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Automotive Technology/Body & Chassis

Wheel Alignment If we have a precise look on our shoes, we can find that our heel is designed always higher than toe. Why ? Why the heel should be always higher than ? The answer is because we walk forward, not backward. Like this simple difference in shoe design, we can design the shoe of a vehicle in this way also to give a better driving behavior by giving a small asymmetrical difference in suspension linkag.. 더보기
Clutch Assembly Clutch Assembly The clutch assembly is located between engine and manual transmission and it provides a mechanical coupling between the engine’s flywheel and input shaft of the transmission. To operate the clutch the driver should push the clutch pedal, then the mechanical linkage transfers the forces to the clutch assembly. Normally a clutch is always engaged (if no power is applied in the peda.. 더보기
ABS/TCS/VDC ABS (Anti Block System) was originally invented for airplane, because keeping weight balance in airplane is very hard because of long wing span if skidding happens at the tires during landing or taxing. Now, most of the vehicles are equipped with this ABS device and this helps quite a lot for safe driving. Slip Ratio When drivers pushed brake pedal, the pedal forces are converted into hydraulic .. 더보기
Brake System Brake Systems If I want to stop a running vehicle, what can I do ? The easiest way is cutting power flow from engine to driving wheels, then the vehicle will surely stop in a while, not so effective and quick enough as I want. Therefore, the quickest way to stop a running vehicle is to grab wheel not to be able to turn and let the road surface grip the tire surface, then we can reduce the speed .. 더보기
Vehicle Performance (2) Vehicle Performance (2) Gradient Resistance This resistance force is originated from the gravity. If the road is up-hilled shape then we need stronger traction than plane road. If we can describe this resistance as an simple equation, it will be like below. G-Resistance » Weight x sine (Road Gradient) Rolling Resistance This resistance comes from the contacting surface between tire and road. Whe.. 더보기
Vehicle Performance (1) Vehicle Performance (1) When I was a very young boy, I liked to watch vehicles on the road, specific interest was given to the speed limit of the vehicle which was written on the right most side of the speedometer. The young boy thought that the number of the speedometer expressed the real maximum speed of the vehicle, which was not true (I have realized after joining a automotive manufacturing .. 더보기