>-----Original Message-----
>From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] 
>Sent: 09 May 2006 17:28
>To: Microcontroller discussion list - Public.
>Subject: Re: [ee] Basic physics... Bicycle regenerative braking forces
>
>
>
>>
>> Another interesting tidbit to consider though is that modern 
>cars are 
>> MUCH more sensitive to the cold then older cars. My Olds didn't even 
>> notice when it was -20C, it's fuel economy remained exactly 
>the same. 
>> OTOH my current car goes from 8.5L/100km in the summer to nearly 
>> 10L/100km in the winter, a dramatic difference. I thought something 
>> was wrong with the car, but my brother has a car with the exact same 
>> drive train and had the exact same result.
>
>Any idea why? I'd expect the engine temperature to stabalize 
>pretty quickly. 

Cold air is denser, so more fuel gets injected (assuming injected engined rather than carbs), hence more power in cold weather!  However, it shouldn't make it use more fuel unless you take advantage of the extra power...

Regards

Mike

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