 on: July 19, 2009, 11:29:40 am »
Quote from: zaihany88 on July 19, 2009, 10:48:44 am
ler..aku ingt Vtec = Valve Technology...hehehhe...

ha...yg penerangan ni betol... Grin Grin

so utk mane2 system yg ada vtec, mivec, vvti ni, maknenye pemasaan utk bukaan injap tu dikawal secara electronic la ... cam pun dikawal secara electronic ... tak terpikir mcm mane part dalam enjin mcm tu pun bleh dikawal electronically kan ... huhu ...  Grin
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hafizumi
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« Reply #187 on: July 19, 2009, 11:30:48 am »
Quote from: ~maxXximus~ on July 19, 2009, 11:29:40 am
so utk mane2 system yg ada vtec, mivec, vvti ni, maknenye pemasaan utk bukaan injap tu dikawal secara electronic la ... cam pun dikawal secara electronic ... tak terpikir mcm mane part dalam enjin mcm tu pun bleh dikawal electronically kan ... huhu ...  Grin

bleh aje.. mekanikal + elektronik..
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scooter fans
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« Reply #188 on: July 19, 2009, 12:44:27 pm »
jadi? tahu ka kenapa engine 4stroke dari ohv kemudian ohc, dari ohc kepada dohc??
dari dohc sampai variable cam timing?? yang electronic seperti ecu,efi, v-tec, ni saja technologi yang baru.
yang lain tu semua tech lama.jadi sini satu saya nak tanya,tahu tak selama ni engine 4stroke yang kama pakai ni tak efisen.kata kan lah engine 150cc.betul kah kamu dapat apa yang kamu bayar selama ni.
kenapa tanya begitu.!? Sebenar nya engine 4stroke ni berkerja merlawan masa
semasa RPM rendah,engine akan dapat pam angin dan patrol dengan efisen,apabila RPM tinggi,(5000) keatas,engine tak akan dapat angin dan patrol 150cc!! Ini kerana valve intake buka dan tutup dengan cepat,tu lah yamaha buat sampai 5valve DOHC.TETAPI masih tak efisen,ni kerana apa bila engine RPM naik ke atas7500 keatas!!KENAPA?? Huh Cheesy
yang ni kamu jawab sendiri.baru dapat berlajar bro.. Cheesy
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hafizumi
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« Reply #189 on: July 19, 2009, 12:46:29 pm »
Quote from: scooter fans on July 19, 2009, 12:44:27 pm
jadi? tahu ka kenapa engine 4stroke dari ohv kemudian ohc, dari ohc kepada dohc??
dari dohc sampai variable cam timing?? yang electronic seperti ecu,efi, v-tec, ni saja technologi yang baru.
yang lain tu semua tech lama.jadi sini satu saya nak tanya,tahu tak selama ni engine 4stroke yang kama pakai ni tak efisen.kata kan lah engine 150cc.betul kah kamu dapat apa yang kamu bayar selama ni.
kenapa tanya begitu.!? Sebenar nya engine 4stroke ni berkerja merlawan masa
semasa RPM rendah,engine akan dapat pam angin dan patrol dengan efisen,apabila RPM tinggi,(5000) keatas,engine tak akan dapat angin dan patrol 150cc!! Ini kerana valve intake buka dan tutup dengan cepat,tu lah yamaha buat sampai 5valve DOHC.TETAPI masih tak efisen,ni kerana apa bila engine RPM naik ke atas7500 keatas!!KENAPA?? Huh Cheesy
yang ni kamu jawab sendiri.baru dapat berlajar bro.. Cheesy

x salah la modi enjin kalo camtu..
enjin sedia ade x berape efisen..  Grin
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Blackburn
It is much easier to stop smoking than to recover from a stroke!!!
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« Reply #190 on: July 19, 2009, 02:12:10 pm »
Quote from: scooter fans on July 19, 2009, 12:44:27 pm
KENAPA?? Huh Cheesy
yang ni kamu jawab sendiri.baru dapat berlajar bro.. Cheesy

keperluan enjin berbeza pada rpm rendah/tinggi.
dari segi ignition timing, pada kelajuan idle biasa nya sekitar 8darjah, dan meningkat
ke sekitar 20darjah pada 5000rpm. sbb itu perlu ada mekanisma yang membolehkan timing
tersebut berubah mengikut kelajuan enjin.
bermula secara mekanikal menggunakan centrifugal spring, vacuum advance dan seterusnya
secara elektronik dgn kawalan ECU.
begitu juga dgn valve (injap), variable timing, variable lift dan seterusnya VT&L juga dgn kawalan ECU.
dgn enjin vtec transition berlaku sekitar 5800rpm, tetapi terdapat 'third-party' ECU seperti Jackson Racing
yang boleh mengawal dan melaraskan vtec serendah 2500rpm mengikut citarasa pengguna....

cth. yang paling baik kenapa perlunya sistem seperti vtec ini:-
anda sekarang sedang duduk berehat merenung komputer anda,
jantung anda berdenyut dengan kadar 70-80 seminit, kadar pernafasan 16-18.
tetapi apabila anda berlari, adakah kadar ini akan tetap seperti sediakala???

human machine Wink
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« Reply #191 on: July 19, 2009, 02:22:20 pm »
pening ...  Grin Grin
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akmal21987
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« Reply #192 on: July 19, 2009, 03:07:34 pm »
Quote from: ~maxXximus~ on July 19, 2009, 11:29:40 am
so utk mane2 system yg ada vtec, mivec, vvti ni, maknenye pemasaan utk bukaan injap tu dikawal secara electronic la ... cam pun dikawal secara electronic ... tak terpikir mcm mane part dalam enjin mcm tu pun bleh dikawal electronically kan ... huhu ...  Grin
BMW menggunakan motor elektronik utk membolehkan valve turun...  Smiley
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~maxXximus~
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« Reply #193 on: July 19, 2009, 03:14:36 pm »
Quote from: akmal21987 on July 19, 2009, 03:07:34 pm
BMW menggunakan motor elektronik utk membolehkan valve turun...  Smiley

tapi tak penah dgr bmw canang2 pasal system die ni macam mitsubishi atau honda kan ...  Grin Grin Grin
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Blackburn
It is much easier to stop smoking than to recover from a stroke!!!
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« Reply #194 on: July 19, 2009, 04:11:47 pm »
Quote from: ~maxXximus~ on July 19, 2009, 03:14:36 pm
tapi tak penah dgr bmw canang2 pasal system die ni macam mitsubishi atau honda kan ...  Grin Grin Grin

BMW panggil VANOS dan double Vanos...
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akmal21987
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« Reply #195 on: July 19, 2009, 04:17:01 pm »
biarlah rahsia...
VANOS..btul la tuh..... sapa2 leh tlg perbetulkan sila la..sy pn tak pasti sgt..apa yg pasti sy mmg ada terbaca buku kete dari UK tahun 90an(zaman peugeot 406 baru kluar n menang WTC)..sbb mmg nmpak jelas ada moto kat atas head die...satu motor utk satu valve...
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chocolate
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sabar banyak2
« Reply #196 on: July 19, 2009, 04:23:37 pm »
ducati ngan desmodromic valve control..x pki spring,valve control secara mekanikal,soo dah eliminate time ngan power loss utk spring bkk/tutup valve..

injap pneumatic..muto gp skrg dah pki sbb bleh set rpm lg tinggi..F1 dah lama pki sbb tu rpm kete2 F1 ni bleh over 20k..

p/s : sy budak baru nak blajar pasal 4 stroke,kl nak bahan pun agak2 la yer
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"don't judge a book by it's cover.." selalu kita dgr..tp kl dah buku tu buku playboy xkan la cover depan dia letak cover buku kalkulus..mestilah cover depan tu buku playboy..btol x? x btol sila le betulkan Roll Eyes
Blackburn
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« Reply #197 on: July 19, 2009, 04:25:00 pm »
 Grin Grin yang tu bukan motor..!!
high performance engine ada yang guna 1 ignition coil untuk a plug, tak share.
so kalau 6 silinder ada 6 ignition coil duduk atas head tu..
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Blackburn
It is much easier to stop smoking than to recover from a stroke!!!
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Ninjette rocks!
« Reply #198 on: July 19, 2009, 04:36:03 pm »
Quote from: chocolate on July 19, 2009, 04:23:37 pm
ducati ngan desmodromic valve control..x pki spring,valve control secara mekanikal,soo dah eliminate time ngan power loss utk spring bkk/tutup valve.

yupp!! btol3,
desmodromic='direct actuation'
senang cita, menggunakan dua rockerarms untuk satu valve, satu untuk menekan dan satu untuk mengangkat, jadi tak perlu spring.
tapi rockerarms masih lagi dikawal oleh cam...
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Not all men are annoying. Some are dead..!
Blackburn
It is much easier to stop smoking than to recover from a stroke!!!
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Ninjette rocks!
« Reply #199 on: July 19, 2009, 04:58:54 pm »
Quote from: akmal21987 on July 19, 2009, 04:17:01 pm

VANOS.....
biarlah rahsia...

VANOS=bahasa German (Variable Nockenwellen Steuerung), variable valve timing le kot?
cuma beroperasi pada intake valve timing. exhaust valve=constant. tidak ada perubahan lift pada ke2 injap intake&exhaust..
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