Usually when the optional booster, in accordance with different operating characteristics of the turbocharger compressor system with line selection work position B on the right side of the surge line . At this point can ensure the supercharged engine reaches a predetermined targets and work in high-efficiency turbocharger area , but also to ensure that all of the work within the scope of the diesel engine turbocharger surge does not occur . Therefore, in general does not occur under normal circumstances surge . But when the working conditions change , such as when the pressurization system channel blockage occurs , the load is too high or too low, uneven load and engine load mutation , etc., with the working line will partially or completely into the surge zone ,Connecting Rods thus cause surge .
When the sea into the cryogenic air density becomes low and the ambient temperature becomes high, the intake air compressor becomes large , the energy obtained by the turbine is increased , so that the speed increases with the supercharger operating line moved to the lower, surge margin increases ; while in the hot waters of the contrary, that the surge margin decreases prone surge . The turbocharged diesel engine at low temperatures for some ships plying match turbocharged diesel engine without air cooler waters while sailing in high temperature or high temperature air coolers trade area with matching sailing in cold waters , due to the match between the two relationship changes, the operating point is easy to close the surge zone , causing the surge .
When the fuel injection system failure ,racing coilovers burning low-grade fuel oil , the fuel increase, high exhaust temperatures. Whether it is full load or part load , regardless of how serious afterburners , which are in the normal operating point tie with running line. With the burning end delay , exhaust temperature , turbocharger speed increases , the compressor flow increases, the pressure ratio increases, the operating point to the curve with high mobile and less surge margin
After the high-speed operation of the engine for a long time , you can not turn off immediately. When the engine work , some of the oil supply turbocharger rotor bearings for lubrication and cooling . After running the engine suddenly stopped , the oil pressure to drop rapidly to zero , the high temperature reached turbocharger middle part of the heat bearing housing can not be taken away quickly , and high-speed rotation inertia turbocharger rotor while still Therefore, if the engine is hot state a sudden stop , causing retention turbocharger oil overheating and damage to the bearing and shaft. Particularly to prevent sudden flameout Meng kicks after the throttle .
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