With the development of gasoline engines in automobiles towards high speed, high compression ratio, high power, low fuel consumption, and low emissions, traditional ignition devices are no longer suitable for use. The core components of ignition devices are ignition coils and switch devices. By increasing the energy of the ignition coils, the spark plug can generate sufficient energy to produce sparks, This is the basic condition for the ignition device to adapt to the operation of modern engines. The ignition coil is divided into two types according to the magnetic circuit: open magnetic and closed magnetic. The traditional ignition coil is used with an open magnetic type, and its iron core is stacked with about 0.3 millimeters of silicon steel, with secondary and primary coils wound around the iron core. The closed magnetic type uses an iron core similar to III to wrap around the primary coil, and then wraps around the secondary coil outside. The magnetic field line is composed of an iron core to form a closed magnetic circuit. The advantage of the closed magnetic ignition coil is that it has less magnetic leakage, Due to its small energy loss and volume, electronic ignition systems generally use closed field ignition coils)
The Mercedes Benz ML is a mid to large SUV class of Mercedes Benz cars, positioned higher than the GLK and lower than the G and GL classes. The Mercedes Benz M-Class is an SUV model that combines driving comfort and power performance. Unlike the G series, which emphasizes only off-road performance, the ML series emphasizes luxury and comfort, or can be said to be urban driving. The main competitors of the Mercedes Benz ML class are the BMW X5 and Lexus GX, which are better at sports style compared to their competitors, The Mercedes Benz ML Class has put a lot of effort into comfort. The interior materials are carefully selected and the configuration is very rich. There are four versions of the power system for the domestically launched Mercedes Benz ML Class: 3.0L V6.3.5L V6.5.5L V8 and 5.5T V8
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