In which year was the China IV diesel standard implemented?

[DelStella]

Starting from January 1, 2015, the China IV emission standard was fully implemented for diesel vehicles. Automobile emission standards refer to the harmful gases emitted from exhaust, such as CO (carbon monoxide), HC + NOx (hydrocarbons and nitrogen oxides), and PM (particulate matter, soot). Below is more detailed information: 1. Automobile emissions refer to harmful gases discharged from exhaust, including CO (carbon monoxide), HC + NOx (hydrocarbons and nitrogen oxides), and PM (particulate matter, soot). These are all harmful gases produced during the engine's combustion process. 2. The China IV emission standard is the fourth-stage national standard for motor vehicle pollutant emissions. The main pollutants from vehicle emissions include HC (hydrocarbons), NOx (nitrogen oxides), CO (carbon monoxide), and PM (particulate matter). Through the application of technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices, the standard aims to control and reduce vehicle emissions to below specified levels.

[LeIsabel]

The National IV emission standard for diesel vehicles was officially implemented in July 2013. However, I remember it was rolled out in phases, with pilot programs starting in some cities as early as 2011. What worried us drivers most was whether fuel quality could keep up. Sure enough, in the beginning many gas stations had diesel with sulfur content exceeding standards, causing black smoke from vehicle exhaust pipes and getting pulled over by traffic police—we could only blame our bad luck. Looking back now, the implementation of this standard forced oil refineries to upgrade their equipment, which can be considered a good thing.

[Daphne]

I checked the information and it was clearly fully implemented in 2013. Buying a diesel light truck back then was particularly troublesome. The 4S shops' inventory vehicles were all China III standard, and on the eve of the new regulations, the vehicle management offices had long queues for transfers. A friend of mine bought a China III standard vehicle to save money, only to find that two years later, the restricted zones expanded, and he had to make urban deliveries in the middle of the night. He deeply regretted his decision.

[DelValeria]

The nationwide mandatory implementation was on July 1, 2013, but major cities like Beijing and Shanghai always jumped the gun. Back in 2012 when I ran a logistics company in Shanghai, newly purchased vehicles were already required to meet China IV standards. That year, the engines cost over 30,000 yuan more, and mechanics constantly complained about the urea system frequently triggering alarms, requiring daily monitoring of the urea fluid level.

[LucyLee]

Everyone in the freight industry remembers the hurdle of 2013. Diesel vehicles produced after July that year were required to have an aftertreatment system, adding SCR tanks and monitoring modules to the engine compartment. Our fleet had a batch of older models registered in June, which surprisingly became more sought-after than the new models when resold. There's always arbitrage opportunities during policy transition periods.

[VanAllison]

To be precise, the announcement was made in 2011 and scheduled for implementation in 2013. The most interesting part was the changes at the inspection stations. Getting a green label for a China III vehicle required connections, while China IV vehicles passed inspections with ease. My old Refine had modified exhaust, costing an extra 800 yuan for each annual inspection until I completely gave up on it in 2015 and bought a new car.