While cruising...
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Is it true that while cruising, if you turn off the air con, the engine will be more powerful?
i believe there is no different. what your view? -
Got different! depend on yr make n model too.
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Got, like mine, off air-con only, pickup very fast and powerful. That's why I alway on air-con, scared accident or caught speeding.
SAFETY 1st especially when wife and kids are on board. -
supposedly FC also lower
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not supposedly...Originally posted by TheDream:supposedly FC also lower
it IS lower... provided u dun wind down windows at high speed...
cos aircon generator draws its power from the crank.... -
the difference is not that significant really. On older models, you might feel the effects of the compressor kicking in on and off while driving.
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i always thought the alternator is the 1 supplying the electricity to the compressor.Originally posted by n0x:cos aircon generator draws its power from the crank....
mean to say, as long as you are cruising at 2000rpm, the power from the alternator is always available.. cos the alternator is turing mah.,
unlike when you are at a stop, the engine had to ram to 1000~1100rmp when the compressor kick in.
correct me if im wrong...
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Typically in an engine, the alternator, coolant pump and a/c compressor are all powered by the crankshaft pulley, with the belt running all around them. If you remove the belt, the engine will still start, but you see the battery light coming on in your instrument panel, meaning there's no charging... which means no power from the alternator. Why? cos no belt to transmit power to the alternator. same if you try to turn on the a/c... blower will still run, but it will not be cold, cos compressor not running. And then your car will overheat in a matter of minutes cos the coolant is not running. Get the idea?Originally posted by Mitsubishi hater:i always thought the alternator is the 1 supplying the electricity to the compressor.
mean to say, as long as you are cruising at 2000rpm, the power from the alternator is always available.. cos the alternator is turing mah.,
unlike when you are at a stop, the engine had to ram to 1000~1100rmp when the compressor kick in.
correct me if im wrong...
Today's car now usually have built in pressure control inside the a/c compressor... meaning it will not keep switching on and off to control the a/c gas pressure in the system; the compressor will keep running all the time. Older compressors rely on the switching on and off of the the whole unit to regulate the gas pressure inside the a/c system... hence you'll feel the compressor kicking in at times during driving or idling. -
and the crank shaft is turning the gear box during criusing. thus, whether you on the AC or not, the engine power is still allocated/connected to the compressor, coolant pump, alternator and stuff.Originally posted by tomsss:Typically in an engine, the alternator, coolant pump and a/c compressor are all powered by the crankshaft pulley, with the belt running all around them. If you remove the belt, the engine will still start, but you see the battery light coming on in your instrument panel, meaning there's no charging... which means no power from the alternator. Why? cos no belt to transmit power to the alternator. same if you try to turn on the a/c... blower will still run, but it will not be cold, cos compressor not running. And then your car will overheat in a matter of minutes cos the coolant is not running. Get the idea?
To conclude, in theory: the AC usage is not affecting the engine power during cruising( that is at about 2000-2500rpm).
thank you la. -
But for the sake of fuel economy and the environment just switch the A/C off (you can still leave the fan on) when it's not necessary.
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whalau
so cheem