How to Walk Around the Vehicle in the Subject 3 Driving Test?

Why does the cylinder extend but not retract?

Cylinder extending but not retracting is generally caused by spark plug failure, excessive fuel injection, or insufficient cylinder pressure. It is recommended to visit a 4S shop for inspection and troubleshooting as soon as possible. Below is relevant information about automotive engine cylinders: 1. Classification: Engine cylinders can be categorized based on their arrangement into L-type in-line, V-type, H-type horizontally opposed engines, and W12/16-type engines. Engine displacement equals the sum of the working volumes of all cylinders. Increasing the number of cylinders can increase engine displacement, enhance engine output power, and also make the engine run more smoothly, reducing vibration and noise. 2. Number of cylinders: Common cylinder counts for automotive engines include 3, 4, 5, 6, 8, 10, and 12 cylinders, with 4-cylinder and 6-cylinder engines being the most common, and 4-cylinder engines being the most widely used. Nowadays, engines with displacements below 1.3 liters often use 3 cylinders, 1.5 to 2.5 liters typically use 4 cylinders, around 3 liters usually have 6 cylinders, around 4 liters have 8 cylinders, and those above 5.5 liters use 12-cylinder engines.

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What does the lock on an off-road vehicle mean?

Off-road vehicle lock refers to the differential lock. The following are introductions to three types of differential locks: 1. Central differential lock: It can make the front and rear wheels rotate at the same speed when the wheels slip, but this is limited to minor road conditions. In cases of cross-axle or artillery shell pits, the central differential lock is not very effective. 2. Rear axle differential lock: It can make the rear wheels rotate at the same speed as the front axle. Specifically, when an off-road vehicle is driving on a cross-axle or artillery shell pit and only one wheel has traction while the other is suspended, the vehicle still has sufficient power to move forward. This lock is therefore called the soul of an off-road vehicle. 3. Front axle differential lock: When one side of the vehicle is suspended, the front axle differential lock can ensure that all wheels receive the same power, hence it is referred to as the life-saving component of an off-road vehicle.

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What is the displacement of a 1.5t turbocharged engine?

1.5t turbocharged engine is equivalent to 2.0L displacement. Here's an introduction about automotive displacement: Introduction to automotive displacement: The space volume that the piston moves from top dead center to bottom dead center is called cylinder displacement; If an engine has multiple cylinders, the sum of all cylinders' working volumes is called engine displacement. It is generally expressed in liters (L). Engine displacement is one of the most important structural parameters, which represents the size of the engine better than bore diameter and number of cylinders. Many indicators of the engine are closely related to displacement. Displacement classification: The classification of Chinese passenger cars is determined by the size of displacement. Mini cars have a displacement ≤1.0L; Compact cars have a displacement between 1.0-1.6L; Mid-size cars have a displacement between 1.6-2.5L; Executive cars have a displacement between 2.5-4.0L; Luxury cars have a displacement >4.0L.

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What are the precautions for using cars in winter?

Precautions for using cars in winter include replacing winter tires, adding or replacing antifreeze, and selecting suitable engine oil. The specific precautions are as follows: Replacing winter tires: As the temperature drops, the surface of the tires becomes stiff, which can affect the grip performance of the tires. In some cases, this may lead to slipping, especially in northeastern regions where rain and snow are frequent, making road conditions worse. Additionally, due to the effect of thermal expansion and contraction, tire pressure will also decrease. Adding or replacing antifreeze: Antifreeze has two main functions. In summer, when temperatures are higher, antifreeze ensures the normal operation of the car's cooling system, preventing the engine from overheating. In winter, it prevents excessively low temperatures from freezing and damaging engine cylinders and other components. Selecting suitable engine oil: Similarly, due to the drop in temperature, if the cold-start engine oil is too thick in winter, it can affect car starting and increase engine wear. On the other hand, if the hot engine oil is too thin, it can reduce lubrication and sealing performance.

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Which Year's Vehicles Are National IV Standard?

Gasoline vehicles sold between July 1, 2010, and December 31, 2017, are basically National IV standard. The relevant introduction about National IV standard is as follows: Introduction to National IV Emission Standard: Starting from May 1, 2018, the application for National III products was stopped, and only applications for National IV products were accepted. After July 1, 2018, no announcements for National III vehicle models were issued. When applying for the announcement of National IV vehicle models, new specifications and models should be used to distinguish them from National III vehicle models. Since the technical route has been specified in the new standard, National IV vehicle models no longer provide separate recommended technical solutions, and the standard requirements shall prevail. National IV Emission Standard Applicable Vehicle Models: Motorcycles and mopeds are classified according to maximum design speed and displacement. Among them, motorcycles refer to those powered by spark-ignition engines with a maximum design speed greater than 50 km/h or a displacement greater than 50 mL, as well as those powered by compression-ignition (diesel) engines with a maximum design speed greater than 50 km/h or a displacement greater than 50 mL for three-wheeled motorcycles.

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What does 20A mean for a battery?

20A stands for 20Ah, which represents the value obtained under the standard capacity calculation method for lead-acid batteries. The battery should be frequently used and charged: The battery should be frequently used and charged to maintain a saturated state, which extends its service life; do not wait until the battery is depleted before charging, as this will reduce the battery's lifespan by one-third. Also, avoid overcharging, as prolonged use of the charger can lead to aging components and potential leakage. Prevent overcharging of the battery:

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How to Walk Around the Vehicle in the Subject 3 Driving Test?

Why does the cylinder extend but not retract?

What does the lock on an off-road vehicle mean?

What is the displacement of a 1.5t turbocharged engine?

What are the precautions for using cars in winter?

Which Year's Vehicles Are National IV Standard?

What does 20A mean for a battery?

Does idling with the AC on harm a car?

What is the Principle of Automatic Transmission?

How Many Rolls-Royce Cars Are There in China?

Will the engine malfunction light come on if the oxygen sensor is broken?