Where is the license plate Ji T from?

What is the difference between CVT and ECVT?

Here is a related introduction to the differences between CVT and ECVT: 1. Structural differences: The structure of CVT mainly consists of two sets of pulleys (drive pulley, driven pulley), a transmission belt (steel belt), oil pump, torque converter, actuators (valve body, oil circuit), sensors, control computer, etc. The composition is relatively complex, and the steel belt has limited torque capacity, so it is generally only used in small vehicles as a transmission system. The structure of ECVT is much simpler. It does not have complex mechanisms such as clutches, torque converters, or gear shafts found in traditional transmission systems. It is composed of a set of planetary gears and two motors. 2. Different working principles: In CVT technology, Motor 2 is responsible for starting, low-speed driving, and hybrid driving; Motor 1 is mainly responsible for starting the engine and generating electricity. The engine does not directly drive the wheels in most cases. The engine is connected to the star carrier, Motor 1 is connected to the sun gear, Motor 2 is connected to the outer ring gear, and the outer ring gear is connected to the power output shaft. ECVT not only transmits power but also couples the energy of the engine and the motor to achieve power output. Therefore, it is actually a power combination system, specifically designed as a power distribution mechanism for hybrid vehicles. 3. Different power solutions: ECVT can also achieve continuously variable transmission by integrating motors. This transmission structure includes a planetary gear set and two motors, without a clutch or torque converter. It couples the power output of the engine and provides the power output of the motor through the motors. ECVT is not actually a transmission element but a power element, more accurately described as a power distributor. CVT refers to the ordinary mechanical continuously variable transmission.

7

4

Share

What is the standard air flow rate at idle?

The air flow signal data at idle is approximately 2.5g/s. Below is relevant information about idle air flow: 1. If the air flow at idle is less than 2.0g/s, it indicates an air leak in the intake system. If it exceeds 4.0g/s, it suggests additional load on the engine. The normal air flow value varies for each engine, with larger displacement engines having higher air flow values. 2. The air flow signal is one of the primary signals used by the engine control unit (ECU) to regulate the air-fuel mixture concentration. If the intake air volume increases, the ECU increases the fuel injection accordingly, and vice versa. 3. The air flow sensor signal is a key basis for controlling the air-fuel ratio. Therefore, an infrared exhaust gas analyzer can be used to measure the exhaust components during engine idle and stable operation at 2000r/min. If the readings deviate significantly from standard values, it is likely due to poor performance of the air flow sensor.

8

0

Share

What Causes the Noise When Raising and Lowering the Car Window?

The possible reasons for noise when raising and lowering the car window include: 1. Aging of the window seal: Aging window seals can increase friction, leading to noise during window operation. Older cars are particularly prone to this issue. 2. Dirt in the gap between the window glass and the seal: You can raise the window and rinse the gap with water, then dry it before lowering the window. Use a chopstick or an old card wrapped in a towel or cloth to clean the gap. After cleaning, dry it thoroughly and apply a small amount of lubricant. 3. Dirty window glass tracks or faulty lift motor: Cleaning the glass tracks can be done by the owner if they have some mechanical skills, as it involves removing the door panel and using cleaner and lubricant on the tracks. Alternatively, a repair shop can handle this. However, issues like seal aging or lift motor failure can only be addressed by a professional repair shop.

11

5

Share

What Does SAE Mean?

SAE is the abbreviation for the Society of Automotive Engineers in the United States, referring to the viscosity grade classification of gear oil. Below are relevant introductions about SAE: 1. Gear oil can be divided into single-grade viscosity type and multi-grade viscosity all-weather type. The single-grade viscosity type can be further categorized into high-temperature type and low-temperature type. 2. High-temperature type labels are similar to SAE90 and SAE140. The number following SAE indicates the oil viscosity at 100℃. The larger the number, the higher the oil viscosity. 3. Low-temperature type labels are similar to SAE75W. The 'W' stands for winter (low-temperature type), and 75 represents viscosity. The smaller the number, the better the low-temperature performance. 4. Multi-grade viscosity all-weather type labels are similar to SAE80W/90. The number before the slash indicates the low-temperature viscosity performance in winter—the smaller the number, the lower the low-temperature viscosity, resulting in better fluidity and enhanced low-temperature resistance. The number after the slash represents the high-temperature viscosity performance—the larger the number, the higher the high-temperature viscosity, providing better high-temperature resistance.

13

0

Share

How to Maintain Electric Vehicle Batteries?

Maintenance measures and precautions for automotive batteries are as follows: 1. Keep the battery clean and dry at all times, ensuring the vent holes are unobstructed. If oxides appear on the plates or terminals, clean them off and apply a small amount of grease to prevent corrosion. 2. Avoid continuous use of the starter motor. Each use should not exceed 5 seconds, with a rest period of 10-15 seconds between two starts. In severe winter, the battery discharge level should not exceed 25%, and in summer, it should not exceed 50%. 3. Batteries filled with electrolyte should not be left unused for long periods without sufficient charging. Regular charging is necessary; otherwise, it may lead to battery failure. 4. When charging the battery, ensure the voltage is neither too low nor too high. Generally, the standard charging voltage for a 12V battery is within the range of (13.5~14.5)V, and for a 24V battery, it is within (28~29.9)V. 5. The electrolyte level should be (10~15)mm above the plates. If the level is too low, promptly replenish it with distilled water—do not add more electrolyte. If distilled water is unavailable, rainwater or snowmelt can be used as a substitute. Avoid using river water or tap water.

6

4

Share

How Often Should a Major Car Maintenance Be Performed?

Major car maintenance is typically performed every three years or 60,000 kilometers. Additional information about major car maintenance is as follows: 1. Major maintenance primarily involves replacing more parts and fluids. The required inspections include checking all vehicle fluids, such as brake fluid, coolant, power steering fluid, and transmission oil. Additionally, tasks like carbon deposit removal, battery replacement, spark plug replacement, and timing belt replacement are also addressed. For turbocharged engine vehicles, the primary focus is on carbon deposit removal. Excessive carbon deposits can lead to reduced engine power, difficulty starting, increased fuel consumption, and even engine stalling, making it a critical aspect of major maintenance. Battery maintenance is also important, as modern cars are equipped with numerous electronic devices that consume significant battery power. Forgetting to turn off the air conditioning after shutting off the engine can drain the battery, so regular battery checks are essential. 2. Car owners should also develop daily maintenance habits. Daily maintenance includes pre-drive, during-drive, and post-drive checks, summarized as: cleaning, tightening, inspecting, and replenishing. Regular daily maintenance helps keep the vehicle in optimal condition while allowing owners to monitor the technical status of various components, preventing mechanical failures and accidents.

15

3

Share

Where is the license plate Ji T from?

What is the difference between CVT and ECVT?

What is the standard air flow rate at idle?

What Causes the Noise When Raising and Lowering the Car Window?

What Does SAE Mean?

How to Maintain Electric Vehicle Batteries?

How Often Should a Major Car Maintenance Be Performed?

How Often Should Car Brake Discs Be Replaced?

What does SVS on the car dashboard mean?

What is the AC button in a car?

Where is the license plate number Lu V from?