Exhaust
Muffler
Mufflers
are installed within the exhaust system of
most internal combustion engines. With high performance
SS304 stainless steel universal mufflers can give you added power and a racing
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mesh wrapped around the perforated hole.
The
muffler is engineered as an acoustic soundproofing device
designed to reduce the loudness of the sound pressure created
by the engine by way of acoustic
quieting.
The
majority of the sound pressure produced by the engine is emanated out of the
vehicle via the same piping used by the silent exhaust gases. The emitted noise
is abated by a series of passages and chambers lined with roving fiberglass insulation
and/or resonating chambers harmonically tuned to cause destructive interference, wherein opposite
sound waves cancel each other out.
304 grade stainless
steel material, highly polished, mirror finish
stainless steel perforated
tube, Universal design, Easily installed: welded to the Exhaust System or tube
ends can be added for clamping installations, to connect muffler and Catalytic
converter..
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The Ministry of Environmental Protection's “Announcement on the Implementation of National Phase IV Standards for Vehicle Combustion Engine and Vehicle Pollutants Emissions†states: Since July 1, 2013, all vehicles produced, imported, sold, and registered have been compression-ignited. Engines and cars must meet the requirements of the National IV standard. The internal combustion engine industry stated that the entire industry must not be hindered by the State, and go all out to meet the National IV implementation.
Recently, Xing Min, executive vice chairman and secretary-general of the China Internal Combustion Engine Association, said at the meeting of the secretary general of the internal combustion engine branches that he takes the lead in advocating the implementation of the National IV emission standards. The internal combustion engine industry's clear-cut attitude towards the implementation of the National IV emission standards is ready! At this point, we must have a big picture.
In fact, from the analysis of the specific circumstances of the internal combustion engine industry, even in the automotive product field, due to the comprehensive range of its power size configuration and the depth and breadth of the accessory industry, it is not easy to fully implement the National IV emission standards. thing. However, according to the analysis of the preparation of internal combustion engine associations and their respective branches, the reporter has indeed formed a solid foundation for Chinese and foreign companies to build a solid foundation for the entire industrial chain from the entire engine to key components to general accessories. Four should only be a matter of time.
Branch field development ideas positive way
With a multi-cylinder small diesel engine with a total installed capacity of 2.4 million units in 2012, the emission upgrade requirements faced by related companies are very difficult. According to the person in charge of the branch, it is necessary to solve the problems of energy saving and emission reduction of a single-cylinder machine, strengthen the practice of the original mechanical pump, or add a mechanical oil supply automatic advancement device, or add the waste gas cylinder recirculation effect generated by the addition mechanism. New package upgrade requirements. After the pump end pressure is increased and the plug-in electronic unit pump is introduced, the bearing pressure of the body, camshaft and working face needs to be increased, and a large number of parameters, such as the installation angle of the nozzle, the number of nozzles and the bore diameter, the air passage and the combustion chamber, etc., must be increased. To optimize the experiment, the ECU must be calibrated to obtain the requirements for stable production consistency. The experience of successfully using the electronically controlled high-pressure monomer pump in the multi-cylinder machine has been transplanted to a single-cylinder diesel engine. The structure is compact, the injection pressure is high, and the fuel injection stability at low speed and low load is good, and the supply of control points at various operating conditions can be guaranteed. The optimal value of the advanced angle has better control flexibility, and the overall engine performance can be improved at low speeds, and the limit satisfaction rate is high.
As one of the key components for the engine to increase the power density and solve the heat load, the optimal design of the heat exchanger has also become a key node in the technology development. Through optimization analysis, air resistance, heat transfer efficiency and performance optimization models can be obtained. In order to save space, the current development direction of the heat exchanger is close to the compact type. At the same time, the heat coupling effect is taken into account to improve the utilization rate of waste heat and the heat exchange effect. According to the person in charge of the branch, compared with traditional heat exchangers, the compact heat exchanger compactly puts together a variety of heat exchanger devices to save assembly space, save energy, and reduce costs.
The branch of the filter called for the relevant state departments to incorporate the fuel filter into the national type IV approval certificate. It is recommended that the support of the state support the development of the filter media for the National IV engine filtration system, led by the industry association. The paper-making enterprises are mainly engaged in the production of filter manufacturers and scientific research institutes. They are assisted by the main engine factory and carry out special technical research.
Host manufacturers have invested in new products
For more than a year, the backbone enterprises of the internal combustion engine industry, led by the main engine plant, have also used their actions to enhance their respective strengths. For example, the Yuchai Group has invested 1.7 billion yuan to build a diesel engine casting production base. The second production line will be put into use within the year. By then, Yuchai will build the world's largest diesel engine casting production base. In this Yuchai Casting Center project with a total planning area of ​​1800 mu, six casting production lines have been built to produce high-strength, thin-walled, high-quality, high-precision diesel engine block and cylinder head castings. 40-liter micro, light, medium and heavy-duty diesel engine block and cylinder head.
In August last year, the signing ceremony for the Dongfeng Cummins Emissions Treatment System joint venture project was held in Wuhan. The initial investment was 150 million yuan. The company plans to put it into production in 2013. It is designed to produce 180,000 sets of various types of emission treatment system devices annually, mainly supplying all models of Dongfeng Cummins. Dongfeng commercial vehicle 4H, dCi11, X7 engine models. This project is an important embodiment of Dongfeng Cummins fulfilling its social responsibilities, and it is also a strategic move to adapt Dongfeng Commercial Vehicles to the National IV and the National 5th emission standards.
In April 2012, Shanghai Philippine Red held a new product launch for Cursor13 in Beijing. The main product was Cursor13 with a displacement of 12.9 liters. The domestic application was 350-480 horsepower and the maximum torque was 2200 Nm. The largest range of products is mainly used in large heavy trucks and construction machinery and other fields. It is understood that the Cursor13 is a new product based on the Euro VI platform. It uses an exhaust gas turbocharger and can be upgraded to meet the requirements of the country's four emissions through the connection of a post-processing system. It can also be easily upgraded to Euro V and Euro VI emission standards. .
In addition, the Dongfeng Chaochao CY4102-CS5B engine passed the State Environmental Protection Agency's State V motor vehicle emission standards and fuel demonstration projects, demonstrating that the Dongfeng Chaochao CY4102-CS5B engine's main emission targets can still be verified after undergoing rigorous durability testing. Meet the national five emission standards.
Standard industry is working hard to build a good system
It is not only the products and technologies of the main engine plant and main branch areas that are making efforts for energy saving and emission reduction of the country. The internal combustion engine industry has also highlighted this long-term goal of the country in standard setting. During the “Twelfth Five-Year Plan†period, the total number of standards to be revised in the field of internal combustion engine specialization reached 248. The key tasks include: electronically controlled fuel injection systems, alternative fuel engines and their key components, internal combustion engine emission control and aftertreatment systems, and internal combustion engine energy conservation. Saving materials (including remanufacturing), high-efficiency turbocharging, reliability of internal combustion engines and key components, electronic control technology for key parts, and safety of production processes for internal combustion engines aim to fully implement the "Twelfth Five-Year" machinery through the revision of these standards. General Plan for Industrial Development, Energy Conservation and Emission Reduction Planning for the Twelfth Five-Year Plan, and the Opinions of the General Office of the State Council on Strengthening the Energy-Saving and Emission Reduction of the Internal Combustion Engine Industry, and other special plans and opinions, initially establishing a scientific and reasonable standard system for internal combustion engines and promoting internal combustion engines. Green sustainable development of the industry.
Xing Min said that in the process of implementing the “Opinions of the General Office of the State Council on Strengthening Energy-saving and Emission-reduction of the Internal-combustion Engine Industry†of the internal combustion engine industry, in accordance with the requirements of the “Opinionsâ€, the industry association has further exerted itself to strengthen industry self-discipline and promote advanced technologies. The role of experience, promotion of project implementation, and promotion of standards development, implementation of corporate responsibilities, and solid promotion of key projects and tasks.