What are the test items for automatic transmission vehicles?

Is the Subaru CVT using a steel belt or chain drive?

Subaru CVT uses a chain drive. The structural differences between CVT using chains and steel belts are as follows: 1. Chain: The chain does not directly contact the pulley but transmits torque by compressing the intermediate rocker pins. Structurally, the chain consists of two sets of circular steel plates and tension plates. Each set of steel belts is composed of 12 high-tension thin steel plates stacked together. High-strength steel is inserted between each set of steel plates to form rocker pins for connection, with a tensile strength of up to 2000 MPa. This chain structure can only transmit power by "pulling." The driving pulley compresses the chain's "rocker pins," creating static friction to drive the chain and transmit torque. 2. Steel belt: The CVT steel belt is supported by two embedded steel belts as the base, with hundreds of steel plates clamped onto the metal belt. This push-plate structure can only transmit power by "pushing," utilizing the hardness of the material between the plates to form thrust. The push plates undergo minimal deformation under external force. During power transmission, the driving pulley tightly presses against the entire side of the steel belt, creating static friction, and the driving pulley pushes the driven pulley to rotate via the steel belt.

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What is the purpose of a car stabilizer bar?

Detailed introduction to car stabilizer bars is as follows: 1. Front lower control arm stabilizer bar (original equipment essential component): Designed and installed between the front axle and front wheels, its main function is to control the camber angle of the front wheels. 2. Toe-in stabilizer bar (original equipment essential component): Designed and installed on the lower control arms of both front wheels, it controls the overall symmetry of the front wheels, primarily responsible for the caster angle of the front wheels and maintaining the tracking ability of the steering wheels. 3. Front shock tower top stabilizer bar (optional component): Designed and installed at the top of the front shock towers, its main function is to enhance the rigidity between the engine compartment and the front body, counteract frame deformation caused by centrifugal lateral torque, improve the vehicle's cornering ability, increase cornering speed, and reduce the body roll angle induced by centrifugal force. 4. Front crossmember stabilizer bar (optional component): Designed and installed at the connection point between the front axle and the chassis frame, its main function is to strengthen the connection between the front crossmember and the chassis, reduce front axle displacement deformation caused by centrifugal force and body twisting, with its primary role also being to enhance cornering performance.

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Is it mandatory to use 95 octane gasoline for the Volkswagen Tiguan L?

The Volkswagen Tiguan L must use 95 octane gasoline, as this fuel grade is officially recommended in the vehicle's user manual. In addition to checking the appropriate gasoline grade in the user manual, the recommended octane rating for the Volkswagen Tiguan L can also be found on the fuel tank cap, which will be clearly marked. Typically, the fuel grade can also be determined based on the engine's compression ratio. Vehicles with a 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. For higher compression ratios, 98 octane gasoline is recommended. However, with the application of new technologies, the compression ratio alone cannot determine the required gasoline grade, as high-compression engines can also be tuned to use lower-octane fuel. This is because factors other than compression ratio, such as ignition timing, turbocharging technology, and Atkinson cycle technology, also play a role. Generally, the higher the gasoline octane rating, 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 Volkswagen Tiguan L occasionally uses the wrong gasoline grade, simply switching back to the correct grade after consumption is sufficient. However, prolonged use of the wrong gasoline grade can have the following effects: For vehicles recommended to use lower-octane gasoline, using a higher octane fuel will not cause damage, but the increased octane number may alter the fuel's ignition point, leading to delayed combustion in the engine. This results in reduced engine power and thermal efficiency, manifesting as poorer performance. For vehicles recommended to use higher-octane gasoline, using a lower octane fuel can cause engine knocking. Due to the significantly lower octane number, the gasoline's ignition point decreases, causing premature ignition during the compression stroke. If combustion occurs before the spark plug fires, resistance will develop during the upward stroke. This resistance makes the engine run very unstably. If the knocking is mild, it may only increase noise without significant engine damage. However, noticeable knocking indicates severe engine conditions, affecting not only driving stability but also causing abnormal wear on pistons and cylinders, potentially leading to cylinder scoring in severe cases.

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What are the symptoms of a broken clutch in a car?

Signs of a damaged car clutch plate: 1. The clutch pedal becomes higher, requiring it to be fully depressed to engage the gear. Previously, the car would move when the pedal was lifted by 1 cm, but now it requires lifting by 2 cm, indicating that the clutch plate is worn thin and needs to be lifted higher for engagement. 2. Reduced vehicle power. When the engine shows no abnormalities but the car lacks power during startup or climbing, with high engine RPM but insufficient power, it suggests clutch slippage. 3. During high-speed driving, sudden acceleration for overtaking is sluggish. Even when the throttle is pressed, it feels like the engine is revving without the car accelerating, another sign of clutch slippage. In other words, while the engine previously needed 1800 RPM to reach 80 km/h, it now requires 2000 RPM. 4. Another scenario is an uneven clutch surface, which also requires replacement regardless of thickness. The symptoms include severe shaking during startup and at half-clutch, indicating an uneven clutch surface, often due to poor-quality clutch plates. 5. Sudden increase in fuel consumption. While there are many reasons for increased fuel consumption, if any of the above four symptoms are accompanied by higher fuel consumption, it is likely due to a faulty clutch plate.

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Should Volkswagen Golf Use 92 or 95 Octane Gasoline?

According to the official vehicle manual recommendation, Volkswagen Golf should use 92 octane gasoline. In addition to checking the suitable gasoline grade in the vehicle manual, Volkswagen Golf owners can also find this information on the fuel tank cap, which will be clearly marked. Generally, the gasoline grade can also be determined based on the engine's compression ratio. Vehicles 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 new technologies, the compression ratio alone cannot determine the appropriate gasoline grade, as high compression ratio engines can also be tuned to use lower octane 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 Volkswagen Golf occasionally uses the wrong gasoline grade, simply switch back to the correct grade after the current tank is used up. However, long-term use of the wrong gasoline grade can have the following effects: For vehicles recommended to use lower octane gasoline, using higher octane 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. For vehicles recommended to use higher octane gasoline, using lower octane gasoline can cause engine knocking. Because the octane number is too low, the gasoline will ignite prematurely during the compression stroke. If combustion occurs before the spark plug fires, resistance will arise during the upward stroke. This resistance will make the engine run very unstably. If the knocking is mild, it may only increase noise without significant damage to the engine. However, if the knocking is severe, it indicates serious engine conditions, affecting not only driving stability but also causing abnormal wear on pistons and cylinders, and in severe cases, cylinder scoring.

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Where is the Bora engine number located?

The Bora engine number is located on the front side wall of the engine block, below the front windshield near the wiper. There is a small horizontal strip, and the engine number is found below the barcode on this strip. The engine model is an identification code assigned by the engine manufacturer in accordance with relevant regulations, industry or corporate practices, and the attributes of the engine. It is used to indicate information such as the manufacturer, specifications, performance, features, technology, purpose, and production batch of the engine, including fuel type, number of cylinders, displacement, and static brake power. The engine model is an identification code assigned by the engine manufacturer in accordance with relevant regulations, industry or corporate practices, and the attributes of the engine. It is used to indicate information such as the manufacturer, specifications, performance, features, technology, purpose, and production batch of the engine, including fuel type, number of cylinders, displacement, and static brake power. Engines installed in passenger cars or multi-purpose vehicles are required to display the professional manufacturer, model, and production number of the engine. It is important to note that the engine number is not the same as the engine model. The engine model refers to the specifications and size of the engine within the manufacturer's product line, and multiple engines can share the same model. The engine number, however, refers to the production serial number of the engine. Each engine has a unique number, and no two engines share the same engine number. Composition of the vehicle engine number: Front section: Includes product series code, generation symbol, and regional or corporate code. Manufacturers may choose appropriate letters as needed, but these must be approved and recorded by the industry standardization unit. Middle section: Consists of symbols for the number of cylinders, cylinder arrangement, stroke, and cylinder diameter. Rear section: Composed of symbols for structural features and usage characteristics. Tail section: Distinguishing symbol. When differentiation is needed due to improvements or other reasons within the same product series, manufacturers may select appropriate symbols. The rear and tail sections can be separated by a hyphen (-).

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What are the test items for automatic transmission vehicles?

Is the Subaru CVT using a steel belt or chain drive?

What is the purpose of a car stabilizer bar?

Is it mandatory to use 95 octane gasoline for the Volkswagen Tiguan L?

What are the symptoms of a broken clutch in a car?

Should Volkswagen Golf Use 92 or 95 Octane Gasoline?

Where is the Bora engine number located?

Which is Larger Between Compact and Subcompact SUVs?

Can You Apply the Brake in the S-Curve Section of Subject 2?

How much over the speed limit is driving 80 mph in a 70 mph zone?

What Does Mild Hybrid Power in Cars Mean?