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Stop-Start Systems


Ake109
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  On 2/20/2016 at 3:39 PM, Fuelsaver said:

i'm confused with this system. for many years we were "taught" wear n tear n fc during start up is the worst. so how can start-stop be beneficial other than cutting emissions due to no exhaust generated during "stop" mode.

 

whatever it is, i'll surely be turning off (if possible, disable it permanently) to delay replacing starter n batt. not for layman like me to discern if emission during idling or replacing starter n batt more harmful to env.

 

yeah, I turn mine off at the start of every journey.

 

press one button only, learn and do I can ... [:p]

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Turbocharged

I feel for my Mazda 2, the rpm at idling is more stable, when start stop doesn't kick in, when the iStop is activated. If i off it, the idling rpm moves up and down 3 bars.

  On 2/21/2016 at 1:22 AM, Blueray said:

yeah, I turn mine off at the start of every journey.

 

press one button only, learn and do I can ... [:p]

 

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Actually,most Car Mfg made this system is to get lower CO2 level,other than that,just save 5% petrol,for example Mazda 6,2.5 only give out 161g of CO2,while the 2.5 Toyota Camry,Honda Accord 2.4 & Nissan Teana[all w/o start/stop],give out 185g of CO2...

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  On 2/16/2016 at 9:39 AM, Nick2342 said:

Thanks! Nope no car cam. But if faulty no alternator fault light on dashboard ah.. can it be safely ruled out?

 

Think should be the battery problem but will try and see before servicing if OBD can reset the error.

 

But so fast batt drained is scary. Can't imagine the wear on the starter motor as well. Does it affect the motor as bad as the battery?

To my understanding, not all cars with Start/Stop feature are using the same method to restart the engine upon moving off, at least not for Mazda iStop system.

 

Any cars with this Start/Stop system are not using the normal battery, and usually more expensive type.

 

Manufacturers have also taken into consideration that due to frequent restarting of engines and this would put additional strain to the starter motor, battery, alternator.

Thus a bigger starter motor and higher amp alternator are built for cars with this feature.

 

This would also probably mean that these parts in future would be more costly to replace too.

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  On 2/21/2016 at 1:35 PM, Mr_biscuit said:

To my understanding, not all cars with Start/Stop feature are using the same method to restart the engine upon moving off, at least not for Mazda iStop system.

 

Any cars with this Start/Stop system are not using the normal battery, and usually more expensive type.

 

Manufacturers have also taken into consideration that due to frequent restarting of engines and this would put additional strain to the starter motor, battery, alternator.

Thus a bigger starter motor and higher amp alternator are built for cars with this feature.

 

This would also probably mean that these parts in future would be more costly to replace too.

I think Mazda can ignite the engine to start without using the starter.
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  On 2/20/2016 at 3:39 PM, Fuelsaver said:

i'm confused with this system. for many years we were "taught" wear n tear n fc during start up is the worst. so how can start-stop be beneficial other than cutting emissions due to no exhaust generated during "stop" mode.

 

whatever it is, i'll surely be turning off (if possible, disable it permanently) to delay replacing starter n batt. not for layman like me to discern if emission during idling or replacing starter n batt more harmful to env.

 

Most cars with start/stop system are on direct injection fuel system, this system is not very fuel efficient or have clean emission during engine idling speeds. The air/fuel mixture cannot complete the burn in the combustion cycle and are released into the exhaust port thus unburned fuel and not so clean exhaust emission. Car makers adopt the start/stop system to counter this emission and fuel efficiency issue...although they like to market that direct fuel injection system produces more power and is more fuel efficient. They only tell you things that you like to hear.

 

Toyota cars with direct injection system uses MPI(multi-point injection) during idling and switch to direct injection when there's load.

 

By switching off the start/stop system defeats the purpose of better fuel efficiency and clean emissions. The battery, starter and alternator are specially built for this system so why worry? If I'm not wrong the flywheel keeps spinning even when the engine is stopped so it will be made easier for the engine to restart.

 

There's cause for worry only when users are in doubt and they do not understand how it works. That's is when they try to look back at what they know about the conventional way of how things work.

 

So users got to understand when they switch off this system and their FC increased dun kpkb the claimed FC is nowhere near what you are getting. Do take note that when you do more city driving and you have chose to off the system the fuel efficiency will definitely go for the worse.

Edited by Watwheels
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Don't know I my observation is correct, although start stop systems are on both petrol and diesel engines, some manufacturer seem to prefer having it on their diesel options.

 

Is it due to the inherent design differences of diesel vs petrol?

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  On 2/21/2016 at 1:35 PM, Mr_biscuit said:

To my understanding, not all cars with Start/Stop feature are using the same method to restart the engine upon moving off, at least not for Mazda iStop system.

 

Any cars with this Start/Stop system are not using the normal battery, and usually more expensive type.

 

Manufacturers have also taken into consideration that due to frequent restarting of engines and this would put additional strain to the starter motor, battery, alternator.

Thus a bigger starter motor and higher amp alternator are built for cars with this feature.

 

This would also probably mean that these parts in future would be more costly to replace too.

Hmm how else would they start/stop? By stopping/starting fuel injection during start/stop or through normal cranking ie starter motor?

 

But isnt fuel injection method cylinder deactivation in that sense?

 

Start stop was avalabile this morning when i checked, seems the alternator is working and charged the battery. Thanks to everyone for thier advice!

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  On 2/21/2016 at 2:31 PM, Watwheels said:

Most cars with start/stop system are on direct injection fuel system, this system is not very fuel efficient or have clean emission during engine idling speeds. The air/fuel mixture cannot complete the burn in the combustion cycle and are released into the exhaust port thus unburned fuel and not so clean exhaust emission. Car makers adopt the start/stop system to counter this emission and fuel efficiency issue...although they like to market that direct fuel injection system produces more power and is more fuel efficient. They only tell you things that you like to hear.

 

Toyota cars with direct injection system uses MPI(multi-point injection) during idling and switch to direct injection when there's load.

 

By switching off the start/stop system defeats the purpose of better fuel efficiency and clean emissions. The battery, starter and alternator are specially built for this system so why worry? If I'm not wrong the flywheel keeps spinning even when the engine is stopped so it will be made easier for the engine to restart.

 

There's cause for worry only when users are in doubt and they do not understand how it works. That's is when they try to look back at what they know about the conventional way of how things work.

 

So users got to understand when they switch off this system and their FC increased dun kpkb the claimed FC is nowhere near what you are getting. Do take note that when you do more city driving and you have chose to off the system the fuel efficiency will definitely go for the worse.

Hi, by not completing the burn in, you mean incomplete combustion in that sense? But doesnt DI engines claim to have more complete combustion compared to multi point or single port injection as it has lower combustion temps at light loads and thus lower emissions like idling or no acceleration scenarios? Or is it more on the A/F ratio part? Iirc A/F is normally rich when starting up so as to warm the engine up quickly. Since the catalytic convertor hasnt warmed up at that point as well wouldnt that lead to higher emissions in that sense?

 

Thanks for taking the time to explain though, learned alot on start/stop.

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  On 2/21/2016 at 2:31 PM, Watwheels said:

Most cars with start/stop system are on direct injection fuel system, this system is not very fuel efficient or have clean emission during engine idling speeds. The air/fuel mixture cannot complete the burn in the combustion cycle and are released into the exhaust port thus unburned fuel and not so clean exhaust emission. Car makers adopt the start/stop system to counter this emission and fuel efficiency issue...although they like to market that direct fuel injection system produces more power and is more fuel efficient. They only tell you things that you like to hear.

 

Toyota cars with direct injection system uses MPI(multi-point injection) during idling and switch to direct injection when there's load.

 

By switching off the start/stop system defeats the purpose of better fuel efficiency and clean emissions. The battery, starter and alternator are specially built for this system so why worry? If I'm not wrong the flywheel keeps spinning even when the engine is stopped so it will be made easier for the engine to restart.

 

There's cause for worry only when users are in doubt and they do not understand how it works. That's is when they try to look back at what they know about the conventional way of how things work.

 

So users got to understand when they switch off this system and their FC increased dun kpkb the claimed FC is nowhere near what you are getting. Do take note that when you do more city driving and you have chose to off the system the fuel efficiency will definitely go for the worse.

 

I wanna praise you but cannot. :(

 

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Supersonic

GS Yuasa (Made in Japan) Stop/Start battery from Estima SKJ plate, ~Nov 2012

Lasted 3 yr +, not bad.

 

161m6ww.jpg

Edited by Kb27
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  On 3/15/2016 at 10:14 AM, Kb27 said:

GS Yuasa (Made in Japan) Stop/Start battery from Estima SKJ plate, ~Nov 2012

Lasted 3 yr +, not bad.

 

 

 

mine lasted 1 year 2 mths using the start stop function most of the time. not sure how long it will last if i off the start stop function.

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  On 3/15/2016 at 2:16 PM, Dilemma said:

mine lasted 1 year 2 mths using the start stop function most of the time. not sure how long it will last if i off the start stop function.

Your car is Golf 7.?My Mazda 6 can lasts 1 Year 8 months.

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  On 3/15/2016 at 2:22 PM, ER-3682 said:

Your car is Golf 7.?My Mazda 6 can lasts 1 Year 8 months.

 

yea golf mk7. good thing is the battery is covered under warranty hence i will still make use of the start stop feature.

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  On 3/15/2016 at 2:45 PM, Hoonigan said:

With SS system, we just open up a new fear smong drivers..

 

Will it start the engine again on the next stop engine.. LOL

If the battery is not strong enough,it will not 'stop' the engine,usually a warning message will be show.

  On 3/15/2016 at 2:34 PM, Dilemma said:

yea golf mk7. good thing is the battery is covered under warranty hence i will still make use of the start stop feature.

Just sidekick a bit,how you find your Golf.?Any problem so far.?Like DSG.?

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