SOUNDS LIKE A BROKE TIMING BELT
I would start by checking any leaks in your exhaust and fuel filter area, if there is any leaks throughout the exhaust the smell of gasoline or exhaust may come through into the interior.
heater core going bad.
If you smell wires burning, most likely that is the exact problem. If two wires were to melt together it would short the battery and kill it very easily.
If it's a sweet smell then its probably a heater core leaking antifreeze.
The sulfur smell is the catalytic converter. There will always be some smell of sulfur. The converter changes the carbon monoxide in the exhaust to sulfur dioxide. Strong sulfur smell may be an indication the converter needs to be changed. This can also be a symptom of a leaking battery. We had a battery crack, and the sulfur smell was almost overpowering for a couple of days. Even after it was replaced, the smell lingered for a bit.
If your talking about cars... If you smell a burning smell, or your red battery light comes on then i would get your alternator checked out!
Answer is: battery is being overcharged. The cause could either be the alternator or voltage regulator, depending on the year and make of the vehicle. There is a very foul egg smell associated with a steaming battery. When this occurs, always look for the signs of steam. The battery will be hot to the touch and it should not be run more than to the parts store for a new battery or the dealership for a battery and checkout of the charging system.
If an automobile battery is in normal condition, there should be very little smell from it. The one smell that you should be aware of is the smell of rotten eggs, which indicates severe and dangerous problems with the battery. Once a battery begins to smell like rotten eggs, it cannot be saved, but must be immediately replaced. Please be aware that rotten-egg batteries can explode. Rotten-egg batteries are frequently much hotter than normal batteries would be, and the hot rotten-egg batteries are the most dangerous. The most common cause of rotten-egg batteries is an alternator which constantly overcharges, so the alternator should usually be replaced along with the battery.
Yes, that is possible.
u smell
your machine might smell like fruit!
Stop driving until the charging system and battery have been checked for an overcharging condition.