diesel engines: mas hindi tumitirik?

[badkuk]

i read somewhere that diesel engines are better suited for flood-prone streets -- something about the engine being sealed, and thus no water damage(i.e. no tirik).

pwede po paki explain further?

[explorer]

diesel engines are working under the 'compression-ignition' principle....meaning walang spark plugs and not dependent from battery to create an ignition inside the cylinder. it's the compression ratio (higher, usually 2x than 'injection-ignition' or gasoline engine) and the special characteristic of diesel fuel that makes a 'compression-ignition' process possible....ok, let me explain further....yung gasoline engine ang nag papaapoy ng fuel/air mixture ay yung power na nag-ignite sa spark plug na galing sa battery...sa diesel engine...walang battery power na ini-inject or walang spark plug na ginagamit para mag-ignite yung fuel/air mixture....sa diesel engine, ang air/fuel mixture ay kino-compress sa mas mataas na pressure at pag naabot yung flash point temperature ng diesel fuel...yung heat created by high compression will then automatically spark the ignition inside the cylinder...so yung ignition ng diesel ay independent sa battery or electrical power (coming from outside)...it's the condition inside the cylinder that causes the diesel fuel/air mixture to ignite...kaya nga pwedeng paandarin ang diesl sa tulak o hatak lang kasi once the fuel/air mixture is compressed inside the cylinder...pwede na mag ignite at mag start ng engine....yun din ang reason kung bakit sinasabi nila na ang engine pag uminit lalong lumalakas...tama yun pero to a certain temperature limit lang...pag sobrang init ng diesel engine di rin maganda at sasabog na....with this principle...ang diesel engine ang pinaka ideal sa flooded areas kasi nga yung ignition ay independent sa battery.

[rsnald]

nadiscuss yan sa "How stuff works" =)

http://auto.howstuffworks.com/question429.htm

basically... engines has less electricals sa fuel ignition/combustion system... gas engines has more which could be shortcircuited by water... pero pag pinasok ang diesel engine ng tubig... patay :freak: goodbye diesel engine ka na... gas engines buhay pa... basta maisuka nya lang yung tubig.

[Jeepcruizerph]

huhu bro yung XTO ko, pag mataas na flood...na tatamaan alternator...nag rered lahat ng indicators sa panel...and pag ahon nawawala na

nangyayari din ba sa inyo yon?

[theveed]

Jeepcruizerph: Hehe, given na yun.. siguro medyo mababa ang alternator mo, try mo sprayan ng WD40 yung LABAS ng connector mo to shield it from moisture somewhat. Pagnalubog ang mga connectors, dapat linisan mo ng contact cleaner para di mag corrode.

[ECG]

buti di nasisira yung IC..

[badkuk]

e ung glow plugs, nasa *labas* ng engine/combustion chambers? But granted that you reach the right temp for combustion to occur, kahit masira ung somehow e ok ka na?

[Jeepcruizerph]

Originally posted by theveed
Jeepcruizerph: Hehe, given na yun.. siguro medyo mababa ang alternator mo, try mo sprayan ng WD40 yung LABAS ng connector mo to shield it from moisture somewhat. Pagnalubog ang mga connectors, dapat linisan mo ng contact cleaner para di mag corrode.

Thank you thank you very much theveed

nag iisip na nga ako ng protective plate na pang cover...

i will do that later pag uwi ko sa work

thanks again

[Ungas]

Glow plugs are only used when engine is pre-warmed before starting the engine. Pag mainit na ang makina bali wala na ito.

[Jeepcruizerph]

theveed thank you very much nagamit ko yung WD40 pagkauwi ko nilagyan ko yung mga connectors...ayun pagdating ng gabi bumaha sa amin and wala yung red lights hehe

tnx tnx again

The Story...(tornado*pampanga)

[afrasay]

Originally posted by Jeepcruizerph
theveed thank you very much nagamit ko yung WD40 pagkauwi ko nilagyan ko yung mga connectors...ayun pagdating ng gabi bumaha sa amin and wala yung red lights hehe

tnx tnx again

The Story...(tornado*pampanga)

another factor could be the sliding belts.

[promdiboy]

ang glowplugs ba gumagana lang sa initial start? or hinihintay pa niya uminit yung engine? kung sira ang temp gauge mo will this cause your glowplugs to be always ON?.

[rsnald]

Originally posted by Jeepcruizerph
huhu bro yung XTO ko, pag mataas na flood...na tatamaan alternator...nag rered lahat ng indicators sa panel...and pag ahon nawawala na

nangyayari din ba sa inyo yon?

pre... din lang yan nangyari sa kin when I cross heavily flooded streets, minsan, bigla nawalan ng reading yun RPM meter ko. turns out, parang na-short sya. nabasa kasi alternator ko the previous night. pero after a while, ok na ulit.

tama si theveed, WD40 lang katapat nyan. parang mahirap yata i-insulate yung alternator natin; nasa ilalim kasi e. anyways, ingat na lang pagtawid ng baha.

[boknoyxtrm2001]

rsnakl,

Naalala ko yan storya na yan./.., heheheheheh

[vinj]

What usually causes stalling sa floods:
- water ingestion on the intake side
- electricals get wet/shorted

Diesels generally have less electricals over gas engines AFAIK so the best is to just be aware of how your engine layout is on electricals and air intake so you can always gauge the floods.

[Boy2]

Originally posted by PROMDIBOY
ang glowplugs ba gumagana lang sa initial start? or hinihintay pa niya uminit yung engine? kung sira ang temp gauge mo will this cause your glowplugs to be always ON?.

Glow plugs help engines to start in low temperatures. It glows continuously until air temperature in the engine cylinders is high enough to ensure self-ignition of the fuel sprayed into the combustion chamber.

Probably if you have broken temp gauges it'll continue its glowing. Or siguro meron yung thermostat para mag auto-off.. I'm not really that knowledgeable about diesels...

Peace... ;)

[jim]

Glow plugs are "only used when starting a cold engine initially". After that wala nang ginagawa ang glow plugs unless you stop the engine and restart it but all depends on how good the compression state of the engine kasi if you have good compression then no need for glow plugs as next engine startup.............

Sir PROMDIBOY yung temp gauge kahit po masira will not cause the glow plugs to be continously ON. May tinatawag po tayong Glow Plug relay that triggers the Glow Plugs to be on when needed.

[Jeepcruizerph]

lahat ba ng electrical system (wire connections) na nakalitaw sa engine bay pwede lagyan ng WD40?

syempre hindi po yung mga fuse box...lols

[theveed]

Jeepcruizerph: Glad it worked out

[promdiboy]

thanks sa info about the glowplugs.