How long in advance should traffic violation points be handled before the driver's license cycle ends?

What is the reason for the Honda CR-V air conditioning not working?

The reasons for the air conditioning not working are as follows: 1. Air in the air conditioning system: Once air enters the air conditioning system, it will cause excessive pressure in the refrigerant pipes, and poor refrigerant circulation will also lead to insufficient cooling. This type of fault is mainly due to the deterioration of the sealing of the refrigeration system or incomplete vacuuming during maintenance. 2. Excessive refrigerant causing insufficient cooling: Excessive refrigerant is usually caused by overcharging during maintenance, as there is a certain requirement for the proportion of refrigerant volume in the air conditioning system. If the proportion is too high, it will affect the heat dissipation, meaning more heat dissipation results in greater cooling capacity; conversely, less heat dissipation results in smaller cooling capacity. Similarly, if too much cooling oil is added during maintenance, it will also reduce the heat dissipation of the refrigeration system.

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What is the model of the original tires on the BMW 325?

The original tire model for the BMW 3 Series is 225/45R18. The main tire brands for the BMW 3 Series include Michelin PS3, Pirelli P7, Bridgestone Potenza, and Turanza, among others. More relevant information is as follows: 1. Usage precautions: The tread depth should not be less than 3 millimeters. When the tread depth is below 3 millimeters, there is a significant risk of hydroplaning when driving at high speeds in shallow water. Winter tires with a tread depth of less than 4 millimeters are clearly no longer suitable for winter driving. For safety reasons, new tires should be installed. 2. Abnormal vibrations: Abnormal vibrations during driving may indicate tire damage or other potential damage to the vehicle. This situation could be caused by driving over a curb. Abnormal changes in driving performance, such as severe pulling to the left or right, also indicate this type of issue. In such cases, immediately reduce speed and have the wheels and tires inspected promptly.

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Should the 2021 Buick Excelle use 92 or 95 octane gasoline?

According to the official car manual recommendation, the 2021 Buick Excelle should use 92 octane gasoline. For the 2021 Buick Excelle, besides checking the appropriate gasoline grade in the car manual, you can also find it on the fuel tank cap, which will also indicate the recommended grade. Generally, the gasoline grade can also be determined based on the engine's compression ratio. Cars with an engine compression ratio between 8.6-9.9 should use 92 octane gasoline, while those with a compression ratio between 10.0-11.5 should use 95 octane gasoline. However, with the application of some new technologies, the gasoline grade cannot be solely determined by the compression ratio. A high compression ratio can also be adjusted to use lower-grade gasoline. This is because, besides the compression ratio, other factors such as ignition timing, turbocharging technology, and Atkinson cycle technology also play a role. Generally, the higher the gasoline grade, the higher the octane number and the better the anti-knock performance. 92 octane gasoline contains 92% isooctane and 8% n-heptane, while 95 octane gasoline contains 95% isooctane and 5% n-heptane. If the 2021 Buick Excelle occasionally uses the wrong gasoline grade, simply switch back to the correct grade after consumption. However, long-term use of the wrong gasoline grade can have the following effects: For vehicles recommended to use lower-grade gasoline, using higher-grade gasoline will not cause damage, but the increase in octane number will change the fuel's ignition point, leading to delayed combustion in the engine. This means both the engine's power output and thermal efficiency will decrease, resulting in poorer performance in practical feedback. For vehicles recommended to use higher-grade gasoline, using lower-grade gasoline can cause engine knocking. Because the octane number is too low, the gasoline's ignition point decreases and may ignite prematurely during the compression stroke. If combustion occurs before the spark plug ignites during the compression stroke, resistance will arise during the upward stroke. This resistance makes the engine run very unstably. If the knocking is imperceptible, it only increases noise without obvious damage to the engine. However, noticeable knocking indicates severe engine conditions, where vibrations not only affect driving stability but also cause abnormal wear on pistons and cylinders, and in severe cases, cylinder scoring.

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What Causes the Sides of a Mercedes Engine Hood to Become Hot?

Mercedes engine hood sides becoming hot may be due to engine overheating. Reasons for engine overheating: Insufficient coolant: Prolonged water circulation during engine operation can gradually deplete the coolant in the engine's cooling system, leading to a lack of water in the radiator. If the owner fails to promptly inspect and replenish the coolant, this can easily cause the engine to overheat. Radiator leakage: Broken or improperly connected radiator hoses can cause leaks, obstructing water circulation and, in severe cases, leading to the engine "boiling over." Cooling fan malfunction: A damaged cooling fan or a short circuit in the wiring can prevent the fan from operating or cause it to rotate slowly, preventing the engine's heat from dissipating and naturally raising the engine temperature. Thermostat failure: The thermostat controls the flow path of the coolant. If it becomes stuck or fails, the engine's large and small circulation cycles will be affected, preventing the engine's heat from being effectively dissipated. Water pump failure: If the water pump malfunctions, the water that conducts heat away from the engine cannot circulate and renew in time. As a result, the water temperature will rise rapidly after the engine starts, and the water temperature warning light on the dashboard will illuminate. Exhaust issues: A blocked catalytic converter or a broken pipe can obstruct engine exhaust, leading to engine overheating. Solutions: Idle the car without turning off the engine, open the hood, turn on the heater to dissipate heat as quickly as possible, and if possible, park the car in a shaded area. Check the radiator hoses for leaks and then inspect the coolant level. If no coolant is available in the car, mineral water can be used as a temporary substitute, but it should be replaced with new coolant afterward. Do not add coolant immediately. As physics teaches, heat causes expansion and cold causes contraction. Boiling water in a sealed container generates pressure. If the radiator cap is opened immediately after the water boils, the internal pressure can cause the boiling water to spray out, potentially causing burns.

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What is the working principle of BYD's DM-i Super Hybrid?

DM-i Super Hybrid is based on a high-capacity battery and a high-power motor, with the vehicle being driven by the high-power motor during operation. The core component of BYD's DM-i Super Hybrid technology is the newly developed Xiaoyun plug-in hybrid-specific engine by BYD, which comes in two different versions—the 1.5L engine is mainly used in the Qin PLUS and Song PLUS, while the 1.5T turbocharged engine is used in the larger Tang DM-i model. The DM-i Super Hybrid is introduced as follows: 1. DM-i Super Hybrid models also include two key components: the EHS dual motor and the DM-i Super Hybrid-specific Blade Battery, along with a series of vehicle control systems, engine control systems, motor control systems, and battery management systems, collectively forming the Super Hybrid system. Most importantly, these core components and key technologies are entirely independently developed by BYD. 2. Power: The high-capacity, high-power battery can also support the efficient power system, keeping it operating in the high-efficiency zone for extended periods. Speaking of the world's most efficient power system equipped in the DM-i Super Hybrid, it features the Xiaoyun plug-in hybrid-specific 1.5L high-efficiency engine with a thermal efficiency of 43.04%, and the Xiaoyun plug-in hybrid-specific turbocharged 1.5Ti high-efficiency engine with a thermal efficiency of up to 40%.

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What maintenance items are included for the Mercedes-Benz B7?

Mercedes-Benz maintenance B7 item indicates that the current maintenance is due, and specific maintenance items need to be checked at the 4S dealership based on the mileage. Below are the relevant introductions to the maintenance items: 1. Oil filter: The replacement of engine oil and oil filter is primarily for the maintenance of the lubrication system. The main function of the lubrication system is to effectively lubricate various components of the car engine to prevent excessive wear. The oil filter's function is to remove various impurities from the engine oil to ensure the normal operation of the lubrication system. The oil filter should be replaced along with the engine oil during an oil change. Under normal circumstances, the car should be serviced every 5000KM. 2. Air filter: The air filter's role is to filter the air before it enters the cylinder, removing impurities, dust, sand, and other foreign particles. The cleaning and maintenance of the air filter depend on the usage environment. The gasoline filter is generally replaced after driving 20,000-25,000KM.

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How long in advance should traffic violation points be handled before the driver's license cycle ends?

What is the reason for the Honda CR-V air conditioning not working?

What is the model of the original tires on the BMW 325?

Should the 2021 Buick Excelle use 92 or 95 octane gasoline?

What Causes the Sides of a Mercedes Engine Hood to Become Hot?

What is the working principle of BYD's DM-i Super Hybrid?

What maintenance items are included for the Mercedes-Benz B7?

What is the repair method for the falling ceiling fabric of Peugeot 307?

Is the Abnormal Noise in Mercedes-Benz a Common Phenomenon?

What is the engine model of the Mercedes-Benz E300L?

Which Generation is the 2020 Golf?