Stop/Start Technology

[gemius]

Mottie got it right. My 2014 Ford Fiesta has it and it has worked perfectly for nearly 11 years. You can turn it off but it will reset the next time you start the car. In use you should be able to judge whether a stop is only for a few seconds, e g lights about to change to green, and just keep your foot on the clutch. The engine won't stop then. I did have a new battery last year, that's after 10 years of mainly local short distance running. I thought the cost of the new battery was very reasonable.
I'd like to take this opportunity to plug the Ford Fiesta. The best small family car ever produced. What on earth possessed them to stop making it.

 

[Stivino]

What on earth possessed them to stop making it.

Ecoboom engines, maybe?

 

[ReganAndCarter]

If you have any credible evidence that they're not lasting as long now, feel free to post it up...

And no, "wet belt" technology isn't necessary to satisfy the latest emissions requirements. Plenty of manufacturers seem to be able to do it without any kind of timing belt - wet or dry! I'm not sure you understand the difference between "emissions legislation" and "CO2 legislation"?

I didn't say wet belts are there to satisfy emissions requirements. I said that recent cars are a liability - often because they have to satisfy new emissions legislation. That's why I but the wet belt example in a different sentence.

 

[Avocet]

I didn't say wet belts are there to satisfy emissions requirements. I said that recent cars are a liability - often because they have to satisfy new emissions legislation. That's why I but the wet belt example in a different sentence.

What you said was:

They were. However recently, often to satisfy new emissions legislation, some of the latest cars seem to be a liability. Eg. wet belts and Ford Rangers with self destruct engines. Just two examples I can think of - there are others.

(my underlining).

 

[ReganAndCarter]

What you said was:


(my underlining).

You've misunderstood. Not for the first time. I said wet belts are examples of changes in car design that makes them liabilities. Not examples of changes in design to satisfy new emissions legislation. 'Often' to satisfy new emissions legislation doesn't mean always - and I didn't say always.

It's not my fault that you can't comprehend this and enjoy splitting non existant hairs to fill your day. Everyone else understood what I wrote.

I like the way that a pedant tries to tell me that what I wrote means something completely different. I fecking wrote it after all.

This is hard work!

 

[Avocet]

You've misunderstood. Not for the first time. I said wet belts are examples of changes in car design that makes them liabilities. Not examples of changes in design to satisfy new emissions legislation. 'Often' to satisfy new emissions legislation doesn't mean always - and I didn't say always.

It's not my fault that you can't comprehend this and enjoy splitting non existant hairs to fill your day. Everyone else understood what I wrote.

I like the way that a pedant tries to tell me that what I wrote means something completely different. I fecking wrote it after all.

This is hard work!

Give yourself a break from all that hard work and now that you're at the bottom of the hole, stop digging! I can't really be held responsible for your poor literacy, I'm afraid.

 

[ChrisNason]

My Volvo has a second battery for Stop/Start so the lights don't dim on restart (Audis?)
Many factors prevent its deployment including a heavy A/C interval.
But, best of all, if I'm expecting the traffic to move away I can slip the gear lever to 'Sport'. On the other hand, in slow traffic, a heavy application of the brake pedal forces an engine stop.

 

[Londoner2]

Mottie got it right. My 2014 Ford Fiesta has it and it has worked perfectly for nearly 11 years. You can turn it off but it will reset the next time you start the car. In use you should be able to judge whether a stop is only for a few seconds, e g lights about to change to green, and just keep your foot on the clutch. The engine won't stop then. I did have a new battery last year, that's after 10 years of mainly local short distance running. I thought the cost of the new battery was very reasonable.
I'd like to take this opportunity to plug the Ford Fiesta. The best small family car ever produced. What on earth possessed them to stop making it.

10 years on a single stop strat battery is very good. I had 7 years out of a normal lead battery.

 

[Avocet]

The algorithm behind when they stop and start, is really quite complicated. I can't remember all the parameters, but it won't stop-start when:

The engine is cold;
The ambient temperature is below 5 degrees C;
It's in the middle of a DPF regeneration;
The battery level is too low:
It has done too many stop-start cycles in the previous "x" minutes;
There is demand from the aircon compressor and the evaporator temperature is above a certain value;
The driver's door is open;
The driver's seat belt is off;
The oil temperature is too high...

(There are probably others)!

 

[RandomGrinch]

There are probably others

If the engine temperature is high and the cooling fan is running for a significant time, or if the car is halted on a steep incline are some other factors.

 

[Avocet]

If the engine temperature is high and the cooling fan is running for a significant time, or if the car is halted on a steep incline are some other factors.

The steep incline one is intriguing?

 

[dishman]

The algorithm behind when they stop and start, is really quite complicated. I can't remember all the parameters, but it won't stop-start when:

The engine is cold;
The ambient temperature is below 5 degrees C;
It's in the middle of a DPF regeneration;
The battery level is too low:
It has done too many stop-start cycles in the previous "x" minutes;
There is demand from the aircon compressor and the evaporator temperature is above a certain value;
The driver's door is open;
The driver's seat belt is off;
The oil temperature is too high...

(There are probably others)!

Steering wheel has to be straight.

 

[Mottie]

If you wiggle the steering wheel when the engine is stopped, it will start the engine.

 

[Avocet]

Steering wheel has to be straight.

That's an odd one? Do you know why? As Mottie says, wiggling the steering on Mrs. Avocet's car will start the engine again, as it senses demand for power assistance, but I honestly can't remember if it has ever stopped its engine when there's some lock on? (It's a VAG car). We've had it a good 5 years now, so I'm struggling to believe that we'll never have had the engine stop with a bit of lock on?

 

[dishman]

That's an odd one? Do you know why? As Mottie says, wiggling the steering on Mrs. Avocet's car will start the engine again, as it senses demand for power assistance, but I honestly can't remember if it has ever stopped its engine when there's some lock on? (It's a VAG car). We've had it a good 5 years now, so I'm struggling to believe that we'll never have had the engine stop with a bit of lock on?

I remember reading it somewhere when I went through a phase of being bothered about it not working.

If it is the case, I imagine that it pertains to a certain degree of lock rather than just being slightly off centre.

I would assume, and this is only just a guess, that it's just a safety measure to stop someone from forgetting they have, for an extreme example, one full turn on their wheel while sitting with the engine off, then setting off quickly from stop/start and the car suddenly veering unexpectedly.

Maybe test with yours to see. I would test in mine....if it worked.