I’m never sure why people want to switch off stop/start, but what doesn’t seem to work - the button or stop/start itself?
Stop-start puts extra wear on the turbo and the engine components themselves as most wear occurs during starting - many owners have found that it makes no difference to fuel consumption in the real world.
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I’m never sure why people want to switch off stop/start, but what doesn’t seem to work - the button or stop/start itself?
Stop-start puts extra wear on the turbo and the engine components themselves as most wear occurs during starting - many owners have found that it makes no difference to fuel consumption in the real world.
No it doesn't make any difference to consumption imo, its also a pain if your in fast stop start traffic, ie traffic stops then restarts as engine cuts out, specially in town as I am, and usually gets to the point stop/start wont work as battery level drops until it recovers.
I now do not use it for that reason
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Most wear occurs when starting from cold. Stop/start won’t allow the engine to get cold.
It’s also not just a matter of noticeable (or otherwise) changes to fuel consumption, though if an engine isn’t running it can’t be using any fuel, but think instead of emissions. Why pump out potentially noxious gases when stationary if there’s no need to?
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but think instead of emissions. Why pump out potentially noxious gases when stationary if there’s no need to?
You forget there is a limit to how it works, if the system does too many s/s and can be for many reasons, it wont work, so unless you manually start stop it, it carries on running, so it has its limits, and I always turn mine off due to traffic speed....
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I find stop start annoying, so does everyone else I know who has it. Can't be any good for the starter , battery etc.
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You have got a new XC90 loan car while your old V70 is getting repaired and instead of enjoying this impressive machine, you are moaning about the stop/start?. Is it really that big an issue?.
As for the wear and tear, it is a loan car, so who cares?. Also not really sure why the turbo would be being unduly affected by the car starting up?.
BTW, on our Honda Jazz (auto), the stop/start only works in 'drive' with your foot on the brake. If is moved out of drive into neutral or park, it doesn't activate. Also, it requires a certain amount of pressure on the brake pedal to activate it, so with just enough pressure to hold the car stationary, it won't switch off.
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No moan there, just a question. Stop start is on my car so it is relevant to me for issues concerned with it. XC90 is a huge car but easy to drive with many impressive bits of technology. The parking camera is brilliant, the speedo and speed limit are displayed on the windscreen so no excuse for speeding. If you get too close to a vehicle in front it shows on the display too, Volvo have a very large safety gap. Mirrors flash orange in the blind spot when a car is in it, I'm going to have a night run to see how the corner lights show the road. It's a great chance to see if a higher car with modern lights makes night driving easier. I am enjoying the car but I always want to know what all the functions are and how to use them. I've been lucky with loan cars, ended up with an 'S' class last time and that was the best car I've ever driven. I'd love to be able to afford either one but SWMBO sees cars as just a tool unlike my daughter who while waiting for her Land Rover to be looked at tried to get me to buy a Jag.
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Stop/Start isn't about fuel consumption. It is about a load of cars sitting in stationary traffic, often in towns/cities, chucking a load of crap out of their exhausts in a concentrated place for no good reason.
If it stops that then it is a a good thing.
I agree some of the implementations can be a bit aggressive - and Volvo is one of the offenders in this respect - but on the whole it is a good thing for urban use where. let's face it, UK use means sitting stationary a lot. I believe it will shortly become impossible to turn off on new cars so it is coming so arguing about it something of a moot point.
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I believe it will shortly become impossible to turn off on new cars so it is coming so arguing about it something of a moot point.
Who's arguing, problem is if you cant switch it off or do away with traffic jams there will be a lot more breakdowns due to flat batteries or ss problems as there are times when it cannot cope
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Who's arguing, problem is if you cant switch it off or do away with traffic jams there will be a lot more breakdowns due to flat batteries or ss problems as there are times when it cannot cope
No there won't be as the car will turn the stop/start off itself before it can flatten the battery as they do now.
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I believe it will shortly become impossible to turn off on new cars so it is coming so arguing about it something of a moot point.
Who's arguing, problem is if you cant switch it off or do away with traffic jams there will be a lot more breakdowns due to flat batteries or ss problems as there are times when it cannot cope
Every car I've come across with stop start has some sort of battery monitoring and it won't activate if the voltage is too low. Loads of cars have it and the roads are not littered with broken down cars at traffic lights.
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I think stop start is great. It switches the engine off but leaves all other things running. No need to pump out pointless pollution not going anywhere. And as others have stated unless all the parameters are met it won't switch the engine off.
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Devil's advocate here. What about the additional load on the alternator to bring the battery back up to charge. The lack of efficiency in converting mechanical energy into electrical energy may over rule the advantage of switching off the engine. Unless you consider the pollution would be spread over a distance instead of whilst the vehicle's stationary.
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Well it's a pity they are not mandatory on taxis, minicabs and school-run tractors.
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"What about the additional load on the alternator to bring the battery back up to charge."
Not all stop-start systems work in the same way. The Mazda system uses a large capacitor to store electricity while the car is in stop mode. Restarting does not involve the starter (and therefore the battery), but relies on initiating combustion, the engine having shut down with the pistons in optimum position.
Clearly, the capacitor needs recharging after use, but the energy loss is minimal; there is no wear and tear on the battery or starter motor.
Finally, restarting is really quick - Mazda quotes 0.35 seconds. After depressing the clutch you just have enough time to select gear and you're away.
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"What about the additional load on the alternator to bring the battery back up to charge."
Not all stop-start systems work in the same way. The Mazda system uses a large capacitor to store electricity while the car is in stop mode. Restarting does not involve the starter (and therefore the battery), but relies on initiating combustion, the engine having shut down with the pistons in optimum position.
Clearly, the capacitor needs recharging after use, but the energy loss is minimal; there is no wear and tear on the battery or starter motor.
Finally, restarting is really quick - Mazda quotes 0.35 seconds. After depressing the clutch you just have enough time to select gear and you're away.
The Mazda system does use "combustion starting", but this is still combined with the starter motor (so the load on the battery is much less than would otherwise be the case).
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Mazda’s I-ELoop (capacitor) is only on, from memory, the higher output petrol engined Mazda6, but it is clever. I’ve had if charge from almost empty to full by stepping off the accelerator at the top of a downhill motorway slip road and it has been charged by the time I got to the roundabout. In essence, that’ll meet the car’s electrical needs for a short time, lessening the load on the alternator, and consequently the engine.
With Mazda moving to mild 24V hybrid (Mazda3 and CX-30), I’d suspect that all the range will adopt this technology.
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Mazda’s I-ELoop (capacitor) is only on, from memory, the higher output petrol engined Mazda6, but it is clever. I’ve had if charge from almost empty to full by stepping off the accelerator at the top of a downhill motorway slip road and it has been charged by the time I got to the roundabout. In essence, that’ll meet the car’s electrical needs for a short time, lessening the load on the alternator, and consequently the engine.
It's no wonder car drivers are not using their indicators, they are too busy dealing with all their other ancillary items as they go on their merry way. What ever happen to the bog standard car!
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