What is the reason for a car automatically refueling?

How Much Difference Between MIIT Comprehensive Fuel Consumption and Actual Fuel Consumption?

The difference between MIIT comprehensive fuel consumption and actual fuel consumption does not have a fixed value. This is because MIIT fuel consumption is derived from very ideal road driving conditions, while actual fuel consumption may vary due to various influencing factors. Here are some methods to reduce fuel consumption: 1. Regularly check the tire system: Insufficient tire pressure increases friction between the tires and the ground, leading to higher fuel consumption. Therefore, it's important to frequently check tire pressure, as different vehicle models and tires have different pressure standards. Severely worn tires can cause slippage and increase fuel consumption, so they should be replaced when necessary. 2. Regularly inspect the braking system: Some vehicles may experience slight brake drag, which increases the vehicle's load during driving and raises fuel consumption. Regular checks are essential. 3. Perform regular maintenance and replace parts: Air filters, gasoline filters, and oil filters should be replaced every 5,000 kilometers or more, as a clogged air filter reduces air intake, leading to incomplete gasoline combustion and lower fuel efficiency. Wear on the clutch plate and clutch pressure plate, as well as prolonged use of spark plugs, can also result in increased fuel consumption, so these parts should be replaced periodically.

2

0

Share

Will the Fuel Tank of a Flooded Car Get Water Inside?

The fuel tank of a flooded car generally does not get water inside, whether the water has just submerged the wheels or the entire body. This is because the fuel tank has excellent sealing and a certain degree of pressure resistance. Even gasoline fumes are not easy to permeate out, let alone water. However, there are still some oversights that can cause water to enter the fuel tank. Fuel-related issues: Due to fuel quality and storage problems, accumulated moisture in the fuel itself can lead to water ingress. Air entering during refueling: Air that enters the fuel tank during refueling can condense into water. Whether the fuel tank cap is tightly closed: During car washing or rain, water can seep into the fuel tank through an improperly closed fuel tank cap. Hazards of water in the fuel tank: Since water is denser than oil, it will gradually separate and settle, accumulating in the bends of the fuel lines or the filter. Besides corroding the fuel lines and causing rust, it can also disrupt the normal fuel supply of the fuel system. Under normal temperatures, fuel can dissolve some moisture, but as the temperature drops, the solubility of water decreases accordingly. Therefore, issues caused by water in the fuel tank become more pronounced in winter. When the temperature falls below the freezing point of water, it can freeze and cause fuel line blockages, rendering the engine inoperable.

2

5

Share

Is It Necessary to Install an Electronic Throttle Response Controller?

Whether to install an electronic throttle response controller depends on the owner's usage needs. The electronic throttle response controller collects signals from the throttle pedal position sensor, reprocesses the throttle signal, and sends it to the ECU, thereby improving engine response performance. This enhances throttle sensitivity, accelerates starting speed, improves the vehicle's instantaneous acceleration performance, avoids sudden forward surges, and prevents engine carbon buildup. Characteristics of electronic throttle and cable throttle: The cable throttle system is simple and directly controlled, with a 1:1 ratio between the throttle pedal and throttle valve opening. In contrast, the electronic throttle system means the throttle pedal only reflects the driver's intention, while the final throttle valve control is handed over to the ECU. Working principle of the electronic throttle response controller: The so-called 'acceleration' is mainly achieved by increasing throttle response sensitivity, which amplifies the input throttle signal by 50%. At any time, the last 33% of the throttle signal is no longer useful. When the driver presses the pedal to 66%, the controller's output is already at full throttle, thereby increasing throttle response sensitivity by 50%. However, the electronic throttle response controller does not reduce the gradation of throttle signals as many claim. In reality, the throttle signal remains continuously adjustable, only changing from the previous 1:1 ratio to 1:1.x, where x is the signal amplification coefficient.

12

1

Share

How soon can I take the Subject 4 test after passing Subject 3?

After passing Subject 3, the timing for the Subject 4 test falls into three scenarios: taking it directly the same afternoon; within 9 days without an appointment, where you can take the Subject 4 test by presenting your ID at the test center within 9 days of passing Subject 3; or scheduling after 10 days, with the success of the appointment depending on the current number of test-takers, student priority, and temporary arrangements at the test center. Subject 4, also known as the Subject 4 theoretical test or driver's theoretical test, is part of the motor vehicle driver's license examination. It includes requirements for safe and civilized driving operations, knowledge of safe driving under adverse weather and complex road conditions, emergency handling methods for situations like tire blowouts, and post-accident processing knowledge. Subject 4 Test Notes: Test Duration: The test lasts 45 minutes, and making 12 mistakes (6 questions) will terminate the test session. Number of Questions: Depending on the type of driver's license, 50 questions are proportionally selected from the corresponding Subject 4 question bank. For car licenses, questions are drawn from a pool of 800, while for large vehicle licenses, they are drawn from 1023 questions, with each question worth 2 points. Question Types: The test includes single-choice questions (including true/false questions) and multiple-choice questions. The first 45 questions are single-choice, and the last 5 are multiple-choice. The test also includes animated questions, picture-based questions, scenario recognition questions, and text-based questions. Retake Notes: Failing Subject 4 only requires retaking Subject 4, which can be scheduled by the driving school without any limit on the number of retakes. There are no fees for retaking Subject 4. Subject 4 Test Tips: Strengthen weak areas by identifying the reasons for mistakes. For marked questions, avoid merely memorizing the correct answers. Instead, consult regulations, textbooks, or reference materials to understand and internalize the reasons for errors. Categorize and summarize questions by referring to the question bank analysis to identify similar questions. Many questions in the bank are similar and easily confused, so it's helpful to group them for analysis. For example, traffic signs for walking, hiking, pedestrian attention, crosswalks, and crosswalk attention have similar patterns and can be confusing. Learning them in categories reduces errors. Use memory techniques: Many questions in the bank involve numbers, which can be summarized for easier memorization. The driving test consists of 3 subjects: Subject 1, Subject 2, and Subject 3, with Subject 3 divided into two parts. Subject 4 is the colloquial term for the Subject 3 Safe and Civilized Driving Knowledge Test and is not a separate subject. Subject 1 refers to the examination on road traffic safety laws, regulations, and related knowledge; Subject 2 refers to the field driving skills test; and Subject 3 refers to the road driving skills and safe and civilized driving knowledge test. The safe and civilized driving knowledge test is conducted after Subject 3.

3

2

Share

Does changing the color of car calipers require registration?

Changing the color of calipers requires applying for modification registration of the motor vehicle. According to the "Road Traffic Safety Law," the following documents must be submitted: Original "Motor Vehicle Modification Registration Application Form." Original and photocopy of the identity documents of the motor vehicle owner and agent. Original motor vehicle registration certificate. Original motor vehicle license. Precautions for painting car calipers: The paint used must be heat-resistant. There are no additional methods for cleaning, as many caliper surfaces are not smooth. After cleaning as thoroughly as possible, the paint can be applied. However, the durability will not be long, as there are no protective measures, and the paint may be chipped by small stones, gravel, or brake dust. The brake booster and master cylinder are connected in series. Typically, it appears as a large black cylindrical or conical container. It is also a piston mechanism, with a diaphragm dividing the booster into two chambers. One side is connected to the engine intake pipe, while the other side is exposed to the outside atmosphere. Since the engine creates a vacuum on one side of the booster during operation, a significant pressure difference is generated across the diaphragm. This, combined with the pressure applied by the driver, pushes against the master cylinder to produce substantial braking force. Additionally, according to Article 10 of the "Motor Vehicle Registration Regulations," registered motor vehicles must apply for modification registration under the following circumstances: Change of body color. Replacement of the engine. Replacement of the body or frame. Replacement of the entire vehicle due to quality issues. Change of usage nature, such as converting a commercial vehicle to non-commercial or vice versa. Change of the motor vehicle owner's residence into or out of the jurisdiction of the vehicle management office. Furthermore, according to Article 15 of the "Road Traffic Safety Law of the People's Republic of China": Police cars, fire trucks, ambulances, and engineering rescue vehicles must be painted with designated patterns and equipped with alarms and warning lights as required. Other motor vehicles are prohibited from using patterns, alarms, or warning lights that are exclusive to or resemble those of the aforementioned vehicles.

4

5

Share

Is 95-octane gasoline mandatory for the Lavida 1.4T?

According to the official vehicle manual recommendation, the Lavida 1.4T should use 95-octane gasoline. In addition to checking the suitable gasoline grade in the vehicle manual, the Lavida 1.4T's fuel cap will also indicate the recommended octane rating. Generally, the engine's compression ratio can also determine the appropriate gasoline grade. 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. However, with the application of new technologies, the compression ratio alone cannot determine the gasoline grade, as high compression ratios can still be tuned to use lower-octane gasoline. Other factors, such as ignition timing, turbocharging technology, and Atkinson cycle technology, also play a role. Generally, higher-octane gasoline has a higher octane rating and better anti-knock properties. 92-octane gasoline contains 92% isooctane and 8% n-heptane, while 95-octane gasoline contains 95% isooctane and 5% n-heptane. If the Lavida 1.4T occasionally uses the wrong gasoline grade, simply switch back to the correct grade after consumption. However, long-term use of the wrong gasoline grade can have the following effects: Using a higher-octane gasoline in a vehicle designed for lower-octane fuel will not cause damage, but the increased octane rating may alter the fuel's ignition point, leading to delayed combustion in the engine. This reduces the engine's power output and thermal efficiency, resulting in poorer performance. Using a lower-octane gasoline in a vehicle designed for higher-octane fuel can cause engine knocking. The significantly lower octane rating lowers the fuel's ignition point, causing premature ignition during the compression stroke. If combustion occurs before the spark plug fires, resistance is created during the upward stroke. This resistance makes the engine run very unstably. Mild knocking may only increase noise without significant engine damage, but severe knocking indicates serious engine conditions. The vibrations not only affect driving stability but also cause abnormal wear on pistons and cylinders, potentially leading to severe engine damage like cylinder scoring.

16

5

Share

What is the reason for a car automatically refueling?

How Much Difference Between MIIT Comprehensive Fuel Consumption and Actual Fuel Consumption?

Will the Fuel Tank of a Flooded Car Get Water Inside?

Is It Necessary to Install an Electronic Throttle Response Controller?

How soon can I take the Subject 4 test after passing Subject 3?

Does changing the color of car calipers require registration?

Is 95-octane gasoline mandatory for the Lavida 1.4T?

What is the speed limit on the Shenji Expressway?

What is the coverage of water damage insurance for vehicles?

What are the consequences of turning on the car air conditioning without starting the engine?

What is the Function of a Car Synchronizer?