What should be noted when ordering a car?

What is the working principle of an engine ignition coil?

The ignition coil is essentially a transformer that operates on the principle of electromagnetic induction. It converts the 6-volt low-voltage current from the battery or magneto into a high-voltage current ranging from 11,000 to 15,000 volts. The ignition coil primarily consists of a low-voltage coil (also known as the primary coil), a high-voltage coil (also known as the secondary coil), and an iron core. The low-voltage coil is wound with thicker copper enameled wire and has fewer turns. One end of this coil is connected to the power source, while the other end is linked to the circuit switch (breaker). The high-voltage coil, on the other hand, is wound with finer copper enameled wire and has many more turns. One end of this coil is connected to the spark plug, and the other end is grounded to the vehicle body. Below is a brief introduction to the ignition coil: 1. Function: It transforms low-voltage direct current into high-voltage electricity, which can reach tens of thousands of volts, and uses the spark plug in the cylinder to ionize and break down the air, generating an electric spark. 2. Transformer: Ordinary transformers operate at a fixed frequency of 50Hz, also known as power frequency transformers. In contrast, the ignition coil operates in a pulsed manner and can be considered a pulse transformer. It repeatedly stores and releases energy at varying frequencies depending on the engine's speed. When the primary coil is connected to the power source, a strong magnetic field is generated around it as the current increases, and the iron core stores this magnetic field energy.

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What is the Difference Between Dual Clutch and Continuously Variable Transmission?

The differences between dual clutch and continuously variable transmission are: 1. Different working principles. The continuously variable transmission achieves gear changes by altering the diameter of the pulley; the dual clutch consists of two sets of manual transmissions, pre-combining the next gear to be shifted. 2. Different driving smoothness. The dual clutch transmission system has fast shifting speed and minimal power loss during power transmission; the continuously variable automatic transmission offers a smooth shifting feel with linear power output, providing a more stable driving experience. 3. Different vehicle adaptations. Dual clutch transmissions are mainly divided into dry and wet types, primarily used in the European automotive market; continuously variable transmissions are suitable for use in small-displacement, lighter-weight vehicle models.

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Can Scratch Wax Remove Scratches?

Scratch wax is the best solution for removing scratches without color difference, aside from repainting. Scratch wax essentially functions like a polisher, similar to sandpaper, exerting a physical effect on the car's paint surface. If the vehicle's scratches have not damaged the primer and there are no dents on the paint surface, they can be repaired by repeatedly wiping with a towel and scratch wax. When using scratch wax, it's important to control the frequency of waxing. Depending on the driving environment and parking locations, the interval between waxing should vary. You can also judge by touch; generally, when the body feels rough to the touch, it's time to rewax. Before waxing, clean the car's surface of dirt and dust with water, dry it thoroughly, and then apply the wax in a shady area to prevent the car body from heating up. As temperature rises, the adhesion of the wax decreases, affecting the quality of the waxing. After waxing, some wax residue may remain in the gaps of the car lights, license plate, doors, and trunk. If not cleaned promptly, these residues can cause rust. After using scratch wax, the car's paint surface may become matte to varying degrees. As mentioned earlier, the principle of scratch wax is similar to sandpaper—it uses fine particles to grind the areas with minor scratches on the car's paint surface to make them smooth. When applying scratch wax, it doesn't just target the specific scratch but affects the entire waxed area with abrasive action. Therefore, although the scratches disappear after using scratch wax, the waxed area's paint surface will not be as shiny as before.

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What type of engine oil is suitable for the Volkswagen Lavida naturally aspirated engine?

Volkswagen Lavida naturally aspirated engines use 5W30 semi-synthetic engine oil. The functions of engine oil are: 1. To separate the surfaces of relatively sliding components, thereby reducing wear. 2. To carry heat back to the oil tank and then dissipate it into the air, assisting the radiator in cooling the engine. 3. To circulate carbon deposits, sludge, and worn metal particles from engine components back to the oil tank, flushing away contaminants generated on the working surfaces of the parts through the flow of the lubricating oil. Below is an introduction using the 2019 Lavida as an example: 1. Body dimensions: It is a compact car with dimensions of length 4670mm, width 4670mm, height 1474mm, and a wheelbase of 2688mm. 2. Body weight: The minimum ground clearance is 190mm, and the body weight is 1480kg.

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What does 'Please Check Engine System' mean?

Please check engine system refers to the need to inspect the engine to determine if there is a fault in the emission system or an issue with the oxygen sensor. When the engine experiences a malfunction, these faults generate a series of codes. After the ECU reads the fault codes, they will appear as indicator lights on the dashboard, requiring the owner to visit a 4S shop to read the fault codes and identify the specific cause. The engine is a machine capable of converting other forms of energy into mechanical energy, first developed in the UK. It can be used as a power generation device or refer to the entire machine including the power unit. Its types include internal combustion engines, external combustion engines, electric motors, etc.

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How to Diagnose Yellow Warning Light Issues?

There are many yellow warning lights on the vehicle dashboard. Here are some common ones: 1. A yellow triangle with an exclamation mark in the middle. The appearance of this icon indicates a problem with the VSA (Vehicle Stability Assist) system, also known as the general fault indicator light. There are many possible causes: 1. Dry dual-clutch transmission overheating; 2. Fuel cutoff system intervention or malfunction; 3. Parking sensor failure; 4. External light malfunction; 5. Engine oil pressure sensor failure; 6. Drive acceleration slip regulation warning or malfunction, etc. 2. There is a horizontal line under a bracket. At the bottom of the horizontal line is a small zigzag with an exclamation mark in the middle. The entire icon is yellow. This is the tire pressure warning light, indicating abnormal tire pressure that requires detection. 3. A circular gear with an exclamation mark in the middle. This is the transmission fault indicator light, usually visible only in transmissions equipped with multitronic. When this light is on, it indicates an abnormal or faulty transmission. 4. This icon looks very similar to a light bulb with an exclamation mark in the middle. This is the fault indicator light. When the fault indicator light is on, it means there is a malfunction in the external bulbs, requiring repair or replacement. When a yellow light on the dashboard is illuminated, it is necessary to identify which icon it is, as different icons represent different fault causes. If the external lighting is not functioning properly, it is recommended to check whether the vehicle's headlights, fog lights, daytime running lights, turn signals, brake lights, and reverse lights are working normally. Any malfunction should be addressed promptly.

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What should be noted when ordering a car?

What is the working principle of an engine ignition coil?

What is the Difference Between Dual Clutch and Continuously Variable Transmission?

Can Scratch Wax Remove Scratches?

What type of engine oil is suitable for the Volkswagen Lavida naturally aspirated engine?

What does 'Please Check Engine System' mean?

How to Diagnose Yellow Warning Light Issues?

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