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02-28-2011, 07:43 AM | #1 |
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Do you manually switching off the engine when waiting in the traffic light?
I wonder how many of you manually switching off the engine when waiting in the traffic light?
My X1 has auto transmission so it doesn’t have the automatic engine stop/start feature. Most of my trips are in Sydney city and the traffic is slow. I switch off the engine on a traffic light if I know I have to wait for a while; I found that does keep the fuel consummation low. I wondering anyone of you are doing the same thing? Thanks Simon |
02-28-2011, 11:34 AM | #3 |
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Ditto.
Traffic lights in normal traffic flow sounds a bit pushing the concept though, but since a S&S manual would switch off, I suppose it does make sense from an emission standpoint. Now to save a few cents worth of gas ? I dunno... Driving a Beamer and cutting your engine at every traffic light to save a dollar by the end of the month sounds a bit tacky...
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02-28-2011, 11:59 AM | #4 |
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Hi Simon
If you've not the stop and start system, is it not a problem for the car to manually switch off the engine ?
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02-28-2011, 12:33 PM | #5 |
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That is the question Simon is asking.
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02-28-2011, 12:55 PM | #6 |
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The question of Simon was how many person switch off the engine manually no?
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02-28-2011, 02:19 PM | #7 | |
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For those who do manually switch the engine off, please note however that: - you lose power steering and especially power braking when the engine is off (important e.g. when you're staying in a traffic jam on a slope); - the stopped engine may cool, or the battery may be used by the onboard electrical equipments beyond a point where the fuel economy is worthwile. The automatic system controls all these things and re-starts the engine when necessary. |
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02-28-2011, 02:54 PM | #8 | |
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02-28-2011, 03:54 PM | #9 | |
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The S&S will stop the engine regarless of the stopping time, maintaining several features such as air con or heat. It can't be bad to switch off an automatic (or a manual without S&S for that matter) when you know for sure you'll be standing for several minutes, but it doesn't make sense at every traffic light for a few seconds. It also means you need to revert to N or P to crank the engine again, which defeats somewhat the purpose of an "automatic" transmission !
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02-28-2011, 07:15 PM | #10 |
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The other thing is unless the engine is suitably heated your actually using more fuel as the engine is not at it's peak operating temp.
One of the conditions for s&s is engine temp |
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03-01-2011, 03:05 AM | #11 |
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Exactly. The S&S system stops the engine only when the conditions are such that it makes sense to do it.
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03-08-2011, 04:17 PM | #12 |
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You need to wait about 2 secs after you press the ... clutch pedal? ... for the car to kick back in. After the S&S system shuts the engine down. I found it a bit weird since I can't _immidiately_ continue the driving, but it's still an overall pleasing feature x) just need to get used for the slight delay.
It took the car abouts 5 minutes of driving to start using S&S as the needed temp was reached. It was abouts 10C outside. |
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03-08-2011, 05:15 PM | #13 |
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By the time you have the gear selected the engine should be ready to move off. Takes a bit of getting used to but I am used to it now and find no delay between engine re- starting and moving off
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03-09-2011, 02:55 AM | #14 | |
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Basically you depress the clutch wich cranks the engine while simultaneously engaging first gear. It takes slightly longer than I could do it on a non S&S if I had to move in a hurry, but most times it's not significantly slower either, and I'm still the first one to move when the light turns green.
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03-09-2011, 03:27 AM | #15 | |
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Stronger battery Stonger starter motor Regenerative braking (charges battery) Also the Mini's system is quite fast. On my auto X1 I would have to push the start button, then put it in D. Too slow for a fast get away. I always switch it off on the Mini anyway as I don't like it but I can say in all honesty that I cannot notice any measurable difference in consumption.
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03-09-2011, 04:42 AM | #16 | |
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03-09-2011, 04:57 AM | #18 |
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Maybe he just doesn't like to have to refill often. Takes some time to do it that I would understand. Ecology? Nah since it's xDrive. x) but yeah saving on gass on a xDrive 20d Bimmer... Hard to chew. Surely unreasonable worrying. Or is it?
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03-09-2011, 07:00 AM | #19 | |
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PS: And probably one of the most efficient production 4x4's on the planet!!
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03-09-2011, 07:26 AM | #20 | |
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Yeah but still there is no explanation for turning the engine off on each traffic stop... If it was a cheap car... Last edited by Kres7787; 03-09-2011 at 07:43 AM.. |
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03-09-2011, 07:30 AM | #21 |
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I'm not a big fan of this because I feel this adds strain to the car, both mechanically and electrically. Like in all machines and electronics, start-stop/power cycles are the most damaging.
Last edited by Douggie; 03-09-2011 at 07:55 AM.. |
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03-09-2011, 08:14 AM | #22 |
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It does. But lower emissions is the name of the game now.
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