Auto Stop-Start: Enable/Disable?

[SauRoNZA]

Well Sauron, unlike a turbo, we the motorists are offered the decision of deactivating the SS system

At the very least that raises the question over whether or not to push that button.

As for the rest of it, more experience and investigation will be needed.

I think at the end of the day it will come down to nothing but a paper value.

Like the difference between 0-100 in 4.1 seconds or 4.2 seconds.

Ultimately inconsequential in the real world.

Just look at hybrid cars that have had this technology for years switching from the electric at low speed to petrol at higher speed. They’ve been pretty damn reliable so far.

But ultimately much like ABS and Traction Control and all these other things we have in our cars but don’t necessarily want or need it’s entirely up to you what you want to do with it.

 

[FiestaST]

SS button location on the all new ~R1.2 bar RS5

 

[Foxhound5366]

SS button location on the all new ~R1.2 bar RS5

Lol, you having fun with this, aren't you No SS in FiestaST, is there?

 

[FiestaST]

Lol, you having fun with this, aren't you No SS in FiestaST, is there?

Let me have my fun man + your thread gets a bump. Everyone wins

 

[Foxhound5366]

Let me have my fun man + your thread gets a bump. Everyone wins

It's ok. I've already called my car's SS button "My leetle friend."

 

[f2wohf]

SS button location on the all new ~R1.2 bar RS5

You do know it is the same button than every other Audi I've seen ?

 

[saturnz]

on a turbo car this could be a problem especially if the turbo is hot and the car just switches off, with nothing to pump the oil you can expect damage to occur

 

[Drifter]

Well Sauron, unlike a turbo, we the motorists are offered the decision of deactivating the SS system

At the very least that raises the question over whether or not to push that button.

As for the rest of it, more experience and investigation will be needed.

Not if you drive a Mazda, you dont.

 

[FiestaST]

/And that's why we bump relevant threads

 

[Archer]

on a turbo car this could be a problem especially if the turbo is hot and the car just switches off, with nothing to pump the oil you can expect damage to occur

I don't even...

 

[saturnz]

I don't even...

*yawn*

yeah because you got nothing

You’re going to have hot spots where the engine components, and especially the turbocharger, are still significantly hotter than your engine oil temperature. If you shut off the engine, the oil no longer flows, and thus pockets of the oil are going to be heated up to very high temperatures. These high temperatures break down the oil, and also burn up and evaporate the light end of the oil, leaving behind a heavier oil that won’t have ideal flow characteristics. This reduces your engine oil life, and also means you might have less protection at start-up.

[video=youtube;dyEYaN6Y_FM]https://www.youtube.com/watch?v=dyEYaN6Y_FM[/video]

 

[Archer]

*yawn*

yeah because you got nothing

I fully understand turbos need to be cooled, I also know that vehicles with stop/start systems keep cooling them if required once the engine is off through various methods. One would imagine a so called car fundi like yourself would know this

 

[saturnz]

I fully understand turbos need to be cooled, I also know that vehicles with stop/start systems keep cooling them if required once the engine is off through various methods. One would imagine a so called car fundi like yourself would know this

various methods, could you be more vague...

notice I post facts, whereas you, continue to be vague

 

[SauRoNZA]

various methods, could you be more vague...

notice I post facts, whereas you, continue to be vague

None of your facts relate to cars with auto start/stop systems that manage the facts you are referring to.

They purely apply to manual intervention...which is not applicable to an automatic system.

It should only ever be harder on a starter...which is precisely why auto start/stop cars have a different starter specific to the function.

Auto stop doesn't completely kill the car as you would by turning the key to off. It's more like a "standby" mode with many functions still operating like water pumps and oil pumps etc depending on the particular car and the system in use.

 

[Arthur]

I need to swot up on how to disable this on the new Tiguan. There's a button to the left of the gear lever, but it defaults to On every time the vehicle starts. I want auto-stop/start switched off.

 

[saturnz]

None of your facts relate to cars with auto start/stop systems that manage the facts you are referring to.

They purely apply to manual intervention...which is not applicable to an automatic system.

uhmmm, LOL?

Auto stop doesn't completely kill the car as you would by turning the key to off. It's more like a "standby" mode with many functions still operating like water pumps and oil pumps etc depending on the particular car and the system in use.

reference, especially with respect to (performance) turbo vehicles

 

[Foxhound5366]

http://www.caranddriver.com/features/engine-stop-start-systems-explained-tech-dept

When the car comes to a stop, the engine computer cuts spark and fuel. When the driver lifts his foot off the brake, or engages the clutch, the engine fires back up.

Of course, the starter has to be stout enough to withstand the dramatically increased on-off cycling. A heartier battery is also required to *satisfy the car’s entire electrical needs with its engine off. Otherwise, stop-start is about as easy a fuel-saving technology as driving downhill.

Maybe that includes the oil pumps for the turbocharger?

 

[Archer]

Maybe that includes the oil pumps for the turbocharger?

Correct, you'll also typically find that if the turbo is particularly hot (like after extended highway driving) the stop/start system will not activate. There are of course numerous other conditions that must be met as well

 

[pinball wizard]

I have heard stories of ring gear failures at least one of which was in a BMW like foxhound's and likely attributed to too many start cycles.

 

[koogs]

My wife has a 2015 Nissan Qashqai with the 1.6 turbodiesel engine. The SS is annoying especially with a diesel engine which is quite rowdy on start up. There is a button to switch off the SS whilst driving but this defaults back once you start a new journey.

Last month the battery in this 18 month old vehicle died and there was plenty of warning lights on the dash. Vehicle went back to Nissan who replaced the battery with a bigger unit. Apparently the battery in the models sold in SA is too small for vehicles with SS but Nissan keeps quiet about this and waits for customers to bring their vehicles in before they replace the batteries instead of advising the affected owners.