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According to the “Announcement on the Implementation of the National Phase V Gas Fired Ignition Engine and Vehicle Emission Standards†issued by the Ministry of Environmental Protection, since January 1, 2013, China's gas vehicle vehicles have uniformly implemented the V emission standards. Compared with the repeated postponement of the implementation of diesel IV emissions, the implementation rate of V emissions in gas vehicle countries can be described as lightning speed.
The dual pressures of rising oil prices and emission upgrades push gas vehicles into the eyes of people. Natural gas vehicles with cleaner emissions and lower fuel costs are expected to save energy and reduce emissions. The advent of the Gas Vehicle Country V era will make natural gas vehicles also face a series of problems such as non-compliance of fuel quality and a significant increase in costs. The implementation of the gas vehicle country V has therefore been put to the test. These are exactly what the industry had previously neglected.
Gas Vehicle Country V Faces the Test of Temperament
The failure of oil products has dragged on the hind legs of diesel vehicle emission upgrades and entered the era of the country V. “Temperature†may also hamper the pace of gas vehicle emission upgrades.
“After upgrading diesel engine III, a variety of problems often occur because users use substandard oil. Parts of high-pressure common-rail engines are more sophisticated than before, and oil products that do not meet the standard have a huge impact on the engine. Natural gas vehicles also The same problem exists, and the influence of 'temperament' will become more prominent after entering the country V. At present, the domestic understanding of natural gas is not enough, and even the standards for LNG for vehicles have not yet been formulated and improved. Emissions test should be equipped with its own standard gas, because at this stage the supply of gas at the market simply can not be used." Industry sources said.
In other words, the host plant's national V natural gas engine can meet the national V requirement in the emission test, but if it uses the common gas supplied on the market, it will be hard to say if it can reach the national V emission.
“Our country has not developed or used natural gas for a long time. Prior to this, the industry will devote more energy to researching natural gas engines. Therefore, the overall understanding of natural gas is not deep and the understanding of the impact of natural gas quality on the engine is also shallow. In fact, natural gas contains a variety of impurities, and emissions below the national IV level do not require 'natural quality' of natural gas, and the added gas in the market can meet the requirements.As the emission standards are upgraded, the engine's requirements for 'temperament' will also be corresponding. Improve.†said the industry insider said.
Compared with gasoline and diesel, the net performance of natural gas is no emission of particulate matter. However, emissions from natural gas vehicles still contain pollutants such as carbon monoxide and nitrogen oxides.
"As with oil products, natural gas also has problems with substandard quality. After natural gas comes out of pipelines, it has to carry out many tasks similar to degreasing, water removal, and impurity removal. Because there is no uniform standard, the quality of natural gas on the market is uneven. If the natural gas vehicles used by China V natural gas directly use the natural gas sold on the market, not only can the emission level not be guaranteed, but even the impurities such as sulfur contained in the natural gas with poor quality can cause damage to the engine, thereby reducing the reliability and service life of the engine. "The relevant person in charge of the research and development department of a natural gas engine at a host plant told the "Commercial Automotive News" reporter.
"Temperature" Does Not Uniformly Raise the Cost of China's V Vehicles
Gas vehicle country V standard has been implemented. In the case that “temperament†cannot be changed within a short time, the requirements for meeting the national V emission standard can only be worked on the engine. For example, a filter for filtering impurities is added, and a special corrosion-resistant material that can prevent sulfur corrosion in natural gas engines is used. With the continuous improvement of emission upgrades, these tasks will increase, and the direct consequence will be the increase in the cost of natural gas engines.
"Different gas sources, the calorific value of natural gas will be different, which will affect the engine's power. Due to the different quality of natural gas on the market, the calorific value can not be calibrated. So we can only increase the engine's adaptive function, depending on the fuel Calorific value is used for self-regulation.If the calorific value of natural gas and standard gas differs too much, it is difficult for the engine to achieve self-regulation. At this time, it is necessary to manually adjust and input the temperamental component data of the local natural gas to the computer so that the engine can be used normally. In the event that the quality of natural gas in the market cannot be changed, to ensure the performance of the engine, the engine itself can only be adjusted, and this will bring about an increase in costs. Although there is no specific calculation, we try to increase the cost. Control within 10%.†Jiang Zaixian, Deputy General Manager of Jinan Power Division of China National Heavy Duty Truck (Hong Kong) Co., Ltd., told Commercial Auto News.
At the same time, he also said: "At present, there are already V-natural gas vehicles reserved by users, although there is no large-scale promotion of sales, but the rising costs will definitely cause users to hesitate to purchase. National Phase IV natural gas vehicles and diesel vehicles compared There is already a large cost difference, and data shows that the price of natural gas vehicles is about 30% higher than that of diesel vehicles.If users choose natural gas vehicles, they will definitely consider how long it will take to recover the cost of car purchases by saving fuel expenses. The mileage is large enough to be able to recover the cost of multiple expenditures in one year, and users will be more willing to choose natural gas vehicles. If the price of natural gas vehicles is once again greatly increased due to emission upgrades, it will have an adverse effect on sales and promotion. ."
Vehicle gas standard lags or affects country V landing
At present, the country does not have a complete standard for liquefied natural gas for vehicles. How to deal with vehicle natural gas and what needs to be done to meet the requirements for the implementation of the National V emission standards are discussed in the industry, but there are no clear conclusions yet. The lag in the development of automotive natural gas standards will have an adverse impact on the implementation of natural gas country V emission standards.
“For many OEMs, at this stage, natural gas engines have technically been able to meet the National V standards. However, due to the lack of uniform standards for natural gas for vehicles, especially LNG for vehicles, there is a lot of natural gas in the market that does not meet the standards. The use of such a gas may cause the reliability of the engine and the vehicle to be reduced, failing to meet the requirements of the users.In this case, too rapid emission upgrade may lead to 'false country III' problems similar to diesel vehicles. If the vehicle malfunctions due to the use of substandard gas, this will force some manufacturers to recapture the previous technology and products, which will cause the emission of the entire vehicle to fail to meet the emission standards,†said an industry expert.
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