What is Wheel Speed?

Can You Use Windshield Wipers in Snowy Weather?

You can use windshield wipers in snowy weather, but it's essential to remove any ice chunks from the glass beforehand to avoid damaging the wiper motor. Here are some relevant details: 1. Principle: Rubber materials have a specific temperature range for optimal use. If the wipers are frozen under snow and frost for extended periods (low-temperature conditions), it will undoubtedly reduce their lifespan and affect their wiping performance. 2. Precautions: It's important to note that you shouldn't simply lift the wipers upright, as raising them from their original position may cause them to get stuck against the hood. Forcing them could potentially damage the wipers.

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Is it allowed to make a U-turn when the traffic light is red?

If the U-turn signal light is red, you must wait to make a U-turn; otherwise, it will be considered running a red light. According to the "Road Traffic Safety Law," this offense carries a penalty of 6 demerit points and a fine of 200 yuan. If there is no dedicated U-turn signal light, and the gap is marked with a dashed line, the U-turn is not affected by the traffic signal and does not require crossing the pedestrian crossing. However, if the gap is marked with a solid line, the U-turn must cross the pedestrian crossing and is subject to the left-turn signal. Making a U-turn directly under such conditions may result in being photographed or penalized by on-site traffic police. When making a U-turn that requires crossing the pedestrian crossing, yielding to pedestrians is mandatory: If pedestrians are walking on the right side of the crosswalk and have not reached the centerline of the road, vehicles on the left side must slow down and proceed only after ensuring safety. If pedestrians are waiting outside the boundary of the motorized and non-motorized lanes and have not entered the roadway, vehicles should slow down and proceed only after ensuring safety. If pedestrians have crossed the boundary between motorized and non-motorized lanes, failing to stop and yield is a violation and subject to penalties. If pedestrians enter the motorized lane (Lane A) via the crosswalk, vehicles in Lane B must slow down and proceed only after ensuring safety. Failing to stop and yield in Lane A is a violation and subject to penalties. If pedestrians are waiting at the centerline of the road without entering the motorized lane, failing to stop and yield is a violation and subject to penalties. If pedestrians cross the centerline and enter the motorized lane, failing to stop and yield is a violation and subject to penalties. If the road is divided by a green belt and pedestrians are waiting in the central stopping area, vehicles must slow down and proceed only after ensuring safety. Scenarios where U-turns are allowed: If an intersection has a U-turn sign, U-turns are permitted. If there is a dedicated U-turn signal light, follow its instructions. If no signal light exists, make the U-turn without obstructing other vehicles or pedestrians. If an intersection does not explicitly prohibit U-turns or left turns, U-turns are allowed. "No explicit prohibition" means the absence of "No U-turn" or "No left turn" signs and no solid centerline. U-turns are also permitted in yellow grid zones. Yellow grids indicate no-stopping areas but do not prohibit U-turns unless a central barrier is present. If a U-turn signal light is present, follow its instructions—U-turns are allowed only on green. If "No left turn" and "U-turn allowed" signs coexist, U-turns are permitted but left turns are prohibited. Note that "No U-turn" is not equivalent to "No left turn." Precautions when making U-turns at intersections: Check road markings—U-turns are never allowed on solid lines. Proceed to find a suitable location. If a "No left turn" sign is present, U-turns are also prohibited, as they inherently involve a left turn. U-turns must be made from the innermost left-turn lane. U-turns from the second left-turn lane are prohibited. Always yield to through traffic before making a U-turn. Failing to do so makes you fully liable for any accidents. Near stop lines, lanes often have guiding arrows. The leftmost lane may not always be for left turns—some have straight arrows, which prohibit U-turns even without explicit signs.

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How to Explain Ignition Advance Angle?

From the moment of ignition until the piston reaches the top dead center of compression, the angle through which the crankshaft rotates during this period is called the ignition advance angle. The ignition advance angle that enables the engine to achieve optimal power, fuel economy, and emissions is referred to as the optimal ignition advance angle. Functions of the ignition advance angle: 1. Increase output power: If ignition occurs exactly when the piston reaches the top dead center, the air-fuel mixture begins to burn as the piston has already started moving downward, leading to a decrease in engine power. Therefore, advancing the ignition ensures that the energy generated by the combustible mixture is effectively utilized, enhancing the engine's output power. 2. Improve mechanical efficiency: An appropriate ignition advance angle allows the engine to perform the maximum mechanical work per cycle.

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When Did the Vehicle Purchase Tax Get Halved?

From October 1, 2015, to December 31, 2016, a preferential policy was implemented to halve the vehicle purchase tax for passenger vehicles with a displacement of 1.6 liters or below. Below is the relevant information: 1. Calculation Method: When the vehicle purchase tax was halved in 2016, the tax payable was calculated as 100,000 yuan ÷ (1 + 17%) × 5% = 4,274.50 yuan (the 100,000 yuan includes 17% VAT, and the vehicle purchase tax is calculated based on the price excluding VAT). In 2017, when the tax was reduced to 7.5% according to the "Notice," the tax payable was 100,000 yuan ÷ (1 + 17%) × 7.5% = 6,410.26 yuan. 2. Relevant Laws: In the "Notice," the Ministry of Finance clearly stipulated that the purchase date of passenger vehicles is determined based on the issuance date of valid documents such as the "Unified Invoice for Motor Vehicle Sales" or the "Special Customs Duty Payment Certificate." The vehicle purchase tax policy for new energy vehicles follows the "Announcement on Exempting New Energy Vehicles from Vehicle Purchase Tax" (Announcement No. 53 of 2014 by the Ministry of Finance, State Taxation Administration, and Ministry of Industry and Information Technology).

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Can You Start the Engine in P Gear?

p gear can directly start the engine. In fact, the transmission of an automatic car is not that fragile, and it can be started in either P gear or N gear. Additional information: 1. The reason for the car rolling after parking in P gear: P gear is the most common gear in automatic transmission models, usually located at the frontmost position of the gear shift console, in front of the R gear, designed to lock the axle when the car is stationary on a slope. Both P gear and N gear are neutral gears, meaning the power generated at the engine input end cannot be transmitted to the transmission output end. This is why drivers often experience a slight slide after parking in P gear on uneven surfaces. 2. Mechanical braking device: Since P gear is equipped with an additional mechanical braking device, the vehicle will no longer move once the gear grooves in the transmission are locked by the pawl. N gear itself does not have any wheel-locking mechanism, requiring the use of the handbrake or brake pedal to stop the wheels. Additionally, when in N gear, all gears in the automatic transmission can rotate freely; but when in P gear, the output gears of the transmission are locked and stationary.

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What Are the Types of Car Window Films?

Car window films can be categorized into dyed films, coated and composite process films, and vacuum thermal evaporation films. Below is an expanded introduction to each: 1. Dyed films: Currently, most dyed car films on the market use deep-dyeing technology, which involves adding heat-absorbing agents through deep dyeing to absorb infrared rays from sunlight and achieve heat insulation. However, since they also absorb visible light, the visible light transmittance is insufficient, and the clarity is poor due to inherent process limitations. Another major drawback of these films is that their heat insulation function degrades quickly, and they are prone to fading. They are relatively inexpensive. 2. Coated and composite process films: These films primarily serve to block intense sunlight. They were among the earliest types of car films produced and generally lack heat insulation properties. They were initially called sun paper or tea paper. 3. Vacuum thermal evaporation films: These films employ vacuum thermal evaporation technology, where an aluminum layer is evaporated onto the base material to achieve heat insulation. This is commonly referred to as the metal film category, offering relatively long-lasting heat insulation. However, the downside is lower clarity, which affects visual comfort, and another significant drawback is their high reflectivity.

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What is Wheel Speed?

Can You Use Windshield Wipers in Snowy Weather?

Is it allowed to make a U-turn when the traffic light is red?

How to Explain Ignition Advance Angle?

When Did the Vehicle Purchase Tax Get Halved?

Can You Start the Engine in P Gear?

What Are the Types of Car Window Films?

Car Shaking with Abnormal Noises?

Why Does a Car Make Abnormal Noises When Turning?

What is the Multibeam LED Headlight?

What is the maximum speed during a car's break-in period?