Lean mixtures ( low fuel-to-air ratio ) burn hotter than rich mixtures ( higher fuel-to-air ratio ) and operating temperatures can be raised to levels that can prematurely destroy the glow plug if too lean a mixture is used ( " over-leaning " ).
32.
With the fuel inlet valve open, the fuel pump continues pumping fuel into the fuel bowl, where the resulting excess fuel causes the fuel-air ratio to become lower than nine to one, which is then too rich for combustion to take place, stopping the engine.
33.
:: : : : I think the reason why my saying the incantation makes a difference is that it causes me to turn the knob more slowly, delaying the spark until the right fuel / air ratio is reached . talk ) 22 : 10, 1 November 2012 ( UTC)
34.
When such a " blip switch " was intermittently used on landing approach, this allowed a limited degree of engine speed control, as rotary engines generally did not have a conventional throttle in their carburetors to regulate engine speed, but only for governing the fuel-air ratio for startup and full-speed operation.
35.
A " cold " engine makes the computer change the fuel air ratio so the output voltage of the o2 sensor switches between about 100 and 850 / 900 mV and after a while the sensor may output a switch voltage between about 200 and 700 / 750 mV, for turbocharged cars even less.
36.
The lack of gas / combustion-air ratio devices from the installed 20 million local gas fired room heaters in the EU is very unfortunate because of the serious energy wasting, but on the other hand this is a great possibility to save 20 % primer energy at this area, compared to the existing situation, with low investment costs.
