4 ms·
Also, you can see a trail of white smoke behind the car: fumes from the burned oil are white. [For the uninitiated: 2-stroke engines require adding oil to fuel
by jwr 7y ago
Also, you can see a trail of white smoke behind the car: fumes from the burned oil are white.
[For the uninitiated: 2-stroke engines require adding oil to fuel, as there is no separate oil chamber, so when you fill up the tank, you need to add a pre-determined amount of oil]
- bigiain 7y agoI dunno about Trabants, but one of my motorcycles is a two stroke (a Cagiva Mito) and except when it's cold and on the choke, you definitely can't see any smoke coming out it's exhaust. It's certainly burning the oil, it goes through about 1 litre of oil every 1000km or so. It runs an oil pump, so there's a separate tank for fuel and oil, and the pump mixes them before the carburetor.
- TheSpiceIsLife 7y agoThis isn't strictly true. As was pointed out to me elsewhere here today, Evinrude use a point-oiling system[1] that, combined with direct injection, results in air pollution no worse than a four-stroke, and it can achieve higher thermodynamic efficiency.[2] 1. https://en.wikipedia.org/wiki/Evinrude_Outboard_Motors https://en.wikipedia.org/wiki/Evinrude_Outboard_Motors 2. https://en.wikipedia.org/wiki/Two-stroke_engine#Emissions https://en.wikipedia.org/wiki/Two-stroke_engine#Emissions
- whenchamenia 7y agoI have a few 2 stroke bikes. Neither smoke while running, but the race engine can ocassionally burp a bit with rapid throttle changes. The stock 1970s engine does not even smoke on startup. I usually replace the auto-oilers with premix for reliability. If an oil-injection system fails, signifigant engine wear occurs.