Proper Way of Using Engine Brake...

[pajero freak]

May tanong lang ako about engine-braking (i.e., dropping to lower gear to slow down). Meron bang long-term effects ito sa condition ng makina? Sabi kasi ng iba nakaka-strain daw ito sa piston rods and transmission parts mas maganda raw mag-coast to a stop na lang (use the brakes instead). Sabi naman ng iba walang epekto yon. Ano kaya ang totoo?

[OTEP]

Basta match mo ang revs sa speed. And do not exceed redline while engine braking.

Mas mabuting mag-engine brake kaysa mag-overheat ang preno at mahulog ka ng bundok. hehehe. O kaya mag-lock ang brakes while doing a tricky off-road descent. Sa 4L doble ang engine brake.

[afrasay]

may nagsabi it's better to use the brakes, it's cheaper and easier to replace than the clutch. ako 50/50 engine brake and brakes.

[OTEP]

Basta never free wheel while going downhill. Ok lang kung overgear basta in-gear ka.

[pajerokid]

Pajero freak: If youre talking about "menor" there's absolutely nothing wrong with it. If youre going full stop, kailangan siyempre mag preno. It seems to me that what youre describing is the emergency stopping procedure when the brakes fail.

May nagsabi sakin way before that its more economical if you engine brake(menor), rather than use the wheel brakes in highway driving. Not really sure but this is what i do.

[mbt]

highway driving? better use the brakes... yan naman yung purpose ng brakes hehe

[OTEP]

I guess what PK means is that, huwag mo agad depress ang clutch then leave everything to the wheel brakes..

[afrasay]

just don't strain the engine during engine braking. if you need to make emergency stop DON'T step on the clutch. it will just make you go faster.

[pajerokid]

Sorry guys medyo malabo nga yung last part ng post ko earlier. :D

Clarification lang. Engine braking is "Menor" right? (lifting your foot off the accelerator)

Anyway, This was what i meant....


Of course kung emergency braking or if you need to lose speed fast, preno kaagad. Alangan naman mag engine brake pa. hehehe :D

Kung anticipated slowdown or slight speed reduction, menor lang.

On the fuel economy aspect.... it has something to do with the engines' inertia/momentum.

Diba? The more you accelerate, the more fuel you consume.

If you brake too much and accelerate again, you have to downshift, meaning higher revs, more fuel.

If you engine brake (menor), you could still maintain the engine's
momentum (up to a certain point of course) so that you dont have to press on your right foot so much.

BTTT, if we refer to Pajero Freak's procedure (of dropping a gear and engine braking). I DONT recommend this. Like i said, parang emergency procedure lang ito to be used in emergencies. :D


Sorry nalito lang ako dun sa engine brake definition :D :D :D

[boybi]

when i'm descending like sa mga basement parking, naka 1st gear ako tapos hindi ko inaapakan ang accelerator. ok lang ba ito?

[pajerokid]

boybi... yup thats perfectly ok. the engine can handle it.

[boybi]

when i tried this with our trooper na A/T, put it to L, ang bilis bumaba i have to step on the brakes. yung sa patrol dahan dahan lang bumaba.

[pajerokid]

Dun sa RAV4(AT), wala, i just step on the brakes if the darn thing goes too fast, when going down steep grades.

[boybi]

ganun ba lahat ng mga A/T? akala ko mas ok mag engine brake ang mga A/T.

[Ungas]

Originally posted by boybi
ganun ba lahat ng mga A/T? akala ko mas ok mag engine brake ang mga A/T.

Not realy, yung bagong LC120 series na Prado kinabitan ng Toyota ng Hill Descent Control para automatic yung preno pag sobrang bilis pababa, iba pa rin ang manual trannys.

[ghosthunter]

downside of engine braking is wearing out the clutch faster than normal.

[NightRock]

It happened to me Proper Engine braking saves my life .. when the brakes fails last june.. Kala ko katapusan ko na or kung hindi man laging gastos.. swerte pa rin ako

[wiretap_md]

Originally posted by pajerokid
Sorry guys medyo malabo nga yung last part ng post ko earlier. :D

Clarification lang. Engine braking is "Menor" right? (lifting your foot off the accelerator)

Engine braking means downshifting to a gear lower, not merely removing your foot from the accelerator pedal. In effect, you use the revs of the lower gear to which you downshifted to help you slow down your vehicle.

I use engine braking all the time ever since I started driving. For example, lets say i'm travelling 60kph in 4th gear and i'm approaching a redlight on an intersection, i start pressing the brake using my right foot to lessen my speed and while maintaining my right foot on the brake, then I let the engine assist my braking by letting my left foot depress the clutch pedal then shift down to third gear. I do the same procedure till I reach second. This is engine braking for me :-)

[tomahawk]

on my ride (hilux with AT) i normally use 2 or L when going downhill and it works for me, bumabagal ang takbo ko, syempre may combination ng brakes din.

[Bubbles]

Sa AT kasi engine braking depends on your torque converters stall speed. once your revs go below stall speed, more or less parang free wheel ka na. thats why push starting an AT needs lots of speed.

Mas maganda engine brake cuz it acts like an ABS. pero tama din na engine braking wears out the clutch faster and brake pads are cheaper and easier to replace. Explanation nga sa book, todays brake systems are very resistant to brake fade and overheating so it is perectly fine to not use engine braking. Practice of engine braking began with the older cars which had no vacuum assist. Braking was a back breaking job so people opted to used engine braking to slow down.