conclusion: OCT untuk ngejar power tapi gak go green..........................
cmiiw lagi.................. "Marcel Brata®" <[email protected]> Sent by: [email protected] 09/04/2010 11:42 Please respond to [email protected] To "Baleno millis" <[email protected]> cc Subject Re: [baleno] Oot : Oil Catch Tank made in Cianjur by Twin Garage Sebenarnya mengenai blow-by gass ini kalo dulu saya diterangkan waktu training bisa menyebabkan polusi jika langsung dilepas ke udara.Oleh karena itu gas ini "diakali" dengan cara dibakar kembali ke ruang mesin agar dapat ditekan polusinya...Tp ya sebenarnya konsekuensinya power agak turun karena udara masuk yg ke intake manifold tidak murni udara bersih, melainkan ada sebagian udara sisa pembakaran "blow by gas" ini...Cmiiw yah..Berikut hasil googling di wikipedia:As an engine operates, high-pressure gases are contained within the combustion chamber and prevented from passing into the crankcase (containing the crankshaft and other parts) between the side of the piston and the cylinder bore by piston rings which seal against the cylinder. However, some amount of gas always leaks past the piston rings into the crankcase. This amount is very small in a new or properly rebuilt engine, provided that the piston rings and cylinder walls are correctly "broken in", and increases as the engine wears. Scratches on the cylinder walls or piston rings, such as those caused by foreign objects entering the engine, can cause large amounts of leakage. This leaked gas is known as blow-by because the pressure within the cylinders blows it by the piston rings. If this blow-by gas could not escape then pressure would build up within the crankcase.Before the invention of crankcase ventilation in 1928, the engine oil seals were designed to withstand this pressure, oil leaking to the road surface was accepted, and the dipstick was screwed in. The hydrocarbon rich gas would then diffuse through the oil in the seals into the atmosphere. Subsequently, it became an emissions requirement as well as a functional necessity that the crankcase have a ventilation system. This must maintain the crankcase at slightly less than atmospheric pressure and recycle the blow-by gas back into the engine intake. However, due to the constant circulation of the oil within the engine, along with the high speed movement of the crankshaft, an oil mist is also passed through the PCV system and into the intake. The oil is then either burned during combustion, or settles along the intake tract, causing a gradual build-up of residue inside the inlet path. For this reason many engine tuners choose to replace the PCV system with an oil catch can and breather filter which vents the blow-by gases directly to atmosphere and retains the oil in a small tank (or returns it to the sump), although this technically fails to meet most engine emission legislation. Best Regards,Marcel Brataphone : 021 93501137 / 0838 960 18796ym : marcel_brtBBM : 214dec1ehttp://www.pancajulangjaya.comSent from my BlackBerry® smartphonePowered by PJM From: "Adi Satrio" <[email protected]> Date: Fri, 9 Apr 2010 10:46:39 +0700 To: <[email protected]> Subject: Re: [baleno] Oot : Oil Catch Tank made in Cianjur by Twin Garage AFAIK, soal OCT yang menyaring seluruh oli yang nebeng uap dari blow by gas ini ada beberapa pihak yang pro dan kontra juga. Saya gak tau om Saftari ikutan milist ini ato gak, atau mungkin ikut tapi gak mantau. Tapi om Saft ini termasuk yang menganut pandangan bahwa oli yang nguap itu memang diperlukan untuk melumasi bagian-bagian tertentu. Menurut beliau, selain bisa membuat polusi, ternyata ada keuntungan lain dengan masuknya lagi uap oli itu ke intake yaitu untuk melumasi intake valve seat dan batang intake valve biar gak cepat aus. Sementara banyak pihak lain yang berpendapat bahwa tidak ada keuntungan teknis sama sekali dengan memasukkan uap oli itu ke intake, selain cuman bikin kotor ajah. Bisa cek http://www.filtercouncil.org/techdata/tsbs/94-2R1.pdf , http://en.wikipedia.org/wiki/PCV_valve Kalo saya mah, yang dari PCV-intake malah saya ambilin udara dingin dari luar pake filter kecil ajah. Yah itung2, kebersihan ruang bakar dan busi lebih terjaga. Nah buat Om Ajat, OCT made in Cianjur ini saringan dalemnya apa ya? Kira-kira yang tersaring tuh seluruh uap oli, ato yang ringan-ringan masih bisa lanjut jalan? cmiiw yak.. adi bci`449 ----- Original Message ----- From: ajat sudrajat Fungsi Oil Catch Tank (OCT) Apa fungsi OCT? Fungsi utama OCT adalah menangkap uap oli yang terhisap oleh saluran manipol masuk kedalam ruang bakar, sehingga udara yang dihisap oleh mesin didalam ruang bakar benar-benar bersih tidak tercampur oleh uap minyak oli mesin, sehingga dapat menekan polusi gas buang sekaligus menyempurnakan pembakaran di ruang bakar mesin. Menangkap Uap Oli Kenapa Uap Oli Harus Ditangkap ? Pada saat mesin mencapai suhu kerja sekitar 80-90 derajat celcius, ruang oli mesin mendapatkan tekanan dan panas yang tinggi, sehingga oli mesin menguap dan dihisap oleh saluran masuk melalui sebuah saluran PCV. Pada kondisi tertentu keadaan ini tidak ada masalah, namun dalam kurun waktu yang akan datang kondisi ini akan membuat saluran masuk bahan bakar menjadi cepat kotor, dan polusi gas buang yang dihasilkan pun relatif agak tinggi kadar CO2 karena ada zat uap oli yang ikut terbakar. * * * * * * * * * * * * * * * * * * * * * This communication contains information of International Flavors & Fragrances (IFF) and/or its affiliates that may be confidential, proprietary, copyrighted and/or legally privileged, and is intended only for the addressee. Any copying, dissemination or other use of this information by anyone other than the intended recipient is prohibited. If you have received this communication in error, please contact the sender and delete it from your system. * * * * * * * * * * This communication contains information of International Flavors & Fragrances (IFF) and/or its affiliates that may be confidential, proprietary, copyrighted and/or legally privileged, and is intended only for the addressee. Any copying, dissemination or other use of this information by anyone other than the intended recipient is prohibited. If you have received this communication in error, please contact the sender and delete it from your system.
<<image/gif>>
