Nissan Car Lounge - Almera, Juke, Latio, Qashqai, Sylphy, Teana Owners > Latio
Fuel Cutoff?
FamilyManz:
--- Quote from: SoL on July 17, 2008, 09:17:04 AM ---Apply brake will cut off?
I always thought lifting foot off accelerator will cut off liao. :confused1:
Thank you thank you for your help bros!
--- End quote ---
even when u lift off from accelerater.... ur car can still move rite? :smile:
SoL:
But car is already moving ma. I mean when u lift off when car is already moving, not when starting from a stop. :confused1:
darrylker:
--- Quote from: SoL on July 16, 2008, 03:05:00 PM ---Hello, I'm new here, currently driving a 1.5 4AT sedan.
I heard that when going downhill, its better to release the accelerator while in D gear rather than to go down in N, because the engine will cut off the fuel when u release accelerator while in gear.
Is it true? Hoping to save more petrol here. ;D
--- End quote ---
Bro, like the other lation's advices, not wise to do it...Firstly, I dont think you'll save much petrol by doing so...worse still you might lose control in times of E-brake...do you previously drive a manuel car? For my previous ride, sometimes i use to turn to 'free gear' at high speed to experiment if can save petrol...but free-wheeling rather dangerous, no engine brake....
From various feedback, our ride is FC rather efficient, think should focus more on your ride foot during acceleration, i.e. dont rev too much, ....my 2-cents worth.... ;D
aerosignal:
Actually somebody got it right in one of the topics before but I too lazy to go find it. Basically, when you don't step on accelerator when car is moving, the fuel injectors cut off (no fuel at all). When the vehicle slow down to a preset speed 20 kph or something like that the fuel injectors turn back on again to keep the engine running.
This was something that confused me initially when I was toying with the scangauge when I was in US. There are times when the display goes 9999 mpg (basically infinite). I thought it was a update error. Later I found out it was because the fuel is cut off during deceleration causin a divide by 0 reading.
In short, when moving with enough speed, engine braking keeps engine moving (no fuel). When car is so slow that engine going to stall, fuel injection turn on again.
Keeping the above in mind, idling at the traffic light burns gas for nothing (0 mpg). Stepping on brake to slow vehicle drains energy to heat. The energy was obtained earlier when you were accelerating. So, as far as possible, reduce acceleration and use engine brake as much as possible (9999 mpg). :thumbsup:
aerosignal:
Another interesting observation. It was interesting playing with the MPG gauge because it has a gallon per hour function. I was able to play with the consumption of various items. For example, aircon increases comsumption by 20% when car is idling. This was in the U.S. where it was relatively cool (winter-spring). So can expect quite alot more here. Headlights increase consumption by about 5% during idling.
Idling consumes about .4 gallon/hour (~1.6L/hour).
Another example about aircon. When I used to work in tuas, I leave at 6-630 and aircon will usually be lowest speed ( I set 27). FC is 17km/L. When I go ICT, I leave at 5.30 and car gets really hot. Aircon will full blast for about 5-10 (sometimes 15 mins) mins to cool down to 27 degrees. My FC during ICT will drop to 15.5 km/L. Driving pattern remains the same because camp and work place in same area.
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