The countdown to the National IV switch has begun. In December 2020, the Ministry of Ecology and Environmental Protection also released the final version of documents related to the upgrade of National III to National IV laws and standards, clarifying that the emission standards

Countdown to switching to National IV

In December 2020, the Ministry of Ecology and Environmental Protection also released the final version of documents on multiple laws and standards related to the upgrade from National III to National IV, clarifying that the emission standards for non-road mobile diesel engines will be upgraded from "National III" to "National IV" in 2022 The switch must be completed before December 1, 2020.

The hanging sword fell to the ground. By then, all non-road mobile machinery produced, imported and sold below 560 kW (including 560 kW) and the diesel engines they are equipped with shall comply with the requirements of the fourth stage.

National IV upgrade, for tractor manufacturing companies, firstly, the emission limit requirements are more stringent. Different from the National III stage, the National IV standard has separate emission limit requirements for hydrocarbons (HC) and nitrogen oxides (NOx). The National IV standards have stricter emission requirements for particulate matter (PM). Second, not only diesel engines must meet the standards, but also pay more attention to the emissions of finished products and strengthen supervision measures.

In order to ensure the smooth progress of the switch to National IV, China YTO has taken precautions, actively communicated with the marketing system, combined with the market's main sales areas and key models, quickly confirmed the configuration and quantity of verification vehicles for sale in the autumn market, and issued a trial production plan in advance The production of National IV verification vehicles was organized during low-production months. Of the first batch of 43 sales verification vehicles, 28 units were rolled off the production line before the end of production in June.

National IV tractors rolled off the production line in batches

In order to ensure the overall node tasks, no matter on weekends or at night, engineers from the Product R&D Department took the initiative to give up their rest time and carried out the refurbishment of the National IV market verification vehicles with the workshop employees despite the high temperature of more than 40 degrees. Work. Up to now, all hosts have met the storage standards and completed the set mission goals.

China YTO small and medium-sized tractor company, on the basis of the increase in horsepower of the entire range of medium-sized tractors, has reorganized the National IV product development plan, determined various work nodes, and promoted the implementation of various tasks as planned. In February 2022, after the spring, small and medium-sized tractor companies will immediately arrange the switch to National IV products for the new year, determine the main sales models and main sales configurations of medium-sized tractors, formulate National IV product development and technology finalization nodes, and arrange National IV products. Four parts procurement, quality control, production organization, market planning and after-sales service capacity building and other issues.

Technology Center organizes relevant personnel to review the MF504 National IV pipeline optimization prototype.

MF804 is equipped with Dongchai YTN3 product. As the main sales model of the MF series, the development time is tight, the test tasks are heavy, and the finalization node is early. It is the key machine for the National IV product development. type. Since YTN3 is a brand-new engine platform, there are many matters and difficulties in connecting the whole machine. The supervisor of the whole machine brought in technical personnel from the engine, electrical appliances, hydraulics, etc. to actively connect with the diesel engine company and analyze and solve the technical problems one by one, two months in advance. The drawing design was completed and the whole machine was rolled off the production line. The whole machine was delivered one month in advance. The calibration test of the whole machine is currently progressing smoothly. It is expected that all test work will be completed in the near future, making full preparations for subsequent design finalization and optional machine development.

html From March 1 to April, small and medium-sized tractor companies completed the assembly of 39 National IV complete machines. The products cover the full range of products such as MK/MF/ME/MC/SN. The technical finalization work of ME50/MF50 and other models has been completed. MF904/MF704 -6/ME704 and other main sales models have completed product development work, and the technical finalization will be completed by the end of June.

html From January to June, the Diesel Engine Company completed a total of 23 configuration technical finalization work for 6 typical platforms (LR4A, LR4M, LR6A, LR6M, YTN9, YTN3) with power ranging from 70 to 400 horsepower. In terms of performance development of Dongfanghong diesel engine, it has completed more than 70 calibration tests including bench performance calibration, complete machine power test, field adaptability calibration, PEMS test and three-high calibration, and relied on China YTO's unique complete machine test resources Conducted field verification of a full range of National IV diesel engines, fully verifying the comprehensive performance of non-road National IV diesel engines.

The following are pictures of China YTO participating in the 20th China Internal Combustion Engine and Parts Exhibition with high-end National IV products.

Dongfanghong YTN3 series diesel engine

Dongfanghong YTN5 series diesel engine

Dongfanghong YTN9 (YM6K) series diesel engine

Dongfanghong LR4A (explosion-proof diesel engine)

National IV switch, China YTO will take a high degree of responsibility and mission to cost-effectively, quality Stable National IV products lead the industry to smoothly complete upgrades.

Source: China Yituo