How to Detect Car Air Conditioning Faults?

What is the relationship between Haima and Mazda?

Mazda and Haima's relationship is that Haima Auto's predecessor was Hainan Mazda, also a joint venture of Mazda, abbreviated as "Haima." Later, Mazda partnered with FAW and Changan to re-register a new Haima Auto, which is the origin of Haima. Below is additional information about Mazda: 1. Brand Introduction: Mazda officially began producing cars in the early 1960s. Mazda Motor Corporation ranks just behind Toyota, Honda, and Nissan in Japan and is one of the world-renowned Japanese car brands. After Mazda partnered with Ford, it adopted a new logo. 2. Brand Development: Changan Mazda has emphasized the development of corporate R&D capabilities since its inception. Adhering to Mazda's engineering characteristics in its R&D system, Changan Mazda has established a precise and efficient R&D system based on the demands of the Chinese market. It has become a modern automotive enterprise with independent legal status.

9

3

Share

What Does Vehicle Urea Mean?

Here is a detailed introduction to vehicle urea: 1. Function: The primary purpose of using urea in vehicles is to reduce harmful nitrogen oxides in the exhaust into nitrogen and water. 2. Principle: The main harmful substances in exhaust are nitrogen oxides and particulates. Technical measures can be employed within the engine to reduce particulate emissions, leaving mainly nitrogen oxides in the exhaust. By injecting urea into the exhaust after-treatment device, the urea decomposes into ammonia at high temperatures. Under the action of a catalyst, the ammonia reacts with nitrogen oxides to produce harmless nitrogen and water. This device is called the SCR (Selective Catalytic Reduction) after-treatment system. 3. Urea consumption: Vehicles have a dedicated urea tank, and urea is consumed as long as the vehicle is running. Therefore, it is necessary to replenish it in a timely manner. Generally, about 4 liters of urea are consumed per 100 liters of diesel. The exact amount depends on factors such as engine displacement, model, manufacturer, etc. Different road conditions and loads can also affect urea consumption.

3

5

Share

Are There Automatic Transmission Models for Heavy Trucks?

There are automatic transmission models for heavy trucks, with AMT transmissions being the most common, and a few using dual-clutch transmissions. Generally, automatic transmissions are more convenient and faster than manual transmissions, and they also offer better fuel efficiency. Although AMT transmissions are not yet widely used in trucks, major manufacturers have begun to experiment with them. More relevant information is as follows: 1. Distribution of Automatic Transmission Trucks: In developed countries abroad, automatic transmission buses and trucks are quite common. According to relevant data, the proportion of automatic transmission buses and trucks in developed countries can be as high as 60%. However, China, as a developing country with a less developed economy, has not yet seen widespread adoption of automatic transmission buses and trucks domestically. 2. Reasons for the Lack of Popularity of Automatic Transmission Trucks: The main reason for the lack of widespread adoption of automatic transmission buses and trucks in China is the high cost. Besides the higher price of automatic transmission vehicles themselves, another factor is their higher fuel consumption. In China, buses and trucks are primarily used for commercial operations, where profit margins are a critical concern.

13

0

Share

Should a New Car Be Exposed to Sunlight?

It can be exposed to sunlight, but not for prolonged periods. Here are the hazards of prolonged sun exposure for cars: 1. Aging of Plastic Components: Ultraviolet rays in sunlight can easily cause the plastic components of a vehicle to age. Especially the sealing rings of the windows, if directly exposed to sunlight for long periods, can easily age and crack, leading to reduced sealing performance and potential water leakage or seepage. 2. Surge in Formaldehyde Levels Inside the Car: After prolonged sun exposure, objects inside the car may cause a significant increase in formaldehyde levels in the air. Formaldehyde is a colorless gas with a strong, irritating odor, which is highly harmful to human health. 3. Fading of Metal Body and Paint: The metal body and paint of a car will undergo thermal expansion and contraction under sunlight. However, since metal and paint have different expansion coefficients, the paint may develop fine cracks. Additionally, the long duration of sunlight in summer, combined with the ultraviolet rays, can accelerate the fading of the paint.

13

5

Share

What is the dilution ratio of concentrated windshield washer fluid to water?

Concentrated windshield washer fluid needs to be diluted before use. The recommended dilution ratio is 1:15 with purified water. Below is a detailed introduction to windshield washer fluid: 1. Composition: Commonly known as windshield wiper fluid in the market, it is a super-concentrated automotive glass cleaner. High-quality windshield washer fluid mainly consists of water, alcohol, ethylene glycol, corrosion inhibitors, and various surfactants. 2. Functions: It has properties such as non-stickiness, anti-static, anti-corrosion, dustproof, antifreeze, acid rain resistance, and UV protection. It also maintains the gloss and lubrication of rubber and plastic materials, preventing hardening and cracking. After use, it quickly removes stubborn stains, oil, and rain residue from the windshield, forming a protective film to prevent dust and oil buildup, ensuring clear and bright driving visibility, and gently protecting the wiper blades. 3. Classification: Automotive windshield washer fluid can be divided into super-concentrated and traditional types. Compared to super-concentrated washer fluid, traditional washer fluid may cause some damage to car glass with long-term use, while the lubricants added in super-concentrated washer fluid provide excellent protection for car glass.

10

4

Share

What Are the Main Symptoms of Car Malfunctions?

Car malfunction symptoms are mainly categorized into abnormal noises, unstable driving, failure to start, and inability to move. Here is some extended information about abnormal car noises: 1. Engine Abnormal Noises: Engine abnormal noises mainly include noises during startup, noises when the engine is cold, noises when the engine is hot, noises at idle, and noises at high engine speeds. Different noises under different conditions indicate faults in different components. 2. Transmission Abnormal Noises: Transmission abnormal noises are categorized into noises during startup, noises during gear shifting, noises in specific gears, and noises under load and no-load conditions. For example, noises during gear shifting may be caused by the clutch friction plate of that gear becoming too thin due to prolonged use, resulting in excessive clearance and impact during shifting. 3. Suspension Abnormal Noises: Suspension abnormal noises mainly come from the suspension's control arms, tie rods, and various upper and lower ball joints, which produce clicking sounds when there is clearance. Wheel bearings and tires sometimes produce humming sounds. These noises occur on uneven roads or when turning the steering wheel. For example, if there is a clicking sound from the lower part of the car when quickly turning the steering wheel left and right while the vehicle is stationary, it may indicate clearance in the tie rod ball joint, which requires professional inspection.

8

5

Share

How to Detect Car Air Conditioning Faults?

What is the relationship between Haima and Mazda?

What Does Vehicle Urea Mean?

Are There Automatic Transmission Models for Heavy Trucks?

Should a New Car Be Exposed to Sunlight?

What is the dilution ratio of concentrated windshield washer fluid to water?

What Are the Main Symptoms of Car Malfunctions?

Is Car Heat Insulation Film Useful?

What Causes Door Squeaking When Driving Over Bumps?

What are the precautions for driving in summer?

When to Use the Car Clutch?