What do China III, China IV, and China V mean for vehicles?

1 Answers
Asher
07/23/25 11:57pm
China III, China IV, and China V refer to the vehicle emission standards. China III stands for the National Phase III Motor Vehicle Emission Standard, China IV represents the National Phase IV Motor Vehicle Emission Standard, and China V indicates the National Phase V Motor Vehicle Emission Standard. Vehicle emission standards are established to prevent pollution from the exhaust of compression-ignition and gas-fueled spark-ignition engine vehicles, protect the ecological environment, and safeguard human health. The vehicle emission standards are categorized into: 1. Vehicles with a total mass less than or equal to 3.5 tons equipped with spark-ignition or compression-ignition engines; 2. Vehicles with a total mass greater than 3.5 tons equipped with spark-ignition engines; 3. Vehicles with a total mass greater than 3.5 tons equipped with compression-ignition engines.
Was this review help?
1
1
Share
More Forum Discussions

What is the difference between 1.8L and 1.8T?

1.8L and 1.8T have the following differences: 1. The 1.8T engine is a turbocharged engine equipped with a turbocharger, while the 1.8L engine is a naturally aspirated engine, which is a conventional engine. 2. After the turbocharger of the 1.8T engine engages, its maximum power output is significantly higher than that of the 1.8L engine (typically 1.5 times that of a naturally aspirated engine). 3. In terms of long-term maintenance costs, the 1.8L engine is less expensive and generally more reliable in terms of quality. The maintenance costs for 1.8T models are considerably higher, including expenses such as regular servicing, which usually requires 95-octane gasoline and full synthetic oil. Additionally, the turbocharger needs replacement after reaching a certain mileage. Below are some relevant details: 1. Turbocharged (and supercharged) engines are denoted by "T," while standard naturally aspirated engines are denoted by "L." The preceding number represents the engine displacement. Turbocharging is a technology that utilizes exhaust gases from internal combustion engine operation to drive an air compressor. 2. The primary function of turbocharging is to increase the engine's air intake volume, thereby enhancing its power and torque output, making the vehicle more powerful.
14
2
Share

Does opening windows while sleeping in the car with AC on have any impact?

Opening windows while sleeping in the car with AC on does not have any impact, and it is also recommended to open windows for ventilation when sleeping in the car with AC on. When the car engine is running, if the gasoline in the cylinders does not burn completely, it produces high concentrations of carbon monoxide. While the car is moving, the air creates convection through the AC system, keeping the carbon monoxide concentration inside the car very low, so occupants won't feel anything. However, when the car is stationary with the AC still running and all doors and windows closed, the air inside the car cannot circulate. The carbon monoxide emitted by the engine can leak into the car and gradually accumulate, increasing its concentration, which can eventually lead to poisoning or even death of the occupants. Therefore, if you choose to rest in the car for an extended period, you should open both side windows slightly to allow ventilation, ensuring that carbon monoxide does not accumulate inside the car and maintaining a certain oxygen concentration. Additionally, avoid sleeping too deeply while resting in the car; it's best to set an alarm to wake up periodically. More importantly, do not use the AC in recirculation mode; allow the air inside the car to circulate with the outside air for safety. If the outdoor wind is strong, positioning the car with the front facing the wind can help direct exhaust gases away from the car, reducing the chance of exhaust entering the car and lowering the risk.
20
5
Share

What Causes Low-Speed Jerking?

Transmission jerking is the impact sensation caused by the inertia of moving parts inside the engine. The following are the reasons for jerking: 1. Engine jerking: During the process where engine speed is either raised or lowered, if not handled properly, sudden changes in engine speed during gear shifts can cause the inertia of the engine's internal moving parts to react against the vehicle body. 2. Low-speed jerking: When driving at low speeds, frequent gear shifts between first and second gears cause the clutch to repeatedly disengage and engage, preventing smooth power transmission in a short time, resulting in common low-speed jerking. Jerking sensations may occur during startup and low-speed driving.
4
2
Share

What does ACM mean in new energy vehicles?

ACM in new energy vehicles stands for Auxiliary-Control-Module in English, which translates to auxiliary control module in Chinese. Introduction to ACM: The ACM (Active Control Mount) system needs to be connected to the engine's intake manifold through an electromagnetic control valve (ECM), which is controlled by the electromagnetic control valve. Introduction to new energy vehicles: New energy vehicles refer to vehicles that use unconventional vehicle fuels as power sources (or use conventional vehicle fuels with new types of on-board power devices), integrating advanced technologies in vehicle power control and drive systems, resulting in vehicles with advanced technical principles, new technologies, and new structures.
16
0
Share

Will ETC be stolen if not used?

Nowadays, ETC basically won't be stolen even if not used. As long as the credit card in your device does not have the quick payment function activated, there is no need to worry about theft. To steal ETC, two conditions must be met: first, the owner's ETC must have a credit card inserted instead of a dedicated ETC stored-value card; second, the owner's credit card must have the quick payment function activated. Generally, this ETC credit card is only used for highway toll deductions and will not have the quick payment function activated. Benefits of installing ETC: Saves time, eliminating the hassle of waiting in line. Green and environmentally friendly, vehicles pass through toll stations without stopping, reducing noise and exhaust emissions and minimizing pollution. Saves wear and tear, reduces costs, decreases the frequency of vehicle starts and brakes, lowers wear and fuel consumption, and users can also enjoy a 5% discount on toll fees. Improves efficiency, ETC lanes can theoretically increase vehicle passing efficiency by 2-3 times, making traditional ETC updates faster and more high-tech. Compared to license plate payment, ETC technology is more mature and advantageous. ETC working principle: Through the onboard electronic tag installed on the vehicle's windshield, dedicated short-range communication is established with the microwave antenna in the ETC lane at the toll station. Computer networking technology is used for backend settlement processing with the bank, achieving the purpose of vehicles passing through highway or bridge toll stations without stopping while paying the fees.
3
1
Share

What is the fuel tank repair project?

Fuel tank repair is a routine automotive maintenance project, typically including inspecting the fuel lines, servicing and cleaning the fuel tank, and replacing sealing oil-resistant gaskets at various locations. Below is relevant information: 1. Gasoline: Gasoline is a volatile, flammable hydrocarbon mixture liquid derived from petroleum through distillation and cracking, used as fuel. It appears as a transparent liquid, is flammable, and has a distillation range of 30°C to 220°C. 2. Fuel tank: A fuel tank is a container for holding fuel in aircraft or automobiles, serving as a specialized container in hydraulic systems for storing hydraulic oil or hydraulic fluid. Fuel tanks can be divided into two types: open tanks and closed tanks.
6
1
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.