Development Of 6190 Longer-stroke Diesel Engine

On the basis of short-stroke diesel engine,6190 longer-stroke diesel engine is a newly developed straight-six engine, which mainly used in coastal and inland water for transport and fishing, also can be used for generating set on land. This thesis introduced emphatically the main structural parameters, structure design, the results of the performance test of 6190 longer-stroke diesel engine.To know the present situation of the development of long-stroke diesel engine technology in domestic and overseas, through the consulting of related literature, visiting the diesel engine market and users, we have a detailed research and market assessment for the long-stroke diesel engine. This thesis expounds the goal of development, main structural and performance parameters, main important systems, test of diesel engine and the results, according to the current market demand for diesel engine power.In the development process of 6190 longer-stroke diesel engine, we strictly follow the product design and development control procedure of the company, the specific requirements for marine diesel engine of the ships and fishing inspection departments. The overall development project of 6190 longer-stroke diesel engine has been formulated based on the structure characteristics of original diesel engine, the manufacture, test level of company, the design and manufacturing cost is under the condition of minimum as much as possible. The new diesel engine are analyzed in terms of power performance and fuel economy, parts strength. Through the analysis of main parameters, the general structure of diesel engine is determined.Many parts of diesel engine have been optimized in the design, such as the lubrication system, the cooling system, fuel supply system and others, the oil pump and fuel injection pump flow, inter-cooled device and oil cooler were matched respectively. The charging system is used in the diesel engine, variable urbocharger nozzle rings were matched according to the different working conditions of marine diesel engine. In order to ensure that the crankshaft can satisfy the requirement of high performance, the crank connecting rod mechanism have to redesign, oil cooled pistons is chosen and the shape of combustion chamber is optimized to guarantee the cooling effect.Based on the enterprise's current test standard, performance of 6190 longer-stroke diesel engine was tested. Data of the load characteristic, propulsion characteristics, fuel consumption, emissions and other main performance were acquired and gatherd. the paper states the test results by analyzing the performance, The experimental results shows,6190 longer-stroke diesel engine has reached the design target in the performance of power, fuel economy, exhaust emissions, etc. It gets much higher performance than the prototype engine.