Questions tagged [theory]
Use this tag when the question is **primarily** about the underlying ideas behind how something works. This tag should be used in conjunction with another tag for the area of interest, for example [electrical] or [suspension]. It should not be used "stand alone." Please use the [engine-theory] tag for those questions.
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Idling a cold engine before driving away: contradictory advice
With modern combustion engines it is common advice that idling before driving away for more than a few seconds (to build up oil pressure) does more harm than good, even in "arctic" winter conditions (...
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What are Wheel ticks and Wheel impulses?
I have some Odometry data taken from a Volkswagen Passat which gives the position. This is calculated using wheel ticks and in addition, I also have data which gives me the number of wheel impulses at ...
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Why did old cars have really long throw shifters?
What was the reason that old cars had very long throw shifters and that modern cars now have much shorter throw shifters? For example even old sports cars like the urmodell generation of 911 had very ...
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How does an epicyclic differential split torque?
How does an epicyclic differential split torque even when rotating as a single locked unit with no relative motion between its parts? Should it not have 50/50 torque split because its all rotating as ...
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Could all cars ride four times faster? [Transmission / Differential mechanism]
In a book "How a car works" I have read such sentence:
The crown wheel usually has about four times as many teeth as the
pinion gear, causing the wheels to turn at a quarter the
propeller-...
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Can inline plunger mechanical injection pumps pull through the fuel?
I know that they have lift pumps that bring the fuel towards the plungers so that the plungers can push and pressurize the fuel towards the injectors but i was wondering if lets say we removed the ...
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Why ambient temperature used to measure pressure for car ac system
Since the ac system is located mostly inside a car engine and the car is warmed up prior to adding freon, and the temp/humidity in engine bay is different from ambient temperature//humidity, and all ...
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Do all cars rust eventually even with repeated proper rustproofing methods?
My understanding is that rustproofing works and lasts when done properly, but once the coating used to rustproof wears off I'm guessing the process to rustproof needs to be done all over again. With ...
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Understanding the process of wiring
If 14 gauge wire can supply 120 volts to three 60 watt light bulbs
Then why do some vehicles require 3 power wires for one light bulb ( 2 for HID lighting for the ballast and one for the parking light ...
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