Automotive Technology 썸네일형 리스트형 PCU Powertrain Control Unit During cleaning up my study room, I have found a very old PCU which my project team has developed for Hyundai's A-segment sedan in 2007. This is the scrap after PCB heat-up test, the burnt damage can still be seen in the copper connection between PCB and connector. Nowdays, the size of control unit is much smaller than this one and number of integrated functions are tens of times increased. It i.. 더보기 Coolant Temperature Sensor Our human body has to keep a certain range of temperature (37deg C) for healthy daily life. Like our body, an internal combustion engine is designed to be operated optimally under a certain temperature condition. In general, the coolant temperature stays around 90 deg C for an optimal operation of an engine. If the operation temperature stays out of this designed range, the engine can show sever.. 더보기 Sensors_General A power control system in vehicles works as a system composed with sensors, controller and actuators. We can easily compare any system with our body system. We have sensors, such as, eyes to see, nose to smell, tongue to taste, etc. Our brain analyze the signals from our sensors and make and order to the actuators (our hand, leg, foot, any kind of muscle in our body) for a planned purposes. Nowa.. 더보기 Autonomous Driving_Map The navigation function will be an essential part of autonomous driving system in addition to the “control” function. The route calculation from the start point to the destination is a normal service supported from the current navigation system, but the current map information is far away from the required quality of map for autonomous driving. For autonomous driving all the information on the m.. 더보기 Autonomous Driving_Control This “Control” part will replace the function of thinking and deciding of human’s brain, therefore we need to have very high level of technology to develop this artificial brain of autonomous driving system. If we analyze the brain function during driving, the sequence could be described : Perceive à Decision à Control Order. For the autonomous driving we need to have exactly same system working.. 더보기 Autonomous Driving_Sensors To realize autonomous driving, the system has to cover all the functions which we have as a perception system in our body, and in addition error-free function should be guaranteed. (Just one functional failure can cause lethal consequence in a road driving situation.) The most important hard working sensor in our body during driving is our eyes, the multi-dimensional functions to check short or .. 더보기 Autonomous Driving_Overview We can tell that the perormance of vehicles has reached a satisfactory level already. The maximum speed has reached over than 200kmh, even over 300kmh in case of luxury one. This means the vehicle speed has reached the level that a humanbeing cannot control with the feedback from driver’s eye body system. In the transmission side, there is already multi-step transmission over 11steps, and furthe.. 더보기 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 이전 1 2 3 4 다음
