What are the letter codes for license plates in Hunan?

What is the appropriate tire pressure for family sedans on highways?

For family sedans running on highways, it is recommended to inflate the tires to around 250 or 260 Kpa. When driving at high speeds, if the tire pressure is too low, it can cause excessive compression and deformation of the tire carcass. As the speed increases, severe cases may even lead to standing wave phenomena in the tires, resulting in blowouts. Hazards of low tire pressure: Increased friction coefficient with the road surface, leading to higher fuel consumption; Heavier steering wheel and tendencies to veer, which are factors detrimental to driving safety; Increased movement of various parts of the tire, causing abnormal heat due to excessive rolling; Reduced functionality of the cords and rubber, leading to delamination or cord breakage, and excessive friction with the rim causing damage to the bead area and abnormal wear; Exponentially increased friction between the tire and the ground, causing a sharp rise in tire temperature, softening of the tire, and a drastic decrease in strength. High-speed driving under these conditions may lead to blowouts; Increased deformation of the tire body, making the sidewalls prone to cracking, along with flexing movements that cause excessive heat, accelerating rubber aging, fatigue of the cord layers, and cord breakage. It also increases the tire's contact area with the ground, accelerating wear on the tire shoulders.

9

3

Share

What is the lifespan of a plug-in hybrid vehicle's battery?

The normal lifespan of a plug-in hybrid vehicle's battery generally ranges from 1 to 8 years, which largely depends on the condition of the vehicle. Battery lifespan: Even if left unused, the battery will degrade over time. Plug-in hybrid vehicles typically use lithium-ion batteries, including ternary lithium batteries and lithium iron phosphate batteries. The former, due to the chemical activity of lithium ions, is prone to combustion if damaged in an accident, while the latter, although more stable, can experience up to approximately 50% degradation in low-temperature conditions. Reduced activity of lithium-ion batteries: All lithium-ion batteries exhibit reduced activity and significant premature degradation in low temperatures. This type of battery degradation in cold conditions is currently unavoidable as long as lithium-ion batteries are used. Therefore, in northern winters, the driving range of a plug-in hybrid vehicle relying solely on the battery is much shorter compared to driving at around 20 degrees Celsius, not to mention the additional energy required for heating.

17

5

Share

Is the Engine Not Working Due to the Computer Board?

The engine not working is not necessarily due to the computer board. Check the spark plugs and cylinder wires: Ensure the spark plug gap meets the original factory technical standards, and the resistance value of the cylinder wires also complies with technical requirements. Adjust or replace them if they do not meet the specifications. Perform a fuel pressure system inspection: Check the fuel pressure gauge and fuel pressure gauge assembly, connect the fuel pipe and gauge. Start the engine and let it idle. The fuel gauge reading should be within the range of 270-320 kPa. If the pressure exceeds the technical specifications, replace the fuel pressure regulator and fuel filter. Inspect each cylinder's fuel injector: Let the engine idle, disconnect each fuel injector plug one by one, and observe if there is any change in idle speed. If disconnecting each injector results in a similar reduction in idle speed, the injectors are functioning normally. If disconnecting a particular injector does not affect the engine's idle speed or stability, measure the resistance of the injector plug. It should be between 10-13 ohms. Replace the injector if it does not meet the standard. Additionally, inspect the wiring between the PGM-FI main relay and the plug connection points, as well as any potential breaks or poor connections in the wiring between the plug connection points and the injectors. Fuel pump and fuel pump circuit inspection: For the fuel pump, remove the fuel tank cap and turn the ignition to the ON position. You should hear the fuel pump operating at the fuel filler opening. Under normal conditions, the fuel pump should run for 2 seconds when the ignition is turned ON. If the fuel pump does not operate, first check if the fuel pump fuse is blown. Also, verify the continuity between the PGM-FI main relay and the plug terminals, etc.

7

1

Share

How many kilometers should a motorcycle's belt be replaced?

The belt of a motorcycle should be replaced every 30,000 kilometers. Transmission system components: The belt of a scooter motorcycle is a part of the transmission system and does not affect it. If the motorcycle fails to start after replacing the belt, you can check whether other components were accidentally touched during the belt replacement, such as the wiring of the ignition system or the rubber hose of the carburetor. The connection with the crankshaft and a certain transmission ratio ensure the accuracy of the intake and exhaust timing. Since timing belts are rubber products with a limited service life, regular inspection of the engine timing belt is required depending on the car brand and model, and the need for replacement should be determined based on the inspection results. Regular replacement: Belts are rubber products, and prolonged use can lead to aging. Therefore, belts need to be replaced regularly. If the belt is not replaced for a long time, it may wear out and crack, posing a risk of breakage. If the belt suddenly breaks while riding, the motorcycle will instantly lose power, which is very dangerous.

13

3

Share

At What Battery Level Should a New Electric Vehicle Be Charged?

Regarding the question of how much remaining battery is appropriate for recharging new energy pure electric vehicles, Hydrogen Cloud Chain's research on relevant vehicle models' reports indicates that the optimal charging range is between 20% and 90%. Charging within this range can minimize the impact on the power battery and effectively extend its service life. Power Battery: As is well known, the current domestic power batteries are mainly ternary lithium and lithium iron phosphate. Ternary lithium batteries are most afraid of overcharging and over-discharging. Overcharging can lead to fires, while over-discharging (complete depletion) can cause the entire battery to fail. Low Battery Warning: To prevent new energy vehicles from discharging completely, some manufacturers set a low battery warning at around 15%. Of course, the vehicle is not immobilized at this point and still has a certain driving range left. If you continue to drive, the vehicle's speed will be limited. Even if you press the accelerator pedal all the way down, the vehicle's speed can only be maintained at around 40 km/h.

6

4

Share

Can Small Flatbed Trucks Drive on Highways?

Small flatbed trucks can drive on highways. Vehicles allowed on highways: Motor vehicles designed with a speed higher than 70 kilometers per hour are permitted to enter highways. In real life, each province has formulated additional regulations, measures, and other rules based on the actual conditions of their highways. For example, some provinces allow motorcycles on highways, while others do not. Vehicles not allowed on highways: Article 67 of the Traffic Safety Law: Pedestrians, non-motor vehicles, tractors, wheeled special-purpose machinery vehicles, articulated buses, full trailers, and other motor vehicles designed with a maximum speed lower than seventy kilometers per hour are not allowed to enter highways.

5

4

Share

What are the letter codes for license plates in Hunan?

What is the appropriate tire pressure for family sedans on highways?

What is the lifespan of a plug-in hybrid vehicle's battery?

Is the Engine Not Working Due to the Computer Board?

How many kilometers should a motorcycle's belt be replaced?

At What Battery Level Should a New Electric Vehicle Be Charged?

Can Small Flatbed Trucks Drive on Highways?

What Does It Mean When the Engine Warning Light Comes On?

Why does the engine fault light come on after a jump start?

What Are the Must-Have Items for Motorcycles?

What Causes High-Speed Shimmy in Small Cars?