The G in cars is a unit of gravity, with g representing more, mainly gravitational acceleration. During vehicle testing, there are two sets of data: lateral and longitudinal. The lateral data indicates the side-slip limit of the car when turning, commonly understood as the relationship between the vehicle's speed and the angle of the curve without causing side-slip. This represents the vehicle's handling performance. The longitudinal data indicates the vehicle's performance during acceleration and deceleration, i.e., the maximum capacity for speed increase and braking. A car with a higher g value performs better. For general-use vehicles, the maximum and minimum longitudinal values can be achieved, but the lateral values, due to the risk of losing control, are rarely achieved by anyone other than professional drivers. The full vehicle value of a car: This refers to the length and tonnage of the vehicle, charged as a single fee. The vehicle is delivered to a specified location individually, with the fee based on the full vehicle price, equivalent to a charter price. The ECU of a car: ECU (Electronic Control Unit), commonly known as the "onboard computer," is a specialized microcomputer controller for cars, also called the car's dedicated computer. When the engine is running, the ECU collects signals from various sensors, performs calculations, and converts the results into control signals to manage the controlled objects. The inherent program continuously compares and calculates with the signals collected from the sensors during engine operation. The results of these comparisons and calculations control multiple parameters of the engine, such as ignition, idle speed, and exhaust gas recirculation. It also has self-diagnostic and protective functions. The memory continuously records driving data, forming the ECU's learning program to provide optimal control states adapted to driving habits, known as the adaptive program.
