Stop Start Technology
Discussion
I have wondered about this can somebody explains how it works (Techinically).
And what is the effect on the engine as motorists are lead to believe that when you start a car you use a petrol and also a lot of engine wear occurs when a car is started so is this technology really benificial?
And what is the effect on the engine as motorists are lead to believe that when you start a car you use a petrol and also a lot of engine wear occurs when a car is started so is this technology really benificial?
johnnybegood said:
I have wondered about this can somebody explains how it works (Techinically).
If the car is in neutral, handbrake on, no pedals pushed, and the battery is fully charged and the heater or aircon don't need the engine, then the engine shuts off. As soon as you press the clutch to engage a gear, the engine starts up.HellDiver said:
johnnybegood said:
I have wondered about this can somebody explains how it works (Techinically).
If the car is in neutral, handbrake on, no pedals pushed, and the battery is fully charged and the heater or aircon don't need the engine, then the engine shuts off. As soon as you press the clutch to engage a gear, the engine starts up.RizzoTheRat said:
Startup engine wear issues are presumbaly more of an issue on a cold engine, when the engine's nice and warm and everything's already coated in warm oil I guess it's less of a problem.
I believe the cars will only do 'start/start' when a number of conditions are met, which includes the following (probably)- Sufficient charge in the battery
- Engine up to temperature
- Sufficient fuel(?)
- Sufficient lenght of time since last shutoff.
They also have beefier batteries, alternators and starter motors to cope with the additional strain of starting and stopping. I'd like to think they would also run a modified oil pump system, so as to keep oil flowing prior to each restart.
HellDiver said:
johnnybegood said:
I have wondered about this can somebody explains how it works (Techinically).
If the car is in neutral, handbrake on, no pedals pushed, and the battery is fully charged and the heater or aircon don't need the engine, then the engine shuts off. As soon as you press the clutch to engage a gear, the engine starts up.SS7
My Fiat 500 has this and it seems pretty good.... as has been said, there are various caveats about when the system will and will not activate if, for example:
- The car is not part way up to temperature
- If there is high accessory load (wipers, lights, heater, etc)
- The battery is significantly discharged
Justayellowbadge said:
I've always considered stop and start technology to be a minimum requirement in a car.
subtle very subtle.i have always wondered about the wear on a turbo on one of these engines, i was always told to wait 10 - 15 seconds at idle when i stop in a turbo car to let it slow right down before it loses oil pressure.
is the oil now kept up to pressure by an electric pump or has turbo technology moved on loads?
It's nothing but a sales gimmick, the actual savings are minuscule. In fact long term you'll probably end up forking out more in repairs/parts.
Last week I saw someone in a Clio who was clearly trying to manually stop/start whilst sat in traffic , seemed to work ok at first, but being directly behind I could tell the battery was not liking this, several stops later the battery promptly died.... And the driver? Yes she actually looked surprised!
Last week I saw someone in a Clio who was clearly trying to manually stop/start whilst sat in traffic , seemed to work ok at first, but being directly behind I could tell the battery was not liking this, several stops later the battery promptly died.... And the driver? Yes she actually looked surprised!
Back in 1986 in I had a VW Polo Formel E (1300cc/B registration), and it had a switch on the dashboard, and when said switch was engaged the engine would cut out if you were:
1. Stationary for more than x seconds.
2. In Neutral.
Novelty back then, or can anyone give details of other cars with this OEM supplied bit of kit?
1. Stationary for more than x seconds.
2. In Neutral.
Novelty back then, or can anyone give details of other cars with this OEM supplied bit of kit?
If you read some manfacturer figures the average annual savings are minimal, like 5-10l of fuel per year. The only real benefit is in road tax savings due to the EU drive cycle emmissions which we all know are pony anyway.
Some of the tech is quite clever, like the Mazda system that fires one cylinder to restart, its does'nt use the starter motor. They all require a certain driving adjustment to make it work, like bieng in nuetral & off the pedals, which many drivers don't do anyway. The BMW systems often can't make their mind up, the logic system is all wrong on them!
I would'nt be buying a car based on it, though the road tax savings yes.
Some of the tech is quite clever, like the Mazda system that fires one cylinder to restart, its does'nt use the starter motor. They all require a certain driving adjustment to make it work, like bieng in nuetral & off the pedals, which many drivers don't do anyway. The BMW systems often can't make their mind up, the logic system is all wrong on them!
I would'nt be buying a car based on it, though the road tax savings yes.
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