What should be paid attention to when passing the school section in Subject 3?

Can Automatic Transmission Vehicles Coast in Neutral?

Automatic transmission vehicles should not coast in neutral. Here are specific fuel-saving methods for driving automatic transmission cars: 1. Utilize coasting: This does not refer to coasting in neutral. When driving an automatic transmission vehicle, do not shift to "N" for coasting. Instead, take advantage of the vehicle's momentum by releasing the accelerator pedal to let the car coast, which can save some fuel. 2. Gentle starts: Since the engine is cold, and components like the water temperature are not yet at normal operating conditions, fuel consumption will be higher. After starting the car, let it warm up for about a minute. 3. Anticipate traffic lights: If you cannot pass through, release the accelerator earlier to control your speed and avoid sudden braking, which can save more than 30% of fuel.

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Where are Borgward car engines produced?

Borgward car engines are produced at the intelligent factory in Miyun, Beijing, utilizing German technology, and are classified as domestically manufactured engines. The Borgward BX7 model is equipped with the 4G20TI1 engine. The mid-to-low efficiency version of this engine delivers a maximum power of 148kW and a maximum torque of 300Nm, while the high-power version offers a maximum power of 165kW and a maximum torque of 300Nm. For daily maintenance of Borgward car engines, the following methods can be employed: Use lubricating oil of the appropriate quality grade. For gasoline engines, select SD--SF grade gasoline engine oil based on the additional equipment of the intake and exhaust systems and usage conditions. For diesel engines, choose CB--CD grade diesel engine oil according to mechanical load, with the selection standard not lower than the manufacturer's specified requirements. Regularly change the engine oil and oil filter. The quality of any grade of lubricating oil will deteriorate during use. After a certain mileage, its performance will degrade, leading to various engine issues. To prevent malfunctions, change the oil periodically based on usage conditions and maintain an appropriate oil level. When oil passes through the fine pores of the filter, solid particles and viscous substances in the oil accumulate in the filter. If the filter becomes clogged and oil cannot pass through the filter element, the filter element may burst or the safety valve may open, allowing oil to bypass through the bypass valve and carry contaminants back to the lubrication areas, accelerating engine wear and increasing internal contamination. Regularly clean the crankcase. During engine operation, high-pressure unburned gases, acids, moisture, sulfur, and nitrogen oxides from the combustion chamber enter the crankcase through the gap between the piston rings and cylinder walls, mixing with metal particles from component wear to form sludge. In small amounts, the sludge remains suspended in the oil, but in large amounts, it precipitates, clogging filters and oil passages, making engine lubrication difficult and causing wear. Periodically use a radiator cleaner to flush the radiator. Removing rust and scale deposits not only ensures proper engine operation but also extends the overall lifespan of the radiator and engine.

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What does ASR mean in a car?

ASR stands for Acceleration-Slip-Regulation, also known as the Traction Control System. It is an active safety device in automobiles designed to prevent wheel slip during acceleration, especially in high-power vehicles, thereby maintaining directional stability. Functions of ASR: Prevents drive wheel slip during vehicle start-up and acceleration; Prevents drive wheel spin on uneven road surfaces or during turns; Enhances traction and maintains driving stability, keeping the slip ratio within 10%-20%. ASR is a slip control system developed after ABS, serving as an advanced and crucial supplement to ABS functionality. The electronic control unit and brake pressure regulator in ASR can be shared with ABS, hence ASR and ABS are often integrated to form a combined Anti-lock Braking and Traction Control (ABS/ASR) system. ASR and ABS share many operational principles, which is why they are frequently combined into an ABS/ASR system. This system mainly consists of wheel speed sensors, ABS/ASR ECU, ABS actuator, ASR actuator, sub-throttle control stepper motor, and main/sub-throttle position sensors. The principle of ASR: When drive wheels slip, ASR detects this by comparing the rotational speeds of the wheels and automatically reduces throttle intake and engine speed to decrease power output, thereby braking the slipping drive wheels.

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What Causes Steering Wheel Shaking When Braking?

Here are the specific reasons for steering wheel shaking when braking: 1. Wheel balancing issue: A car wheel consists of a tire and a rim. When there's a problem with the wheel balancing, it means the wheel is not in a balanced state during high-speed driving. If the balancing data is incorrect, the wheel's rotation center will shift, causing the wheel to vibrate, which in turn affects the steering wheel. 2. Rim problem: If the car's rim has previously suffered an impact during driving, causing deformation. Due to the deformed rim, the wheel will vibrate while driving, leading to steering wheel shaking. 3. Chassis component issue: This usually occurs in vehicles with poor post-accident repairs. Due to the impact during the accident affecting chassis components, steering wheel shaking may also occur.

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What is a Throttle Body?

A throttle body is a controllable valve that regulates the amount of air entering the engine. After the air enters the intake manifold, it mixes with gasoline to form a combustible mixture, which then burns to produce power. Below are the specific steps for installing a throttle body: 1. Release the pedal: Turn off the ignition switch and wait at least 10 seconds. Fully release the accelerator pedal, then turn the ignition switch to the ON position and wait for 3 seconds. 2. Repeat the operation: Within 5 seconds, quickly repeat the following operation 5 times—fully depress the accelerator pedal and then fully release it. 3. Depress the pedal: Wait for 7 seconds, then fully depress the accelerator pedal and hold it for about 20 seconds until the MIL stops blinking and remains lit. Within 3 seconds after the MIL light turns on, fully release the accelerator pedal. 4. Idle operation: Start the engine and let it idle for a while. Allow the engine to idle for more than 20 seconds, then rev the engine two or three times to confirm that both the idle speed and ignition timing meet the specified requirements.

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What does 91V on a tire mean?

91V on a tire refers to the load index and speed rating. 91 represents the load index, indicating a maximum load capacity of 615Kg per tire, while V signifies that the tire's maximum allowable speed is 240km/h. Below are specific details about car tire specifications: 1. Specification model representation: Tires are crucial components of vehicles, with various specification models suitable for different vehicle types. The specification model identification is typically found on the tire sidewall, represented by a series of alphanumeric characters corresponding to the tire's tread width, aspect ratio, type, rim size, load index, and speed rating. 2. Speed rating: Based on different maximum speed capabilities, tire speed ratings are categorized into various levels from A-Z, with level A further divided into eight sub-levels from A1-A8. The later the letter representing the tire speed rating appears in the alphabet, the better the tire's performance.

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What should be paid attention to when passing the school section in Subject 3?

Can Automatic Transmission Vehicles Coast in Neutral?

Where are Borgward car engines produced?

What does ASR mean in a car?

What Causes Steering Wheel Shaking When Braking?

What is a Throttle Body?

What does 91V on a tire mean?

What engine is equipped in the Bestune X40?

How to Replace the Battery in the Damai X5 Key?

What does the car rear button mean?

What are the differences between halogen headlights and LED headlights?