Home |
Search |
Today's Posts |
|
London Transport (uk.transport.london) Discussion of all forms of transport in London. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
|
|||
|
|||
Green Party lunacy
"scott" wrote in message ...
Redonda wrote: Gawnsoft wrote: On Wed, 31 Mar 2004 19:59:08 +0100, "Redonda" wrote (more or less): scott wrote: Redonda wrote: It's odd that many people equate exhaust emissions with road speed rather than engine revs. Care to explain? The lower the gear ratio used for a given road speed the faster the engine is turning, although I do realise that a poorly set up engine using more torque in a high gear at low speed *will* spew out more unburnt fuel particles. The specific fuel consumption of an engine is lowest when revving at the torque peak. If an engine is revving at the torque peak in a high gear, going quickly, the throttle depression will be higher (i.e. more fuel being fed into each rev of the engine) than when travelling at a lower speed, in a lower gear, but with the revs at the same level as before. snip Again, it's not the use of lower gears or accelerating hard that trashes the fuel consumption, it is braking. Try to keep a good gap infront and try to anticipate having to slow down and ease off the accelerator. (I guess this might be hard in London!!!) This is the best way to increase fuel economy. Every time you brake, think to yourself all the fuel you've just wasted by accelerating up to that speed. Or to simplify, aim to maximize your minimum speed, rather than minimizing your maximum speed. In other words everytime you have to slow to a halt, that fuel wasted having to get back up to speed after. You might find you make better progress too, by passing transistion points like traffic lights turning green at 15mph, rather than from zero. |
#2
|
|||
|
|||
Green Party lunacy
"Davemar" wrote in message om... Or to simplify, aim to maximize your minimum speed, rather than minimizing your maximum speed. In other words everytime you have to slow to a halt, that fuel wasted having to get back up to speed after. You might find you make better progress too, by passing transistion points like traffic lights turning green at 15mph, rather than from zero. It still goes the other way too. If you are going to have to slow to 0 or 15, its still better to do so from 25 or 30 rather than 35 or 40. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Green Party lunacy | London Transport | |||
Green Party lunacy | London Transport | |||
Green Party lunacy | London Transport | |||
Green Party lunacy | London Transport | |||
Green Party lunacy | London Transport |