In reply to Tyler: As I understand it, modern vehicles with sequential fuel injection and common rail diesels have the fuel injection mapped so that if the engine RPM "over runs" the throttle setting, the injectors cut off so, going down hill with your foot off the throttle will result in no fuel being burnt whereas at tickover in neutral with engine running will still burn fuel to keep the engine running although this is a small amount.
EeeByGum 08 Dec In reply to tom valentine: Coasting in gear your car will get slower and slower unless on a very steep hill, so unless you change gear at some point the revs will drop below idle speed. In reply to petellis: Well aware of how to bumpstart a car, but a lot of people wouldn't know, or would be too panicked by the heavy steering if going around a corner at the time etc to think quickly enough to do it. And yes, it is unlikely to stall itself, but it could.
I'm no safety nut or anything, as you'd know if you saw my driving, just trying to give good safe advice on a public forum. Chris F 08 Dec In reply to Tyler: There used to be an East German I think car called a Wartburg that disengaged the engine when you took your foot of the accelerator and the car coasted Had a two stroke engine I seem to remember.
In reply to Tyler: Good grief - you should watch the people around where I am. Firstly, the cars mostly won't coast. Secondly, the cornering technique is to slow down well in advance, ease carefully around the curve, indicate to show you've been successful, I guess , slow down some more to get over the shock of moving the steering wheel one handed you are, of course, on your mobile and then slowly and carefully accelarate OK a bit off topic, but I'm glad to get it out of my system.
It was a free wheel actually, like on a bike where when you stop pedalling it just carries on. One of the MCMC lads had one and ran us around in it sometimes. In reply to pneame: LOL, just checked you didn't live near me in your profile and found you live in the American gods waiting room.
Dr Rorlasaurus 09 Dec You cannot freewheel in gear. If the clutch is down you are not in gear the gears aren't connected to the engine therefore you are in neutral. If you are in gear and you stop using the accelerator the engine will slow, known as engine braking. Martin W 09 Dec A lot of modern industrial and marine diesels are two-strokes; they often use some kind of forced induction system, as did the Napier Deltic diesel engine which powered the locomotives on the East Coast Main Line in the s and 70s.
Those had two turbocharged Deltic engines, providing 1,bhp each, which created their characteristic "turbo whine" when on power. I have to be pedantic, the Napier Deltic engine was origonally made for MTB's and as with all 2 stroke diesels they have to be supercharged. It is not illegal. Whist it may not be illegal the Highway Code advises against it. Rule Coasting. This term describes a vehicle travelling in neutral or with the clutch pressed down.
It can reduce driver control because engine braking is eliminated vehicle speed downhill will increase quickly increased use of the footbrake can reduce its effectiveness steering response will be affected, particularly on bends and corners it may be more difficult to select the appropriate gear when needed.
I think you will find it is Illegal Tourman as you are not in full control of the car. So each time a driver depresses the clutch pedal, they are not in full control of the car — albeit only for a short while. Did you read the Question that was put in by Lucky Hymie?
It seems you have not. No damage.. Won't save anything. I know it is not illegal TWR! If you did lose control of the car and caused a crash then you could be prosecuted for careless or dangerous driving but it is not illegal! Completely agree with you TWR. Going off subject here a little I know, but for those that consider coasting "not in full control of a vehicle" couldn't you argue the same point regarding the use of the cruise control which could potentially be more dangerous than letting a vehicle coast?
It's possible to drive out of gear free-wheeling in a lot of situations. Your car is out of gear much of the time anyway when stopped, between gear shifting , and this is just expanding the number of situations where you leave it in neutral.
You can 'coast' between traffic signals and such that you expect to change. This will take all of the engine and transmission drag out of the picture. This is also safer when used appropriately in rainy conditions as it can prevent hydroplaning.
Some say that you don't need to wear one when traveling short distances, while others say they're traveling slow enough not to need it. What's more disturbing is that, these days, some cars come with a seatbelt chime reminder but some people simply latch it for it to stop beeping.
Granted, a lot of cars get good scores in their crash tests, but only with the use of this life-saving device. Whether driving to the shops or going on a road trip, always wear your seat belt. You can always be careful behind the wheel but, remember, not everyone is.
We all want to make the most out of fuel economy, especially on long drives. There are several ways to go about it such as being easy on the gas pedal, improving your anticipation and driving smoothly. Freewheeling however, isn't one of them. Freewheeling is putting the car in neutral and letting the gravity maintain the car's momentum.
Why is it dangerous? Let us explain. When your car is in neutral, there is no power being sent to the wheels, meaning that if you have to step on the gas to avoid something, you will not be able to accelerate out of harms way.
With no drive to the wheels, there is a higher risk for the car fishtailing out of control. If you do decide to put it in gear in an emergency, freewheeling increases your reaction time as you have to shift the car into gear while doing the maneuver. There's a reason why there are signs that say 'keep distance' on the highway. At higher speeds, more distance is needed for a car to stop and should the car in front stop or slow down suddenly, you have time to react and take evasive action.
If you tailgate, there is less room for error and thus, increasing risk of a collision. This also applies in traffic too, especially on an incline.
Stand to close to the car in front and the car in front may roll back and hit your bumper. Out on the highway, the ideal gap between two cars is three seconds or about three car lengths. This is more than enough time to react to an emergency situation. A common mistake when driving downhill is riding the brakes to maintain your speed. This dangerous practice can lead to the loss of braking performance, as well as the loss of control.
What this does is burn the brakes and boil the brake fluid.
0コメント