Ignition and combustion of fuel in the combustion chamber to produce high pressure gas. In the gas piston driven by the external work descends only. Piston down until the vent open (in this case in crank position, the gas expansion work at this end marine engines offer, a large number of in-cylinder exhaust gas on its own high-pressure free, people from the exhaust port to the exhaust pipe when the cylinder When the internal pressure dropped to close to the scavenging pressure (generally scavenging scavenging pressure tank 012, the piston down the scavenging port 3 open (in this case point 4 of the crank position, the scavenging air into the cylinder marine engine maker, The exhaust gas through the exhaust port in the cylinder driven out of the cylinder piston moves to TDC, the end of the stroke, but the scavenging process continues until the next stroke the exhaust port is closed (when the crank at the point position. · 4 · 342 third marine diesel engine overhaul Figure II-stroke diesel engine and scavenging Schematic diagram of the compression stroke: the piston moves upward from the bottom dead center, the piston before the scavenging port cover, supplied by the scavenging pump storage tank in the scavenging air, by scavenging port into the cylinder, the cylinder of the remaining exhaust gases are air into the cylinder through the exhaust port sweep of the cylinder. marine diesel engine structural advantages 1. Unique frame type main bearing structure, body stiffness, small vibration amplitude, low decibel noise .2 A cylinder a cover, easy vehicle maintenance treatment, reduce maintenance costs consumption .3 The main components are global purchased, to achieve a high engine configuration .4 accessories are completed, air coolers, sea and fresh water heat exchanger is installed On the diesel engine, the cabin layout to facilitate .5 diesel engine cooling systems inside and outside the two-cycle water-cooled, diesel engine with fresh water circulating cooling, the outer loop water by sea-fresh water heat exchanger for fresh water cooled diesel engine to improve the life of .6 . improve the protection and control system that uses diesel function monitoring device, it can automatically measure the speed, water temperature, oil temperature and pressure display marine diesel engine, when the engine parameters overrun automatic alarm and shutdown, optional remote control device .7 good design, the use of the water jacket exhaust pipe to keep the cabin temperature lower .8 good supporting adaptability, WD615C, WD618C series diesel engine flywheel, flywheel housing, engine monitoring instruments, the water jacket exhaust pipes, pumps and other parts of the sea Universal diesel engine installation size, flywheel and flywheel housing dimensions are the same, to facilitate the support and maintenance of .9 front of the crankshaft There are pulley grooves and connecting flange for customers to connect the power output device. Shandong Weifang Huadong marine engines _ (certification) _ marine engines supplied by Weifang Huadong Engine Co., Ltd. Weifang Huadong Engine (www.hdchai.com) is an industry leader in Shandong Weifang, the internal combustion engine over the years, the company implementing the scientific management, innovation and development, honesty and trustworthiness policy, and satisfy customer needs in Weifang Huadong leadership with the staff warmly welcome all inquiries negotiations to create a better future Weifang Huadong.