Buses And Bovs

[someonestolecc]

So I was walking down George St at lunch today and a bus pulls up near me and PSSSSHT.

I was less than 1m than the bus... so 2 questions come to mind.

a. why dont they get defected? (and this is PURELY rhetorical so dont up shit about this)

b. why can't I sue them for hurting my ear?

... anyone wanna take my case on?

[Mr Italy!]

Its public transport... the government couldnt give two shits about peoples ears if its saving them money.

[Driver]

hmm

a bus that saves people money and is convenient or a stupid rice car with a wanky bov....

road trains are louder.

[sh@un]

So I was walking down George St at lunch today and a bus pulls up near me and PSSSSHT.

I was less than 1m than the bus... so 2 questions come to mind.

a. why dont they get defected? (and this is PURELY rhetorical so dont up shit about this)

b. why can't I sue them for hurting my ear?

... anyone wanna take my case on?

Its public transport... the government couldnt give two shits about peoples ears if its saving them money.

EXACTLY!!!

Why can't you have a fulsikhectic megaphone BOV in ur car if it uses MAP fueling?

Standard Cop response- " 'Cause it's noise pollution, sir."

WELL WHAT ABOUT THE FKN M#$%ERF#$%ER BUSES THEN???

[dezz]

harleys are loud...

[dangerous_daveo]

Two things, busses arent all that cheap, not here in Brisbane anyway. They ARE NOT enviro friendly. Burn them. I want to drive on the bus lane!

[sh@un]

harleys are loud...

Bikes have different dB regulations to passenger vehicles.

Buses do to, I guess

[PHATR32]

cause the governent owns the buses, and they are above the law.... just like cops.

[Freddy Kruger]

yeah there brakes are shocking! there sign all over the place telling trucks to not use their noisey brake in town. when the trucks back in at work jeez it loud! wonder if it covered by worksafe?

[R33TOM]

yeah that bov sound from buses can scare the shit outa you if your not expecting it, specially if your standing right next to it.

happen to me a few times, almost jumped out onto the road

[Bass Junky]

Sorry guys.

The big sounds aren't actually a BOV.

They are the pneumatic brakes venting excess pressure after an application.

[Beer Baron]

actually they are both. sometimes it's the brakes venting pressure but i have heard bus bovs that are farking loud too!

[CEF11E]

Can anyone tell me where to get one of these bus BOV's? and is there an adaptor to fit them to my laser turbo?

[2rismo]

Most busses are diesel - explain what diesel engine BOV you've heard?!?!

[dangerous_daveo]

Most busses are diesel - explain what diesel engine BOV you've heard?!?!

A lot of natural gas busses up here in Brisbane... Not sure if they would have them either but hey

[grigor]

Not a BOV, it's the air compressor unloading.

When the air sysyem pumps up to working pressure, about 120psi, the compressor unloads and freewheels. The noise is the air released from the pipework between the compressor and the unloader valve.

Air brake noise is the air released from the brake system when the brakes are released.

Engine brake noise ( Jacob's engine brake) is much much louder and not usually heard in cities for obvious reasons.

Proper diesels don't need BOV's as they have no throttle butterfly. Only toy stuff like the old Toyota diesels had a butterfly as a cheap way to get vacuum for the brakes.

[Bass Junky]

I thought the deisels still had something like a BOV because on the biggins trucks, Big rigs and stuff, you hear the high pitched "powwwwwww" sound between gears.

Not a whistle, not a hiss, a "powwwwww"

make sence?

[MK2]

Well, diesels, turbo diesels too have no throttle, its all controlled by the injectors and not a throttle plate, so seeing as backpressure is created by a pressure difference between the manifold and turbo outlet pipe when a throttle plate closes, they dont have to worry about a pressure wave going the wrong way down the tube and belting into the blades.

Considering even most of the little 4cylinder turbo diesels seem to run a minimum of 14-15psi and trucks run about 40+psi and they dont have a BOV it seems surplus to requirements.

Theres all kinds of pnuematic assistance on big trucks and buses for all kinds of shit, not sure which shit it is making the noise I'd have to ask my dad he used to work for International.

edit- and yes in noisy environments with trucks using compression brakes, buses and noisy fuggen bikes I hardly think some noob with a noisy BOV is hardly going to kill anyone from a ruptured eardrum.

Edited May 4, 2006 by MK2

[r33_racer]

It would all be pnuematic reliefs. Buses like trucks use air, as its inifinite in supply, so long as the compressor is filling the tanks, and there are no leaks or wankers constantly hitting the pikes for no reason.

The noise people talk about when they change gears cant really be anything, unless that certain truck has an air assisted clutch...but truckies with some ability dont use the clutch at all unless they are stopping, starting, engaging PTO and in some trucks like volvos engaging splitter for high range (not all trucks have to use the clutch for this). I work around trucks a fair bit, and i drive them around occassionally around and out of the yard. So yeh...who knows, might be some truck with mechanical issues and is making funny noises.

Edited May 4, 2006 by r33_racer

[Trust33]

What he said.