Can a Dash Cam Record When the Car is Off?

What is the difference between AT and CVT

AT and CVT differ in the following aspects: 1. Principle: AT works by using a torque converter whose automatic shifting and torque variation range is insufficient, so several rows of planetary gears are connected in series behind the turbine to improve efficiency. The hydraulic control system automatically operates the planetary gears according to the engine's working changes, achieving automatic shifting and torque variation. CVT's transmission pulley structure is quite unique, divided into movable left and right halves that can move closer or apart. The conical discs can tighten or expand under hydraulic thrust, squeezing the steel belt chain to adjust the width of the V-shaped groove. When the conical discs move inward to tighten, the steel belt chain is pushed outward from the center, and vice versa. This changes the diameter of the disc driven by the steel belt chain, altering the transmission ratio. 2. Usage: AT does not require clutch shifting, has fewer gears but significant changes, and connects smoothly, making it easy to operate. It provides convenience for the driver and comfort for passengers. CVT, lacking the transmission gears of a typical automatic transmission, eliminates the shifting process and the associated jerky sensation. Therefore, CVT transmissions deliver linear power output, offering a very smooth driving experience.

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What is the normal high pressure for a car air conditioner?

The normal high pressure for a car air conditioner should be 1.3-1.7MPa (13-17kg/cm2 or 190-250Lbf/in2); the normal low pressure should be between 0.15-0.25MPa (1.5-2.5kg/cm2 or 20-35Lbf/in2). 1. Car air conditioning system: The car air conditioning system is a device that cools, heats, ventilates, and purifies the air inside the vehicle. It provides a comfortable environment for passengers, reduces driver fatigue, and improves driving safety. The air conditioning system has become one of the indicators of a car's functionality. 2. Disadvantages of car air conditioning: When the air conditioner is turned on, it is best for passengers not to smoke in the car. Since the air inside the vehicle circulates in a relatively enclosed environment when the air conditioner is on, first, the smoke is not easily dispersed, and second, the tiny particles in the smoke can adhere to the air intake filter of the air conditioner, causing long-lasting odors in the car. Regular professional cleaning and deodorizing maintenance of the air conditioning system is recommended.

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What Does Electric Four-Wheel Drive Mean?

Electric Four-Wheel Drive: The switching between two-wheel drive and four-wheel drive is controlled by a computer chip. On normal road surfaces, the vehicle operates in two-wheel drive mode. When encountering off-road conditions or wheel slippage, the computer detects and automatically distributes power to the other two wheels. Below is additional information: 1. Part-Time Four-Wheel Drive: Electric four-wheel drive (automatic transmission) is electronically controlled, whereas manual four-wheel drive (manual transmission) is fully mechanically and manually controlled. Since electric four-wheel drive uses a computer chip to control the switching between two-wheel and four-wheel drive, it not only requires higher quality automotive components but also depends on the quality of the control program for the intelligence of the drive mode switching in part-time four-wheel drive systems. 2. Electric Four-Wheel Drive Has Certain Disadvantages: Currently, some drivers favor electric four-wheel drive. However, although it can enhance the vehicle's control over the tires, electric four-wheel drive still has certain limitations on high-intensity unpaved roads. With today's advanced technology, electric four-wheel drive, as an emerging technology, will continue to improve and advance on existing technologies.

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What is the solution for fault code P0342?

P0342 fault code indicates that the position sensor output pulse signal voltage is low. Use an oscilloscope to observe the displayed waveform and determine the condition of the sensor based on the waveform. If the issue is minor, simply replacing the sensor can resolve the problem. Below is more information about automotive fault codes: 1. The Camshaft Position (CMP) sensor transmits the camshaft position (relative valve position) as a voltage signal to the Electronic Control Unit (ECU). This fault code appears when the ECU fails to detect the signal from the A (intake/left/front) camshaft position sensor within a set time period. Possible causes include issues with the CMP sensor circuit, connector, the sensor itself, or a malfunction in the Powertrain Control Module (PCM) or Engine Control Module (ECM). 2. After troubleshooting the vehicle, it is necessary to clear the fault code. When clearing the code, strictly follow the specified method for the particular vehicle model. Do not directly disconnect the negative ground cable to clear the fault code.

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What problems can excessive carbon deposits cause to a car?

Excessive carbon deposits can lead to issues such as poor acceleration, difficulty starting, unstable engine idle, increased fuel consumption, and engine malfunctions. It is recommended to perform intake system maintenance once a year; conduct a deep fuel system maintenance after every 2-3 routine services; and perform engine lubrication system maintenance at least once every two years. Poor acceleration: Carbon deposits reduce the intake passage and lower the charging efficiency, causing increased cylinder pressure and delayed ignition timing, which results in decreased engine power. Difficulty starting the vehicle: Carbon deposits falling into the intake valve seat passages can cause insufficient cylinder pressure. During startup, the injected fuel is absorbed by the carbon deposits, leading to a lean air-fuel mixture in the cylinder and preventing the engine from starting properly. Unstable engine idle: When carbon deposits adhere to the intake valves and throttle valve, the engine cannot accurately control the amount of gasoline and air sent to the combustion chamber, causing unstable engine idle. Increased fuel consumption: When carbon deposits accumulate in the combustion chamber, they can easily cause knocking, leading to delayed ignition timing, reduced engine power, increased fuel consumption, and decreased fuel economy.

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What is the difference between automotive primer and topcoat?

Automotive primer and topcoat differ mainly in their composition. Primer consists of four components: resin, solvent, filler, and additives, while topcoat is composed of three components: resin, solvent, and additives. The primary difference lies in the fact that topcoat contains little to no filler. Additionally, their functions vary. The functional differences between automotive primer and topcoat are as follows: 1. Topcoat functions: It provides scratch resistance, gloss hardness, transparency and texture, aging resistance, and yellowing resistance. These characteristics are primarily reflected in the topcoat, and its quality directly affects the overall quality of the paint film. 2. Primer functions: (1) Filling effect: It fills the capillary pores in the steel plate, facilitating the application of paint on the surface. (2) Supporting the topcoat: It ensures that the topcoat can adhere tightly to the car's surface. (3) Providing fullness: The primer contains many powder materials, which contribute to the thickness of the paint. (4) Cost reduction and energy savings: The price of primer is generally lower.

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Can a Dash Cam Record When the Car is Off?

What is the difference between AT and CVT

What is the normal high pressure for a car air conditioner?

What Does Electric Four-Wheel Drive Mean?

What is the solution for fault code P0342?

What problems can excessive carbon deposits cause to a car?

What is the difference between automotive primer and topcoat?

What Causes the Resonance Hum in the Cab?

What to Do When the Car Still Rolls After Engaging the Handbrake?

Does the C2 have a clutch?

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