A term relevant only to the engine computer's operation. The computer counts drive cycles for a certain few functions, like for example, a detected malfunction may require a set number of drive cycles for the computer to set a trouble code.
One drive cycle is starting the car, and the car running long enough to warm up so it goes into closed loop operation (meaning the computer is controlling or managing engine operation through sensor information it receives). When car is stopped and key turned off-end of drive cycle. It can be just a short trip, an errand to the store, or it can be a longer drive cycle. From the time car is started and goes to closed loop operation till the key is turned off-one drive cycle.
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I could add on this forever fi you're interested. Nothing special about the Jeep drive cycle than any other make. All cars sold in the U.S. are federally mandated to perform those functions that protect our environment-emission controls (less pollution!)- through better running engines. So all manufacturers are kind of pointed in the same direction-computers (ecm,pcm,ecu, et al) that have the RIGHT STUFF, .CYCLING IS IN A COMPUTER'S GENES.
Interesting note: I read somewhere that if you take off the battery from the car to perform a task, for instance; well the keep-alive memory is lost in the computer. I think this is where is stored the peculiar oddities of this engine(All engines wear and exhibit differences.) that the computer has to re-learn. So they say it may take as many as 50 drive cycles for the car to regain it's former performance. azzall for now, cheers.
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