Expert analysis: The current situation of Ⅲ diesel engine reachs the nation dev

On July 10, 2008, by Chinese car trends the net is sponsorred, inc. of machine of Guangxi jade bavin and Chinese meaning approach Ma group assist do, center of monitoring of blowdown of motor vehicle of environmental protection ministry supports " banquet of couplet of news of trade of 2008 China motor is met first half of the year the conference " hold in Yunnan Kunming. On the meeting, mr Xu Moyi of Inc. of machine of bavin of jade of bibcock of Chinese diesel engine was done " country the current situation of Ⅲ diesel engine and development trend " report. The report was analysed at present enterprise of our country diesel engine to carry out a country in the round Ⅲ , develop the advantage inferior position of the technical line that new product place introduces.
Mr Xu Moyi points out, the code that derv car tail gas discharges is strict with each passing day, via approval of the State Council, rose on March 1, 2008, what always register license plate of the Beijing that register is light-duty the car that ignites type engine (the greatest total mass 3.5 tons multiply below use and business uses benzine car) , all must carry out a country 4 standards; Since July 1, 2008, what always register license plate of the Beijing that register is heavy-duty press engine burning type and heavy gas fuel to ignite type engine (namely derv and natural gas engine) public transportation, environmental sanitation, postal car, executive country 4 discharge a standard, the car that asks to install monitoring nitrogen oxide to discharge carries arrange diagnostic system (OBD) ; Since July 1, 2008, right inside countrywide limits the car of all new sales (benzine, derv) executive country Ⅲ discharges a standard.
The promoted diesel engine strictly ceaselessly technology that discharges code progresses: The structure of diesel engine from nature inspiratory to turbine pressure boost, add to turbine pressure boost again in cold, to EGR; On control strategy, transfer to be controlled to the electron from rigid control; Combustion process also arrives from two valve much valve, increase fuel spraying pressure; The water that oil tastes is divided and contain sulfur content to also get ameliorative. In technical course respect, at present home uses maximum pressure in all nozzle of pump of course, monomer, pump and electronic-controlled straight line pump adds EGR4 to plant course, from the point of foreign development, in all course and monomer pump are more mature technology, but as a result of its core component is installed by rich world, report and the foreign business monopoly such as Deerfu, not only the price is high, and supply is debatable also. To solve this problem, home is truckload factory and component business joint development go out electronic-controlled the technology that lists pump to add EGR continuously. This one technology is in cost and maintenance respect advantage are clear, at present already batch is used at truckload over, many enterprises are in positive development.
As to the country the development of Ⅲ above product, mr Xu thinks to two is plant optional criterion course, EGR PDF and SCR, two kinds of courses have inferior position each, SCR needs a car to carry urea container, need gas station to build the infrastructure that adds urea, and the injection pressure with EGR higher need, pressure boost that needs higher pressure, need increases the lube with cooling system capacity, better need, and oily bad news compares SCR tall 10% the left and right sides. Current, jade bavin and very much business chose SCR route.
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